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Atarbashi-Moghadam F, Azadi A, Nokhbatolfoghahaei H, Taghipour N. Effect of simultaneous and sequential use of TGF-β1 and TGF-β3 with FGF-2 on teno/ligamentogenic differentiation of periodontal ligament stem cells. Arch Oral Biol 2024; 162:105956. [PMID: 38522213 DOI: 10.1016/j.archoralbio.2024.105956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 03/06/2024] [Accepted: 03/08/2024] [Indexed: 03/26/2024]
Abstract
OBJECTIVE The periodontal ligament is a crucial part of the periodontium, and its regeneration is challenging. This study compares the effect of simultaneous and sequential use of FGF-2 and TGF-β1 with FGF-2 and TGF-β3 on the periodontal ligament stem cells (PDLSCs) teno/ligamentogenic differentiation. DESIGN This study comprises ten different groups. A control group with only PDLSCs; FGF-2 group containing PDLSCs with a medium culture supplemented with FGF-2 (50 ng/mL). In other experimental groups, different concentrations (5 ng/mL or 10 ng/mL) of TGF-β1&-β3 simultaneously or sequentially were combined with FGF-2 on the cultured PDLSCs. TGF-β was added to the medium after day 3 in the sequential groups. Methyl Thiazolyl Tetrazolium (MTT) assay on days 3, 5, and 7 and Quantitative Real-time Polymerase Chain Reaction (RT-qPCR) analysis after day 7 were conducted to investigate PLAP1, SCX, and COL3A1, RUNX2 genes. All experiments were conducted in a triplicate. The One-way and Two-way ANOVA with Tukey post hoc were utilized to analyze the results of the MTT and RT-qPCR tests, respectively. A p-value less than 0.05 is considered significant. RESULTS The proliferation of cells on days 3, 5, and 7 was not significantly different among different experimental groups (P > 0.05). A higher expression of the PLAP1, SCX, and COL3A1 have been seen in groups with sequential use of growth factors; among these groups, the group using 5 ng/mL of TGF-β3 led other groups with the most amount of significant upregulation in PLAP1(17.69 ± 1.11 fold; P < 0.0001), SCX (5.71 ± 0.38 fold; P < 0.0001), and COL1A3 (6.35 ± 0.39 fold; P < 0.0001) expression, compared to the control group. The expression of the RUNX2 decreased in all groups compared to the control group; this reduction was more in groups with sequential use of growth factors. CONCLUSION The sequential use of growth factors can be more effective than simultaneous use in teno/ligamentogenic differentiation of PDLSCs. Moreover, treatment with 5 ng/mL TGF-β3 after FGF-2 was more effective than TGF-β1.
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Affiliation(s)
- Fazele Atarbashi-Moghadam
- Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Dental Research Center, Research Institute for Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Azadi
- DDS, Research Fellow, Dentofacial Deformities Research Center, Research Institute for Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hanieh Nokhbatolfoghahaei
- Dental Research Center, Research Institute for Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Niloofar Taghipour
- Dental Research Center, Research Institute for Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Angjelova A, Jovanova E, Polizzi A, Annunziata M, Laganà L, Santonocito S, Isola G. Insights and Advancements in Periodontal Tissue Engineering and Bone Regeneration. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:773. [PMID: 38792956 PMCID: PMC11123221 DOI: 10.3390/medicina60050773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/30/2024] [Accepted: 05/06/2024] [Indexed: 05/26/2024]
Abstract
The regeneration of periodontal bone defects continues to be an essential therapeutic concern in dental biomaterials. Numerous biomaterials have been utilized in this sector so far. However, the immune response and vascularity in defect regions may be disregarded when evaluating the effectiveness of biomaterials for bone repair. Among several regenerative treatments, the most recent technique of in situ tissue engineering stands out for its ability to replicate endogenous restorative processes by combining scaffold with particular growth factors. Regenerative medicine solutions that combine biomaterials/scaffolds, cells, and bioactive substances have attracted significant interest, particularly for bone repair and regeneration. Dental stem cells (DSCs) share the same progenitor and immunomodulatory properties as other types of MSCs, and because they are easily isolable, they are regarded as desirable therapeutic agents in regenerative dentistry. Recent research has demonstrated that DSCs sown on newly designed synthetic bio-material scaffolds preserve their proliferative capacity while exhibiting increased differentiation and immuno-suppressive capabilities. As researchers discovered how short peptide sequences modify the adhesion and proliferative capacities of scaffolds by activating or inhibiting conventional osteogenic pathways, the scaffolds became more effective at priming MSCs. In this review, the many components of tissue engineering applied to bone engineering will be examined, and the impact of biomaterials on periodontal regeneration and bone cellular biology/molecular genetics will be addressed and updated.
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Affiliation(s)
- Angela Angjelova
- University Dental Clinical Center St. Pantelejmon, Skopje, Faculty of Dentistry, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia; (A.A.); (E.J.)
| | - Elena Jovanova
- University Dental Clinical Center St. Pantelejmon, Skopje, Faculty of Dentistry, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia; (A.A.); (E.J.)
| | - Alessandro Polizzi
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy; (L.L.); (S.S.)
| | - Marco Annunziata
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via L. De Crecchio, 6, 80138 Naples, Italy;
| | - Ludovica Laganà
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy; (L.L.); (S.S.)
| | - Simona Santonocito
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy; (L.L.); (S.S.)
| | - Gaetano Isola
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy; (L.L.); (S.S.)
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Valverde A, Naqvi RA, Naqvi AR. Macrophage-enriched novel functional long noncoding RNAs LRRC75A-AS1 and GAPLINC regulate polarization and innate immune responses. Inflamm Res 2024; 73:771-792. [PMID: 38592458 DOI: 10.1007/s00011-024-01865-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 01/29/2024] [Accepted: 02/21/2024] [Indexed: 04/10/2024] Open
Abstract
INTRODUCTION Macrophages (Mφs) are functionally dynamic immune cells that bridge innate and adaptive immune responses; however, the underlying epigenetic mechanisms that control Mφ plasticity and innate immune functions are not well elucidated. OBJECTIVE To identify novel functions of macrophage-enriched lncRNAs in regulating polarization and innate immune responses. METHODS Total RNA isolated from differentiating monocyte-derived M1 and M2 Mφs was profiled for lncRNAs expression using RNAseq. Impact of LRRC75A-AS1, GAPLINC and AL139099.5 knockdown was examined on macrophage differentiation, polarization markers, phagocytosis, and antigen processing by flow cytometry and florescence microscopy. Cytokine profiles were examined by multiplex bead array and cytoskeletal signaling pathway genes were quantified by PCR-based array. Gingival biopsies were collected from periodontally healthy and diseased subjects to examine lncRNAs, M1/M2 marker expression. RESULTS Transcriptome profiling of M1 and M2 Mφs identified thousands of differentially expressed known and novel lncRNAs. We characterized three Mφ-enriched lncRNAs LRRC75A-AS1, GAPLINC and AL139099.5 in polarization and innate immunity. Knockdown of LRRC75A-AS1 and GAPLINC downregulated the Mφ differentiation markers and skewed Mφ polarization by decreasing M1 markers without a significant impact on M2 markers. LRRC75A-AS1 and GAPLINC knockdown also attenuated bacterial phagocytosis, antigen processing and inflammatory cytokine secretion in Mφs, supporting their functional role in potentiating innate immune functions. Mechanistically, LRRC75A-AS1 and GAPLINC knockdown impaired Mφ migration by downregulating the expression of multiple cytoskeletal signaling pathways suggesting their critical role in regulating Mφ migration. Finally, we showed that LRRC75A-AS1 and GAPLINC were upregulated in periodontitis and their expression correlates with higher M1 markers suggesting their role in macrophage polarization in vivo. CONCLUSION Our results show that polarized Mφs acquire a unique lncRNA repertoire and identified many previously unknown lncRNA sequences. LRRC75A-AS1 and GAPLINC, which are induced in periodontitis, regulate Mφ polarization and innate immune functions supporting their critical role in inflammation.
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Affiliation(s)
- Araceli Valverde
- Department of Periodontics, College of Dentistry, University of Illinois Chicago, Chicago, IL, 60612, USA.
- Department of Microbiology and Immunology, College of Medicine, University of Illinois Chicago, Chicago, IL, 60612, USA.
| | - Raza Ali Naqvi
- Department of Periodontics, College of Dentistry, University of Illinois Chicago, Chicago, IL, 60612, USA
- Department of Microbiology and Immunology, College of Medicine, University of Illinois Chicago, Chicago, IL, 60612, USA
| | - Afsar R Naqvi
- Department of Periodontics, College of Dentistry, University of Illinois Chicago, Chicago, IL, 60612, USA.
- Department of Microbiology and Immunology, College of Medicine, University of Illinois Chicago, Chicago, IL, 60612, USA.
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Valverde A, Naqvi RA, Naqvi AR. Non-coding RNA LINC01010 regulates macrophage polarization and innate immune functions by modulating NFκB signaling pathway. J Cell Physiol 2024; 239:e31225. [PMID: 38403999 PMCID: PMC11096022 DOI: 10.1002/jcp.31225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 02/27/2024]
Abstract
Innate immune response is regulated by tissue resident or infiltrating immune cells such as macrophages (Mφ) that play critical role in tissue development, homeostasis, and repair of damaged tissue. However, the epigenetic mechanisms that regulate Mφ plasticity and innate immune functions are not well understood. Long non-coding RNA (lncRNA) are among the most abundant class of transcriptome but their function in myeloid cell biology is less explored. In this study, we deciphered the regulatory role of previously uncharacterized lncRNAs in Mφ polarization and innate immune responses. Two lncRNAs showed notable changes in their levels during M1 and M2 Mφ differentiation. Our findings indicate that LINC01010 expression increased and AC007032 expression decreased significantly. LINC01010 exhibit myeloid cell-specificity, while AC007032.1 is ubiquitous and expressed in both myeloid and lymphoid (T cells, B cells and NK cells) cells. Expression of these lncRNAs is dysregulated in periodontal disease (PD), a microbial biofilm-induced immune disease, and responsive to lipopolysaccharide (LPS) from different oral and non-oral bacteria. Knockdown of LINC01010 but not AC007032.1 reduced the surface expression of Mφ differentiation markers CD206 and CD68, and M1Mφ polarization markers MHCII and CD32. Furthermore, LINC01010 RNAi attenuated bacterial phagocytosis, antigen processing and cytokine secretion suggesting its key function in innate immunity. Mechanistically, LINC01010 knockdown Mφ treated with Escherichia coli LPS exhibit significantly reduced expression of multiple nuclear factor kappa B pathway genes. Together, our data highlight functional role of a PD-associated lncRNA LINC01010 in shaping macrophage differentiation, polarization, and innate immune activation.
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Affiliation(s)
- Araceli Valverde
- Department of Periodontics, College of Dentistry, University of Illinois Chicago, Chicago, Illinois, United States
| | - Raza Ali Naqvi
- Department of Periodontics, College of Dentistry, University of Illinois Chicago, Chicago, Illinois, United States
| | - Afsar R. Naqvi
- Department of Periodontics, College of Dentistry, University of Illinois Chicago, Chicago, Illinois, United States
- Department of Microbiology and Immunology, College of Medicine, University of Illinois Chicago, Chicago, Illinois, United States
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Liu Y, Huang X, Ke H, Song X, Huang X, Sun S. Influence of Access Cavities on Maxillary Central Incisor Fracture Resistance: Finite Element Study. Int Dent J 2024:S0020-6539(24)00121-7. [PMID: 38692963 DOI: 10.1016/j.identj.2024.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/26/2024] [Accepted: 04/08/2024] [Indexed: 05/03/2024] Open
Abstract
INTRODUCTION AND AIMS Altering the position and orientation of the root canal access cavity passway, or modifying the reduction of dentin volume, can influence the strength of dentition. This study aimed to compare the effects of different access cavities on the biomechanical performances of maxillary central incisors with a finite element analysis. METHODS Based on the micro-computed tomography (CT) scan of a maxillary central incisor, the finite element models of the intact tooth and teeth with 4 access cavity designs: conservative incisal access cavity, incisal access cavity, conservative access cavity, and traditional access cavity were generated. Simulated occlusal forces were applied at the incisal edge of the incisor in the finite element analysis procedure. RESULTS The maximum von Mises stress and maximum principal stress in the cervical area are highest in the traditional access cavity group, followed by the conservative access cavity group, incisal access cavity group, and conservative incisal access cavity group. CONCLUSION The conservative access cavities minimise the extent of dentin removal from the cervical region, protecting the mechanical behaviour of the incisor. Moving the access cavity entry point to the incisal edge also improves the fracture resistance of the incisor. CLINICAL RELEVANCE This study's findings would help clinicians select the most appropriate endodontics access cavity method when performing the root canal on maxillary central incisors.
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Affiliation(s)
- Yujiang Liu
- Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Xinyao Huang
- Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Haoyu Ke
- Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Xinyi Song
- Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Xinmeng Huang
- Hospital of Stomatology, Jilin University, Changchun, PR China
| | - Shufen Sun
- Hospital of Stomatology, Jilin University, Changchun, PR China.
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Nicklisch N, Hinrichs C, Palaske L, Vach W, Alt KW. Variability in human tooth cementum thickness reflecting functional processes. J Periodontal Res 2024; 59:408-419. [PMID: 38126232 DOI: 10.1111/jre.13226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 11/19/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVE The aim of this study was to investigate the thickness of acellular extrinsic fibre cementum (AEFC) at four root positions of anterior and posterior teeth with special focus on functional aspects. Furthermore, the correlations between cementum thickness and chronological age and sex are investigated. BACKGROUND While numerous studies confirm continuous cementum apposition with age, masticatory forces as well as physiological and orthodontically induced tooth movements also have the potential to affect tooth cementum thickness. MATERIALS AND METHODS Undecalcified teeth were embedded in resin and transverse-sectioned in the cervical third of the root. Two sections per root were selected, and digital images at four positions were obtained (mesial, distal, oral, and vestibular) using light microscopy. The AEFC thickness of 99 teeth (anterior = 66, posterior = 33, male = 54, female = 45) were measured in both sections. The differences in mean values between root positions and the association of root position variation with tooth type, age, sex, and subject as well as the overall effects of age and sex were analysed using a mixed model. RESULTS First incisors and canines showed the greatest mean AFEC thickness, in contrast to premolars which had the lowest values. Differences were found across the four root positions, with a pattern varying considerably between anterior and posterior teeth and between maxilla and mandible in the anterior teeth. An interaction between root position and subject pointed to the existence of an individual component in the variation of AEFC thickness across the four root positions. There was an age trend with an almost linear increase in cementum thickness of 1 μm per year. Overall, females tended to exhibit a significantly lesser AEFC thickness compared to males. CONCLUSIONS Distinct differences in the pattern of thickness values across the four root positions in anterior and posterior teeth support the assumption that the AEFC is strongly affected by functional processes. In addition to sex-specific differences and age-related trends, the root position variation of AEFC thickness varies from individual to individual.
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Affiliation(s)
- Nicole Nicklisch
- Faculty of Medicine and Dentistry, Danube Private University, Krems, Austria
| | | | - Lukas Palaske
- Faculty of Medicine and Dentistry, Danube Private University, Krems, Austria
| | - Werner Vach
- Institute of Prehistory and Archaeological Science, University of Basel, Basel, Switzerland
| | - Kurt W Alt
- Faculty of Medicine and Dentistry, Danube Private University, Krems, Austria
- Institute of Prehistory and Archaeological Science, University of Basel, Basel, Switzerland
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Kuwada C, Kikuchi T, Kato A, Naitoh M, Kise Y, Mitani A, Honda M, Ariji E. Unusual imaging appearance of cemental tear in the maxillary first molar on cone-beam computed tomography: A case report. AUST ENDOD J 2024; 50:157-162. [PMID: 37964478 DOI: 10.1111/aej.12810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/12/2023] [Accepted: 10/22/2023] [Indexed: 11/16/2023]
Abstract
A cemental tear (CeT) is a definitive clinical entity and its radiographic appearance is well known in single-rooted teeth. However, the imaging features of CeT in multi-rooted teeth have not been clarified. We report a case of CeT which arose in the maxillary first molar and exhibited an unusual appearance in cone-beam computed tomography images. The torn structure was verified as cementum by micro-computed tomography and histological analysis. The hypercementosis, most likely induced by occlusal force, might have been torn from the root by a stronger occlusal force caused by the mandibular implant. An unusual bridging structure was created between the two buccal roots. These features may occur in multi-rooted teeth with long-standing deep pockets and abscesses that are resistant to treatment.
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Affiliation(s)
- Chiaki Kuwada
- Department of Oral and Maxillofacial Radiology, Aichi Gakuin University School of Dentistry, Nagoya, Japan
| | - Takeshi Kikuchi
- Department of Periodontology, Aichi Gakuin University School of Dentistry, Nagoya, Japan
| | - Akiko Kato
- Department of Oral Anatomy, Aichi Gakuin University School of Dentistry, Nagoya, Japan
| | - Munetaka Naitoh
- Department of Oral and Maxillofacial Radiology, Aichi Gakuin University School of Dentistry, Nagoya, Japan
| | - Yoshitaka Kise
- Department of Oral and Maxillofacial Radiology, Aichi Gakuin University School of Dentistry, Nagoya, Japan
| | - Akio Mitani
- Department of Periodontology, Aichi Gakuin University School of Dentistry, Nagoya, Japan
| | - Masaki Honda
- Department of Oral Anatomy, Aichi Gakuin University School of Dentistry, Nagoya, Japan
| | - Eiichiro Ariji
- Department of Oral and Maxillofacial Radiology, Aichi Gakuin University School of Dentistry, Nagoya, Japan
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Ma Q, Hu Y, Li H, Kuang Y, Li J, Song J. Developmental endothelial locus-1 promotes osteogenic differentiation and alveolar bone regeneration in experimental periodontitis with type 2 diabetes mellitus. J Periodontal Res 2024; 59:355-365. [PMID: 38102743 DOI: 10.1111/jre.13219] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 10/23/2023] [Accepted: 11/22/2023] [Indexed: 12/17/2023]
Abstract
OBJECTIVES This study sought to explore the role of developmental endothelial locus-1 (DEL-1) in osteogenic differentiation of human periodontal ligament stem cells (hPDLSCs) and investigate the therapeutic effect of DEL-1 in ligature-induced experimental periodontitis with type 2 diabetes mellitus (T2DM). BACKGROUND T2DM is a significant risk factor for periodontitis. Treatment modalities for periodontitis with T2DM are being explored. DEL-1 is a versatile protein that can modulate the different stages of inflammatory diseases including periodontitis. The direct effect of DEL-1 on osteogenic differentiation of PDLSCs in periodontitis with T2DM is poorly understood. METHODS Primary hPDLSCs were isolated from periodontal ligament tissue and identified by flow cytometry. In osteogenesis experiments, alkaline phosphatase (ALP), Alizarin Red staining and western blot were used to assess the osteogenic effect of DEL-1 on hPDLSCs in high glucose and inflammation environments. The mouse model of ligature-induced experimental periodontitis was established. H&E and Masson's trichrome staining were used to assess the change of periodontal tissue after local periodontal injection of DEL-1. Immunohistochemical staining was used to evaluate osteogenic-related protein expression. RESULTS hPDLSCs expressed mesenchymal stem cell (MSC)-specific surface markers and were negative for hematopoietic cell surface markers. hPDLSCs had the potential for multidirectional differentiation. DEL-1 could enhance the osteogenic differentiation of hPDLSCs in high glucose and inflammation environments, although it did not return to the control level. Histological staining showed that DEL-1 contributed to alveolar bone regeneration and osteogenic-related protein expression, but the degree of improvement in T2DM mice was lower than in non-T2DM mice. CONCLUSIONS In summary, we demonstrated that DEL-1 could promote osteogenic differentiation of hPDLSCs in high glucose and inflammation environment and rescue alveolar bone loss in experimental periodontitis with T2DM, which could provide a novel therapeutic target for periodontitis with T2DM.
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Affiliation(s)
- Qian Ma
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Yiyao Hu
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Han Li
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Yunchun Kuang
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Jie Li
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Jinlin Song
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
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Ren J, Li Z, Liu W, Fan Y, Qi L, Li S, Kong C, Zou H, Liu Z. Demineralized bone matrix for repair and regeneration of maxillofacial defects: A narrative review. J Dent 2024; 143:104899. [PMID: 38428719 DOI: 10.1016/j.jdent.2024.104899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/14/2024] [Accepted: 02/23/2024] [Indexed: 03/03/2024] Open
Abstract
OBJECTIVES Demineralized bone matrix (DBM) is a well-established bone graft material widely accepted by dentists and the public for its favorable osteoconductivity and osteoinductive potential. This article aimed to provide a narrative review of the current therapeutic applications and limitations of DBM in maxillofacial bone defects. STUDY SELECTION, DATA, AND SOURCES Randomized controlled trials, prospective or retrospective clinical studies, case series and reports, and systematic reviews. MEDLINE, PubMed, and Google Scholar were searched using keywords. CONCLUSIONS Some evidence supported the therapeutic application of DBM in periodontal intrabony defects, maxillary sinus lifts, ridge preservation, ridge augmentation, alveolar cleft repair, orthognathic surgery, and other regional maxillofacial bone defects. However, the limitations of DBM should be considered when using it, including potential low immunogenicity, instability of osteoinductive potential, handling of the graft material, and patient acceptance. CLINICAL SIGNIFICANCE With the increasing demand for the treatment of maxillofacial bone defects, DBM is likely to play a greater role as a promising bone graft material. Safe and effective combination treatment strategies and how to maintain a stable osteoinductive potential will be the future challenges of DBM research.
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Affiliation(s)
- Jiwei Ren
- Hospital of Stomatology, Jilin University, China
| | - Zhiwei Li
- Hospital of Stomatology, Jilin University, China
| | - Wantong Liu
- Hospital of Stomatology, Jilin University, China
| | - Yixin Fan
- Hospital of Stomatology, Jilin University, China
| | - Le Qi
- Hospital of Stomatology, Jilin University, China
| | - Sining Li
- Hospital of Stomatology, Jilin University, China
| | - Chen Kong
- Hospital of Stomatology, Jilin University, China
| | - He Zou
- Hospital of Stomatology, Jilin University, China
| | - Zhihui Liu
- Hospital of Stomatology, Jilin University, China.
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Liu A, Hayashi M, Ohsugi Y, Katagiri S, Akira S, Iwata T, Nakashima T. The IL-33/ST2 axis is protective against acute inflammation during the course of periodontitis. Nat Commun 2024; 15:2707. [PMID: 38548743 PMCID: PMC10978877 DOI: 10.1038/s41467-024-46746-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 03/07/2024] [Indexed: 04/01/2024] Open
Abstract
Periodontitis, which is induced by repeated bacterial invasion and the ensuing immune reactions that follow, is the leading cause of tooth loss. Periodontal tissue is comprised of four different components, each with potential role in pathogenesis, however, most studies on immune responses focus on gingival tissue. Here, we present a modified ligature-induced periodontitis model in male mice to analyze the pathogenesis, which captures the complexity of periodontal tissue. We find that the inflammatory response in the peri-root tissues and the expression of IL-6 and RANKL by Thy-1.2- fibroblasts/stromal cells are prominent throughout the bone destruction phase, and present already at an early stage. The initiation phase is characterized by high levels of ST2 (encoded by Il1rl1) expression in the peri-root tissue, suggesting that the IL-33/ST2 axis is involved in the pathogenesis. Both Il1rl1- and Il33-deficient mice exhibit exacerbated bone loss in the acute phase of periodontitis, along with macrophage polarization towards a classically activated phenotype and increased neutrophil infiltration, indicating a protective role of the IL-33/ST2 axis in acute inflammation. Thus, our findings highlight the hidden role of the peri-root tissue and simultaneously advance our understanding of the etiology of periodontitis via implicating the IL-33/ST2 axis.
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Affiliation(s)
- Anhao Liu
- Department of Cell Signaling, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Mikihito Hayashi
- Department of Cell Signaling, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Yujin Ohsugi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Sayaka Katagiri
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Shizuo Akira
- Laboratory of Host Defense, IFReC,Osaka University, 3-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Takanori Iwata
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Tomoki Nakashima
- Faculty of Dentistry, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.
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11
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Fujita T, Yuki T, Honda M. The construction of a microenvironment with the vascular network by co-culturing fibroblasts and endothelial cells. Regen Ther 2024; 25:138-146. [PMID: 38486822 PMCID: PMC10937109 DOI: 10.1016/j.reth.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 12/10/2023] [Accepted: 12/17/2023] [Indexed: 03/17/2024] Open
Abstract
Introduction Extracellular matrix (ECM) synthesis and deposition in fibroblasts, and vascularization via endothelial cells are essential for successful tissue regeneration. Fibroblasts can produce both ECM, physical support for maintaining homeostasis, and bioactive molecules, such as growth factors and cytokines. Endothelial cells can secrete growth factors and form vascular networks that enable the supply of nutrients and oxygen and remove metabolic products. Methods In this study, we focused on combining Human Periodontal Ligament Fibroblasts (HPLF) and Human Umbilical Vein Endothelial Cells (HUVEC) for tissue regeneration in clinical applications. Results The fibroblastic and angiogenic phenotypes were promoted in co-culture with HPLF and HUVEC at a ratio of 1:1 compared to HPLF or HUVEC mono-culture. The gene expression of ECM components and angiogenesis-related factors was also enhanced by HPLF/HUVEC co-culture. Despite an apparent increase in the expression of angiogenic factors, the levels of secreted growth factors decreased under co-culture conditions. These data suggest that ECM constructed by HPLF and HUVEC would act as a storage site for growth factors, which can later be released. Our results showed that cell-to-cell interactions between HPLF and HUVEC enhanced collagen synthesis and endothelial network formation, leading to the creation of highly vascularized constructs for periodontal tissue regeneration. Conclusion Successful periodontal tissue regeneration requires microenvironmental reconstruction and vascularization, which can be achieved using a co-culture system. In the present study, we found that fibroblastic and angiogenic phenotypes were enhanced by the co-culture of HPLF and HUVEC. The optimal culture conditions (1:1) could potentially accelerate tissue engineering, including ECM synthesis and EC tube formation, and these approaches can improve therapeutic efficacy after transplantation.
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Affiliation(s)
- Tatsuwo Fujita
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki 214-8571, Kanagawa, Japan
| | - Taigo Yuki
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki 214-8571, Kanagawa, Japan
| | - Michiyo Honda
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki 214-8571, Kanagawa, Japan
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12
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Iwama H, Kaku M, Thant L, Mizukoshi M, Arai M, Ono Y, Kitami K, Saito I, Uoshima K. Acellular Extrinsic Fiber Cementum Is Invariably Present in the Superficial Layer of Apical Cementum in Mouse Molar. J Histochem Cytochem 2024; 72:109-120. [PMID: 38288702 PMCID: PMC10851881 DOI: 10.1369/00221554241229130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/05/2024] [Indexed: 02/08/2024] Open
Abstract
The cementum is a highly mineralized tissue that covers the tooth root. The regional differences among the types of cementum, especially in the extrinsic fibers that contribute to tooth support, remain controversial. Therefore, this study used second harmonic generation imaging in conjunction with automated collagen extraction and image analysis algorithms to facilitate the quantitative examination of the fiber characteristics and the changes occurring in these fibers over time. Acellular extrinsic fiber cementum (AEFC) was invariably observed in the superficial layer of the apical cementum in mouse molars, indicating that this region of the cementum plays a crucial role in supporting the tooth. The apical AEFC exhibited continuity and fiber characteristics comparable with the cervical AEFC, suggesting a common cellular origin for their formation. The cellular intrinsic fiber cementum present in the inner layer of the apical cementum showed consistent growth in the apical direction without layering. This study highlights the dynamic nature of the cementum in mouse molars and underscores the requirement for re-examining its structure and roles. The findings of the present study elucidate the morphophysiological features of cementum and have broader implications for the maintenance of periodontal tissue health.
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Affiliation(s)
- Hajime Iwama
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Masaru Kaku
- Division of Bio-Prosthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Lay Thant
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
- Division of Dental Pharmacology, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
- Center for Advanced Oral Science, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Masaru Mizukoshi
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Moe Arai
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Yoshiki Ono
- Division of Bio-Prosthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Kohei Kitami
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Isao Saito
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Katsumi Uoshima
- Division of Bio-Prosthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
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13
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Cho JH, Çakmak G, Yi Y, Yoon HI, Yilmaz B, Schimmel M. Tooth morphology, internal fit, occlusion and proximal contacts of dental crowns designed by deep learning-based dental software: A comparative study. J Dent 2024; 141:104830. [PMID: 38163455 DOI: 10.1016/j.jdent.2023.104830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/13/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024] Open
Abstract
OBJECTIVES This study compared the tooth morphology, internal fit, occlusion, and proximal contacts of dental crowns automatically generated via two deep learning (DL)-based dental software systems with those manually designed by an experienced dental technician using conventional software. METHODS Thirty partial arch scans of prepared posterior teeth were used. The crowns were designed using two DL-based methods (AA and AD) and a technician-based method (NC). The crown design outcomes were three-dimensionally compared, focusing on tooth morphology, internal fit, occlusion, and proximal contacts, by calculating the geometric relationship. Statistical analysis utilized the independent t-test, Mann-Whitney test, one-way ANOVA, and Kruskal-Wallis test with post hoc pairwise comparisons (α = 0.05). RESULTS The AA and AD groups, with the NC group as a reference, exhibited no significant tooth morphology discrepancies across entire external or occlusal surfaces. The AD group exhibited higher root mean square and positive average values on the axial surface (P < .05). The AD and NC groups exhibited a better internal fit than the AA group (P < .001). The cusp angles were similar across all groups (P = .065). The NC group yielded more occlusal contact points than the AD group (P = .006). Occlusal and proximal contact intensities varied among the groups (both P < .001). CONCLUSIONS Crowns designed by using both DL-based software programs exhibited similar morphologies on the occlusal and axial surfaces; however, they differed in internal fit, occlusion, and proximal contacts. Their overall performance was clinically comparable to that of the technician-based method in terms of the internal fit and number of occlusal contact points. CLINICAL SIGNIFICANCE DL-based dental software for crown design can streamline the digital workflow in restorative dentistry, ensuring clinically-acceptable outcomes on tooth morphology, internal fit, occlusion, and proximal contacts. It can minimize the necessity of additional design optimization by dental technician.
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Affiliation(s)
- Jun-Ho Cho
- Department of Prosthodontics, Seoul National University Dental Hospital, Seoul, Republic of Korea
| | - Gülce Çakmak
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Yuseung Yi
- Department of Prosthodontics, Seoul National University Dental Hospital, Seoul, Republic of Korea
| | - Hyung-In Yoon
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea.
| | - Burak Yilmaz
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; Division of Restorative and Prosthetic Dentistry, The Ohio State University, Columbus, OH, USA
| | - Martin Schimmel
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
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Nitzsche A, Hennig CL, von Brandenstein K, Döding A, Schulze-Späte U, Symmank J, Jacobs C. GDF15 Modulates the Zoledronic-Acid-Induced Hyperinflammatory Mechanoresponse of Periodontal Ligament Fibroblasts. Cells 2024; 13:147. [PMID: 38247838 PMCID: PMC10814077 DOI: 10.3390/cells13020147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/29/2023] [Accepted: 01/08/2024] [Indexed: 01/23/2024] Open
Abstract
Orthodontic tooth movement (OTM) is thought to be impeded by bisphosphonate (BP) therapy, mainly due to increased osteoclast apoptosis and changes in the periodontal ligament (PdL), a connecting tissue between the alveolar bone and teeth. PdL cells, mainly fibroblasts (PdLFs), are crucial regulators in OTM by modulating force-induced local inflammatory processes. Recently, we identified the TGF-β/BMP superfamily member GDF15 as an important modulator in OTM, promoting the pro-inflammatory mechanoresponses of PdLFs. The precise impact of the highly potent BP zoledronate (ZOL) on the mechanofunctionality of PdLFs is still under-investigated. Therefore, the aim of this study was to further characterize the ZOL-induced changes in the initial inflammatory mechanoresponse of human PdLFs (hPdLFs) and to further clarify a potential interrelationship with GDF15 signaling. Thus, two-day in vitro treatment with 0.5 µM, 5 µM and 50 µM of ZOL altered the cellular properties of hPdLFs partially in a concentration-dependent manner. In particular, exposure to ZOL decreased their metabolic activity, the proliferation rate, detected using Ki-67 immunofluorescent staining, and survival, analyzed using trypan blue. An increasing occurrence of DNA strand breaks was observed using TUNEL and an activated DNA damage response was demonstrated using H2A.X (phosphoS139) staining. While the osteogenic differentiation of hPdLFs was unaffected by ZOL, increased cellular senescence was observed using enhanced p21Waf1/Cip1/Sdi1 and β-galactosidase staining. In addition, cytokine-encoding genes such as IL6, IL8, COX2 and GDF15, which are associated with a senescence-associated secretory phenotype, were up-regulated by ZOL. Subsequently, this change in the hPdLF phenotype promoted a hyperinflammatory response to applied compressive forces with an increased expression of the pro-inflammatory markers IL1β, IL6 and GDF15, as well as the activation of monocytic THP1 cells. GDF15 appeared to be particularly relevant to these changes, as siRNA-mediated down-regulation balanced these hyperinflammatory responses by reducing IL-1β and IL-6 expression (IL1B p-value < 0.0001; IL6 p-value < 0.001) and secretion (IL-1β p-value < 0.05; IL-6 p-value < 0.001), as well as immune cell activation (p-value < 0.0001). In addition, ZOL-related reduced RANKL/OPG values and inhibited osteoclast activation were enhanced in GDF15-deficient hPdLFs (both p-values < 0.0001; all statistical tests: one-way ANOVA, Tukey's post hoc test). Thus, GDF15 may become a promising new target in the personalized orthodontic treatment of bisphosphonatepatients.
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Affiliation(s)
- Ann Nitzsche
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany; (A.N.); (C.-L.H.); (K.v.B.); (C.J.)
| | - Christoph-Ludwig Hennig
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany; (A.N.); (C.-L.H.); (K.v.B.); (C.J.)
| | - Katrin von Brandenstein
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany; (A.N.); (C.-L.H.); (K.v.B.); (C.J.)
| | - Annika Döding
- Section of Geriodontics, Department of Conservative Dentistry and Periodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany; (A.D.); (U.S.-S.)
| | - Ulrike Schulze-Späte
- Section of Geriodontics, Department of Conservative Dentistry and Periodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany; (A.D.); (U.S.-S.)
| | - Judit Symmank
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany; (A.N.); (C.-L.H.); (K.v.B.); (C.J.)
| | - Collin Jacobs
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany; (A.N.); (C.-L.H.); (K.v.B.); (C.J.)
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15
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Prosper A, Lê S, Thomas C, Minty M, Hamel O, Blasco-Baque V, Canceill T. [Teeth and oral cavity at the heart of systemic health]. Med Sci (Paris) 2024; 40:10-15. [PMID: 38299897 DOI: 10.1051/medsci/2023189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024] Open
Abstract
Research into the interrelationships between oral and systemic diseases has been growing exponentially for over 20 years. Teeth and their supporting tissues can be affected by pathologies, particularly infectious ones, the consequences of which are felt locally in the oral cavity and at a distance in the body. Oral diseases frequently lead to the maintenance of an inflammatory state in oral bones and mucosa, which complicates the treatment of systemic inflammatory pathologies. The aim of this review is to take stock of current knowledge concerning the interrelationships that may exist between the oral environment and other organs, in both adults and children.
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Affiliation(s)
- Alison Prosper
- Université Toulouse III Paul Sabatier, faculté de santé, département odontologie, Toulouse, France - Service d'odontologie, hôpitaux de Toulouse, Toulouse, France - InCOMM (Intestine ClinicOmics Microbiota & Metabolism), UMR1297 Inserm/université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
| | - Sylvie Lê
- Université Toulouse III Paul Sabatier, faculté de santé, département odontologie, Toulouse, France - Service d'odontologie, hôpitaux de Toulouse, Toulouse, France - InCOMM (Intestine ClinicOmics Microbiota & Metabolism), UMR1297 Inserm/université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
| | - Charlotte Thomas
- Université Toulouse III Paul Sabatier, faculté de santé, département odontologie, Toulouse, France - Service d'odontologie, hôpitaux de Toulouse, Toulouse, France - InCOMM (Intestine ClinicOmics Microbiota & Metabolism), UMR1297 Inserm/université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
| | - Matthieu Minty
- Université Toulouse III Paul Sabatier, faculté de santé, département odontologie, Toulouse, France - Service d'odontologie, hôpitaux de Toulouse, Toulouse, France - InCOMM (Intestine ClinicOmics Microbiota & Metabolism), UMR1297 Inserm/université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
| | - Olivier Hamel
- Université Toulouse III Paul Sabatier, faculté de santé, département odontologie, Toulouse, France - Service d'odontologie, hôpitaux de Toulouse, Toulouse, France - URU Evolsan, équipe analyse des pratiques, université Toulouse III Paul Sabatier, Toulouse, France
| | - Vincent Blasco-Baque
- Université Toulouse III Paul Sabatier, faculté de santé, département odontologie, Toulouse, France - Service d'odontologie, hôpitaux de Toulouse, Toulouse, France - InCOMM (Intestine ClinicOmics Microbiota & Metabolism), UMR1297 Inserm/université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
| | - Thibault Canceill
- Université Toulouse III Paul Sabatier, faculté de santé, département odontologie, Toulouse, France - Service d'odontologie, hôpitaux de Toulouse, Toulouse, France - InCOMM (Intestine ClinicOmics Microbiota & Metabolism), UMR1297 Inserm/université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
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16
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Epicoco L, Pellegrino R, Madaghiele M, Friuli M, Giannotti L, Di Chiara Stanca B, Palermo A, Siculella L, Savkovic V, Demitri C, Nitti P. Recent Advances in Functionalized Electrospun Membranes for Periodontal Regeneration. Pharmaceutics 2023; 15:2725. [PMID: 38140066 PMCID: PMC10747510 DOI: 10.3390/pharmaceutics15122725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 11/26/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
Periodontitis is a global, multifaceted, chronic inflammatory disease caused by bacterial microorganisms and an exaggerated host immune response that not only leads to the destruction of the periodontal apparatus but may also aggravate or promote the development of other systemic diseases. The periodontium is composed of four different tissues (alveolar bone, cementum, gingiva, and periodontal ligament) and various non-surgical and surgical therapies have been used to restore its normal function. However, due to the etiology of the disease and the heterogeneous nature of the periodontium components, complete regeneration is still a challenge. In this context, guided tissue/bone regeneration strategies in the field of tissue engineering and regenerative medicine have gained more and more interest, having as a goal the complete restoration of the periodontium and its functions. In particular, the use of electrospun nanofibrous scaffolds has emerged as an effective strategy to achieve this goal due to their ability to mimic the extracellular matrix and simultaneously exert antimicrobial, anti-inflammatory and regenerative activities. This review provides an overview of periodontal regeneration using electrospun membranes, highlighting the use of these nanofibrous scaffolds as delivery systems for bioactive molecules and drugs and their functionalization to promote periodontal regeneration.
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Affiliation(s)
- Luana Epicoco
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
- Institute of Medical Physics and Biophysics, University of Leipzig, 04103 Leipzig, Germany
| | - Rebecca Pellegrino
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
| | - Marta Madaghiele
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
| | - Marco Friuli
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
| | - Laura Giannotti
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (L.G.); (B.D.C.S.); (L.S.)
| | - Benedetta Di Chiara Stanca
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (L.G.); (B.D.C.S.); (L.S.)
| | - Andrea Palermo
- Implant Dentistry College of Medicine and Dentistry, Birmingham B4 6BN, UK;
| | - Luisa Siculella
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (L.G.); (B.D.C.S.); (L.S.)
| | - Vuk Savkovic
- Clinic and Polyclinic for Oral and Maxillofacial Plastic Surgery, University Hospital Leipzig, 04103 Leipzig, Germany;
| | - Christian Demitri
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
| | - Paola Nitti
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
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Han N, Li X, Du J, Xu J, Guo L, Liu Y. The impacts of oral and gut microbiota on alveolar bone loss in periodontitis. J Periodontal Res 2023; 58:1139-1147. [PMID: 37712722 DOI: 10.1111/jre.13168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/12/2023] [Accepted: 07/20/2023] [Indexed: 09/16/2023]
Abstract
Periodontitis, a chronic infectious disease, primarily arises from infections and the invasion of periodontal pathogens. This condition is typified by alveolar bone loss resulting from host immune responses and inflammatory reactions. Periodontal pathogens trigger aberrant inflammatory reactions within periodontal tissues, thereby exacerbating the progression of periodontitis. Simultaneously, these pathogens and metabolites stimulate osteoclast differentiation, which leads to alveolar bone resorption. Moreover, a range of systemic diseases, including diabetes, postmenopausal osteoporosis, obesity and inflammatory bowel disease, can contribute to the development and progression of periodontitis. Many studies have underscored the pivotal role of gut microbiota in bone health through the gut-alveolar bone axis. The circulation may facilitate the transfer of gut pathogens or metabolites to distant alveolar bone, which in turn regulates bone homeostasis. Additionally, gut pathogens can elicit gut immune responses and direct immune cells to remote organs, potentially exacerbating periodontitis. This review summarizes the influence of oral microbiota on the development of periodontitis as well as the association between gut microbiota and periodontitis. By uncovering potential mechanisms of the gut-bone axis, this analysis provides novel insights for the targeted treatment of pathogenic bacteria in periodontitis.
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Affiliation(s)
- Nannan Han
- Laboratory of Tissue Regeneration and Immunology, Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiaoyan Li
- Laboratory of Tissue Regeneration and Immunology, Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Juan Du
- Laboratory of Tissue Regeneration and Immunology, Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Junji Xu
- Laboratory of Tissue Regeneration and Immunology, Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Lijia Guo
- Department of Orthodontics School of Stomatology, Capital Medical University, Beijing, China
| | - Yi Liu
- Laboratory of Tissue Regeneration and Immunology, Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Intarasuksanti C, Prapayasatok S, Kampan N, Sirabanchongkran S, Mahakkanukrauh P, Sastraruji T, Khongkhunthian P, Kuharattanachai K, Tripuwabhrut K. Effects of the cone-beam computed tomography protocol on the accuracy and image quality of root surface area measurements: An in vitro study. Imaging Sci Dent 2023; 53:325-333. [PMID: 38174039 PMCID: PMC10761297 DOI: 10.5624/isd.20230090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/01/2023] [Accepted: 08/03/2023] [Indexed: 01/05/2024] Open
Abstract
Purpose The objective of this study was to evaluate and compare the accuracy and image quality of root surface area (RSA) measurements obtained with various cone-beam computed tomography (CBCT) protocols, relative to the gold standard of micro-computed tomography (CT), in an in vitro setting. Materials and Methods Four dry human skulls were scanned using 8 different protocols, with voxel sizes of 0.15 mm, 0.3 mm, and 0.4 mm. Three-dimensional models of the selected teeth were constructed using CBCT and micro-CT protocols, and the RSA was automatically measured by the image-processing software. The absolute difference in the percentage of the RSA (%ΔRSA) was calculated and compared across the 8 CBCT protocols using repeated-measures analysis of variance. Finally, image quality scores of the RSA measurements were computed and reported in terms of percent distribution. Results No significant differences were observed in the %ΔRSA across the 8 protocols (P>0.05). The deviation in %ΔRSA ranged from 1.51% to 4.30%, with an increase corresponding to voxel size. As the voxel size increased, the image quality deteriorated. This decline in quality was particularly noticeable at the apical level of the root, where the distribution of poorer scores was most concentrated. Conclusion Relative to CBCT protocols with voxel sizes of 0.15 mm and 0.3 mm, the protocols with a voxel size of 0.4 mm demonstrated inferior image quality at the apical levels. In spite of this, no significant discrepancies were observed in RSA measurements across the different CBCT protocols.
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Affiliation(s)
- Chanikarn Intarasuksanti
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Sangsom Prapayasatok
- Division of Oral and Maxillofacial Radiology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Natnicha Kampan
- Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Supassara Sirabanchongkran
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Pasuk Mahakkanukrauh
- Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
- Excellence in Osteology Research and Training Center, Chiang Mai University, Chiang Mai, Thailand
| | - Thanapat Sastraruji
- Dental Research Center, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Pathawee Khongkhunthian
- Center of Excellence for Dental Implantology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Kachaphol Kuharattanachai
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Kanich Tripuwabhrut
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
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19
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Liang Y, Gao W, Deng S, Wu D, Jiang Y, Zhang Y, Qiu R. Graphene quantum dots promote migration and differentiation of periodontal ligament stem cells. Front Chem 2023; 11:1213507. [PMID: 38025053 PMCID: PMC10679356 DOI: 10.3389/fchem.2023.1213507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 11/01/2023] [Indexed: 12/01/2023] Open
Abstract
Graphene and its derivatives have attracted much attention as nanomaterials in bone tissue engineering because of their remarkable ability to induce cell osteogenic differentiation. However, graphene quantum dots (GQDs), as graphene derivatives, little is known about their osteodifferentiation- and osteoinduction-promoting capabilities, especially in the restoration of bone defect caused by periodontitis. Therefore, there is a growing need to investigate the effect of GQDs on periodontal ligament stem cells (PDLSCs). Here, we postulated that GQDs are a promising biocompatible nanomaterial that facilitated the migration and differentiation of PDLSCs, and use laboratory methods like CCK-8, transwell experiments, qRT-PCR, Alizarin red staining and immunofluorescence staining to evaluate. Our experiments confirmed that GQDs did not inhibit cell viability, with most cells remaining viable even at GQDs concentrations of up to 30 μg mL-1. Moreover, GQDs were found to significantly enhance PDLSC migration, with the peak effect observed at concentrations of 5 and 10 μg mL-1. Furthermore, GQDs accelerated osteoblastic differentiation in PDLSCs and induced the mineralization of calcium nodules. Additionally, GQDs were shown to promote fibroblast differentiation in PDLSCs compared to the control group. Thus, GQDs not only possessed low cytotoxicity and good biocompatibility, but also displayed the beneficial capability to migration and differentiation of PDLSCs, which indicated GQDs might be a potential nanomaterial for bone regeneration.
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Affiliation(s)
| | | | | | | | | | | | - Rongmin Qiu
- Guangxi Key Laboratory of Oral and Maxillofacial Surgery Disease Treatment, Guangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious Diseases, Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, Guangxi Clinical Research Center for Craniofacial Deformity, College of Stomatology, Hospital of Stomatology, Guangxi Medical University, Nanning, China
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20
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Krasilnikova O, Yakimova A, Ivanov S, Atiakshin D, Kostin AA, Sosin D, Shegay P, Kaprin AD, Klabukov I. Gene-Activated Materials in Regenerative Dentistry: Narrative Review of Technology and Study Results. Int J Mol Sci 2023; 24:16250. [PMID: 38003439 PMCID: PMC10671237 DOI: 10.3390/ijms242216250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/26/2023] [Accepted: 10/30/2023] [Indexed: 11/26/2023] Open
Abstract
Treatment of a wide variety of defects in the oral and maxillofacial regions requires the use of innovative approaches to achieve best outcomes. One of the promising directions is the use of gene-activated materials (GAMs) that represent a combination of tissue engineering and gene therapy. This approach implies that biocompatible materials will be enriched with gene-carrying vectors and implanted into the defect site resulting in transfection of the recipient's cells and secretion of encoded therapeutic protein in situ. GAMs may be presented in various designs depending on the type of material, encoded protein, vector, and way of connecting the vector and the material. Thus, it is possible to choose the most suitable GAM design for the treatment of a particular pathology. The use of plasmids for delivery of therapeutic genes is of particular interest. In the present review, we aimed to delineate the principle of work and various designs of plasmid-based GAMs and to highlight results of experimental and clinical studies devoted to the treatment of periodontitis, jaw bone defects, teeth avulsion, and other pathologies in the oral and maxillofacial regions.
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Affiliation(s)
- Olga Krasilnikova
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva St. 4, 249036 Obninsk, Russia
| | - Anna Yakimova
- A. Tsyb Medical Radiological Research Centre—Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Zhukov St. 10, 249031 Obninsk, Russia
| | - Sergey Ivanov
- A. Tsyb Medical Radiological Research Centre—Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Zhukov St. 10, 249031 Obninsk, Russia
- Department of Urology and Operative Nephrology, Patrice Lumumba Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklay St. 6, 117198 Moscow, Russia
| | - Dmitri Atiakshin
- Scientific and Educational Resource Center for Innovative Technologies of Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis, Patrice Lumumba Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Andrey A. Kostin
- Department of Urology and Operative Nephrology, Patrice Lumumba Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklay St. 6, 117198 Moscow, Russia
| | - Dmitry Sosin
- Centre for Strategic Planning and Management of Biomedical Health Risks of the Federal Medical Biological Agency, 119121 Moscow, Russia
| | - Peter Shegay
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva St. 4, 249036 Obninsk, Russia
| | - Andrey D. Kaprin
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva St. 4, 249036 Obninsk, Russia
- Department of Urology and Operative Nephrology, Patrice Lumumba Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklay St. 6, 117198 Moscow, Russia
| | - Ilya Klabukov
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Koroleva St. 4, 249036 Obninsk, Russia
- Department of Urology and Operative Nephrology, Patrice Lumumba Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklay St. 6, 117198 Moscow, Russia
- Obninsk Institute for Nuclear Power Engineering, National Research Nuclear University MEPhI, Studgorodok 1, 249039 Obninsk, Russia
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21
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Panahipour L, Abbasabadi AO, Gruber R. Gingival Fibroblasts Are Sensitive to Oral Cell Lysates Indicated by Their IL11 Expression. Bioengineering (Basel) 2023; 10:1193. [PMID: 37892923 PMCID: PMC10604186 DOI: 10.3390/bioengineering10101193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/05/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
Damaged cells that appear as a consequence of invasive dental procedures or in response to dental materials are supposed to release damage-associated signals. These damage-associated signals not only support tissue regeneration but might also contribute to unwanted fibrosis. The aim of this study was to identify a molecular target that reflects how fibroblasts respond to necrotic oral tissue cells. To simulate the cell damage, we prepared necrotic cell lysates by sonication of the osteocytic cell line IDG-SW3 and exposed them to gingival fibroblasts. RNAseq revealed a moderate increase in IL11 expression in the gingival fibroblasts, a pleiotropic cytokine involved in fibrosis and inflammation, and also in regeneration following trauma. Necrotic lysates of the human squamous carcinoma cell lines HSC2 and TR146, as well as of gingival fibroblasts, however, caused a robust increase in IL11 expression in the gingival fibroblasts. Consistently, immunoassay revealed significantly increased IL11 levels in the gingival fibroblasts when exposed to the respective lysates. Considering that IL11 is a TGF-β target gene, IL11 expression was partially blocked by SB431542, a TGF-β receptor type I kinase inhibitor. Moreover, lysates from the HSC2, TR146, and gingival fibroblasts caused a moderate smad2/3 nuclear translocation in the gingival fibroblasts. Taken together and based on IL11 expression, our findings show that fibroblasts are sensitive to damaged oral tissue cells.
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Affiliation(s)
- Layla Panahipour
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.)
| | - Azarakhsh Oladzad Abbasabadi
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.)
| | - Reinhard Gruber
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.)
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
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22
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Sindhusha VB, Rajasekar A. Preparation and Evaluation of Antimicrobial Property and Anti-inflammatory Activity of Fenugreek Gel Against Oral Microbes: An Invitro Study. Cureus 2023; 15:e47659. [PMID: 38022270 PMCID: PMC10669659 DOI: 10.7759/cureus.47659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 10/25/2023] [Indexed: 12/01/2023] Open
Abstract
Aim Periodontal dressings play a crucial role in periodontal surgery and dental procedures. These dressings have several functions and benefits, similar to surgical wound dressings used in other surgical contexts. Periodontal dressings protect the surgical site and control bleeding in the oral cavity as they exert pressure on tissue and blood vessels. By protecting the wound and stabilizing the tissues, periodontal dressings create an environment that encourages proper and faster healing. Recently, the use of periodontal pack has reported various postoperative discomfort to the patients. This led to the development of an interest in considering fenugreek as an alternative to periodontal dressing as it possesses various antidiabetic and hypolipidemic effects. Thus, fenugreek can be used as an alternative to periodontal dressing. The study aimed to prepare and evaluate the antimicrobial nature of fenugreek gel in oral microbes and the anti-inflammatory properties of gel with protein coagulation in egg albumin. Materials and methods The fenugreek gel preparation was done by grinding 100 g of fenugreek seeds into a powder and adding 100 ml of distilled water to the powder and then heating the mixture at 70°C for 30 minutes. Five milliliters of the fenugreek concentrate were added to an equal mixture of carboxymethyl cellulose and Carbopol which was mixed thoroughly to form a gel. The antimicrobial nature of fenugreek has been evaluated in various organisms such as Streptococcus mutans, Lactobacillus, Enterococcus faecalis, and Candida albicans whereas the anti-inflammatory property was evaluated by protein coagulation method in egg albumin. Results The results stated that the fenugreek gel at a concentration of 100 µg/ml showed a greater zone of inhibition (5.39 ± 0.05) compared with doxycycline (1.1 ± 0.08) for a high antimicrobial potential against all oral microbes. The anti-inflammatory activity of the gel by protein coagulation method in egg albumin showed greater inhibition (67.15±1.36) at 100 µg/ml of fenugreek extract when compared with aspirin (64.43±2.93). Paired t-test was done for both the properties and the p-value was less than 0.5 stating that the difference between the groups was statistically significant. Conclusion The present study showed that the fenugreek gel possesses higher antimicrobial and anti-inflammatory properties when compared with doxycycline and aspirin, respectively. Hence, fenugreek gel can be used as an alternative periodontal dressing to reduce postoperative inflammation.
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Affiliation(s)
- Vyshnavi B Sindhusha
- Periodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
| | - Arvina Rajasekar
- Periodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
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23
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Figueiredo TDM, Do Amaral GCLS, Bezerra GN, Nakao LYS, Villar CC. Three-dimensional-printed scaffolds for periodontal regeneration: A systematic review. J Indian Soc Periodontol 2023; 27:451-460. [PMID: 37781321 PMCID: PMC10538520 DOI: 10.4103/jisp.jisp_350_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 01/14/2023] [Accepted: 01/15/2023] [Indexed: 10/03/2023] Open
Abstract
Background As current ethical codes preclude determining whether the clinical improvements obtained with the use of three-dimensional (3D)-printed scaffolds represent true periodontal regeneration, the histological proof of evidence for regeneration must be demonstrated in animal models. Thus, this systematic review investigated the regenerative potential of 3D-printed scaffolds in animal models of periodontal defects. Materials and Methods A systematic search was performed in four databases (Medline, Embase, Web of Science, and Scopus) to identify preclinical controlled studies that investigated the use of 3D-printed scaffolds for periodontal regeneration. Studies limited to periodontal defects treated with 3D scaffolds were eligible for inclusion. The primary outcome was periodontal regeneration, assessed histologically as new bone, cementum, and periodontal ligament (PDL). This systematic review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Quality was assessed according to the SRYCLE score. Results Six studies met the inclusion criteria. Scaffolds were designed using computer-aided design software. While the absence of a scaffold resulted in defects repaired mainly with fibrous connective tissue, the use of nonguiding 3D scaffolds promoted some bone formation. Notably, the regeneration of cementum and functional PDL fibers perpendicularly inserted into the root surface and the alveolar bone was limited to the defects treated with multi-compartment fiber-guiding or ion-containing 3D scaffolds. Nevertheless, the quality of the evidence was limited due to the unclear risk of bias. Conclusions Despite the limitations of the available evidence, the current data suggest that the use of printed multi-compartment fiber-guiding or ion-containing 3D scaffolds improves periodontal regeneration in animal models.
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Affiliation(s)
| | | | - Gabriela Neiva Bezerra
- Department of Periodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Lais Yumi Souza Nakao
- Department of Periodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Cristina Cunha Villar
- Department of Periodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
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24
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McLaughlin V, Liu J, Kalim S, Nguyen K, Kim DG, Sun Z. Application of metal artifact reduction algorithm for CBCT diagnosis of temporary anchorage device-tooth root contact: inadequate to reduce false-positive rate. Dentomaxillofac Radiol 2023; 52:20220396. [PMID: 37427694 PMCID: PMC10461258 DOI: 10.1259/dmfr.20220396] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023] Open
Abstract
OBJECTIVES It was recently found that when cone beam computed tomography (CBCT) was used to examine temporary anchorage device (TAD)-tooth root contact, it tends to yield high false-positive (FP) diagnoses. This study investigated whether application of a metal artifact reduction (MAR) algorithm or reducing CBCT scan voxel-size can remediate this problem. METHODS 18 fresh pig cadaver mandibles underwent TAD placement bilaterally at first molar lingual furcation regions. CBCT scans were taken under varied MAR (absence, presence) and voxel-size (400 µm, 200 µm) settings. Then, TADs were removed and a micro-CT scan (27 µm voxel-size) of the TAD placement site was performed. Three raters, blinded of CBCT scan setting, independently diagnosed whether TADs were in contact with roots. The reliability and accuracy of CBCT diagnoses using micro-CT as the gold-standard were statistically examined. RESULTS Generally, CBCT diagnoses had intrarater (Cohen's κ: 0.54-1) and interrater (Fleiss' κ: 0.73-0.81) reliability, within the moderate to excellent range, which did not vary with MAR setting or scan voxel-size. For diagnostic accuracy, FP rate among all raters was mostly in the 15-25% range and did not change with MAR or scan voxel-size settings (McNemar tests, p > 0.05) while false-negative rate was relatively minimal and only occurred to one rater (9%). CONCLUSIONS When using CBCT to diagnose possible TAD-root contact, applying a currently available Planmeca MAR algorithm or reducing CBCT scan voxel-size from 400 µm to 200 µm may not decrease FP rate. Further optimization of the MAR algorithm for this purpose may be needed.
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Affiliation(s)
- Victoria McLaughlin
- Division of Orthodontics, College of Dentistry, Ohio State University, Columbus, OH, United States
| | - Jie Liu
- Division of Orthodontics, College of Dentistry, Ohio State University, Columbus, OH, United States
| | - Sonya Kalim
- Division of Oral and Maxillofacial Radiology, College of Dentistry, Ohio State University, Columbus, Ohio, United States
| | - Kristin Nguyen
- Division of Orthodontics, College of Dentistry, Ohio State University, Columbus, OH, United States
| | - Do-Gyoon Kim
- Division of Orthodontics, College of Dentistry, Ohio State University, Columbus, OH, United States
| | - Zongyang Sun
- Division of Orthodontics, College of Dentistry, Ohio State University, Columbus, OH, United States
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25
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Rao A, Lokesh J, D’Souza C, Prithvisagar KS, Subramanyam K, Karunasagar I, Kumar BK. Metagenomic Analysis to Uncover the Subgingival and Atherosclerotic Plaque Microbiota in Patients with Coronary Artery Disease. Indian J Microbiol 2023; 63:281-290. [PMID: 37781016 PMCID: PMC10533773 DOI: 10.1007/s12088-023-01082-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 06/25/2023] [Indexed: 10/03/2023] Open
Abstract
The role of periodontal pathogens in the initiation and progression of atherosclerosis has been extensively researched, yet a precise causal mechanism has not been established. The subgingival microbiota may be a source of dissemination and may contribute to the development of atherosclerosis; hence this study attempted to characterize and compare the subgingival and atherosclerotic plaques. Plaque samples were subjected to 16S rRNA-based metagenomics to study microbiota associated with subgingival and atherosclerotic plaques collected from patients with coronary artery disease. The PCoA analysis showed that the microbiomes of subgingival plaques were highly scattered and showed a diverse microbial composition, unlike the atherosclerotic plaques that did not show evident variability in the microbial composition and formed a close distinct group. The abundance of various genera in the subgingival plaques revealed Fusobacterium (11%), Acinetobacter (13%), Veillonella (9%), and Prevotella (11%) among the top ten genera. The atherosclerotic plaques contained Acinetobacter (39%), Chryseobacterium (9%), Rhizobium (5%), and Staphylococcus (4%). All the patients examined in this study had either generalized or localized periodontitis with varying degrees of severity. The community microbiota analysis revealed that 22 bacterial genera were shared between two different plaques, with Acinetobacter being dominant. Based on the Human Oral Microbiome Database, 55% of the shared microbiota in this study have been listed as periodontal microbiota, with some of them found in increased proportions in patients with periodontitis suggesting the translocation of bacteria from the periodontal pockets into the circulation. This study provides valuable insights into the possible relationship between periodontal pathogens and atherosclerotic cardiovascular disease. Graphical Abstract
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Affiliation(s)
- Amita Rao
- Nitte (Deemed to be University), Department of Periodontics, AB Shetty Memorial Institute of Dental Sciences (ABSMIDS), Deralakatte, Mangalore, 575018 India
| | - Jep Lokesh
- Université de Pau et des Pays de l′Adour, E2S UPPA. INRAE, NUMEA, Saint-Pée-sur-Nivelle, France
| | - Caroline D’Souza
- Nitte(Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangalore, 575018 India
| | - Kattapuni Suresh Prithvisagar
- Nitte(Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangalore, 575018 India
| | - Kodangala Subramanyam
- Department of Cardiology, Srinivas Institute of Medical Sciences and Research Centre, Mangalore, India
| | - Indrani Karunasagar
- Nitte(Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangalore, 575018 India
| | - Ballamoole Krishna Kumar
- Nitte(Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangalore, 575018 India
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26
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Armijo L, Mancl L, Dennison CR, Houg K, Romanyk D, Popowics T. In-fiber Bragg sensor measurements assess fluid effects on strain in the periodontal space of an ex-vivo swine incisor complex under mechanical loading. J Biomech 2023; 157:111729. [PMID: 37473706 DOI: 10.1016/j.jbiomech.2023.111729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 06/14/2023] [Accepted: 07/14/2023] [Indexed: 07/22/2023]
Abstract
The purpose of this study is to determine whether in-fiber Bragg grating (FBG) sensors detect changes within the periodontal ligament (PDL) of ex-vivo swine tooth-PDL-bone complex (TPBC) when manipulating fluid content. Recording strain will allow for a better understanding of the biomechanics of viscoelastic load transfer from the tooth to the PDL during chewing and/or orthodontic tooth movement, as well as replication of these dynamics in regenerated PDL tissues. FBG sensors placed within the PDL of swine incisor teeth were used to measure strain resulting from an intrusive load. Specimens were mounted in a custom platform within an MTS machine and a compressive load was applied at 0.3 mm/s to a depth of 0.5 mm and held for 10 s. Median peak strain and load and median absolute deviation (MAD) were compared: dry vs. saline (n = 19) with bias-corrected bootstrap 95% CI. Dry vs. saline conditions did not statistically differ (median peaks of 5με, 103-105 N) and recorded strains showed high repeatability (MAD of 0.82με, 0.72με, respectively). FBG sensors did not detect the fluid changes in this study, suggesting that the deformation of tissues in the PDL space collectively determine FBG strain in response to tooth loading. The repeatability of measurements demonstrates the potential for FBG sensors to assess the strain in the PDL space of an in vivo swine model.
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Affiliation(s)
- Leigh Armijo
- Dept. of Orthodontics, University of Washington School of Dentistry, Seattle, WA 98195, USA.
| | - Lloyd Mancl
- Dept. of Oral Health Sciences, University of Washington School of Dentistry, Seattle, WA 98195, USA.
| | | | - Kathryn Houg
- Dept. of Mechanical Engineering and School of Dentistry, University of Alberta, Edmonton, Alberta, Canada.
| | - Dan Romanyk
- Dept. of Mechanical Engineering and School of Dentistry, University of Alberta, Edmonton, Alberta, Canada.
| | - Tracy Popowics
- Box 357475, Dept. of Oral Health Sciences, 1959 Pacific Ave. NE, University of Washington School of Dentistry, Seattle, WA 98195, USA.
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27
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Menon N, Kishen A. Nociceptor-Macrophage Interactions in Apical Periodontitis: How Biomolecules Link Inflammation with Pain. Biomolecules 2023; 13:1193. [PMID: 37627258 PMCID: PMC10452348 DOI: 10.3390/biom13081193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 08/27/2023] Open
Abstract
Periradicular tissues have a rich supply of peripheral afferent neurons, also known as nociceptive neurons, originating from the trigeminal nerve. While their primary function is to relay pain signals to the brain, these are known to be involved in modulating innate and adaptive immunity by initiating neurogenic inflammation (NI). Studies have investigated neuroanatomy and measured the levels of biomolecules such as cytokines and neuropeptides in human saliva, gingival crevicular fluid, or blood/serum samples in apical periodontitis (AP) to validate the possible role of trigeminal nociceptors in inflammation and tissue regeneration. However, the contributions of nociceptors and the mechanisms involved in the neuro-immune interactions in AP are not fully understood. This narrative review addresses the complex biomolecular interactions of trigeminal nociceptors with macrophages, the effector cells of the innate immune system, in the clinical manifestations of AP.
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Affiliation(s)
| | - Anil Kishen
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada;
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28
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Tu Y, Zhao X, Zhao G, Ding Q, Sun Y, Zhang L. Assessment of physiological posterior-tooth displacement under habitual occlusal force by intraoral scanning using implant-supported crowns as the reference. J Prosthet Dent 2023:S0022-3913(23)00422-5. [PMID: 37500342 DOI: 10.1016/j.prosdent.2023.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 06/22/2023] [Accepted: 06/22/2023] [Indexed: 07/29/2023]
Abstract
STATEMENT OF PROBLEM Studies that have used digital methods to quantitatively evaluate physiological tooth displacement under occlusal force are sparse. PURPOSE The purpose of this clinical study was to measure physiological posterior tooth displacement under occlusal force by intraoral scanning and reverse engineering technology by using implants as the reference. MATERIAL AND METHODS A total of 14 participants received 15 implant-supported single mandibular first molar crowns. The surface data of maxillary and mandibular posterior teeth (U1 and L1) and the buccal occlusal data in the maximum intercuspal position (MIP) with habitual occlusal force were obtained by using an intraoral scanner (TRIOS 3, v20.1.2). The U1 and L1 data were segmented into single teeth, which were then aligned to the buccal occlusal data by using the "best-fit alignment" command to build the data under occlusal force (U2 and L2). U1 and L1 data were compared with U2 and L2 data to calculate the centroid and functional cusp vertex displacements and the long axis deflections of the second premolars and second molars, taking the first molar as the reference. The medians, and first quartile (Q1), third quartile (Q3) of the above data were reported, and the Shapiro-Wilk and Wilcoxon tests were used to analyze the differences (α=.05). RESULTS Under occlusal force, the median (Q1, Q3) centroid displacements of posterior teeth ranged from 61 (52, 101) μm to 146 (80, 186) μm; the functional cusp vertex displacements ranged from 82 (62, 117) μm to 146 (98, 189) μm, and the long axis deflections ranged from 0.45 (0.25, 0.87) degrees to 1.03 (0.52, 1.41) degrees. Mandibular second premolars displaced lingually, mesially, and apically; mandibular second molars displaced distally and apically; and maxillary second premolars and second molars displaced lingually and apically. CONCLUSIONS A digital method taking implant-supported single crowns as the reference was used to demonstrate physiological posterior-tooth displacement under habitual occlusal force.
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Affiliation(s)
- Ya Tu
- Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
| | - Xiaole Zhao
- Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
| | - Guangpu Zhao
- Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
| | - Qian Ding
- Attending Physician, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China.
| | - Yuchun Sun
- Professor, Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Research Center of Engineering and Technology for Computerized Dentistry, Beijing, PR China
| | - Lei Zhang
- Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
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29
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Kosewski P, De Angelis F, Sorrentino E, Mielczarek A, Buonvivere M, D’Arcangelo C. Effect of the Abutment Rigidity on the Wear Resistance of a Lithium Disilicate Glass Ceramic: An In Vitro Study. J Funct Biomater 2023; 14:395. [PMID: 37623640 PMCID: PMC10455685 DOI: 10.3390/jfb14080395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 08/26/2023] Open
Abstract
Lithium disilicate (LDS) glass ceramics are among the most common biomaterials in conservative dentistry and prosthodontics, and their wear behavior is of paramount clinical interest. An innovative in vitro model is presented, which employs CAD/CAM technology to simulate the periodontal ligament and alveolar bone. The model aims to evaluate the effect of the abutment rigidity on the wear resistance of the LDS glass ceramic. Two experimental groups (LDS restorations supported by dental implants, named LDS-on-Implant, or by hybrid ceramic tooth replicas with artificial periodontal ligament, named LDS-on-Tooth-Replica) and a control group (LDS-Cylinders) were compared. Fifteen samples (n = 15) were fabricated for each group and subjected to testing, with LDS antagonistic cusps opposing them over 120,000 cycles using a dual axis chewing simulator. Wear resistance was analyzed by measuring the vertical wear depth (mm) and the volume loss (mm3) on each LDS sample, as well as the linear antagonist wear (mm) on LDS cusps. Mean values were calculated for LDS-Cylinders (0.186 mm, 0.322 mm3, 0.220 mm, respectively), LDS-on-Implant (0.128 mm, 0.166 mm3, 0.199 mm, respectively), and LDS-on-Tooth-Replica (0.098 mm, 0.107 mm3, 0.172 mm, respectively) and compared using one-way-ANOVA and Tukey's tests. The level of significance was set at 0.05 in all tests. Wear facets were inspected under a scanning electron microscope. Data analysis revealed that abutment rigidity was able to significantly affect the wear pattern of LDS, which seems to be more intense on rigid implant-abutment supports compared to resilient teeth replicas with artificial periodontal ligament.
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Affiliation(s)
| | - Francesco De Angelis
- Unit of Restorative Dentistry and Endodontics, Department of Medical, Oral and Biotechnological Science, School of Dentistry, “G. D’Annunzio” University of Chieti, 66100 Chieti, Italy; (M.B.); (C.D.)
| | - Edoardo Sorrentino
- Department of Innovative Technologies in Medicine & Dentistry, “G. D’Annunzio” University of Chieti, 66100 Chieti, Italy;
| | - Agnieszka Mielczarek
- Department of Conservative Dentistry, Medical University of Warsaw, 02091 Warsaw, Poland;
| | - Matteo Buonvivere
- Unit of Restorative Dentistry and Endodontics, Department of Medical, Oral and Biotechnological Science, School of Dentistry, “G. D’Annunzio” University of Chieti, 66100 Chieti, Italy; (M.B.); (C.D.)
| | - Camillo D’Arcangelo
- Unit of Restorative Dentistry and Endodontics, Department of Medical, Oral and Biotechnological Science, School of Dentistry, “G. D’Annunzio” University of Chieti, 66100 Chieti, Italy; (M.B.); (C.D.)
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Palideh A, Vaghari-Tabari M, Nosrati Andevari A, Qujeq D, Asemi Z, Alemi F, Rouhani Otaghsara H, Rafieyan S, Yousefi B. MicroRNAs and Periodontal Disease: Helpful Therapeutic Targets? Adv Pharm Bull 2023; 13:423-434. [PMID: 37646047 PMCID: PMC10460817 DOI: 10.34172/apb.2023.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 05/07/2022] [Accepted: 07/01/2022] [Indexed: 09/01/2023] Open
Abstract
Periodontal disease is the most common oral disease. This disease can be considered as an inflammatory disease. The immune response to bacteria accumulated in the gum line plays a key role in the pathogenesis of periodontal disease. In addition to immune cells, periodontal ligament cells and gingival epithelial cells are also involved in the pathogenesis of this disease. miRNAs which are small RNA molecules with around 22 nucleotides have a considerable relationship with the immune system affecting a wide range of immunological events. These small molecules are also in relation with periodontium tissues especially periodontal ligament cells. Extensive studies have been performed in recent years on the role of miRNAs in the pathogenesis of periodontal disease. In this review paper, we have reviewed the results of these studies and discussed the role of miRNAs in the immunopathogenesis of periodontal disease comprehensively. miRNAs play an important role in the pathogenesis of periodontal disease and maybe helpful therapeutic targets for the treatment of periodontal disease.
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Affiliation(s)
| | - Mostafa Vaghari-Tabari
- Department of Clinical Biochemistry and Laboratory Medicine, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ali Nosrati Andevari
- Department of Biochemistry, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Durdi Qujeq
- Cellular and Molecular Biology Research Center (CMBRC), Health Research Institute, Babol University of Medical Sciences, Babol, Iran
- Department of Clinical Biochemistry, School of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Forough Alemi
- Department of Clinical Biochemistry and Laboratory Medicine, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Sona Rafieyan
- Department of Oral and Maxillofacial Pathology, School of Dentistry, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Bahman Yousefi
- Department of Clinical Biochemistry and Laboratory Medicine, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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Lösch L, Stemmler A, Fischer A, Steinmetz J, Schuldt L, Hennig CL, Symmank J, Jacobs C. GDF15 Promotes the Osteogenic Cell Fate of Periodontal Ligament Fibroblasts, thus Affecting Their Mechanobiological Response. Int J Mol Sci 2023; 24:10011. [PMID: 37373159 DOI: 10.3390/ijms241210011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/05/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
Periodontal ligament fibroblasts (PdLFs) exert important functions in oral tissue and bone remodeling following mechanical forces, which are specifically applied during orthodontic tooth movement (OTM). Located between the teeth and the alveolar bone, mechanical stress activates the mechanomodulatory functions of PdLFs including regulating local inflammation and activating further bone-remodeling cells. Previous studies suggested growth differentiation factor 15 (GDF15) as an important pro-inflammatory regulator during the PdLF mechanoresponse. GDF15 exerts its effects through both intracrine signaling and receptor binding, possibly even in an autocrine manner. The extent to which PdLFs are susceptible to extracellular GDF15 has not yet been investigated. Thus, our study aims to examine the influence of GDF15 exposure on the cellular properties of PdLFs and their mechanoresponse, which seems particularly relevant regarding disease- and aging-associated elevated GDF15 serum levels. Therefore, in addition to investigating potential GDF15 receptors, we analyzed its impact on the proliferation, survival, senescence, and differentiation of human PdLFs, demonstrating a pro-osteogenic effect upon long-term stimulation. Furthermore, we observed altered force-related inflammation and impaired osteoclast differentiation. Overall, our data suggest a major impact of extracellular GDF15 on PdLF differentiation and their mechanoresponse.
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Affiliation(s)
- Lukas Lösch
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany
| | - Albert Stemmler
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany
| | - Adrian Fischer
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany
| | - Julia Steinmetz
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany
| | - Lisa Schuldt
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany
| | | | - Judit Symmank
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany
| | - Collin Jacobs
- Department of Orthodontics, University Hospital Jena, Leutragraben 3, 07743 Jena, Germany
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Najafidoust M, Hashemi A, Oskui IZ. Effect of temperature on dynamic compressive behavior of periodontal ligament. Med Eng Phys 2023; 116:103986. [PMID: 37230701 DOI: 10.1016/j.medengphy.2023.103986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 04/04/2023] [Accepted: 04/30/2023] [Indexed: 05/27/2023]
Abstract
Periodontal ligament (PDL) attaches tooth root to the surrounding bone. Its existence between tooth and jaw bone is of utmost importance due to its significant role in absorbing and distributing physiological and para-physiological loading. According to the previous studies, various mechanical tests have been performed to characterize the mechanical properties of the PDL; however, all of them have been done at room temperature. To the best of our knowledge, this is the first study in which the testing was performed at body temperature. The present research was planned to measure the dependency of PDL's viscoelastic behavior on temperature and frequency. Three different temperatures, including body and room temperature, were opted to perform the dynamic compressive tests of the bovine PDL. In addition, a Generalized Maxwell model (GMM) was presented based on empirical outcomes. At 37 °C, amounts of loss factor were found to be greater than those in 25 °C, which demonstrates that the viscous phase of the PDL in higher temperatures plays a critical role. Likewise, by raising the temperature from 25 °C to 37 °C, the model parameters show an enlargement in the viscous part and lessening in the elastic part. It was concluded that the PDL's viscosity in body temperature is much higher than that in room temperature. This model would be functional for a more accurate computational analysis of the PDL at the body temperature (37 °C) in various loading conditions such as orthodontic simulations, mastication, and impact.
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Affiliation(s)
- Mohammad Najafidoust
- Biomedical Engineering Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran; Neuroscience Research Australia and Prince of Wales Clinical School, University of New South Wales, Randwick, NSW, Australia
| | - Ata Hashemi
- Biomedical Engineering Group, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran.
| | - Iman Z Oskui
- Biomedical Engineering Group, Faculty of Biomedical Engineering, Sahand University of Technology, Tabriz, Iran.
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Bourdon L, Attik N, Belkessam L, Chevalier C, Bousige C, Brioude A, Salles V. Direct-Writing Electrospun Functionalized Scaffolds for Periodontal Regeneration: In Vitro Studies. J Funct Biomater 2023; 14:jfb14050263. [PMID: 37233373 DOI: 10.3390/jfb14050263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/04/2023] [Accepted: 05/06/2023] [Indexed: 05/27/2023] Open
Abstract
Multiphasic scaffolds that combine different architectural, physical, and biological properties are the best option for the regeneration of complex tissues such as the periodontium. Current developed scaffolds generally lack architectural accuracy and rely on multistep manufacturing, which is difficult to implement for clinical applications. In this context, direct-writing electrospinning (DWE) represents a promising and rapid technique for developing thin 3D scaffolds with controlled architecture. The current study aimed to elaborate a biphasic scaffold using DWE based on two polycaprolactone solutions with interesting properties for bone and cement regeneration. One of the two scaffold parts contained hydroxyapatite nanoparticles (HAP) and the other contained the cementum protein 1 (CEMP1). After morphological characterizations, the elaborated scaffolds were assessed regarding periodontal ligament (PDL) cells in terms of cell proliferation, colonization, and mineralization ability. The results demonstrated that both HAP- and CEMP1-functionalized scaffolds were colonized by PDL cells and enhanced mineralization ability compared to unfunctionalized scaffolds, as revealed by alizarin red staining and OPN protein fluorescent expression. Taken together, the current data highlighted the potential of functional and organized scaffolds to stimulate bone and cementum regeneration. Moreover, DWE could be used to develop smart scaffolds with the ability to spatially control cellular orientation with suitable cellular activity at the micrometer scale, thereby enhancing periodontal and other complex tissue regeneration.
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Affiliation(s)
- Laura Bourdon
- Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS, Université Claude Bernard Lyon 1, Bâtiment Chevreul, 6 Rue Victor Grignard, 69622 Villeurbanne, France
| | - Nina Attik
- Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS, Université Claude Bernard Lyon 1, Bâtiment Chevreul, 6 Rue Victor Grignard, 69622 Villeurbanne, France
- Faculté d'Odontologie, Université Lyon 1, 11 Rue Guillaume Paradin, 69008 Lyon, France
| | - Liza Belkessam
- Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS, Université Claude Bernard Lyon 1, Bâtiment Chevreul, 6 Rue Victor Grignard, 69622 Villeurbanne, France
- Faculté d'Odontologie, Université Lyon 1, 11 Rue Guillaume Paradin, 69008 Lyon, France
| | - Charlène Chevalier
- Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS, Université Claude Bernard Lyon 1, Bâtiment Chevreul, 6 Rue Victor Grignard, 69622 Villeurbanne, France
- Faculté d'Odontologie, Université Lyon 1, 11 Rue Guillaume Paradin, 69008 Lyon, France
| | - Colin Bousige
- Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS, Université Claude Bernard Lyon 1, Bâtiment Chevreul, 6 Rue Victor Grignard, 69622 Villeurbanne, France
| | - Arnaud Brioude
- Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS, Université Claude Bernard Lyon 1, Bâtiment Chevreul, 6 Rue Victor Grignard, 69622 Villeurbanne, France
| | - Vincent Salles
- Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS, Université Claude Bernard Lyon 1, Bâtiment Chevreul, 6 Rue Victor Grignard, 69622 Villeurbanne, France
- LIMMS, CNRS-IIS UMI 2820, The University of Tokyo, Tokyo 153-8505, Japan
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
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Santos MS, Carvalho MS, Silva JC. Recent Advances on Electrospun Nanofibers for Periodontal Regeneration. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1307. [PMID: 37110894 PMCID: PMC10141626 DOI: 10.3390/nano13081307] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 03/29/2023] [Accepted: 04/04/2023] [Indexed: 06/19/2023]
Abstract
Periodontitis is an inflammatory infection caused by bacterial plaque accumulation that affects the periodontal tissues. Current treatments lack bioactive signals to induce tissue repair and coordinated regeneration of the periodontium, thus alternative strategies are needed to improve clinical outcomes. Electrospun nanofibers present high porosity and surface area and are able to mimic the natural extracellular matrix, which modulates cell attachment, migration, proliferation, and differentiation. Recently, several electrospun nanofibrous membranes have been fabricated with antibacterial, anti-inflammatory, and osteogenic properties, showing promising results for periodontal regeneration. Thus, this review aims to provide an overview of the current state of the art of these nanofibrous scaffolds in periodontal regeneration strategies. First, we describe the periodontal tissues and periodontitis, as well as the currently available treatments. Next, periodontal tissue engineering (TE) strategies, as promising alternatives to the current treatments, are addressed. Electrospinning is briefly explained, the characteristics of electrospun nanofibrous scaffolds are highlighted, and a detailed overview of electrospun nanofibers applied to periodontal TE is provided. Finally, current limitations and possible future developments of electrospun nanofibrous scaffolds for periodontitis treatment are also discussed.
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Affiliation(s)
- Mafalda S. Santos
- Department of Bioengineering, iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Marta S. Carvalho
- Department of Bioengineering, iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - João C. Silva
- Department of Bioengineering, iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Ying M, Zhang B. Daidzein promotes the proliferation and osteogenic differentiation of periodontal ligament stem cell. Oral Dis 2023; 29:1226-1233. [PMID: 34942044 DOI: 10.1111/odi.14113] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/22/2021] [Accepted: 12/03/2021] [Indexed: 11/29/2022]
Abstract
CONTEXT Daidzein is a kind of isoflavone compound with many biological functions. However, the specific mechanism regarding the treatment of periodontitis with daidzein is still unclear. OBJECTIVE To investigate the effect of daidzein on the proliferation and osteogenic differentiation of human periodontal ligament stem cells (hPDLSCs) and its mechanism. MATERIALS AND METHODS Human periodontal ligament stem cells from clinical samples were isolated in vitro and identified by flow cytometry. hPDLSCs were treated with different concentrations of daidzein. Cell proliferation ability and viability were measured by MTT assay and cell colony formation assay. Osteogenic differentiation and calcification of hPDLSCs were observed by alkaline phosphatase (ALP) staining and alizarin red staining. Western blot was used to detect the expression of c-myc, CyclinD1, osteogenic differentiation-related proteins, and Wnt/β-catenin signaling pathway proteins in hPDLSCs. RESULTS human periodontal ligament stem cells were positive for surface antigens CD146, STRO-1, and CD90 expression, but negative for CD45 expression, indicating the successful isolation of hPDLSCs. In addition, daidzein could significantly promote the proliferation, cell viability, ALP activity, and osteogenic differentiation of hPDLSC. At the same time, daidzein could notably increase the expression levels of c-myc, CyclinD1, osteogenic differentiation-related proteins, and Wnt/β-catenin signaling pathway proteins, while an inhibitor of Wnt/ β-catenin pathway, XAV-939, could reverse the effect caused by daidzein. DISCUSSION AND CONCLUSION Daidzein promotes the proliferation and osteogenic differentiation of hPDLSCs by activating Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Ming Ying
- Department of Orthodontics, School of Stomatology, China Medical University, Shenyang, China
| | - Bin Zhang
- Department of Oral-Maxillofacial Surgery, School of Stomatology, China Medical University, Shenyang, China
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Wang W, Song Y, Tian Y, Chen B, Liang Y, Liang Y, Li C, Li Y. TCPP/MgO-loaded PLGA microspheres combining photodynamic antibacterial therapy with PBM-assisted fibroblast activation to treat periodontitis. Biomater Sci 2023; 11:2828-2844. [PMID: 36857622 DOI: 10.1039/d2bm01959k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Bacteria eradication and subsequent periodontal tissue reconstruction is the primary task for periodontitis treatment. Commonly used antibiotic therapy suffers from antibiotic resistance. Meanwhile, promoting fibroblast activity is crucial for re-establishing a damaged periodontal structure. In addition to the fibroblast activation property of Mg2+, photobiomodulation (PBM) has recently attracted increasing attention in wound healing. Using the same 635 nm laser resource, PBM could simultaneously work with antibacterial photodynamic therapy (aPDT) to achieve antibacterial function and fibroblast activation effect. Herein, multifunctional microspheres were designed by employing poly (lactic-co-glycolic acid) (PLGA) microspheres to load tetrakis (4-carboxyphenyl) porphyrin (TCPP) and magnesium oxide (MgO) nanoparticles, named as PMT, with sustained Mg2+ release for 20 days. PMT achieved excellent antibacterial photodynamic effect for periodontal pathogens F. nucleatum and P. gingivalis by generating reactive oxygen species, which increases cell membrane permeability and destroys bacteria integrity to cause bacteria death. Meanwhile, PMT itself exhibited improved fibroblast viability and adhesion, with the PMT + light group revealing further activation of fibroblast cells, suggesting the coordinated action of Mg2+ and PBM effects. The underlying molecular mechanism might be the elevated gene expressions of Fibronectin 1, Col1a1, and Vinculin. In addition, the in vivo rat periodontitis model proved the superior therapeutic effects of PMT with laser illumination using micro-computed tomography analysis and histological staining, which presented decreased inflammatory cells, increased collagen production, and higher alveolar bone level in the PMT group. Our study sheds light on a promising strategy to fight periodontitis using versatile microspheres, which combine aPDT and PBM-assisted fibroblast activation functions.
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Affiliation(s)
- Wanmeng Wang
- School of Dentistry, Tianjin Medical University, Tianjin 300070, China.
| | - Yunjia Song
- School of Dentistry, Tianjin Medical University, Tianjin 300070, China.
| | - Yuan Tian
- School of Dentistry, Tianjin Medical University, Tianjin 300070, China.
| | - Bo Chen
- School of Dentistry, Tianjin Medical University, Tianjin 300070, China.
| | - Yunkai Liang
- School of Dentistry, Tianjin Medical University, Tianjin 300070, China.
| | - Yu Liang
- School of Dentistry, Tianjin Medical University, Tianjin 300070, China.
| | - Changyi Li
- School of Dentistry, Tianjin Medical University, Tianjin 300070, China.
| | - Ying Li
- School of Dentistry, Tianjin Medical University, Tianjin 300070, China.
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Limjeerajarus N, Sratong-on P, Dhammayannarangsi P, Tompkins KA, Kamolratanakul P, Phannarus K, Osathanon T, Limjeerajarus CN. Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars. Heliyon 2023; 9:e14276. [PMID: 36938472 PMCID: PMC10018569 DOI: 10.1016/j.heliyon.2023.e14276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/23/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
Purpose There are two commonly cited modulus of elasticity of the human periodontal ligament (EPDL), i.e., 6.89 ✕ 10-5 GPa (E1) and 6.89 ✕ 10-2 GPa (E2), which are exactly 1000-fold different from each other. This study aims to clarify the ambiguity of the two EPDL used for simulations and determine a more accurate EPDL value of human first premolars using experimental and simulation approaches. Methods Numerical simulations using finite element analysis were performed to analyze PDL deformation under an average Asian occlusal force. To confirm the results, simple and multi-component, true-scale 3D models of a human first premolar were used in the simulations. Finally, a compression test using a universal testing machine on PDL specimens was conducted to identify the compressive EPDL of human first premolars. Results The simulation results from both models revealed that E1 was inaccurate, because it resulted in excessive PDL deformation under the average occlusal force, which should not occur during mastication. Although the E2 did not lead to excessive PDL deformation, it was obtained by an error in unit conversion with no scientific backing. In contrast, the compression test results indicated that the compressive EPDL was 9.64 ✕ 10-4 GPa (E3). In the simulation, E3 did not cause excessive PDL deformation. Conclusion The simulation results demonstrated that both commonly cited EPDL values (E1 and E2) were incorrect. Based on the experimental and simulation results, the average compressive EPDL of 9.64 ✕ 10-4 GPa is proposed as a more accurate value for human first premolars. Clinical significance The proposed more accurate EPDL would contribute to more precise and reliable FEA simulation results and provide a better understanding of the stress distribution and deformation of dental materials, which will be beneficial to precision dentistry, orthodontics and restoration designs.
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Affiliation(s)
- Nuttapol Limjeerajarus
- Office of Research Affairs, Chulalongkorn University, Bangkok, 10330, Thailand
- Research Center for Advanced Energy Technology, Thai-Nichi Institute of Technology, Bangkok, 10250, Thailand
| | - Pimpet Sratong-on
- Research Center for Advanced Energy Technology, Thai-Nichi Institute of Technology, Bangkok, 10250, Thailand
| | | | - Kevin A. Tompkins
- Office of Research Affairs, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Paksinee Kamolratanakul
- Department of Oral and Maxillofacial Surgery, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Krisadi Phannarus
- Dental Department, Queen Sirikit National Institute of Child Health, Bangkok, 10400, Thailand
| | - Thanaphum Osathanon
- Dental Stem Cell Biology Research Unit and Department of Anatomy, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Chalida Nakalekha Limjeerajarus
- Center of Excellence in Genomics and Precision Dentistry and Department of Physiology, Chulalongkorn University, Bangkok, 10330, Thailand
- Excellence Center in Regenerative Dentistry, Chulalongkorn University, Bangkok, Thailand
- Corresponding author. Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand.
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Finite Element Analysis of the Mechanical Performance of Non-Restorable Crownless Primary Molars Restored with Intracoronal Core-Supported Crowns: A Proposed Treatment Alternative to Extraction for Severe Early Childhood Caries. J Clin Med 2023; 12:jcm12051872. [PMID: 36902658 PMCID: PMC10003140 DOI: 10.3390/jcm12051872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/13/2023] [Accepted: 02/22/2023] [Indexed: 03/03/2023] Open
Abstract
Early childhood caries (ECC) involve extensive coronal tooth structure loss, and tooth reconstruction remains highly challenging. To fulfill preclinical assessment, the present study investigated the biomechanics of non-restorable crownless primary molars that were restored by stainless steel crowns (SSC) using different composite core build-up materials. Computer-aided design-integrated 3D finite element and modified Goodman fatigue analyses were performed to determine stress distribution, risk of failure, fatigue life and dentine-material interfacial strength for the restored crownless primary molars. A dual-cured resin composite (MultiCore Flow), a light-cured bulk-fill resin composite (Filtek Bulk Fill posterior), a resin-modified glass-ionomer cement (Fuji II LC) and a nano-filled resin-modified glass-ionomer cement (NRMGIC; Ketac N100) were used as core build-up composite materials in the simulated models. The finite element analysis showed that types of core build-up materials affected the maximum von Mises stress only in the core materials (p-value = 0.0339). NRMGIC demonstrated the lowest von Mises stresses and revealed the highest minimum safety factor. The weakest sites were along the central grooves regardless of type of material, and the ratio of shear bond strength to maximum shear stress at the core-dentine interface of the NRMGIC group was lowest among the tested composite cores. However, all groups provided lifetime longevity from the fatigue analysis. In conclusion, core build-up materials differentially influenced the von Mises stress (magnitude and distribution) and the safety factor in crownless primary molars restored with core-supported SSC. However, all materials and the remaining dentine of crownless primary molars provided lifetime longevity. The reconstruction by core-supported SSC, as an alternative to tooth extraction, may successfully restore non-restorable crownless primary molars without unfavorable failures throughout their lifespan. Further clinical studies are required to evaluate the clinical performance and suitability of this proposed method.
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Schön CM, Craveiro RB, Niederau C, Conrads G, Jahr H, Pufe T, Wolf M. High concentrations of Porphyromonas gingivalis-LPS downregulate Tlr4 and modulate phosphorylation of ERK and AKT in murine cementoblasts. Ann Anat 2023; 246:152023. [PMID: 36400339 DOI: 10.1016/j.aanat.2022.152023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/28/2022] [Accepted: 11/07/2022] [Indexed: 11/17/2022]
Abstract
Porphyromonas gingivalis lipopolysaccharide (PG-LPS) is an important virulence factor potentially contributing to periodontal tissue destruction. Toll-like receptor 4 (Tlr4) is a key mediator of NF-kB activation during pathogen recognition. Previous work using Tlr4-specific antibodies demonstrated a partial neutralization of PG-LPS effects on murine cementoblasts, which can affect cell function and regulate gene expression of osteoclastic markers. PG-LPS also potentially influence the inflammation process and the resorption of mineralized tissues. Yet, such inflammatory responses and cell signaling events remain to be characterized at the protein level. We thus investigated the effect of 1 and 10 µg/ml of PG-LPS, respectively, on cell morphology, cell viability, and selected key downstream molecules of the Tlr4 signaling cascade in cementoblasts. High concentrations of PG-LPS (10 µg/ml) significantly reduced cell viability after 48 h. Upon PG-LPS-stimulation, Tlr4 was significantly downregulated. Equally, IκBα, a downstream molecule, was downregulated in terms of phosphorylation and protein production. Furthermore, downstream signaling kinases, like serine/threonine kinase phospho-AKT and the mitogen-activated protein kinase (MAPK)-family, specifically phospho-ERK1/2, were significantly upregulated under high PG-LPS-concentrations. We provide new insights into PG-LPS-triggered intracellular signaling pathways in cementoblasts and thus deliver a basis for further research in PG-mediated periodontal inflammation.
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Affiliation(s)
| | - Rogerio B Craveiro
- Department of Orthodontics, Dental Clinic, RWTH Aachen University, Germany.
| | - Christian Niederau
- Department of Orthodontics, Dental Clinic, RWTH Aachen University, Germany
| | - Georg Conrads
- Division of Oral Microbiology and Immunology, Department of Operative Dentistry, Periodontology and Preventive Dentistry, University Hospital, RWTH Aachen University, Germany
| | - Holger Jahr
- Department of Anatomy and Cell Biology, University Hospital RWTH Aachen, Germany; Department of Orthopedic Surgery, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Thomas Pufe
- Department of Anatomy and Cell Biology, University Hospital RWTH Aachen, Germany
| | - Michael Wolf
- Department of Orthodontics, Dental Clinic, RWTH Aachen University, Germany
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Yang X, Ma Y, Wang X, Yuan S, Huo F, Yi G, Zhang J, Yang B, Tian W. A 3D-Bioprinted Functional Module Based on Decellularized Extracellular Matrix Bioink for Periodontal Regeneration. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2205041. [PMID: 36516309 PMCID: PMC9929114 DOI: 10.1002/advs.202205041] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/15/2022] [Indexed: 05/14/2023]
Abstract
Poor fiber orientation and mismatched bone-ligament interface fusion have plagued the regeneration of periodontal defects by cell-based scaffolds. A 3D bioprinted biomimetic periodontal module is designed with high architectural integrity using a methacrylate gelatin/decellularized extracellular matrix (GelMA/dECM) cell-laden bioink. The module presents favorable mechanical properties and orientation guidance by high-precision topographical cues and provides a biochemical environment conducive to regulating encapsulated cell behavior. The dECM features robust immunomodulatory activity, reducing the release of proinflammatory factors by M1 macrophages and decreasing local inflammation in Sprague Dawley rats. In a clinically relevant critical-size periodontal defect model, the bioprinted module significantly enhances the regeneration of hybrid periodontal tissues in beagles, especially the anchoring structures of the bone-ligament interface, well-aligned periodontal fibers, and highly mineralized alveolar bone. This demonstrates the effectiveness and feasibility of 3D bioprinting combined with a dental follicle-specific dECM bioink for periodontium regeneration, providing new avenues for future clinical practice.
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Affiliation(s)
- Xueting Yang
- State Key Laboratory of Oral DiseasesNational Engineering Laboratory for Oral Regenerative MedicineEngineering Research Center of Oral Translational MedicineMinistry of EducationDepartment of Oral and Maxillofacial SurgeryWest China Hospital of StomatologySichuan UniversityChengdu610041P. R. China
| | - Yue Ma
- State Key Laboratory of Oral DiseasesNational Engineering Laboratory for Oral Regenerative MedicineEngineering Research Center of Oral Translational MedicineMinistry of EducationWest China Hospital of StomatologySichuan UniversityChengdu610041P. R. China
| | - Xiuting Wang
- State Key Laboratory of Oral DiseasesNational Engineering Laboratory for Oral Regenerative MedicineEngineering Research Center of Oral Translational MedicineMinistry of EducationDepartment of Oral and Maxillofacial SurgeryWest China Hospital of StomatologySichuan UniversityChengdu610041P. R. China
| | - Shengmeng Yuan
- State Key Laboratory of Oral DiseasesNational Engineering Laboratory for Oral Regenerative MedicineEngineering Research Center of Oral Translational MedicineMinistry of EducationDepartment of Oral and Maxillofacial SurgeryWest China Hospital of StomatologySichuan UniversityChengdu610041P. R. China
| | - Fangjun Huo
- State Key Laboratory of Oral DiseasesNational Engineering Laboratory for Oral Regenerative MedicineEngineering Research Center of Oral Translational MedicineMinistry of EducationWest China Hospital of StomatologySichuan UniversityChengdu610041P. R. China
| | - Genzheng Yi
- State Key Laboratory of Oral DiseasesNational Engineering Laboratory for Oral Regenerative MedicineEngineering Research Center of Oral Translational MedicineMinistry of EducationDepartment of Oral and Maxillofacial SurgeryWest China Hospital of StomatologySichuan UniversityChengdu610041P. R. China
| | - Jingyi Zhang
- Chengdu Shiliankangjian Biotechnology Co., Ltd.Chengdu610041P. R. China
| | - Bo Yang
- State Key Laboratory of Oral DiseasesNational Engineering Laboratory for Oral Regenerative MedicineEngineering Research Center of Oral Translational MedicineMinistry of EducationDepartment of Oral and Maxillofacial SurgeryWest China Hospital of StomatologySichuan UniversityChengdu610041P. R. China
| | - Weidong Tian
- State Key Laboratory of Oral DiseasesNational Engineering Laboratory for Oral Regenerative MedicineEngineering Research Center of Oral Translational MedicineMinistry of EducationDepartment of Oral and Maxillofacial SurgeryWest China Hospital of StomatologySichuan UniversityChengdu610041P. R. China
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Zapf AM, Fey K, Büttner K, Gröf M, Staszyk C. Periodontal structures in horses with pituitary pars intermedia dysfunction: A histological evaluation. Front Vet Sci 2023; 10:1114445. [PMID: 36733635 PMCID: PMC9887139 DOI: 10.3389/fvets.2023.1114445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 01/02/2023] [Indexed: 01/18/2023] Open
Abstract
Introduction Pituitary pars intermedia dysfunction (PPID) and dental disorders are of major concern in horses older than 15 years. Although PPID in geriatric horses and dental disorders in all age groups are well described, a connection between this endocrine disease and pathological changes in equine dental structures has not yet been investigated. In humans, periodontitis is considered to be a complication of systemic diseases like diabetes mellitus type 2, obesity and various conditions leading to an impaired immune response. In PPID, cross links to insulin and immune dysregulations are proven. The aim of this study was to compare histological findings of the gingiva and the sub gingival periodontal ligament of PPID affected horses with control horses. Methods In a case-control morphometric descriptive study, 145 dental locations of 10 PPID affected horses (27.3 ± 2.06 years) were compared with 147 dental locations of 10 controls (21.4 ± 4.12 years). Histological parameters were leukocyte infiltration, keratinization of gingival epithelium, blood vessel supply of the periodontium and structure of cementum. Results The distribution and localization of gingival leukocyte infiltrations (LI) in PPID affected horses was more often multifocal to coalescing (p = 0.002) and reached into deeper parts of the periodontium, sometimes down to the sub gingival periodontal ligament (PDL). Aged animals of both groups showed higher prevalence (PPID: OR 1.66; controls: OR 1.15) for severe leukocyte infiltration in the PDL. PPID was not significantly associated with increased LI. The cementum bordering the soft tissue in interdental locations showed four times more irregularities in PPID affected horses than in controls which predisposes for interdental food impaction and periodontal diseases. Discussion In summary, multifocal to coalescing leukocytes and irregular cementum are seen more often in PPID than in controls - however our findings mainly reflect an association of older age with periodontal disease.
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Affiliation(s)
- Anne Maria Zapf
- Equine Clinic, Internal Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University, Giessen, Germany,*Correspondence: Anne Maria Zapf ✉
| | - Kerstin Fey
- Equine Clinic, Internal Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University, Giessen, Germany
| | - Kathrin Büttner
- Unit for Biomathematics and Data Processing, Faculty of Veterinary Medicine, Justus-Liebig-University, Giessen, Germany
| | - Manuela Gröf
- Faculty of Veterinary Medicine, Institute of Veterinary Pathology, Justus-Liebig-University, Giessen, Germany
| | - Carsten Staszyk
- Faculty of Veterinary Medicine, Institute of Veterinary-Anatomy, Histology, and Embryology, Justus-Liebig-University, Giessen, Germany
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Gopinathan G, Luan X, Diekwisch TGH. Epigenetic Repression of RUNX2 and OSX Promoters Controls the Nonmineralized State of the Periodontal Ligament. Genes (Basel) 2023; 14:201. [PMID: 36672941 PMCID: PMC9858805 DOI: 10.3390/genes14010201] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023] Open
Abstract
The nonmineralized state of the mammalian periodontal ligament is one of the hallmarks of vertebrate evolution as it provides resilient and nontraumatic tooth anchorage for effective predation. Here we sought to determine how the chromatin state of key mineralization gene promoters contributes to the nonmineralized periodontal ligament in the midst of fully mineralized alveolar bone and cementum anchor tissues. In developing mouse periodontal tissues, RUNX2 was localized to alveolar bone-lining cells, while OSX was localized throughout the periodontal ligament's soft tissue. Matching RT-PCR amplification data and western blot comparisons demonstrated that the expression of RUNX2 and OSX bone mineralization transcription factors was at least 2.5-fold elevated in alveolar bone osteoblasts versus periodontal ligament fibroblasts. ChIP enrichment data along the RUNX2 and OSX promoters revealed increased H3K4me3 marks in alveolar bone osteoblasts, while H3K9me3 and H3K27me3 marks were elevated in periodontal ligament fibroblasts. In support of an epigenetic mechanism responsible for the inhibition of mineralization gene expression in periodontal progenitors, histone methylation inhibitors DZNep and Chaetocin reactivated RUNX2 and OSX expression in periodontal progenitors and increased alkaline phosphatase and Alizarin Red, while the in vivo application of DZNep in rat maxillae resulted in aberrant mineralization in the periodontal ligament and a narrowing of the nonmineralized periodontal space. Together, these studies demonstrate that the nonmineralized state of the mammalian periodontal ligament is controlled by an epigenetic regulation of the RUNX2 and OSX key mineralization gene promoters.
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Affiliation(s)
- Gokul Gopinathan
- Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX 75246, USA
| | - Xianghong Luan
- Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX 75246, USA
| | - Thomas G. H. Diekwisch
- Department of Oral and Craniofacial Sciences, University of Rochester School of Medicine and Dentistry, 625 Elmwood Avenue, Rochester, NY 14620, USA
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Fraser D, Ganesan SM. Microbiome, alveolar bone, and metabolites: Connecting the dots. FRONTIERS IN DENTAL MEDICINE 2023. [DOI: 10.3389/fdmed.2022.1074339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The oral microbiome (OM) is a diverse and dynamic collection of species, separated from alveolar bone by the oral mucosa. Pathogenic shifts in the OM (dysbiosis) during periodontitis are associated with an inflammatory response in the oral mucosa that drives alveolar bone resorption. Alveolar bone is also affected by metabolic disorders such as osteoporosis. Accumulating evidence has linked another microbial community, the gut microbiome (GM), to systemic bone metabolism and osteoporosis. Underlying this connection is the biologic activity of metabolites, byproducts of host and bacterial activity. Limited evidence also suggests that metabolites in the oral cavity signal between the OM and immune system, influencing both alveolar bone homeostasis and pathologic bone destruction in periodontitis. While the oral cavity and gut are connected through the gastrointestinal tract, dissimilar roles for known metabolites between these two niches exemplify the difficulty in translating knowledge on gut-derived metabolites and bone metabolism to alveolar bone. Integrated metabolomic, transcriptomic, and metagenomic approaches hold promise for resolving these challenges and identifying novel metabolites which impact alveolar bone health. Further interrogation through mechanistic testing in pre-clinical models and carefully controlled clinical studies have potential to lead toward translation of these discoveries into meaningful therapies.
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Decellularized Matrix Induced Spontaneous Odontogenic and Osteogenic Differentiation in Periodontal Cells. Biomolecules 2023; 13:biom13010122. [PMID: 36671506 PMCID: PMC9855832 DOI: 10.3390/biom13010122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/29/2022] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
The regeneration of periodontal tissues is a decisive factor in the treatment of periodontitis. Currently, to achieve complete periodontal regeneration, many studies have evaluated the effectiveness of decellularized tissue-engineered constructs on periodontal regeneration. We studied the possibilities of osteogenic and odontogenic differentiation of periodontal progenitor and stem cells (SCs) of the periosteum and periodontal ligament, in decellularized tooth matrix (dTM) and periodontal ligament (dPDL), in 2D and 3D culture. The cell culture of periodontal cells without decellularized matrices was used as control. On the 14th day of cultivation of PDLSCs, PSCs, and PDLSCs + PSCs on dTM and/or dPDL scaffolds in 2D conditions, in all scaffold variants, a dense monolayer of spindle-shaped cells was intensely stained for markers of osteogenic differentiation, such as osteopontin and osteocalcin. Periodontal cells in the collagen I hydrogel (3D-dimensional culture) were more diverse in shape and, in combination of dTM and dPDL, in addition to osteogenic expression, expressed dentin sialophosphoprotein, an odontogenic differentiation marker. Thus, collagen I hydrogel contributed to the formation of conditions similar to those in vivo, and the combination of dTM with dPDL apparently formed a microenvironment that promoted osteogenic and odontogenic differentiation of periodontal cells.
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Nango H, Ohtani M. S-1-propenyl-L-cysteine suppresses lipopolysaccharide-induced expression of matrix metalloproteinase-1 through inhibition of tumor necrosis factor-α converting enzyme-epidermal growth factor receptor axis in human gingival fibroblasts. PLoS One 2023; 18:e0284713. [PMID: 37083725 PMCID: PMC10121056 DOI: 10.1371/journal.pone.0284713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 04/05/2023] [Indexed: 04/22/2023] Open
Abstract
Periodontal disease is the most common dental health problem characterized by the destruction of connective tissue and the resorption of alveolar bone resulting from a chronic infection associated with pathogenic bacteria in the gingiva. Aged garlic extract has been reported to improve gingival bleeding index and probing pocket depth score in patients with mild to moderate periodontitis. Although our previous study found that aged garlic extract and its constituents suppressed the tumor necrosis factor-α-induced inflammatory responses in a human gingival epithelial cell line, the mechanism underlying the effect of aged garlic extract on the destruction of the gingiva remains unclear. The present study investigated the effect of S-1-propenyl-L-cysteine, one of the major sulfur bioactive compounds in aged garlic extract, on the lipopolysaccharide-induced expression of matrix metalloproteinases in human gingival fibroblasts HGF-1 cells. Matrix metalloproteinases are well known to be closely related to the destruction of the gingiva. We found that S-1-propenyl-L-cysteine suppressed the lipopolysaccharide-induced expression and secretion of matrix metalloproteinase-1 in HGF-1 cells. In addition, S-1-propenyl-L-cysteine inhibited the lipopolysaccharide-induced phosphorylation of epidermal growth factor receptor and expression of the active form of tumor necrosis factor-α converting enzyme. Furthermore, the inhibitors of epidermal growth factor receptor tyrosine kinase and tumor necrosis factor-α converting enzyme, AG-1478 and TAPI-1, respectively, reduced the lipopolysaccharide-induced protein level of matrix metalloproteinase-1, as did S-1-propenyl-L-cysteine. Taken together, these results suggested that S-1-propenyl-L-cysteine suppresses the lipopolysaccharide-induced expression of matrix metalloproteinase-1 through the blockade of the tumor necrosis factor-α converting enzyme-epidermal growth factor receptor axis in gingival fibroblasts.
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Affiliation(s)
- Hiroshi Nango
- Central Research Institute, Wakunaga Pharmaceutical Co., Ltd., Akitakata, Hiroshima, Japan
| | - Masahiro Ohtani
- Central Research Institute, Wakunaga Pharmaceutical Co., Ltd., Akitakata, Hiroshima, Japan
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Jepsen K, Jervøe-Storm PM, Henrichs I, Lensing I, Müller AL, Cosgarea R, Keilig L, Bourauel C, Jepsen S. Biomechanical properties of periodontal tissues in non-periodontitis and periodontitis patients assessed with an intraoral computerized electronic measurement device. Clin Oral Investig 2023; 27:797-805. [PMID: 36625961 PMCID: PMC9889448 DOI: 10.1007/s00784-023-04859-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 12/28/2022] [Indexed: 01/11/2023]
Abstract
OBJECTIVE To identify tooth mobility (TM) by time-dependent tooth displacement using an electronic intra-oral loading device (ILD) in periodontally healthy and periodontally compromised patients. MATERIALS AND METHODS Twenty-eight untreated periodontitis and 20 periodontally healthy patients [25 female and 26 male; ages: 20-81 years], contributing with 68 teeth (periodontitis: nteeth = 28; non-periodontitis: nteeth = 40), participated in the study. TM was measured in vivo by displacing central or lateral incisors to a maximum of 0.2 mm orally over durations of 0.5 s, 1 s, and 10 s with the ILD. The maximum force (Fmax) was extracted from the measured force/deflection curves for every single measurement. RESULTS Differences in TM-ILD values were found for periodontitis as compared to non-periodontitis patients derived from the same loading durations (differences of 3.9 (0.5 s), 3.1 (1 s), 2.8 (10 s), (95% CI for 0.5 s (1.2-6.7), p = 0.024; 1 s (1.4-6.0), p = 0.067; 10 s (0.2-5.3), p = 0.001), rejecting the null hypothesis of no difference (T-test) for durations of 0.5 and 10 s. There was a significant correlation of TM-ILD (Fmax) with BOP at 0.5 s (- 0.52) and with attachment loss at all time durations (- 0.47 at 0.5 s; - 0.57 at 1 s; - 0.47 at 10 s). CONCLUSIONS This clinical investigation could demonstrate that time-dependent tooth displacements using a new computerized electronic device were associated with attachment loss and bleeding on probing. CLINICAL RELEVANCE ILD can improve the monitoring of tooth mobility, as TM-ILD values reflect qualitative (inflammatory status interpreted by BOP) and quantitative parameters (interpreted as the amount of CAL loss) of periodontal disease.
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Affiliation(s)
- Karin Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University Hospital Bonn, Welschnonnenstrasse 17, 53111, Bonn, Germany.
| | - Pia-Merete Jervøe-Storm
- Department of Periodontology, Operative and Preventive Dentistry, University Hospital Bonn, Welschnonnenstrasse 17, 53111, Bonn, Germany
| | - Isabel Henrichs
- Department of Periodontology, Operative and Preventive Dentistry, University Hospital Bonn, Welschnonnenstrasse 17, 53111, Bonn, Germany
| | - Ina Lensing
- Department of Periodontology, Operative and Preventive Dentistry, University Hospital Bonn, Welschnonnenstrasse 17, 53111, Bonn, Germany
| | - Alja Larissa Müller
- Department of Periodontology, Operative and Preventive Dentistry, University Hospital Bonn, Welschnonnenstrasse 17, 53111, Bonn, Germany
| | - Raluca Cosgarea
- Department of Periodontology, Operative and Preventive Dentistry, University Hospital Bonn, Welschnonnenstrasse 17, 53111, Bonn, Germany
- Clinic for Periodontology and Peri-Implant Diseases, Philipps University Marburg, Marburg, Germany
- Clinic of Prosthodontics, Iuliu Hatieganu University Cluj-Napoca, Cluj-Napoca-Napoca, Romania
| | - Ludger Keilig
- Oral Technology, University Hospital Bonn, Bonn, Germany
- Department of Dental Prosthetics, Propaedeutics and Materials Science, University Hospital Bonn, Bonn, Germany
| | | | - Søren Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University Hospital Bonn, Welschnonnenstrasse 17, 53111, Bonn, Germany
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Makkar H, Zhou Y, Tan KS, Lim CT, Sriram G. Modeling Crevicular Fluid Flow and Host-Oral Microbiome Interactions in a Gingival Crevice-on-Chip. Adv Healthc Mater 2023; 12:e2202376. [PMID: 36398428 DOI: 10.1002/adhm.202202376] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 11/07/2022] [Indexed: 11/21/2022]
Abstract
Gingival crevice and gingival crevicular fluid (GCF) flow play a crucial role at the gingiva-oral microbiome interface which contributes toward maintaining the balance between gingival health and periodontal disease. Interstitial flow of GCF strongly impacts the host-microbiome interactions and tissue responses. However, currently available in vitro preclinical models largely disregard the dynamic nature of gingival crevicular microenvironment, thus limiting the progress in the development of periodontal therapeutics. Here, a proof-of-principle "gingival crevice-on-chip" microfluidic platform to culture gingival connective tissue equivalent (CTE) under dynamic interstitial fluid flow mimicking the GCF is described. On-chip co-culture using oral symbiont (Streptococcus oralis) shows the potential to recapitulate microbial colonization, formation of biofilm-like structures at the tissue-microbiome interface, long-term co-culture, and bacterial clearance secondary to simulated GCF (s-GCF) flow. Further, on-chip exposure of the gingival CTEs to the toll-like receptor-2 (TLR-2) agonist or periodontal pathogen Fusobacterium nucleatum demonstrates the potential to mimic early gingival inflammation. In contrast to direct exposure, the induction of s-GCF flow toward the bacterial front attenuates the secretion of inflammatory mediators demonstrating the protective effect of GCF flow. This proposed in vitro platform offers the potential to study complex host-microbe interactions in periodontal disease and the development of periodontal therapeutics under near-microphysiological conditions.
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Affiliation(s)
- Hardik Makkar
- Faculty of Dentistry, National University of Singapore, Singapore, 119085, Singapore
| | - Ying Zhou
- Institute for Health Innovation and Technology (iHealthtech), National University of Singapore, Singapore, 117599, Singapore
| | - Kai Soo Tan
- Faculty of Dentistry, National University of Singapore, Singapore, 119085, Singapore.,ORCHIDS: Oral Care Health Innovations and Designs Singapore, National University of Singapore, Singapore, 119085, Singapore
| | - Chwee Teck Lim
- Institute for Health Innovation and Technology (iHealthtech), National University of Singapore, Singapore, 117599, Singapore.,Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore.,Mechanobiology Institute, National University of Singapore, Singapore, 117411, Singapore
| | - Gopu Sriram
- Faculty of Dentistry, National University of Singapore, Singapore, 119085, Singapore.,ORCHIDS: Oral Care Health Innovations and Designs Singapore, National University of Singapore, Singapore, 119085, Singapore
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Liu S, Yang H, Zhang L, Bianco A, Ma B, Ge S. Multifunctional barrier membranes promote bone regeneration by scavenging H2O2, generating O2, eliminating inflammation, and regulating immune response. Colloids Surf B Biointerfaces 2023. [DOI: 10.1016/j.colsurfb.2023.113147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Prevalence of Microorganisms in Atherosclerotic Plaques of Coronary Arteries: A Systematic Review and Meta-Analysis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:8678967. [PMID: 36506809 PMCID: PMC9731758 DOI: 10.1155/2022/8678967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 07/05/2022] [Indexed: 12/02/2022]
Abstract
Background In this systematic review and meta-analysis, the existence of pathogens in atherosclerotic plaques of coronary arteries was investigated in coronary arteries diseases (CAD) patients. Methods This study was designed and implemented up to 31 August 2020. The findings present according to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) checklist. Two independent reviewers (I.RJ and S.H) performed a comprehensive search on four different English databases including PubMed, ISI, Scopus, and Embase. In order to assess the quality of the articles, a checklist prepared by The Joanna Briggs Institute (JBI) was used. Results Finally, 44 studies were selected. The prevalence of different microorganisms in coronary arteries were as follows: Aggregatibacter actinomycetemcomitans (46.2%), Campylobacter rectus (43.0%), Chlamydia pneumonia (42.8%), Cytomegalovirus (29.1%), Helicobacter pylori (18.9%), Herpes simplex virus type 1 (5.9%), Porphyromonas gingivalis (42.6%), Prevotella intermedia (47.6%), Tannerella forsythia (43.7%), and Treponema denticola (32.9%). Conclusion Based on the result of this meta-analysis, Prevotella intermedia and Aggregatibacter actinomycetemcomitans are the most common microorganisms in atherosclerotic plaques of coronary arteries and may have an important role in the development of atherosclerosis.
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Fischer NG, Aparicio C. Junctional epithelium and hemidesmosomes: Tape and rivets for solving the "percutaneous device dilemma" in dental and other permanent implants. Bioact Mater 2022; 18:178-198. [PMID: 35387164 PMCID: PMC8961425 DOI: 10.1016/j.bioactmat.2022.03.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/14/2022] [Accepted: 03/12/2022] [Indexed: 02/06/2023] Open
Abstract
The percutaneous device dilemma describes etiological factors, centered around the disrupted epithelial tissue surrounding non-remodelable devices, that contribute to rampant percutaneous device infection. Natural percutaneous organs, in particular their extracellular matrix mediating the "device"/epithelium interface, serve as exquisite examples to inspire longer lasting long-term percutaneous device design. For example, the tooth's imperviousness to infection is mediated by the epithelium directly surrounding it, the junctional epithelium (JE). The hallmark feature of JE is formation of hemidesmosomes, cell/matrix adhesive structures that attach surrounding oral gingiva to the tooth's enamel through a basement membrane. Here, the authors survey the multifaceted functions of the JE, emphasizing the role of the matrix, with a particular focus on hemidesmosomes and their five main components. The authors highlight the known (and unknown) effects dental implant - as a model percutaneous device - placement has on JE regeneration and synthesize this information for application to other percutaneous devices. The authors conclude with a summary of bioengineering strategies aimed at solving the percutaneous device dilemma and invigorating greater collaboration between clinicians, bioengineers, and matrix biologists.
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Affiliation(s)
- Nicholas G. Fischer
- MDRCBB-Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota, 16-212 Moos Tower, 515 Delaware St. SE, Minneapolis, MN, 55455, USA
| | - Conrado Aparicio
- MDRCBB-Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota, 16-212 Moos Tower, 515 Delaware St. SE, Minneapolis, MN, 55455, USA
- Division of Basic Research, Faculty of Odontology, UIC Barcelona – Universitat Internacional de Catalunya, C/. Josep Trueta s/n, 08195, Sant Cugat del Valles, Barcelona, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), C/. Baldiri Reixac 10-12, 08028, Barcelona, Spain
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