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Li XL, Fan W, Fan B. Dental pulp regeneration strategies: A review of status quo and recent advances. Bioact Mater 2024; 38:258-275. [PMID: 38745589 PMCID: PMC11090883 DOI: 10.1016/j.bioactmat.2024.04.031] [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: 11/27/2023] [Revised: 02/18/2024] [Accepted: 04/28/2024] [Indexed: 05/16/2024] Open
Abstract
Microorganisms, physical factors such as temperature or mechanical injury, and chemical factors such as free monomers from composite resin are the main causes of dental pulp diseases. Current clinical treatment methods for pulp diseases include the root canal therapy, vital pulp therapy and regenerative endodontic therapy. Regenerative endodontic therapy serves the purpose of inducing the regeneration of new functional pulp tissues through autologous revascularization or pulp tissue engineering. This article first discusses the current clinical methods and reviews strategies as well as the research outcomes regarding the pulp regeneration. Then the in vivo models, the prospects and challenges for regenerative endodontic therapy were further discussed.
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Affiliation(s)
- Xin-Lu Li
- The State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, 430079, Wuhan, China
| | - Wei Fan
- The State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, 430079, Wuhan, China
| | - Bing Fan
- The State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, 430079, Wuhan, China
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2
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Macalester W, Boussahel A, Moreno-Tortolero RO, Shannon MR, West N, Hill D, Perriman A. A 3D In-vitro model of the human dentine interface shows long-range osteoinduction from the dentine surface. Int J Oral Sci 2024; 16:37. [PMID: 38734663 PMCID: PMC11088668 DOI: 10.1038/s41368-024-00298-9] [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: 10/12/2023] [Revised: 03/18/2024] [Accepted: 03/18/2024] [Indexed: 05/13/2024] Open
Abstract
Emerging regenerative cell therapies for alveolar bone loss have begun to explore the use of cell laden hydrogels for minimally invasive surgery to treat small and spatially complex maxilla-oral defects. However, the oral cavity presents a unique and challenging environment for in vivo bone tissue engineering, exhibiting both hard and soft periodontal tissue as well as acting as key biocenosis for many distinct microbial communities that interact with both the external environment and internal body systems, which will impact on cell fate and subsequent treatment efficacy. Herein, we design and bioprint a facile 3D in vitro model of a human dentine interface to probe the effect of the dentine surface on human mesenchymal stem cells (hMSCs) encapsulated in a microporous hydrogel bioink. We demonstrate that the dentine substrate induces osteogenic differentiation of encapsulated hMSCs, and that both dentine and β-tricalcium phosphate substrates stimulate extracellular matrix production and maturation at the gel-media interface, which is distal to the gel-substrate interface. Our findings demonstrate the potential for long-range effects on stem cells by mineralized surfaces during bone tissue engineering and provide a framework for the rapid development of 3D dentine-bone interface models.
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Affiliation(s)
- William Macalester
- School of Cellular and Molecular Medicine, Biomedical Sciences Building, University of Bristol, University Walk, Bristol, United Kingdom
- Bristol Centre for Functional Nanomaterials, HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, United Kingdom
| | - Asme Boussahel
- School of Cellular and Molecular Medicine, Biomedical Sciences Building, University of Bristol, University Walk, Bristol, United Kingdom.
| | - Rafael O Moreno-Tortolero
- Bristol Centre for Functional Nanomaterials, HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, United Kingdom
- Centre for Protolife Research, School of Chemistry, University of Bristol, Cantocks Close, Bristol, United Kingdom
- Max Planck-Bristol Centre for Minimal Biology, School of Chemistry, University of Bristol, Bristol, United Kingdom
| | - Mark R Shannon
- School of Cellular and Molecular Medicine, Biomedical Sciences Building, University of Bristol, University Walk, Bristol, United Kingdom
| | - Nicola West
- Periodontology, Bristol Dental School, University of Bristol, Lower Maudlin Street, Bristol, United Kingdom
| | - Darryl Hill
- School of Cellular and Molecular Medicine, Biomedical Sciences Building, University of Bristol, University Walk, Bristol, United Kingdom
| | - Adam Perriman
- School of Cellular and Molecular Medicine, Biomedical Sciences Building, University of Bristol, University Walk, Bristol, United Kingdom.
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3
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Zhang H, Li L, Wang S, Sun X, Luo C, Hou B. Construction of dentin-on-a-chip based on microfluidic technology and tissue engineering. J Dent 2024; 146:105028. [PMID: 38719135 DOI: 10.1016/j.jdent.2024.105028] [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: 02/05/2024] [Revised: 04/23/2024] [Accepted: 04/25/2024] [Indexed: 05/19/2024] Open
Abstract
AIM Three-dimensional (3D) cell culture systems perform better in resembling tissue or organism structures compared with traditional 2D models. Organs-on-chips (OoCs) are becoming more efficient 3D models. This study aimed to create a novel simplified dentin-on-a-chip using microfluidic chip technology and tissue engineering for screening dental materials. METHODOLOGY A microfluidic device with three channels was designed for creating 3D dental tissue constructs using stem cells from the apical papilla (SCAP) and gelatin methacrylate (GelMA). The study investigated the effect of varying cell densities and GelMA concentrations on the layer features formed within the microfluidic chip. Cell viability and distribution were evaluated through live/dead staining and nuclei/F-actin staining. The osteo/odontogenic potential was assessed through ALP staining and Alizarin red staining. The impact of GelMA concentrations (5 %, 10 %) on the osteo/odontogenic differentiation trajectory of SCAP was also studied. RESULTS The 3D tissue constructs maintained high viability and favorable spreading within the microfluidic chip for 3-7 days. A cell seeding density of 2 × 104 cells/μL was found to be the most optimal choice, ensuring favorable cell proliferation and even distribution. GelMA concentrations of 5 % and 10 % proved to be most effective for promoting cell growth and uniform distribution. Within the 5 % GelMA group, SCAP demonstrated higher osteo/odontogenic differentiation than that in the 10 % GelMA group. CONCLUSION In 3D culture, GelMA concentration was found to regulate the osteo/odontogenic differentiation of SCAP. The study recommends a seeding density of 2 × 104 cells/μL of SCAP within 5 % GelMA for constructing simplified dentin-on-a-chip. CLINICAL SIGNIFICANCE This study built up the 3D culture protocol, and induced odontogenic differentiation of SCAP, thus forming the simplified dentin-on-a-chip and paving the way to be used as a well-defined biological model for regenerative endodontics. It may serve as a potential testing platform for cell differentiation.
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Affiliation(s)
- Hexuan Zhang
- Center for Microscope Enhanced Dentistry, School of Stomatology, Capital Medical University, Beijing 100162, PR China; Department of Endodontics and Operative Dentistry, School of Stomatology, Capital Medical University, Beijing 100050, PR China
| | - Lingjun Li
- Wenzhou Institute University of Chinese Academy of Sciences, Wenzhou 325001, PR China.
| | - Shujing Wang
- Wenzhou Institute University of Chinese Academy of Sciences, Wenzhou 325001, PR China
| | - Xiaoqiang Sun
- Department of Endodontics and Operative Dentistry, School of Stomatology, Capital Medical University, Beijing 100050, PR China
| | - Chunxiong Luo
- Wenzhou Institute University of Chinese Academy of Sciences, Wenzhou 325001, PR China; The State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, PR China.
| | - Benxiang Hou
- Center for Microscope Enhanced Dentistry, School of Stomatology, Capital Medical University, Beijing 100162, PR China.
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4
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Rahimnejad M, Makkar H, Dal-Fabbro R, Malda J, Sriram G, Bottino MC. Biofabrication Strategies for Oral Soft Tissue Regeneration. Adv Healthc Mater 2024:e2304537. [PMID: 38529835 DOI: 10.1002/adhm.202304537] [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: 12/19/2023] [Revised: 03/01/2024] [Indexed: 03/27/2024]
Abstract
Gingival recession, a prevalent condition affecting the gum tissues, is characterized by the exposure of tooth root surfaces due to the displacement of the gingival margin. This review explores conventional treatments, highlighting their limitations and the quest for innovative alternatives. Importantly, it emphasizes the critical considerations in gingival tissue engineering leveraging on cells, biomaterials, and signaling factors. Successful tissue-engineered gingival constructs hinge on strategic choices such as cell sources, scaffold design, mechanical properties, and growth factor delivery. Unveiling advancements in recent biofabrication technologies like 3D bioprinting, electrospinning, and microfluidic organ-on-chip systems, this review elucidates their precise control over cell arrangement, biomaterials, and signaling cues. These technologies empower the recapitulation of microphysiological features, enabling the development of gingival constructs that closely emulate the anatomical, physiological, and functional characteristics of native gingival tissues. The review explores diverse engineering strategies aiming at the biofabrication of realistic tissue-engineered gingival grafts. Further, the parallels between the skin and gingival tissues are highlighted, exploring the potential transfer of biofabrication approaches from skin tissue regeneration to gingival tissue engineering. To conclude, the exploration of innovative biofabrication technologies for gingival tissues and inspiration drawn from skin tissue engineering look forward to a transformative era in regenerative dentistry with improved clinical outcomes.
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Affiliation(s)
- Maedeh Rahimnejad
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Hardik Makkar
- Faculty of Dentistry, National University of Singapore, Singapore, 119085, Singapore
| | - Renan Dal-Fabbro
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Jos Malda
- Regenerative Medicine Center Utrecht, Utrecht, 3584, The Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, 3584, The Netherlands
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, 3584, The Netherlands
| | - Gopu Sriram
- Faculty of Dentistry, National University of Singapore, Singapore, 119085, Singapore
- NUS Centre for Additive Manufacturing (AM.NUS), National University of Singapore, Singapore, 117597, Singapore
- Department of Biomedical Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - Marco C Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, 48109, USA
- Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
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Pierfelice TV, D'Amico E, Petrini M, Romano M, D'Arcangelo C, Sbordone L, Barone A, Plebani R, Iezzi G. A Systematic Review on Organ-on-a-Chip in PDMS or Hydrogel in Dentistry: An Update of the Literature. Gels 2024; 10:102. [PMID: 38391432 PMCID: PMC10887950 DOI: 10.3390/gels10020102] [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: 01/02/2024] [Revised: 01/19/2024] [Accepted: 01/24/2024] [Indexed: 02/24/2024] Open
Abstract
Organs-on-a-chip (OoCs) are microfluidic devices constituted by PDMS or hydrogel in which different layers of cells are separated by a semipermeable membrane. This technology can set many parameters, like fluid shear stress, chemical concentration gradient, tissue-organ interface, and cell interaction. The use of these devices in medical research permits the investigation of cell patterning, tissue-material interface, and organ-organ interaction, mimicking the complex structures and microenvironment of human and animal bodies. This technology allows us to reconstitute in vitro complex conditions that recapitulate in vivo environments. One of the main advantages of these systems is that they represent a very realistic model that, in many cases, can replace animal experimentation, eliminating costs and related ethical issues. Organ-on-a-chip can also contain bacteria or cancer cells. This technology could be beneficial in dentistry for testing novel antibacterial substances and biomaterials, performing studies on inflammatory disease, or planning preclinical studies. A significant number of publications and reviews have been published on this topic. Still, to our knowledge, they mainly focus on the materials used for fabrication and the different patterns of the chip applied to the experimentations. This review presents the most recent applications of organ-on-a-chip models in dentistry, starting from the reconstituted dental tissues to their clinical applications and future perspectives.
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Affiliation(s)
- Tania Vanessa Pierfelice
- Department of Medical, Oral and Biotechnological Sciences, University G. d'Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Emira D'Amico
- Department of Medical, Oral and Biotechnological Sciences, University G. d'Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Morena Petrini
- Department of Medical, Oral and Biotechnological Sciences, University G. d'Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Mario Romano
- Department of Medical, Oral and Biotechnological Sciences, University G. d'Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Camillo D'Arcangelo
- Department of Medical, Oral and Biotechnological Sciences, University G. d'Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Ludovico Sbordone
- Department of Medicine and Health Sciences "V. Tiberio", University of Molise, 86100 Campobasso, Italy
| | - Antonio Barone
- Department of Surgical, Medical, Molecular Pathologies and of the Critical Needs, School of Dentistry, University of Pisa, 56126 Pisa, Italy
- Complex Unit of Stomatology and Oral Surgery, University Hospital of Pisa, 56126 Pisa, Italy
| | - Roberto Plebani
- Department of Medical, Oral and Biotechnological Sciences, University G. d'Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Giovanna Iezzi
- Department of Medical, Oral and Biotechnological Sciences, University G. d'Annunzio of Chieti-Pescara, 66100 Chieti, Italy
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Wang C, Liu X, Zhou J, Zhang Q. The Role of Sensory Nerves in Dental Pulp Homeostasis: Histological Changes and Cellular Consequences after Sensory Denervation. Int J Mol Sci 2024; 25:1126. [PMID: 38256202 PMCID: PMC10815945 DOI: 10.3390/ijms25021126] [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: 12/20/2023] [Revised: 01/10/2024] [Accepted: 01/13/2024] [Indexed: 01/24/2024] Open
Abstract
Homeostatic maintenance is essential for pulp function. Disrupting pulp homeostasis may lead to pulp degeneration, such as fibrosis and calcifications. Sensory nerves constitute a crucial component of the dental pulp. However, the precise involvement of sensory nerves in pulp homeostasis remains uncertain. In this study, we observed the short-term and long-term histological changes in the dental pulp after inferior alveolar nerve transection. Additionally, we cultured primary dental pulp cells (DPCs) from the innervated and denervated groups and compared indicators of cellular senescence and cellular function. The results revealed that pulp fibrosis occurred at 2 w after the operation. Furthermore, the pulp area, as well as the height and width of the pulp cavity, showed accelerated reductions after sensory denervation. Notably, the pulp area at 16 w after the operation was comparable to that of 56 w old rats. Sensory denervation induced excessive extracellular matrix (ECM) deposition and increased predisposition to mineralization. Furthermore, sensory denervation promoted the senescence of DPCs. Denervated DPCs exhibited decelerated cell proliferation, arrest in the G2/M phase of the cell cycle, imbalance in the synthesis and degradation of ECM, and enhanced mineralization. These findings indicate that sensory nerves play an essential role in pulp homeostasis maintenance and dental pulp cell fate decisions, which may provide novel insights into the prevention of pulp degeneration.
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Affiliation(s)
| | | | | | - Qi Zhang
- Department of Endodontics, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, No.399 Yanchang Middle Road, Jing’an District, Shanghai 200072, China
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Ardila CM, Jiménez-Arbeláez GA, Vivares-Builes AM. The Potential Clinical Applications of a Microfluidic Lab-on-a-Chip for the Identification and Antibiotic Susceptibility Testing of Enterococcus faecalis-Associated Endodontic Infections: A Systematic Review. Dent J (Basel) 2023; 12:5. [PMID: 38248213 PMCID: PMC10814515 DOI: 10.3390/dj12010005] [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: 11/13/2023] [Revised: 12/12/2023] [Accepted: 12/20/2023] [Indexed: 01/23/2024] Open
Abstract
This systematic review evaluated the potential clinical use of microfluidic lab-on-a-chip (LOC) technology in the identification and antibiotic susceptibility testing of E. faecalis in endodontic infections. The search methodology employed in this review adhered to the PRISMA guidelines. Multiple scientific databases, including PubMed/MEDLINE, SCOPUS, and SCIELO, were utilized, along with exploration of grey literature sources. Up to September 2023, these resources were searched using specific keywords and MeSH terms. An initial comprehensive search yielded 202 articles. Ultimately, this systematic review incorporated 12 studies. Out of these, seven aimed to identify E. faecalis, while the remaining five evaluated its susceptibility to different antibiotics. All studies observed that the newly developed microfluidic chip significantly reduces detection time compared to traditional methods. This enhanced speed is accompanied by a high degree of accuracy, efficiency, and sensitivity. Most research findings indicated that the entire process took anywhere from less than an hour to five hours. It is important to note that this approach bypasses the need for minimum inhibitory concentration measurements, as it does not rely on traditional methodologies. Microfluidic devices enable the rapid identification and accurate antimicrobial susceptibility testing of E. faecalis, which are crucial for timely diagnosis and treatment in endodontic infections.
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Affiliation(s)
- Carlos M. Ardila
- Basic Studies Department, School of Dentistry, Universidad de Antioquia UdeA, Medellín 050010, Colombia
| | - Gustavo A. Jiménez-Arbeláez
- School of Dentistry, University Institution Visión de Las Américas, Medellín 050031, Colombia; (G.A.J.-A.); (A.M.V.-B.)
| | - Annie Marcela Vivares-Builes
- School of Dentistry, University Institution Visión de Las Américas, Medellín 050031, Colombia; (G.A.J.-A.); (A.M.V.-B.)
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8
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Syahruddin MH, Anggraeni R, Ana ID. A microfluidic organ-on-a-chip: into the next decade of bone tissue engineering applied in dentistry. Future Sci OA 2023; 9:FSO902. [PMID: 37753360 PMCID: PMC10518836 DOI: 10.2144/fsoa-2023-0061] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 08/21/2023] [Indexed: 09/28/2023] Open
Abstract
A comprehensive understanding of the complex physiological and pathological processes associated with alveolar bones, their responses to different therapeutics strategies, and cell interactions with biomaterial becomes necessary in precisely treating patients with severe progressive periodontitis, as a bone-related issue in dentistry. However, existing monolayer cell culture or pre-clinical models have been unable to mimic the complex physiological, pathological and regeneration processes in the bone microenvironment in response to different therapeutic strategies. In this point, 'organ-on-a-chip' (OOAC) technology, specifically 'alveolar-bone-on-a-chip', is expected to resolve the problems by better imitating infection site microenvironment and microphysiology within the oral tissues. The OOAC technology is assessed in this study toward better approaches in disease modeling and better therapeutics strategy for bone tissue engineering applied in dentistry.
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Affiliation(s)
- Muhammad Hidayat Syahruddin
- Postgraduate Student, Dental Science Doctoral Study Program, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
| | - Rahmi Anggraeni
- Research Center for Preclinical & Clinical Medicine, National Research & Innovation Agency of the Republic of Indonesia, Cibinong Science Center, Bogor, 16915, Indonesia
- Research Collaboration Center for Biomedical Scaffolds, National Research & Innovation Agency (BRIN) – Universitas Gadjah Mada (UGM), Yogyakarta, 55281, Indonesia
| | - Ika Dewi Ana
- Department of Dental Biomedical Sciences, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
- Research Collaboration Center for Biomedical Scaffolds, National Research & Innovation Agency (BRIN) – Universitas Gadjah Mada (UGM), Yogyakarta, 55281, Indonesia
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9
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Muniraj G, Tan RHS, Dai Y, Wu R, Alberti M, Sriram G. Microphysiological Modeling of Gingival Tissues and Host-Material Interactions Using Gingiva-on-Chip. Adv Healthc Mater 2023; 12:e2301472. [PMID: 37758297 DOI: 10.1002/adhm.202301472] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 09/14/2023] [Indexed: 10/03/2023]
Abstract
Gingiva plays a crucial barrier role at the interface of teeth, tooth-supporting structures, microbiome, and external agents. To mimic this complex microenvironment, an in vitro microphysiological platform and biofabricated full-thickness gingival equivalents (gingiva-on-chip) within a vertically stacked microfluidic device is developed. This design allowed long-term and air-liquid interface culture, and host-material interactions under flow conditions. Compared to static cultures, dynamic cultures on-chip enabled the biofabrication of gingival equivalents with stable mucosal matrix, improved epithelial morphogenesis, and barrier features. Additionally, a diseased state with disrupted barrier function representative of gingival/oral mucosal ulcers is modeled. The apical flow feature is utilized to emulate the mechanical action of mouth rinse and integrate the assessment of host-material interactions and transmucosal permeation of oral-care formulations in both healthy and diseased states. Although the gingiva-on-chip cultures have thicker and more mature epithelium, the flow of oral-care formulations induced increased tissue disruption and cytotoxic features compared to static conditions. The realistic emulation of mouth rinsing action facilitated a more physiological assessment of mucosal irritation potential. Overall, this microphysiological system enables biofabrication of human gingiva equivalents in intact and ulcerated states, providing a miniaturized and integrated platform for downstream host-material and host-microbiome applications in gingival and oral mucosa research.
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Affiliation(s)
- Giridharan Muniraj
- Faculty of Dentistry, National University of Singapore, Singapore, 119085, Singapore
| | - Rachel Hui Shuen Tan
- Singapore Institute of Manufacturing Technology (SIMTech), Agency for Science, Technology and Research (A*STAR), Singapore, 138634, Singapore
| | - Yichen Dai
- Faculty of Dentistry, National University of Singapore, Singapore, 119085, Singapore
| | - Ruige Wu
- Singapore Institute of Manufacturing Technology (SIMTech), Agency for Science, Technology and Research (A*STAR), Singapore, 138634, Singapore
| | - Massimo Alberti
- Singapore Institute of Manufacturing Technology (SIMTech), Agency for Science, Technology and Research (A*STAR), Singapore, 138634, Singapore
- REVIVO BioSystems Pte. Ltd., Singapore, 138623, 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
- NUS Centre for Additive Manufacturing (AM.NUS), National University of Singapore, Singapore, 117602, Singapore
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10
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Xie Y, Chen R, Yao W, Ma L, Li B. Synergistic effect of ion-releasing fillers on the remineralization and mechanical properties of resin-dentin bonding interfaces. Biomed Phys Eng Express 2023; 9:062001. [PMID: 37832527 DOI: 10.1088/2057-1976/ad0300] [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: 07/17/2023] [Accepted: 10/13/2023] [Indexed: 10/15/2023]
Abstract
In modern restorative dentistry, adhesive resin materials are vital for achieving minimally invasive, esthetic, and tooth-preserving restorations. However, exposed collagen fibers are found in the hybrid layer of the resin-dentin bonding interface due to incomplete resin penetration. As a result, the hybrid layer is susceptible to attack by internal and external factors such as hydrolysis and enzymatic degradation, and the durability of dentin bonding remains limited. Therefore, efforts have been made to improve the stability of the resin-dentin interface and achieve long-term clinical success. New ion-releasing adhesive resin materials are synthesized by introducing remineralizing ions such as calcium and phosphorus, which continuously release mineral ions into the bonding interface in resin-bonded restorations to achieve dentin biomimetic remineralization and improve bond durability. As an adhesive resin material capable of biomimetic mineralization, maintaining excellent bond strength and restoring the mechanical properties of demineralized dentin is the key to its function. This paper reviews whether ion-releasing dental adhesive materials can maintain the mechanical properties of the resin-dentin bonding interface by supplementing the various active ingredients required for dentin remineralization from three aspects: phosphate, silicate, and bioactive glass.
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Affiliation(s)
- Yimeng Xie
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, 030001, People's Republic of China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, People's Republic of China
| | - Ruhua Chen
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, 030001, People's Republic of China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, People's Republic of China
| | - Wei Yao
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, 030001, People's Republic of China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, People's Republic of China
| | - Liang Ma
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, 030001, People's Republic of China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, People's Republic of China
| | - Bing Li
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, 030001, People's Republic of China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, People's Republic of China
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11
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Topa-Skwarczyńska M, Jankowska M, Gruchała-Hałat A, Petko F, Galek M, Ortyl J. High-performance photoinitiating systems for new generation dental fillings. Dent Mater 2023; 39:729. [PMID: 37393151 DOI: 10.1016/j.dental.2023.06.003] [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: 12/20/2022] [Revised: 06/10/2023] [Accepted: 06/14/2023] [Indexed: 07/03/2023]
Abstract
OBJECTIVES To obtain new generation dental composites with improved performance properties compared to currently available dental fillings on the market and to determine the influence of new initiating systems on final product parameters such as degree of cure, hardness, color, and shrinkage. METHODS In order to verify the effectiveness of the developed initiating systems, typical spectroscopic, electrochemical, and kinetic studies using the real-time FT-IR method were shown. Moreover, paste dental fillings were prepared, the compositions were irradiated with the dental lamp, and the degrees of cross-linking were measured by Raman spectroscopy. The polymerization shrinkage was also determined using the rheometer. In addition, their hardness was examined on the Shore scale. Finally, the color analysis of the composites in the L*a*b* color space was compared with the VITA CLASSIC colorant. RESULTS It was shown that, due to their excellent spectroscopic and electrochemical properties, new quinazolin-2-one can act as co-initiators in cationic and radical photopolymerization. It was demonstrated that the most effective composite containing the initiator system in the form of 3-SCH3Ph-Q, IOD, MDEA, and an inorganic filler as nanometric silica and a bonding agent is cured more than 90% after just 1 cycle of dental lamp exposure (30 s), the hardness of the composite after curing on the Shor Scale is 82 ± 4, and the polymerization shrinkage is less than 2.8%. SIGNIFICANCE The article demonstrates effective new initiator systems as an alternative to CQ/amine for obtaining new-generation dental composites. The developed dental composites are a big competition to the currently used dental fillings on the market.
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Affiliation(s)
- Monika Topa-Skwarczyńska
- Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Cracow, Poland; Photo4Chem Ltd., Lea 114, 30-133 Cracow, Poland.
| | - Magdalena Jankowska
- Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Cracow, Poland
| | - Alicja Gruchała-Hałat
- Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Cracow, Poland
| | - Filip Petko
- Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Cracow, Poland; Photo HiTech Ltd., Bobrzyńskiego 14, 30-348 Cracow, Poland
| | - Mariusz Galek
- Photo HiTech Ltd., Bobrzyńskiego 14, 30-348 Cracow, Poland
| | - Joanna Ortyl
- Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Cracow, Poland; Photo HiTech Ltd., Bobrzyńskiego 14, 30-348 Cracow, Poland; Photo4Chem Ltd., Lea 114, 30-133 Cracow, Poland.
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12
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Mereness JA, Piraino L, Chen CY, Moyston T, Song Y, Shubin A, DeLouise LA, Ovitt CE, Benoit DSW. Slow hydrogel matrix degradation enhances salivary gland mimetic phenotype. Acta Biomater 2023; 166:187-200. [PMID: 37150277 PMCID: PMC10330445 DOI: 10.1016/j.actbio.2023.05.005] [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: 10/27/2022] [Revised: 04/17/2023] [Accepted: 05/02/2023] [Indexed: 05/09/2023]
Abstract
We recently developed a salivary gland tissue mimetic (SGm), comprised of salivary gland cells encapsulated in matrix metalloproteinase (MMP)-degradable poly(ethylene glycol) hydrogels within arrays of ∼320 µm diameter spherical cavities molded in PDMS. The SGm provides a functional and physiologically relevant platform well-suited to high-throughput drug screening for radioprotective compounds. However, the utility of the SGm would benefit from improved retention of acinar cell phenotype and function. We hypothesized that tuning biochemical cues presented within the PEG hydrogel matrix would improve maintenance of acinar cell phenotype and function by mimicking the natural extracellular matrix microenvironment of the intact gland. Hydrogels formed using slower-degrading MMP-sensitive peptide crosslinkers showed >2-fold increase in sphere number formed at 48 h, increased expression of acinar cell markers, and more robust response to calcium stimulation by the secretory agonist, carbachol, with reduced SGm tissue cluster disruption and outgrowth during prolonged culture. The incorporation of adhesive peptides containing RGD or IKVAV improved calcium flux response to secretory agonists at 14 days of culture. Tuning the hydrogel matrix improved cell aggregation, and promoted acinar cell phenotype, and stability of the SGm over 14 days of culture. Furthermore, combining this matrix with optimized media conditions synergistically prolonged the retention of the acinar cell phenotype in SGm. STATEMENT OF SIGNIFICANCE: Salivary gland (SG) dysfunction occurs due to off-target radiation due to head and neck cancer treatments. Progress in understanding gland dysfunction and developing therapeutic strategies for the SG are hampered by the lack of in vitro models, as salivary gland cells rapidly lose critical secretory function within 24 hours in vitro. Herein, we identify properties of poly(ethylene glycol) hydrogel matrices that enhance the secretory phenotype of SG tissue mimetics within the previously-described SG-microbubble tissue chip environment. Combining slow-degrading hydrogels with media conditions optimized for secretory marker expression further enhanced functional secretory response and secretory marker expression.
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Affiliation(s)
- Jared A Mereness
- Department of Biomedical Engineering, University of Rochester, United States
| | - Lindsay Piraino
- Department of Biomedical Engineering, University of Rochester, United States; Department of Dermatology, University of Rochester, United States; Materials Science Program, University of Rochester, Rochester, NY, United States
| | - Chiao Yun Chen
- Department of Biomedical Engineering, University of Rochester, United States
| | - Tracey Moyston
- Department of Biomedical Engineering, University of Rochester, United States
| | - Yuanhui Song
- Department of Biomedical Engineering, University of Rochester, United States; Knight Campus Department of Bioengineering, Syracuse University, Syracuse, NY, United States
| | - Andrew Shubin
- Department of Biomedical Engineering, University of Rochester, United States; Department of General Surgery, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Lisa A DeLouise
- Department of Biomedical Engineering, University of Rochester, United States; Department of Dermatology, University of Rochester, United States; Materials Science Program, University of Rochester, Rochester, NY, United States
| | - Catherine E Ovitt
- Department of Biomedical Genetics, University of Rochester, United States
| | - Danielle S W Benoit
- Department of Biomedical Engineering, University of Rochester, United States; Department of Dermatology, University of Rochester, United States; Materials Science Program, University of Rochester, Rochester, NY, United States; Department of Chemical Engineering, University of Rochester, United States; Center for Musculoskeletal Research, University of Rochester, Rochester, NY, United States; Knight Campus Bioengineering Department, University of Oregon, Eugene, OR, United States.
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Huang C, Sanaei F, Verdurmen WPR, Yang F, Ji W, Walboomers XF. The Application of Organs-on-a-Chip in Dental, Oral, and Craniofacial Research. J Dent Res 2023; 102:364-375. [PMID: 36726271 PMCID: PMC10031637 DOI: 10.1177/00220345221145555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The current development of microfluidics-based microphysiological systems (MPSs) will rapidly lead to a paradigm shift from traditional static 2-dimensional cell cultivation towards organized tissue culture within a dynamic cellular milieu. Especially organs-on-a-chip (OoCs) can very precisely re-create the mechanical and unique anatomical structures of the oral environment. This review provides an introduction to such technology, from commonly used chip materials and fabrication methods to the application of OoC in in vitro culture. OoCs are advantageous because of their small-scaled culture environment, the highly controlled dynamic experimental conditions, and the likeness to the in vivo structure. We specifically focus on current chip designs in dental, oral, and craniofacial (DOC) research. Also, future perspectives are discussed, like model standardization and the development of integrated platforms with advanced read-out functionality. By doing so, it will be possible for OoCs to serve as an alternative for animal testing and to develop highly predictive human models for clinical experiments and even personalized medicine.
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Affiliation(s)
- C Huang
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, Nijmegen, The Netherlands
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - F Sanaei
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, Nijmegen, The Netherlands
| | - W P R Verdurmen
- Department of Biochemistry, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, Nijmegen, The Netherlands
| | - F Yang
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, Nijmegen, The Netherlands
| | - W Ji
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Implantology, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - X F Walboomers
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, Nijmegen, The Netherlands
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Tiozzo-Lyon P, Andrade M, Leiva-Sabadini C, Morales J, Olivares A, Ravasio A, Aguayo S. Microfabrication approaches for oral research and clinical dentistry. FRONTIERS IN DENTAL MEDICINE 2023. [DOI: 10.3389/fdmed.2023.1120394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023] Open
Abstract
Currently, there is a variety of laboratory tools and strategies that have been developed to investigate in-vivo processes using in-vitro models. Amongst these, microfabrication represents a disruptive technology that is currently enabling next-generation biomedical research through the development of complex laboratory approaches (e.g., microfluidics), engineering of micrometer scale sensors and actuators (micropillars for traction force microscopy), and the creation of environments mimicking cell, tissue, and organ-specific contexts. Although microfabrication has been around for some time, its application in dental and oral research is still incipient. Nevertheless, in recent years multiple lines of research have emerged that use microfabrication-based approaches for the study of oral diseases and conditions with micro- and nano-scale sensitivities. Furthermore, many investigations are aiming to develop clinically relevant microfabrication-based applications for diagnostics, screening, and oral biomaterial manufacturing. Therefore, the objective of this review is to summarize the current application of microfabrication techniques in oral sciences, both in research and clinics, and to discuss possible future applications of these technologies for in-vitro studies and practical patient care. Initially, this review provides an overview of the most employed microfabrication methods utilized in biomedicine and dentistry. Subsequently, the use of micro- and nano-fabrication approaches in relevant fields of dental research such as endodontic and periodontal regeneration, biomaterials research, dental implantology, oral pathology, and biofilms was discussed. Finally, the current and future uses of microfabrication technology for clinical dentistry and how these approaches may soon be widely available in clinics for the diagnosis, prevention, and treatment of relevant pathologies are presented.
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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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Dhall A, Tan JY, Oh MJ, Islam S, Kim J, Kim A, Hwang G. A dental implant-on-a-chip for 3D modeling of host-material-pathogen interactions and therapeutic testing platforms. LAB ON A CHIP 2022; 22:4905-4916. [PMID: 36382363 PMCID: PMC9732915 DOI: 10.1039/d2lc00774f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The precise spatiotemporal control and manipulation of fluid dynamics on a small scale granted by lab-on-a-chip devices provide a new biomedical research realm as a substitute for in vivo studies of host-pathogen interactions. While there has been a rise in the use of various medical devices/implants for human use, the applicability of microfluidic models that integrate such functional biomaterials is currently limited. Here, we introduced a novel dental implant-on-a-chip model to better understand host-material-pathogen interactions in the context of peri-implant diseases. The implant-on-a-chip integrates gingival cells with relevant biomaterials - keratinocytes with dental resin and fibroblasts with titanium while maintaining a spatially separated co-culture. To enable this co-culture, the implant-on-a-chip's core structure necessitates closely spaced, tall microtrenches. Thus, an SU-8 master mold with a high aspect-ratio pillar array was created by employing a unique backside UV exposure with a selective optical filter. With this model, we successfully replicated the morphology of keratinocytes and fibroblasts in the vicinity of dental implant biomaterials. Furthermore, we demonstrated how photobiomodulation therapy might be used to protect the epithelial layer from recurrent bacterial challenges (∼3.5-fold reduction in cellular damage vs. control). Overall, our dental implant-on-a-chip approach proposes a new microfluidic model for multiplexed host-material-pathogen investigations and the evaluation of novel treatment strategies for infectious diseases.
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Affiliation(s)
- Atul Dhall
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Jun Ying Tan
- Department of Electrical and Computer Engineering, Kansas State University, Manhattan, KS 66506, USA
| | - Min Jun Oh
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
- Department of Chemical and Biomolecular Engineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sayemul Islam
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA 19122, USA
- Department of Medical Engineering, University of South Florida, Tampa, FL 33620, USA.
| | - Jungkwun Kim
- Department of Electrical and Computer Engineering, Kansas State University, Manhattan, KS 66506, USA
- Department of Electrical Engineering, University of North Texas, Denton, TX 76203, USA.
| | - Albert Kim
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA 19122, USA
- Department of Medical Engineering, University of South Florida, Tampa, FL 33620, USA.
| | - Geelsu Hwang
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
- Center for Innovation & Precision Dentistry, School of Dental Medicine, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
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Al-Ali M, Camilleri J. The scientific management of deep carious lesions in vital teeth using contemporary materials—A narrative review. FRONTIERS IN DENTAL MEDICINE 2022. [DOI: 10.3389/fdmed.2022.1048137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
AimThe aim of this article is to review the scientific evidence for deep caries removal in permanent vital teeth and the choice of dentine replacement material and restoration of the teeth to maintain long term tooth vitality and function.MethodThe two position statements namely the European Society of Endodontology and the American Association of Endodontists position statements on vital pulp therapy will be scrutinized and compared with regards to the deep caries removal strategy and assessed for evidence of best practice. The properties of materials used to manage vital pulps and the best way to restore the teeth will be reviewed and guidance on the full management of vital teeth will be suggested.ConclusionsPromoting new treatment modalities for reversible and irreversible pulpitis allowing for pulp preservation should be considered. Although debatable, cases with deep caries should be managed by complete non-selective caries removal which will allow for pulpal management if needed and a more predictable outcome can be expected when using the new materials and treatment modalities of vital pulp therapy.
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Zommiti M, Connil N, Tahrioui A, Groboillot A, Barbey C, Konto-Ghiorghi Y, Lesouhaitier O, Chevalier S, Feuilloley MGJ. Organs-on-Chips Platforms Are Everywhere: A Zoom on Biomedical Investigation. Bioengineering (Basel) 2022; 9:646. [PMID: 36354557 PMCID: PMC9687856 DOI: 10.3390/bioengineering9110646] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/13/2022] [Accepted: 10/27/2022] [Indexed: 08/28/2023] Open
Abstract
Over the decades, conventional in vitro culture systems and animal models have been used to study physiology, nutrient or drug metabolisms including mechanical and physiopathological aspects. However, there is an urgent need for Integrated Testing Strategies (ITS) and more sophisticated platforms and devices to approach the real complexity of human physiology and provide reliable extrapolations for clinical investigations and personalized medicine. Organ-on-a-chip (OOC), also known as a microphysiological system, is a state-of-the-art microfluidic cell culture technology that sums up cells or tissue-to-tissue interfaces, fluid flows, mechanical cues, and organ-level physiology, and it has been developed to fill the gap between in vitro experimental models and human pathophysiology. The wide range of OOC platforms involves the miniaturization of cell culture systems and enables a variety of novel experimental techniques. These range from modeling the independent effects of biophysical forces on cells to screening novel drugs in multi-organ microphysiological systems, all within microscale devices. As in living biosystems, the development of vascular structure is the salient feature common to almost all organ-on-a-chip platforms. Herein, we provide a snapshot of this fast-evolving sophisticated technology. We will review cutting-edge developments and advances in the OOC realm, discussing current applications in the biomedical field with a detailed description of how this technology has enabled the reconstruction of complex multi-scale and multifunctional matrices and platforms (at the cellular and tissular levels) leading to an acute understanding of the physiopathological features of human ailments and infections in vitro.
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Affiliation(s)
- Mohamed Zommiti
- Research Unit Bacterial Communication and Anti-infectious Strategies (CBSA, UR4312), University of Rouen Normandie, 27000 Evreux, France
| | | | | | | | | | | | | | | | - Marc G. J. Feuilloley
- Research Unit Bacterial Communication and Anti-infectious Strategies (CBSA, UR4312), University of Rouen Normandie, 27000 Evreux, France
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19
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Franca CM, Balbinot GDS, Cunha D, Saboia VDPA, Ferracane J, Bertassoni LE. In-vitro models of biocompatibility testing for restorative dental materials: From 2D cultures to organs on-a-chip. Acta Biomater 2022; 150:58-66. [PMID: 35933103 PMCID: PMC9814917 DOI: 10.1016/j.actbio.2022.07.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/13/2022] [Accepted: 07/28/2022] [Indexed: 02/08/2023]
Abstract
Dental caries is a biofilm-mediated, diet-modulated, multifactorial and dynamic disease that affects more than 90% of adults in Western countries. The current treatment for decayed tissue is based on using materials to replace the lost enamel or dentin. More than 500 million dental restorations are placed annually worldwide, and materials used for these purposes either directly or indirectly interact with dentin and pulp tissues. The development and understanding of the effects of restorative dental materials are based on different in-vitro and in-vivo tests, which have been evolving with time. In this review, we first discuss the characteristics of the tooth and the dentin-pulp interface that are unique for materials testing. Subsequently, we discuss frequently used in-vitro tests to evaluate the biocompatibility of dental materials commonly used for restorative procedures. Finally, we present our perspective on the future directions for biological research on dental materials using tissue engineering and organs on-a-chip approaches. STATEMENT OF SIGNIFICANCE: Dental caries is still the most prevalent infectious disease globally, requiring more than 500 million restorations to be placed every year. Regrettably, the failure rates of such restorations are still high. Those rates are partially based on the fact that current platforms to test dental materials are somewhat inaccurate in reproducing critical components of the complex oral microenvironment. Thus, there is a collective effort to develop new materials while evolving the platforms to test them. In this context, the present review critically discusses in-vitro models used to evaluate the biocompatibility of restorative dental materials and brings a perspective on future directions for tissue-engineered and organs-on-a-chip platforms for testing new dental materials.
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Affiliation(s)
- Cristiane Miranda Franca
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, United States
| | - Gabriela de Souza Balbinot
- Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Diana Cunha
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | | | - Jack Ferracane
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, United States
| | - Luiz E Bertassoni
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, United States; Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, United States; Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, United States; Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, United States.
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Luo H, Basabrain MS, Zhong J, Liu J, Zhang Y, Qi Y, Zou T, Zhang C. Neuroregenerative potential of SCAP-derived neuronal cell spheroids regulated by SCAPs under various microenvironments in a pulp-on-chip system. J Endod 2022. [DOI: 10.1016/j.joen.2022.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Abstract
The failure of animal models to predict therapeutic responses in humans is a major problem that also brings into question their use for basic research. Organ-on-a-chip (organ chip) microfluidic devices lined with living cells cultured under fluid flow can recapitulate organ-level physiology and pathophysiology with high fidelity. Here, I review how single and multiple human organ chip systems have been used to model complex diseases and rare genetic disorders, to study host-microbiome interactions, to recapitulate whole-body inter-organ physiology and to reproduce human clinical responses to drugs, radiation, toxins and infectious pathogens. I also address the challenges that must be overcome for organ chips to be accepted by the pharmaceutical industry and regulatory agencies, as well as discuss recent advances in the field. It is evident that the use of human organ chips instead of animal models for drug development and as living avatars for personalized medicine is ever closer to realization.
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Affiliation(s)
- Donald E Ingber
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA, USA.
- Vascular Biology Program, Department of Surgery, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA.
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, USA.
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22
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Hu S, Muniraj G, Mishra A, Hong K, Lum JL, Hong CHL, Rosa V, Sriram G. Characterization of silver diamine fluoride cytotoxicity using microfluidic tooth-on-a-chip and gingival equivalents. Dent Mater 2022; 38:1385-1394. [PMID: 35778310 DOI: 10.1016/j.dental.2022.06.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 06/16/2022] [Accepted: 06/22/2022] [Indexed: 01/18/2023]
Abstract
OBJECTIVE This study aims to characterize the cytotoxicity potential of silver diamine fluoride (SDF) on dental pulp stem cells (DPSC) and gingival equivalents. METHODS DPSC cultured on 96-well plates was exposed directly to SDF (0.0001-0.01%) and cell viability (IC50) quantified. Effect of SDF on DPSC viability under flow (with dentin barrier) conditions was evaluated using a custom-designed microfluidic "tooth-on-a-chip". Permeability of dentin discs (0.5-1.5 mm thickness) was evaluated using lucifer yellow permeation assay. Dentin discs were treated with 38% SDF (up to 3 h), and cell viability (live/dead assay) of the DPSC cultured in the inlet (unexposed) and outlet (exposed) regions of the pulp channel was evaluated. To assess the mucosal corrosion potential, gingival equivalents were treated with 38% SDF for 3 or 60 min (OECD test guideline 431) and characterized by MTT assay and histomorphometric analysis. RESULTS DPSC exposed directly to SDF showed a dose-dependent reduction in cell viability (IC50: 0.001%). Inlet channels (internal control) of the tooth-on-a-chip exposed to PBS and SDF-exposed dentin discs showed> 85% DPSC viability. In contrast, the outlet channels of SDF-exposed dentin discs showed a decreased viability of< 31% and 0% (1.5 and ≤1.0 mm thick dentin disc, respectively) (p < 0.01). The gingiva equivalents treated with SDF for 3 and 60 min demonstrated decreased epithelial integrity, loss of intercellular cohesion and corneal layer detachment with significant reduction in intact epithelial thickness (p < 0.05). SIGNIFICANCE SDF penetrated the dentin (≤1 mm thick) inducing significant death of the pulp cells. SDF also disrupted gingival epithelial integrity resulting in mucosal corrosion.
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Affiliation(s)
- Shijia Hu
- Faculty of Dentistry, National University of Singapore, Singapore.
| | | | - Apurva Mishra
- Faculty of Dentistry, National University of Singapore, Singapore
| | - Kanglun Hong
- National University Centre for Oral Health Singapore, National University Hospital, Singapore
| | - Jing Li Lum
- National University Centre for Oral Health Singapore, National University Hospital, Singapore
| | | | - Vinicius Rosa
- Faculty of Dentistry, National University of Singapore, Singapore; ORCHIDS: Oral Care Health Innovations and Designs Singapore, National University of Singapore, Singapore.
| | - Gopu Sriram
- Faculty of Dentistry, National University of Singapore, Singapore; ORCHIDS: Oral Care Health Innovations and Designs Singapore, National University of Singapore, Singapore.
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Camilleri J, Atmeh A, Li X, Meschi N. Present status and future directions: Hydraulic materials for endodontic use. Int Endod J 2022; 55 Suppl 3:710-777. [PMID: 35167119 PMCID: PMC9314068 DOI: 10.1111/iej.13709] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/11/2022] [Accepted: 02/13/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND Hydraulic materials are used in Endodontics due to their hydration characteristics namely the formation of calcium hydroxide when mixing with water and also because of their hydraulic properties. These materials are presented in various consistencies and delivery methods. They are composed primarily of tricalcium and dicalcium silicate, and also include a radiopacifier, additives and an aqueous or a non-aqueous vehicle. Only materials whose primary reaction is with water can be classified as hydraulic. OBJECTIVES Review of the classification of hydraulic materials by Camilleri and the literature pertaining to specific uses of hydraulic cements in endodontics namely intra-coronal, intra-radicular and extra-radicular. Review of the literature on the material properties linked to specific uses providing the current status of these materials after which future trends and gaps in knowledge could be identified. METHODS The literature was reviewed using PUBMED, and for each clinical use, the in vitro properties such as physical, chemical, biological and antimicrobial characteristics and clinical data were extracted and evaluated. RESULTS A large number of publications were retrieved for each clinical use and these were grouped depending on the property type being investigated. CONCLUSIONS The hydraulic cements have made a difference in clinical outcomes. The main shortcoming is the poor testing methodologies employed which provide very limited information and also inhibits adequate clinical translation. Furthermore, the clinical protocols need to be updated to enable the materials to be employed effectively.
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Affiliation(s)
- Josette Camilleri
- School of DentistryCollege of Medical and Dental SciencesUniversity of BirminghamBirminghamUK
| | - Amre Atmeh
- Hamdan Bin Mohammed College of Dental Medicine (HBMCDM)Mohammed Bin Rashid University of Medicine and Health Sciences (MBRU)DubaiUnited Arab Emirates
| | - Xin Li
- Department of Oral Health SciencesBIOMAT – Biomaterials Research GroupKU Leuven and DentistryUniversity Hospitals LeuvenLeuvenBelgium
| | - Nastaran Meschi
- Department of Oral Health SciencesBIOMAT – Biomaterials Research GroupKU Leuven and DentistryUniversity Hospitals LeuvenLeuvenBelgium
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Hosseinpour S, Gaudin A, Peters OA. A critical analysis of research methods and experimental models to study biocompatibility of endodontic materials. Int Endod J 2022; 55 Suppl 2:346-369. [PMID: 35124840 PMCID: PMC9315036 DOI: 10.1111/iej.13701] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 02/04/2022] [Indexed: 12/03/2022]
Abstract
Materials used for endodontics and with direct contact to tissues have a wide range of indications, from vital pulpal treatments to root filling materials and those used in endodontic surgery. In principle, interaction with dental materials may result in damage to tissues locally or systemically. Thus, a great variety of test methods are applied to evaluate a materials' potential risk of adverse biological effects to ensure their biocompatibility before commercialization. However, the results of biocompatibility evaluations are dependent on not only the tested materials but also the test methods due to the diversity of these effects and numerous variables involved. In addition, diverse biological effects require equally diverse assessments on a structured and planned approach. Such a structured assessment of the materials consists of four phases: general toxicity, local tissue irritation, pre‐clinical tests and clinical evaluations. Various types of screening assays are available; it is imperative to understand their advantages and limitations to recognize their appropriateness and for an accurate interpretation of their results. Recent scientific advances are rapidly introducing new materials to endodontics including nanomaterials, gene therapy and tissue engineering biomaterials. These new modalities open a new era to restore and regenerate dental tissues; however, all these new technologies can also present new hazards to patients. Before any clinical usage, new materials must be proven to be safe and not hazardous to health. Certain international standards exist for safety evaluation of dental materials (ISO 10993 series, ISO 7405 and ISO 14155‐1), but researchers often fail to follow these standards due to lack of access to standards, limitation of the guidelines and complexity of new experimental methods, which may cause technical errors. Moreover, many laboratories have developed their testing strategy for biocompatibility, which makes any comparison between findings more difficult. The purpose of this review was to discuss the concept of biocompatibility, structured test programmes and international standards for testing the biocompatibility of endodontic material biocompatibility. The text will further detail current test methods for evaluating the biocompatibility of endodontic materials, and their advantages and limitations.
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Affiliation(s)
- S Hosseinpour
- School of Dentistry The University of Queensland Herston QLD Australia
| | - A Gaudin
- Inserm UMR 1229 RMeS, Regenerative Medicine and Skeleton Université de Nantes ONIRIS Nantes France
- Université de Nantes UFR Odontologie Nantes France
| | - O A Peters
- School of Dentistry The University of Queensland Herston QLD Australia
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Wang Z, Shen Y, Haapasalo M. Antimicrobial and Antibiofilm Properties of Bioceramic Materials in Endodontics. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7594. [PMID: 34947188 PMCID: PMC8706218 DOI: 10.3390/ma14247594] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/30/2021] [Accepted: 12/07/2021] [Indexed: 12/19/2022]
Abstract
Microbes are prevalent in the root canals of necrotic teeth, and they are the cause of primary and post-treatment apical periodontitis. Bacteria can dwell within the infected root canal system as surface-adherent biofilm structures, which exhibit high resistance to antimicrobial agents. Bioceramic materials, with their biocompatible nature and excellent physico-chemical properties, have been widely used in dental applications, including endodontics. This review focuses on the application of bioceramic technology in endodontic disinfection and the antibiofilm effects of endodontic bioceramic materials. Different bioceramic materials have shown different levels of antibiofilm effects. New supplements have emerged to potentially enhance the antibiofilm properties of bioceramics aiming to achieve the goal of microbial elimination in the root canal system.
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Affiliation(s)
| | | | - Markus Haapasalo
- Division of Endodontics, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada; (Z.W.); (Y.S.)
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Affiliation(s)
- J L Ferracane
- Department of Restorative Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - L E Bertassoni
- Department of Restorative Dentistry, Oregon Health & Science University, Portland, OR, USA
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