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Marovic D, Bota M, Tarle F, Par M, Haugen HJ, Zheng K, Pavić D, Miloš M, Čižmek L, Babić S, Čož-Rakovac R, Trebše P, Boccaccini AR. The influence of copper-doped mesoporous bioactive nanospheres on the temperature rise during polymerization, polymer cross-linking density, monomer release and embryotoxicity of dental composites. Dent Mater 2024; 40:1078-1087. [PMID: 38797613 DOI: 10.1016/j.dental.2024.05.012] [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: 11/04/2023] [Revised: 03/05/2024] [Accepted: 05/13/2024] [Indexed: 05/29/2024]
Abstract
OBJECTIVES Composites with copper-doped mesoporous bioactive nanospheres (Cu-MBGN) were developed to prevent secondary caries by imparting antimicrobial and ion-releasing/remineralizing properties. METHODS Seven experimental composites containing 1, 5 or 10 wt% Cu-MBGN, the corresponding inert controls (silica) and bioactive controls (bioactive glass 45S5) were prepared. The temperature rise during light curing, cross-linking density by ethanol softening test, monomer elution and their potential adverse effects on the early development of zebrafish Danio rerio was investigated. RESULTS Materials combining Cu-MBGN and silica showed the highest resistance to ethanol softening, as did the bioactive controls. Cu-MBGN composites showed significant temperature rise and reached maximum temperature in the shortest time. Bisphenol A was not detected, while bis-GMA was found only in the control materials and TEGDMA in the eluates of all materials. There was no increase in zebrafish mortality and abnormality rates during exposure to the eluates of any of the materials. CONCLUSIONS The composite with 5 wt% Cu-MBGN combined with nanosilica fillers showed the lowest ethanol softening, indicating the polymer's highest durability and cross-linking density. Despite the TEGDMA released from all tested materials, no embryotoxic effect was observed.
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Affiliation(s)
- Danijela Marovic
- University of Zagreb School of Dental Medicine, Department of Endodontics and Restorative Dental Medicine, Gunduliceva 5, 10000 Zagreb, Croatia.
| | - Maria Bota
- student, University of Zagreb School of Dental Medicine, Gunduliceva 5, 10000 Zagreb, Croatia
| | - Frano Tarle
- student, University of Zagreb School of Dental Medicine, Gunduliceva 5, 10000 Zagreb, Croatia
| | - Matej Par
- University of Zagreb School of Dental Medicine, Department of Endodontics and Restorative Dental Medicine, Gunduliceva 5, 10000 Zagreb, Croatia
| | - Håvard J Haugen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, Geitmyrsveien 71, 0455 Oslo, Norway
| | - Kai Zheng
- Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, 136 Hanzhong Rd., 210029 Nanjing, China; Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
| | | | | | - Lara Čižmek
- Ruđer Bošković Institute, Laboratory for Biotechnology in Aquaculture, Division of Materials Chemistry, Bijenička 54, Zagreb, Croatia
| | - Sanja Babić
- Ruđer Bošković Institute, Laboratory for Biotechnology in Aquaculture, Division of Materials Chemistry, Bijenička 54, Zagreb, Croatia
| | - Rozelindra Čož-Rakovac
- Ruđer Bošković Institute, Laboratory for Biotechnology in Aquaculture, Division of Materials Chemistry, Bijenička 54, Zagreb, Croatia
| | - Polonca Trebše
- Faculty of Health Sciences, University of Ljubljana, Zdravstvena pot 5, 1000 Ljubljana, Slovenia
| | - Aldo R Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
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Tian F, Mu H, Shi Y, Chen X, Zou X, Gao X, Wang X. Clinical evaluation of Giomer and self-etch adhesive compared with nanofilled resin composite and etch-and-rinse adhesive - Results at 8 years. Dent Mater 2024; 40:1088-1095. [PMID: 38806383 DOI: 10.1016/j.dental.2024.05.013] [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: 10/23/2023] [Revised: 03/06/2024] [Accepted: 05/13/2024] [Indexed: 05/30/2024]
Abstract
OBJECTIVE This study aimed to evaluate the long-term clinical performance of Giomer and a self-etch adhesive system compared with a nanofilled resin composite and etch-and-rinse adhesive system in Class I and Class II restorations. METHOD The study was designed to be double-blinded with intra-individual control. 48 patients with 54 pairs of cavities (class I or class II) were recruited. Each pair of restorations was placed with either BEAUTIFIL II (BF) and FL-BOND II (FL) or Filtek Z350 (Z350) and Scotchbond Multi-Purpose (SMP). Clinical evaluation was performed at baseline, 6-month, 18-month, 4-year and 8-year after placement according to modified USPHS criteria. Kaplan-Meier survival analysis and log rank tests were performed (SPSS 20.0, IBM Corporation, US) to compare the survival probability of different restorations.A generalized linear mixed model (GLMM) was adopted to assess the performance of the materials. The McNemar test was used to show significant changes for all the evaluation criteria and difference between them. RESULTS At the eight-year recall, 32 patients with 67 restorations were present. There were twelve restorations in total recorded as failure due to loss of retention, restoration fracture, secondary caries, tooth fracture or endodontic treatment due to pulp necrosis. The survival probabilities and calculated annual failure rate(AFR) of BF and Z350 restorations at 8-year were 87.2 % vs 87.8 % and 1.6 % vs 1.5 % respectively with no significant difference (p > 0.05)between the two materials. Over the recall time range of eight years, decreased possibility of alpha rating was observed for retention, marginal adaptation, marginal staining and surface roughness for both materials (p < 0.05). Decreased possibility of alpha rating was observed for surface staining and secondary caries for Z350 (p < 0.05) and restoration fracture for BF (p < 0.05), respectively. Comparing the two restorative systems over eight years, no significant difference was seen for linear decline of the possibility of alpha rating for any of the criteria evaluated (p > 0.05). CONCLUSION Giomer material and the self-etch adhesive system had comparable clinical performance with nanofilled resin composite and etch-and-rinse adhesive system over the observation period of eight years.
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Affiliation(s)
- Fucong Tian
- Department of Cariology and Endodontology, School and Hospital of Stomatology, Peking University, China; Department of Endodontics, The Dental College of Georgia, Augusta University, USA
| | - Haili Mu
- Peking University Hospital of Stomatology First Clinical Division, Peking University, China
| | - Yang Shi
- Biostatistics and Bioinformatics Core, Karmanos Cancer Institute, Department of Oncology, Wayne State University School of Medicine, USA
| | - Xiaobo Chen
- Department of Cariology and Endodontology, School and Hospital of Stomatology, Peking University, China; Department of Stomatology, Tsinghua University Hospital. Tsinghua University, China
| | - Xiaoying Zou
- Department of Cariology and Endodontology, School and Hospital of Stomatology, Peking University, China; Center of Stomatology, Peking University Hospital, Peking University, China
| | - Xuejun Gao
- Department of Cariology and Endodontology, School and Hospital of Stomatology, Peking University, China
| | - Xiaoyan Wang
- Department of Cariology and Endodontology, School and Hospital of Stomatology, Peking University, China.
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Zhang S, Wang X, Yin S, Wang J, Chen H, Jiang X. Urchin-like multiscale structured fluorinated hydroxyapatite as versatile filler for caries restoration dental resin composites. Bioact Mater 2024; 35:477-494. [PMID: 38404640 PMCID: PMC10885616 DOI: 10.1016/j.bioactmat.2024.02.004] [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: 11/23/2023] [Revised: 01/23/2024] [Accepted: 02/06/2024] [Indexed: 02/27/2024] Open
Abstract
Caries is one of the most prevalent human diseases, resulting from demineralization of tooth hard tissue caused by acids produced from bacteria, and can progress to pulpal inflammation. Filling restoration with dental resin composites (DRCs) is currently the most common treatment for caries. However, existing DRCs suffer from low fracture strength and lack comprehensive anti-caries bioactivity including remineralization, pulp protection, and anti-cariogenic bacteria effects. In this study, inspired by plant roots' ability to stabilize and improve soil, fluorinated urchin-like hydroxyapatite (FUHA) with a three-dimensional whisker structure and bioactive components of calcium, phosphorus, and fluorine was designed and synthesized by a dynamic self-assembly method. Furthermore, versatile FUHA particles with different loading fractions were used as functional fillers to fabricate methacrylate-based DRCs, where the urchin-like hydroxyapatite (UHA) filled DRCs and commercial DRCs (Z350XT and BEAUTIFIL II) served as the control groups. The results demonstrated that FUHA with 50 wt% loading in resin matrix endowed DRC (F5) with excellent physicochemical properties, dentin remineralization property, cell viability, promotion of dental pulp stem cells mineralization, and antibacterial properties. Meanwhile, F5 also presented good clinical handling and aesthetic characteristics. Therefore, structure/functional-integrated FUHA filled DRCs have potential as a promising strategy for tooth restoration and anti-caries bioactivity.
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Affiliation(s)
- Shuning Zhang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, China
| | - Xiao Wang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, China
| | - Shi Yin
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, China
| | - Junjun Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Hongyan Chen
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, China
| | - Xinquan Jiang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, China
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Ozer NE, Sahin Z, Yikici C, Duyan S, Kilicarslan MA. Bacterial adhesion to composite resins produced by additive and subtractive manufacturing. Odontology 2024; 112:460-471. [PMID: 37819468 DOI: 10.1007/s10266-023-00862-5] [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: 05/15/2023] [Accepted: 09/26/2023] [Indexed: 10/13/2023]
Abstract
The aim of this study was to evaluate the surface roughness and contact angle of composite resins produced by CAD/CAM milling and three-dimensional (3D) printing for permanent restorations as well as the adhesion of S. mutans and S. sanguinis bacteria to these composites. Three CAD/CAM milling composite resins (Vita Enamic-VE, Cerasmart-CE, Lava Ultimate-LU) and three 3D printing resins (Varseo Smile Crown plus-VSC, Saremco print Crowntech-SPC, Formlabs 3B Permanent crown-FLP) were selected. Twenty samples were prepared for each group. Using a contact profilometer, the surface roughness was determined, and an optical goniometer was used to quantify the contact angle. To evaluate the bacterial adhesion, composite specimens were immersed in mucin containing artificial saliva. All samples were incubated for 24 h at 37°C in 5% CO2. CFUs were determined by counting colonies after the incubation period. Surface roughness values of test samples were the highest in the Group VSC [0.46 (0.14) µm], whereas the lowest values were found in the Group LU [0.23 (0.05) µm]. There was no statistically significant difference between the groups in contact angle values (p > 0.05). The S. mutans adhesion extent on the Group SPC was statistically higher compared to all other materials with p < 0.05. For S. sanguinis, the lowest bacterial adhesion value was recorded in Group CE (3.00 × 104 CFU/ml) and statistically significant differences were found with Group VE and VSC (p < 0.05). Different digital manufacturing techniques and material compositions can affect the surface roughnesses of composite resins. All composite resin samples have hydrophobic characteristics. Microbial adhesion of the tested composite resins may be varied depending on the bacterial species. S. mutans showed much more adhesion to these materials than S. sanguinis.
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Affiliation(s)
- Nazire Esra Ozer
- Department of Prosthodontics, Faculty of Dentistry, Lokman Hekim University, Söğütözü. 2179 St., 06510, Çankaya, Ankara, Turkey.
| | - Zeynep Sahin
- Department of Prosthodontics, Faculty of Dentistry, Lokman Hekim University, Söğütözü. 2179 St., 06510, Çankaya, Ankara, Turkey
| | - Cansu Yikici
- Department of Restorative Dentistry, Faculty of Dentistry, Lokman Hekim University, Çankaya, Ankara, Turkey
| | - Serhat Duyan
- Department of Medical Microbiology, Department of Microbiology, University of Health Sciences, Gülhane Training and Research Hospital, Etlik, Ankara, Turkey
| | - Mehmet Ali Kilicarslan
- Department of Prosthodontics, Faculty of Dentistry, Ankara University, Yenimahalle, Ankara, Turkey
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Ortensi L, Grande F, Testa C, Balma AM, Pedraza R, Mussano F, La Rosa GRM, Pedullà E. Fracture strength of 3-units fixed partial dentures fabricated with metal-ceramic, graphene doped PMMA and PMMA before and after ageing: An in-vitro study. J Dent 2024; 142:104865. [PMID: 38311017 DOI: 10.1016/j.jdent.2024.104865] [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: 11/20/2023] [Revised: 01/13/2024] [Accepted: 01/25/2024] [Indexed: 02/06/2024] Open
Abstract
OBJECTIVES To evaluate the fracture strength and linear elongation at break of three-units fixed partial dentures (FPDs) fabricated with traditional and new materials for fixed prosthodontics before and after ageing. METHODS Sixty models of three-units FPDs were fabricated and cemented onto a Co-Cr model simulating the replacement of a maxillary second premolar. The samples were randomly divided into 3 groups: metal-ceramic (MCR), graphene-doped polymethylmethacrylate (PMMA-GR) and polymethylmethacrylate (PMMA). Half of the samples were directly subjected to fracture test, while the remaining half underwent an ageing process and then a fracture loading test using an electrodynamic testing machine. Fracture load and elongation at break values were taken and statistically analysed. RESULTS Significant differences were detected between the different materials (p<0.05). All groups showed a reduction of the fracture load and elongation at break values after ageing, but not statistically significant, except for PMMA group (p = 2.012e-19) (p = 3.8e-11). CONCLUSIONS MCR and PMMA-GR three-units FPDs showed higher fracture strength and lower elongation at break compared to PMMA. MCR and PMMA-GR had higher resistance to ageing processes compared to PMMA. CLINICAL SIGNIFICANCE PMMA-GR could be considered a material for long-term provisional restorations as its mechanical behaviour and ageing resistance are more like MCR than PMMA.
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Affiliation(s)
- Luca Ortensi
- Department of Prosthodontics, University of Ferrara, Ferrara, Italy
| | - Francesco Grande
- Department of Prosthodontics, University of Ferrara, Ferrara, Italy; Department of Mechanical and aerospace engineering, Polytechnic University of Turin, Turin, Italy.
| | - Claudia Testa
- Department of General Surgery and Medical- Surgical Specialties, University of Catania, Italy
| | - Alessandro Mosca Balma
- Department of Surgical Sciences, CIR Dental School, University of Turin, 10126 Turin, Italy
| | - Riccardo Pedraza
- Department of Mechanical and aerospace engineering, Polytechnic University of Turin, Turin, Italy; Department of Surgical Sciences, CIR Dental School, University of Turin, 10126 Turin, Italy
| | - Federico Mussano
- Department of Surgical Sciences, CIR Dental School, University of Turin, 10126 Turin, Italy
| | | | - Eugenio Pedullà
- Department of General Surgery and Medical- Surgical Specialties, University of Catania, Italy
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6
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Yao C, Liang S, Yu M, Wu H, Ahmed MH, Liu Y, Yu J, Zhao Y, Van der Bruggen B, Huang C, Van Meerbeek B. High-Performance Bioinspired Microspheres for Boosting Dental Adhesion. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2310251. [PMID: 38362704 DOI: 10.1002/smll.202310251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/13/2024] [Indexed: 02/17/2024]
Abstract
Dental adhesives are widely used in daily practice for minimally invasive restorative dentistry but suffer from bond degradation and biofilm attack. Bio-inspired by marine mussels having excellent surface-adhesion capability and high chemical affinity of polydopamine (PDA) to metal ions, herein, experimental zinc (Zn)-containing polydopamine-based adhesive formulation, further being referred to as "Zn-PDA@SiO2 "-incorporated adhesive is proposed as a novel dental adhesive. Different Zn contents (5 and 10 mm) of Zn-PDA@SiO2 are prepared. Considering the synergistic effect of Zn and PDA, Zn-PDA@SiO2 not only presents excellent antibacterial potential and notably inhibits enzymatic activity (soluble and matrix-bound proteases), but also exhibits superior biocompatibility and biosafety in vitro/vivo. The long-term bond stability is substantially improved by adding 5 wt% 5 mm Zn-PDA@SiO2 to the primer. The aged bond strength of the experimentally formulated dental adhesives applied in self-etch (SE) bonding mode is 1.9 times higher than that of the SE gold-standard adhesive. Molecular dynamics calculations indicate the stable formation of covalent bonds, Zn-assisted coordinative bonds, and hydrogen bonds between PDA and collagen. Overall, this bioinspired dental adhesive provides an avenue technology for innovative biomedical applications and has already revealed promising perspectives for dental restorative dentistry.
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Affiliation(s)
- Chenmin Yao
- 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, Wuhan, 430079, China
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), Leuven, 3000, Belgium
| | - Shengjie Liang
- 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, Wuhan, 430079, China
| | - Miaoyang Yu
- 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, Wuhan, 430079, China
| | - Hongling Wu
- 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, Wuhan, 430079, China
| | - Mohammed H Ahmed
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), Leuven, 3000, Belgium
- Department of Dental Biomaterials, Faculty of Dentistry, Tanta University, Tanta, 31511, Egypt
| | - Yingheng Liu
- 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, Wuhan, 430079, China
| | - Jian Yu
- 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, Wuhan, 430079, China
| | - Yan Zhao
- Department of Chemical Engineering, KU Leuven (University of Leuven), Celestijnenlaan 200F, Leuven, B-3001, Belgium
| | - Bart Van der Bruggen
- Department of Chemical Engineering, KU Leuven (University of Leuven), Celestijnenlaan 200F, Leuven, B-3001, Belgium
| | - Cui Huang
- 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, Wuhan, 430079, China
| | - Bart Van Meerbeek
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), Leuven, 3000, Belgium
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7
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Contreras SM, Fernandes JB, Spinola MDS, Garcia MT, Junqueira JC, Bresciani E, Caneppele TMF. Efficacy of bioactive materials in preventing Streptococcus mutans-induced caries on enamel and dentine. Eur J Oral Sci 2023; 131:e12948. [PMID: 37583060 DOI: 10.1111/eos.12948] [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: 05/04/2023] [Accepted: 07/26/2023] [Indexed: 08/17/2023]
Abstract
The study investigated the ability of bioactive materials used to restore enamel and dentine specimens to prevent caries. Enamel (n = 50) and dentine (n = 50) specimens were obtained from bovine incisors, prepared, and randomly allocated to one of five groups according to the restorative treatment: alkasite without adhesive system; alkasite with adhesive system; high viscosity glass ionomer cement; resin composite; no restoration; negative control group. Specimens were restored, exposed to a thermal cycling aging protocol, sterilized, and exposed to a cariogenic challenge induced by Streptococcus mutans and then submitted to surface and subsurface microhardness tests and polarized light microscopy to verify the caries lesion development in enamel or dentine surrounding the restorative materials. Data were analyzed using one-way ANOVA. In enamel and dentine, glass ionomer cement, alkasite without and with adhesive system presented a lower percentage surface microhardness loss than resin composite and negative control. Enamel subsurface microhardness presented no statistically significant differences between glass ionomer cement, alkasite without and with adhesive system. Glass ionomer cement also did not present statistically significant differences from resin composite and the negative control. In dentine, glass ionomer cement showed the highest subsurface microhardness values. In conclusion, bioactive restorative materials provide greater protection to enamel and dentine against surface caries development than resin composite.
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Affiliation(s)
- Sheila Mondragón Contreras
- Department of Restorative Dentistry, São Paulo State University - UNESP, Institute of Science and Technology, São José dos Campos, Brazil
| | - Juliana Benace Fernandes
- Department of Restorative Dentistry, São Paulo State University - UNESP, Institute of Science and Technology, São José dos Campos, Brazil
| | | | - Maíra Terra Garcia
- Department of Biosciences and Oral Diagnosis, São Paulo State University - UNESP, Institute of Science and Technology, São José dos Campos, Brazil
| | - Juliana Campos Junqueira
- Department of Biosciences and Oral Diagnosis, São Paulo State University - UNESP, Institute of Science and Technology, São José dos Campos, Brazil
| | - Eduardo Bresciani
- Department of Restorative Dentistry, São Paulo State University - UNESP, Institute of Science and Technology, São José dos Campos, Brazil
| | - Taciana Marco Ferraz Caneppele
- Department of Restorative Dentistry, São Paulo State University - UNESP, Institute of Science and Technology, São José dos Campos, Brazil
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Tanaka CJ, Rodrigues JA, Pingueiro JMS, Macedo TT, Feres M, Shibli JA, Bueno-Silva B. Antibacterial Activity of a Bioactive Tooth-Coating Material Containing Surface Pre-Reacted Glass in a Complex Multispecies Subgingival Biofilm. Pharmaceutics 2023; 15:1727. [PMID: 37376175 DOI: 10.3390/pharmaceutics15061727] [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: 05/05/2023] [Revised: 06/11/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
Bioactive materials were developed with the ability to release fluoride and provide some antimicrobial potential, to be widely used in dentistry today. However, few scientific studies have evaluated the antimicrobial activity of bioactive surface pre-reacted glass (S-PRG) coatings (PRG Barrier Coat, Shofu, Kyoto, Japan) on periodontopathogenic biofilms. This study evaluated the antibacterial activity of S-PRG fillers on the microbial profile of multispecies subgingival biofilms. A Calgary Biofilm Device (CBD) was used to grow a 33-species biofilm related to periodontitis for 7 days. The S-PRG coating was applied on CBD pins from the test group and photo-activated (PRG Barrier Coat, Shofu), while the control group received no coating. Seven days after treatment, the total bacterial counts, metabolic activity, and microbial profile of the biofilms were observed using a colorimetric assay and DNA-DNA hybridization. Statistical analyses were applied; namely, the Mann-Whitney, Kruskal-Wallis, and Dunn's post hoc tests. The bacterial activity of the test group was reduced by 25.7% compared with that of the control group. A statistically significant reduction was observed for the counts of 15 species: A. naeslundii, A. odontolyticus, V. parvula, C. ochracea, C. sputigena, E. corrodens, C. gracilis, F. nucleatum polymorphum, F. nucleatum vincentii, F. periodonticum, P. intermedia, P. gingivalis, G. morbillorum, S. anginosus, and S. noxia (p ≤ 0.05). The bioactive coating containing S-PRG modified the composition of the subgingival biofilm in vitro, thereby decreasing colonization by pathogens.
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Affiliation(s)
- Caio Junji Tanaka
- School of Dentistry, Mogi das Cruzes University, Mogi das Cruzes 08780-911, Sao Paulo, Brazil
- Dental Research Division, Department of Periodontology and Restorative Dentistry, Guarulhos University UNIVERITAS/UNG, Guarulhos 07011-010, Sao Paulo, Brazil
- School of Dentistry, Sao Judas Tadeu University, Sao Paulo 05503-001, Sao Paulo, Brazil
| | - José Augusto Rodrigues
- Dental Research Division, Department of Periodontology and Restorative Dentistry, Guarulhos University UNIVERITAS/UNG, Guarulhos 07011-010, Sao Paulo, Brazil
- School of Dentistry, Sao Judas Tadeu University, Sao Paulo 05503-001, Sao Paulo, Brazil
| | - João Marcos Spessoto Pingueiro
- Dental Research Division, Department of Periodontology and Restorative Dentistry, Guarulhos University UNIVERITAS/UNG, Guarulhos 07011-010, Sao Paulo, Brazil
| | - Tatiane Tiemi Macedo
- Dental Research Division, Department of Periodontology and Restorative Dentistry, Guarulhos University UNIVERITAS/UNG, Guarulhos 07011-010, Sao Paulo, Brazil
| | - Magda Feres
- Dental Research Division, Department of Periodontology and Restorative Dentistry, Guarulhos University UNIVERITAS/UNG, Guarulhos 07011-010, Sao Paulo, Brazil
- Department of Oral Medicine, Infection, and Immunity, Division of Periodontology, Harvard School of Dental Medicine, Boston, MA 02115, USA
| | - Jamil Awad Shibli
- Dental Research Division, Department of Periodontology and Restorative Dentistry, Guarulhos University UNIVERITAS/UNG, Guarulhos 07011-010, Sao Paulo, Brazil
| | - Bruno Bueno-Silva
- Dental Research Division, Department of Periodontology and Restorative Dentistry, Guarulhos University UNIVERITAS/UNG, Guarulhos 07011-010, Sao Paulo, Brazil
- Department of Biosciences, Piracicaba Dental School, University of Campinas-UNICAMP, Piracicaba 13414-903, Sao Paulo, Brazil
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Tonprasong W, Inokoshi M, Tamura M, Hatano K, Minakuchi S. Impact of surface pre-reacted glass ionomer filler eluate on lipase gene expression in Candida albicans: An in vitro study. Dent Mater J 2023; 42:49-54. [PMID: 36123045 DOI: 10.4012/dmj.2022-122] [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: 02/04/2023]
Abstract
Although a surface pre-reacted glass ionomer (S-PRG) exerts a suppressive effect on Candida albicans (C. albicans) activity and growth, its influence on the expression of the lipase gene (LIP) family including LIP1-LIP10, an indicator of clinical infection, has not yet been investigated. Therefore, in this study, we evaluated the effect of S-PRG filler eluates on LIP expression in C. albicans using real-time reverse-transcription polymerase chain reaction. Candida albicans was treated with an S-PRG filler diluted at ratios of 1:32 and 1:64 for 24 h at 37°C. The diluted S-PRG filler eluates (1:32) suppressed lipase activity in C. albicans by downregulating LIP5 (0.54±0.25 relative to that of the control) and LIP8 (0.35±0.074) expression after 24 h, which corresponded with decreased lipase activity. At a dilution factor of 1:64, there was no significant difference in LIP expression. Thus, the S-PRG filler eluate has potential to suppress fungal activity by downregulating LIP expression.
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Affiliation(s)
- Watcharapong Tonprasong
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Department of Restorative Dentistry, Faculty of Dentistry, Naresuan University
| | - Masanao Inokoshi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Muneaki Tamura
- Department of Microbiology and Immunology, Nihon University School of Dentistry
| | - Keita Hatano
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Shunsuke Minakuchi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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10
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Souza AF, Souza MT, Damasceno JE, Ferreira PVC, Alves de Cerqueira G, Baggio Aguiar FH, Marchi GM. Effects of the Incorporation of Bioactive Particles on Physical Properties, Bioactivity and Penetration of Resin Enamel Infiltrant. Clin Cosmet Investig Dent 2023; 15:31-43. [PMID: 36923270 PMCID: PMC10010126 DOI: 10.2147/ccide.s398514] [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: 11/29/2022] [Accepted: 03/01/2023] [Indexed: 03/11/2023] Open
Abstract
Purpose The resinous infiltrant lacks remineralizing activity. This research aimed to develop and evaluate bioactivity, physico-mechanical properties and penetration of resin infiltrants containing Biosilicate or nanohydroxyapatite. Methods Experimental resin infiltrant (ERI; 75/25 wt.% TEGDMA/BisEMA) was divided among the groups Pure Experimental (PE); ERI + Biosilicate 5 or 10% (Bio5; Bio10), ERI + 10% nanohydroxyapatite (Hap10), and Icon (DMG, Germany). Bioactivity was analyzed by SEM, EDS and FT-IR/ATR after soaking in SBF. Degree of conversion (DC), sorption and solubility (SO; SOL), flexural strength, modulus of elasticity (FS; E-modulus), contact angle (CA) and penetration were characterized. Extent of penetration was analyzed by treating white spot lesions (WSL) in human dental enamel samples with the infiltrants and subsequently analyzing specimens by confocal laser scanning microscopy. Data from each test were submitted to ANOVA and Tukey's tests (p < 0.01). Results SEM, EDS and FT-IR showed the formation of precipitates and increase in the rates of Ca and P in the groups with bioactive particles, after storage in SBF. Hap10 showed higher DC and CA values than all the other groups. Groups Bio5 and Bio10 showed CA values similar to those of Icon, higher SO and SOL values, and reduction in other properties. All infiltrants were capable of penetrating into the WSLs. Conclusion The incorporation of Biosilicate (5 or 10%) or nanohydroxyapatite (10%) into ERI induced mineral deposition on the surface and did not compromise infiltration and penetration into WSLs, however, compromising their physico-mechanical properties.
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Affiliation(s)
- Ana Ferreira Souza
- Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Piracicaba, São Paulo, Brasil
| | - Marina Trevelin Souza
- Laboratory of Vitreous Materials, Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brasil
| | - Janaína Emanuela Damasceno
- Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Piracicaba, São Paulo, Brasil
| | - Paulo Vitor Campos Ferreira
- Department of Restorative Dentistry, Dental Materials Division, Piracicaba Dental School, Campinas State University - UNICAMP, Piracicaba, São Paulo, Brasil
| | - Gabriela Alves de Cerqueira
- Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Piracicaba, São Paulo, Brasil
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Piracicaba, São Paulo, Brasil
| | - Giselle Maria Marchi
- Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Piracicaba, São Paulo, Brasil
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11
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Ionescu AC, Hahnel S, Chiari MDS, König A, Delvecchio P, Braga RR, Zambelli V, Brambilla E. TEGDMA-Functionalized Dicalcium Phosphate Dihydrate Resin-Based Composites Prevent Secondary Caries in an In Vitro Biofilm Model. J Funct Biomater 2022; 13:jfb13040232. [PMID: 36412873 PMCID: PMC9680503 DOI: 10.3390/jfb13040232] [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: 09/21/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 11/11/2022] Open
Abstract
This study evaluated the efficacy of experimental TEGDMA-functionalized dicalcium phosphate dihydrate (T-DCPD) filler-based resin-based composites (RBC) in preventing caries lesions around the restoration margins (secondary caries, SC). Standardized Class-II cavities were made in sound molars with the cervical margin in dentin. Cavities were filled with a commercial resin-modified glass-ionomer cement (RMGIC) or experimental RBCs containing a bisGMA-TEGDMA resin blend and one of the following inorganic fractions: 60 wt.% Ba glass (RBC-0); 40 wt.% Ba glass and 20 wt.% T-DCPD (RBC-20); or 20 wt.% Ba glass and 40 wt.% T-DCPD (RBC-40). An open-system bioreactor produced Streptococcus mutans biofilm-driven SC. Specimens were scanned using micro-CT to evaluate demineralization depths. Scanning electron microscopy and energy-dispersive X-ray spectroscopy characterized the specimen surfaces, and antimicrobial activity, buffering effect, and ion uptake by the biofilms were also evaluated. ANOVA and Tukey’s tests were applied at p < 0.05. RBC-0 and RBC-20 showed SC development in dentin, while RBC-40 and RMGIC significantly reduced the lesion depth at the restoration margin (p < 0.0001). Initial enamel demineralization could be observed only around the RBC-0 and RBC-20 restorations. Direct antibiofilm activity can explain SC reduction by RMGIC, whereas a buffering effect on the acidogenicity of biofilm can explain the behavior of RBC-40. Experimental RBC with CaP-releasing functionalized T-DCPD filler could prevent SC with the same efficacy as F-releasing materials.
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Affiliation(s)
- Andrei Cristian Ionescu
- Oral Microbiology and Biomaterials Laboratory, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Via Pascal, 36, 20133 Milan, Italy
- Correspondence:
| | - Sebastian Hahnel
- Clinic of Prosthodontics and Dental Materials Science, University of Leipzig, Liebigstraße 12, Haus 1, 04103 Leipzig, Germany
- Department of Prosthetic Dentistry, Regensburg University Medical Center, Universitätsklinikum Regensburg, Franz-Josef-Strauß-Allee 11, 93042 Regensburg, Germany
| | - Marina D. S. Chiari
- Department of Biomaterials and Oral Biology, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, Cidade Universitária, São Paulo 05508-900, SP, Brazil
| | - Andreas König
- Clinic of Prosthodontics and Dental Materials Science, University of Leipzig, Liebigstraße 12, Haus 1, 04103 Leipzig, Germany
| | - Paolo Delvecchio
- School of Medicine and Surgery, University of Milan-Bicocca, Via Cadore, 48, 20900 Monza, Italy
| | - Roberto Ruggiero Braga
- Department of Biomaterials and Oral Biology, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, Cidade Universitária, São Paulo 05508-900, SP, Brazil
| | - Vanessa Zambelli
- School of Medicine and Surgery, University of Milan-Bicocca, Via Cadore, 48, 20900 Monza, Italy
| | - Eugenio Brambilla
- Oral Microbiology and Biomaterials Laboratory, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Via Pascal, 36, 20133 Milan, Italy
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12
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Ge KX, Quock R, Chu CH, Yu OY. The preventive effect of glass ionomer restorations on new caries formation: A systematic review and meta-analysis. J Dent 2022; 125:104272. [PMID: 36038075 DOI: 10.1016/j.jdent.2022.104272] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/05/2022] [Accepted: 08/25/2022] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE To investigate the effectiveness of glass ionomer cement (GIC) restorations on preventing new caries in primary or permanent dentitions compared with other types of restorations. DATA Randomized controlled clinical trials evaluating caries experience increment or caries incidence in patients with GIC restorations, including conventional GIC (CGIC) and resin-modified GIC (RMGIC) restorations, were included. SOURCES A systematic search of publications in English was conducted in PubMed/Medline, Web of Science, Cochrane, and Scopus databases. STUDY SELECTION/RESULTS This review included 10 studies reporting caries preventive effect of GIC restorations and selected 5 studies for meta-analysis. Patients with GIC restorations showed lower caries incidence compared with other restorations in primary and permanent dentition [RR=0.67, 95% CI:0.55-0.82, p<0.0001]. Patients with CGIC restorations showed lower caries incidence compared with amalgam restorations [RR=0.57, 95% CI:0.43-0.76, p=0.0001] and RMGIC restorations [RR=0.70, 95% CI:0.56-0.87, p=0.002], but no statistical difference with composite resin restorations [RR=0.73, 95% CI:0.51-1.04, p=0.08] in primary dentition. Patients with RMGIC restorations showed no statistical differences of caries incidence compared with composite resin restorations in primary and permanent dentition [RR=0.83, 95% CI:0.56-1.22, p=0.33]. CONCLUSIONS GIC restorations presented a better preventive effect on new caries than other restorations did in primary and permanent dentitions. CGIC restorations presented a better caries preventive effect on new caries than RMGIC and amalgam restorations in primary dentitions did. RMGIC restorations showed similar preventing effect on new caries with composite resin restorations in primary and permanent dentitions. CLINICAL SIGNIFICANCE This review affirmed the potential of GIC in preventing new caries development in the dentition.
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Affiliation(s)
- Kelsey Xingyun Ge
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, S.A.R., China
| | - Ryan Quock
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, S.A.R., China; Department of Restorative Dentistry and Prosthodontics, School of Dentistry, The University of Texas Health Science Center at Houston, Texas, USA
| | - Chun-Hung Chu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, S.A.R., China
| | - Ollie Yiru Yu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, S.A.R., China.
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13
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Marovic D, Par M, Tauböck TT, Haugen HJ, Negovetic Mandic V, Wüthrich D, Burrer P, Zheng K, Attin T, Tarle Z, Boccaccini AR. Impact of Copper-Doped Mesoporous Bioactive Glass Nanospheres on the Polymerisation Kinetics and Shrinkage Stress of Dental Resin Composites. Int J Mol Sci 2022; 23:ijms23158195. [PMID: 35897771 PMCID: PMC9332616 DOI: 10.3390/ijms23158195] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 12/24/2022] Open
Abstract
We embedded copper-doped mesoporous bioactive glass nanospheres (Cu-MBGN) with antibacterial and ion-releasing properties into experimental dental composites and investigated the effect of Cu-MBGN on the polymerisation properties. We prepared seven composites with a BisGMA/TEGDMA (60/40) matrix and 65 wt.% total filler content, added Cu-MBGN or a combination of Cu-MBGN and silanised silica to the silanised barium glass base, and examined nine parameters: light transmittance, degree of conversion (DC), maximum polymerisation rate (Rmax), time to reach Rmax, linear shrinkage, shrinkage stress (PSS), maximum PSS rate, time to reach maximum PSS rate, and depth of cure. Cu-MBGN without silica accelerated polymerisation, reduced light transmission, and had the highest DC (58.8 ± 0.9%) and Rmax (9.8 ± 0.2%/s), but lower shrinkage (3 ± 0.05%) and similar PSS (0.89 ± 0.07 MPa) versus the inert reference (0.83 ± 0.13 MPa). Combined Cu-MBGN and silica slowed the Rmax and achieved a similar DC but resulted in higher shrinkage. However, using a combined 5 wt.% Cu-MBGN and silica, the PSS resembled that of the inert reference. The synergistic action of 5 wt.% Cu-MBGN and silanised silica in combination with silanised barium glass resulted in a material with the highest likelihood for dental applications in future.
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Affiliation(s)
- Danijela Marovic
- Department of Endodontics and Restorative Dentistry, University of Zagreb, 10000 Zagreb, Croatia; (V.N.M.); (Z.T.)
- Correspondence: (D.M.); (M.P.); Tel.: +385-14899203 (D.M. & M.P.)
| | - Matej Par
- Department of Endodontics and Restorative Dentistry, University of Zagreb, 10000 Zagreb, Croatia; (V.N.M.); (Z.T.)
- Correspondence: (D.M.); (M.P.); Tel.: +385-14899203 (D.M. & M.P.)
| | - Tobias T. Tauböck
- Department of Conservative and Preventive Dentistry, Centre for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (T.T.T.); (D.W.); (P.B.); (T.A.)
| | - Håvard J. Haugen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway;
| | - Visnja Negovetic Mandic
- Department of Endodontics and Restorative Dentistry, University of Zagreb, 10000 Zagreb, Croatia; (V.N.M.); (Z.T.)
| | - Damian Wüthrich
- Department of Conservative and Preventive Dentistry, Centre for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (T.T.T.); (D.W.); (P.B.); (T.A.)
| | - Phoebe Burrer
- Department of Conservative and Preventive Dentistry, Centre for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (T.T.T.); (D.W.); (P.B.); (T.A.)
| | - Kai Zheng
- Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China;
| | - Thomas Attin
- Department of Conservative and Preventive Dentistry, Centre for Dental Medicine, University of Zurich, 8032 Zurich, Switzerland; (T.T.T.); (D.W.); (P.B.); (T.A.)
| | - Zrinka Tarle
- Department of Endodontics and Restorative Dentistry, University of Zagreb, 10000 Zagreb, Croatia; (V.N.M.); (Z.T.)
| | - Aldo R. Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany;
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14
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Physical-chemical and microbiological performances of graphene-doped PMMA for CAD/CAM applications before and after accelerated aging protocols. Dent Mater 2022; 38:1470-1481. [PMID: 35810033 DOI: 10.1016/j.dental.2022.06.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 06/07/2022] [Accepted: 06/22/2022] [Indexed: 12/29/2022]
Abstract
OBJECTIVES Innovative, nanotechnologies-featuring dental materials for CAD/CAM applications are becoming available. However, the interaction with the oral environment poses critical challenges to their longevity. The present study evaluated specific physical-chemical properties and antimicrobial potential of a CAD/CAM graphene-doped resin before and after accelerated aging protocols. METHODS Graphene nanofibers (GNF)-doped (<50 ppm) PMMA (GPMMA) and control PMMA CAD/CAM discs were used. Specimens underwent aging procedures of their bulk (thermo- and load-cycling) and surface (24 h-immersion in absolute ethanol), then they were tested for flexural strength, ultimate tensile strength, sorption/solubility, and methyl-methacrylate elution. Surface characterization included x-ray diffraction, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, surface roughness, microhardness, and scanning electron microscopy (SEM). Adherence of Streptococcus mutans and Candida albicans, and biofilm formation (continuous-flow bioreactor) by the same strains and an artificial oral microcosm were investigated. RESULTS GNF-doping improved the physical-chemical bulk properties of the PMMA resin. Surface aging reduced microhardness and increased the roughness of both test and control materials. Surfaces displayed signs of swelling and degradation at SEM. Microbiological data of non-aged surfaces showed that GNF-doping significantly reduced biofilm formation by all tested strains despite having no impact on microbial adherence. After aging, microbial adherence was higher on GPMMA surfaces, while biofilm formation was not promoted. SIGNIFICANCE GNF-doping improved the material's performance and influenced its antimicrobial potential. This strategy seems a valuable option to overcome the effects of surface degradation induced by aging on the antimicrobial potential of PMMA resin.
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15
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Kumar D, Bolskar RD, Mutreja I, Jones RS. Methacrylate Polymers With “Flipped External” Ester Groups: A Review. FRONTIERS IN DENTAL MEDICINE 2022. [DOI: 10.3389/fdmed.2022.923780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Current resin composites have favorable handling and upon polymerization initial physical properties that allow for efficient material replacement of removed carious tooth structure. Dental resin composites have long term durability limitations due to the hydrolysis of ester bonds within the methacrylate based polymer matrix. This article outlines the importance of ester bonds positioned internal to the carbon-carbon double bond in current methacrylate monomers. Water and promiscuous salivary/bacterial esterase activity can initiate ester bond hydrolysis that can sever the polymer backbone throughout the material. Recent studies have custom synthesized, with the latest advances in modern organic chemical synthesis, a novel molecule named ethylene glycol bis (ethyl methacrylate) (EGEMA). EGEMA was designed to retain the reactive acrylate units. Upon intermolecular polymerization of vinyl groups, EGEMA ester groups are positioned outside the backbone of the polymer chain. This review highlights investigation into the degradation resistance of EGEMA using buffer, esterase, and microbial storage assays. Material samples of EGEMA had superior final physical and mechanical properties than traditional ethylene glycol dimethacrylate (EGDMA) in all degradation assays. Integrating bioinformatics-based biodegradation predictions to the experimental results of storage media analyzed by LC/GC-MS revealed that hydrolysis of EGEMA generated small amounts of ethanol while preserving the strength bearing polymer backbone. Prior studies support investigation into additional custom synthesized methacrylate polymers with “flipped external” ester groups. The long term goal is to improve clinical durability compared to current methacrylates while retaining inherent advantages of acrylic based chemistry, which may ease implementation of these novel methacrylates into clinical practice.
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16
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Effects of Sr/F-Bioactive Glass Nanoparticles and Calcium Phosphate on Monomer Conversion, Biaxial Flexural Strength, Surface Microhardness, Mass/Volume Changes, and Color Stability of Dual-Cured Dental Composites for Core Build-Up Materials. NANOMATERIALS 2022; 12:nano12111897. [PMID: 35683752 PMCID: PMC9181985 DOI: 10.3390/nano12111897] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 05/19/2022] [Accepted: 05/30/2022] [Indexed: 12/10/2022]
Abstract
This study prepared composites for core build-up containing Sr/F bioactive glass nanoparticles (Sr/F-BGNPs) and monocalcium phosphate monohydrate (MCPM) to prevent dental caries. The effect of the additives on the physical/mechanical properties of the materials was examined. Dual-cured resin composites were prepared using dimethacrylate monomers with added Sr/F-BGNPs (5 or 10 wt%) and MCPM (3 or 6 wt%). The additives reduced the light-activated monomer conversion by ~10%, but their effect on the conversion upon self-curing was negligible. The conversions of light-curing or self-curing polymerization of the experimental materials were greater than that of the commercial material. The additives reduced biaxial flexural strength (191 to 155 MPa), modulus (4.4 to 3.3), and surface microhardness (53 to 45 VHN). These values were comparable to that of the commercial material or within the acceptable range of the standard. The changes in the experimental composites’ mass and volume (~1%) were similar to that of the commercial comparison. The color change of the commercial material (1.0) was lower than that of the experimental composites (1.5–5.8). The addition of Sr/F-BGNPs and MCPM negatively affected the physical/mechanical properties of the composites, but the results were satisfactory except for color stability.
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17
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Komalsingsakul A, Srisatjaluk RL, Senawongse P. Effect of brushing on surface roughness, fluoride release, and biofilm formation with different tooth-colored materials. J Dent Sci 2022; 17:389-398. [PMID: 35028062 PMCID: PMC8739752 DOI: 10.1016/j.jds.2021.08.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/17/2021] [Indexed: 12/03/2022] Open
Abstract
Background/purpose Tooth brushing, material mechanical ageing procedure, is the most effective way in removing biofilm. The purpose of this study was to investigate the surface roughness, fluoride-release, and S. mutans biofilm formation on various tooth-colored restorative materials before and after brushing. Materials and methods Discs of materials, a nanocomposite (Filtek Z350XT; CO), a giomer (Beautifil II; GIOMER), a resin-modified glass-ionomer material (Fuji II LC; RMGI), and a conventional glass-ionomer material (Fuji IX GP Extra; GI), were prepared, polished with abrasive discs (SofLex), and divided into brushed and not brushed groups. The surface roughness of specimens was observed using a contact profilometer, fluoride-release was measured using a fluoride-specific ion electrode, and S. mutans biofilm formation, biovolume and live/dead cells, was observed under a confocal laser scanning microscope. Results Higher roughness was observed on GI and RMGI than on CO and GIOMER. Brushing had no effect on the roughness. The fluoride-release of GI and RMGI was higher than that of GIOMER. The fluoride-release decreased after brushing in all materials. The biovolume of S. mutans was not significantly different between GIOMER, RMGI and GI, while CO showed the highest. Brushing resulted in a higher biovolume for all materials, except CO, which showed no change. After brushing, all the tested materials demonstrated identical biovolumes. There were no significant differences in live/dead cells among all groups. Conclusion Brushing demonstrated a negative effect on the fluoride-release and biovolume of S. mutans biofilms for all tested materials except nanocomposites.
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Affiliation(s)
- Anisha Komalsingsakul
- Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | | | - Pisol Senawongse
- Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
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18
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Huang Q, Liang Z, Li J, Bai Y, He J, Lin Z. Size Dependence of Particulate Calcium Phosphate Fillers in Dental Resin Composites. ACS OMEGA 2021; 6:35057-35066. [PMID: 34963987 PMCID: PMC8697599 DOI: 10.1021/acsomega.1c05825] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 11/30/2021] [Indexed: 06/14/2023]
Abstract
Resin composites that consist of polymeric resins and functional fillers are commonly used as restorative materials for dental caries. Various types of calcium phosphates (CaPs) are studied as remineralizing fillers in the formulation of dental resin composites, which are generally inhibitory to demineralization of teeth, but the performance of resin composites has not yet been investigated comprehensively with respect to the size of CaP particles. In this study, the same tricalcium phosphate (TCP) particles within two different size ranges, the as-received TCP particles (TCP) and those resulted from grinding (TCP-G), were tested to determine the size dependence of CaP fillers in dental resin composites. The buffering capability, mechanical properties, ion release, antibacterial performance, and remineralization effect of TCP/TCP-G-containing composites were experimentally characterized and compared against two other commercial dental materials. The integration of micrometer-sized TCP particles resulted in a similar buffering effect and Ca2+/PO4 3- release behaviors compared to the resin composite containing much smaller TCP-G particles. The flexural strength of the TCP-G resin composite was lower than that of the TCP composite after immersion in water for 30 days. However, the TCP-G composite facilitated crystal deposition toward better gap-closing performance at the dentin-composite interface. This study explored detailed insights about the size effect of CaP fillers, which is useful for the development of functional dental resin composites and their clinical translation.
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Affiliation(s)
- Qiting Huang
- Hospital
of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China
- Guangdong
Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
| | - Zelin Liang
- Hospital
of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China
- Guangdong
Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
| | - Junda Li
- Hospital
of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China
- Guangdong
Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
| | - Ying Bai
- Guangdong
Engineering Technology Research Centre for Functional Biomaterials,
PCFM Lab, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Jingwei He
- College
of Materials Science and Engineering, South
China University of Technology, Guangzhou 510641, China
| | - Zhengmei Lin
- Hospital
of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, China
- Guangdong
Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
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19
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Fabritius-Vilpoux K, Enax J, Mayweg D, Meyer F, Herbig M, Raabe D, Fabritius HO. Ultrastructural changes of bovine tooth surfaces under erosion in presence of biomimetic hydroxyapatite. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2021. [DOI: 10.1680/jbibn.21.00017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Enamel and dentin are susceptible to acids from food sources leading to dental erosion, a global problem affecting millions of individuals. Particulate hydroxyapatite (HAP) on the tooth surface can influence the effects of acid attacks. Standardized bovine enamel and dentin samples with artificial saliva are used in an in vitro cyclic demineralization–remineralization protocol to analyze the structural changes experienced by tooth surfaces using high-resolution scanning electron microscopy and to evaluate the potential of a HAP-based oral care gel in the protection of teeth from erosive attacks. The interfaces between HAP particle and enamel HAP crystallites are investigated using focused ion beam preparation and transmission electron microscopy. The results show that erosion with phosphoric acid severely affects enamel crystallites and dentin tubules, while artificial saliva leads to remineralization effects. The HAP-gel forms a microscopic layer on both enamel and dentin surfaces. Upon acid exposure, this layer is sacrificed before the native tooth tissues are affected, leading to significantly lower degrees of demineralization compared to the controls. This demonstrates that the use of particulate HAP as a biomaterial in oral care formulations can help protect enamel and dentin surfaces from erosive attacks during meals using a simple and effective protection principle.
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Affiliation(s)
- Kathia Fabritius-Vilpoux
- Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
| | - Joachim Enax
- Research Department, Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany
| | - David Mayweg
- Department of Physics, Chalmers University of Technology, Göteborg, Sweden; Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
| | - Frederic Meyer
- Research Department, Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany
| | - Michael Herbig
- Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
| | - Dierk Raabe
- Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
| | - Helge-Otto Fabritius
- Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany; Bionics and Materials Development, Hamm-Lippstadt University of Applied Sciences, Hamm, Germany
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20
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Slimani A, Sauro S, Gatón Hernández P, Gurgan S, Turkun LS, Miletic I, Banerjee A, Tassery H. Commercially Available Ion-Releasing Dental Materials and Cavitated Carious Lesions: Clinical Treatment Options. MATERIALS 2021; 14:ma14216272. [PMID: 34771800 PMCID: PMC8585007 DOI: 10.3390/ma14216272] [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: 09/08/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 02/06/2023]
Abstract
The contemporary approach for operative caries management emphasizes personalized interventions for each patient, dependent upon the individual's caries susceptibility/risk, the stage of the carious lesion and its activity. The clinician's challenge is to optimize the extent of cavity preparation and the choice of dental restorative biomaterials, appreciating the benefits offered by ion-releasing restorative materials. There is a growing application of bioactive/bio-interactive materials in minimally invasive operative dentistry, as they may help with tissue recovery by ion release. In case of moderate or extensive occlusal cavitation, the clinical criteria include the individual caries susceptibility and carious lesion activity. In high caries risk cases, ion-releasing biomaterials (IRB) can be used, as well as for active carious lesions. In proximal lesions, the clinical criteria include the individual caries susceptibility, the lesion activity and presence of cavities with little or no enamel at the gingival margin. This article aims to discuss the restorative ion-releasing options, according to different clinical situations, and the caries susceptibility to manage cavitated carious lesions in permanent adult teeth.
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Affiliation(s)
- Amel Slimani
- LBN/Faculté d’Odontologie, Université de Montpellier, 34193 Montpellier, France;
| | - Salvatore Sauro
- Dental Biomaterials and Minimally Invasive Dentistry, Department of Dentistry, Cardenal Herrera-CEU University, CEU Universities, 46115 Valencia, Spain;
- Department of Therapeutic Dentistry, I. M. Sechenov First Moscow State Medical University, Moscow 119146, Russia
| | | | - Sevil Gurgan
- Department of Restorative Dentistry, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey;
| | | | - Ivana Miletic
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Gunduliceva ul. 5, 10000 Zagreb, Croatia;
| | - Avijit Banerjee
- Conservative & MI Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College London, London SE1 9RT, UK;
| | - Hervé Tassery
- LBN/Faculté d’Odontologie, Université de Montpellier, 34193 Montpellier, France;
- Ecole de Médecine Dentaire de Marseille, Université d’Aix-Marseille, 13385 Marseille, France
- Correspondence:
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21
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Mayanagi G, Yufang L, Hoshino T, Takahashi N. A water-soluble glass-based temporary restorative resin inhibited bacteria-induced pH reductions at the bacteria-material interface. Dent Mater J 2021; 41:95-100. [PMID: 34483202 DOI: 10.4012/dmj.2021-129] [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: 11/23/2022]
Abstract
This study aimed to evaluate the inhibitory effects of a water-soluble glass based temporary restorative resin (WSG-TRR) on bacteriainduced pH reductions at the bacteria-material interface. Each material (WSG-TRR, glass-ionomer cement, resin composite and conventional temporary restorative resin) was fixed to the bottom of the well of the experimental apparatus. The well was filled with pelleted cells of Streptococcus mutans, and the pH at the bacteria-material interface was monitored using a miniature pH electrode. The concentration of ions released from WSG-TRR and the effect of fluoride and zinc ions on bacteria-induced pH reduction was evaluated. The buffering capacities of WSG-TRR and WSG were also evaluated. At 90 min after the glucose addition, WSG-TRR exhibited the highest pH (5.29±0.12). Fluoride ion was detected at the interface between bacteria and WSG-TRR. Moreover, WSG were found to confer high buffering capacity. A WSG-TRR reduced bacteria-induced pH reductions at the bacteria-material interface.
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Affiliation(s)
- Gen Mayanagi
- Division of Oral Ecology and Biochemistry, Department of Oral Biology, Tohoku University Graduate School of Dentistry.,Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry
| | - Luo Yufang
- Division of Oral Ecology and Biochemistry, Department of Oral Biology, Tohoku University Graduate School of Dentistry.,School and hospital of Stomatology, Fujian Medical University
| | - Tomohiro Hoshino
- Department of Next-Generation Dental Material Engineering, Tohoku University Graduate School of Dentistry
| | - Nobuhiro Takahashi
- Division of Oral Ecology and Biochemistry, Department of Oral Biology, Tohoku University Graduate School of Dentistry
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22
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Schlafer S, Bornmann T, Paris S, Göstemeyer G. The impact of glass ionomer cement and composite resin on microscale pH in cariogenic biofilms and demineralization of dental tissues. Dent Mater 2021; 37:1576-1583. [PMID: 34419256 DOI: 10.1016/j.dental.2021.08.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/04/2021] [Accepted: 08/06/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Secondary caries is among the most frequent reasons for the failure of dental restorations. Glass ionomer cement (GIC) restorations have been proposed to protect the surrounding dental tissues from demineralization through the release of fluoride and by buffering the acid attack from dental biofilms. In contrast, the lack of buffering by composite resin (CR) restorations has been suggested as a promoting factor for the development of secondary caries. METHODS The present study employed transversal microradiography and confocal microscopy based pH ratiometry to quantify mineral loss and map microscale pH gradients inside Streptococcus mutans biofilms grown on compound specimens consisting of enamel, dentin and either GIC or CR. RESULTS Mineral loss in dentin was significantly lower next to GIC than next to CR, but no significant differences in local biofilm pH were observed between the two restorative materials. SIGNIFICANCE The cariostatic effect of GIC relies predominantly on the provision of fluoride and not on a direct buffering action. The lack of buffering by CR did not affect local biofilm pH and may therefore be of minor importance for secondary caries development.
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Affiliation(s)
- Sebastian Schlafer
- Section for Oral Ecology and Caries Control, Department of Dentistry and Oral Health, Aarhus University, Vennelyst Boulevard 9, 8000 Aarhus C, Denmark.
| | - Tanja Bornmann
- Section for Oral Ecology and Caries Control, Department of Dentistry and Oral Health, Aarhus University, Vennelyst Boulevard 9, 8000 Aarhus C, Denmark; Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
| | - Sebastian Paris
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
| | - Gerd Göstemeyer
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
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23
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Hatano K, Inokoshi M, Tamura M, Uo M, Shimizubata M, Tonprasong W, Wada T, Takahashi R, Imai K, Minakuchi S. Novel antimicrobial denture adhesive containing S-PRG filler. Dent Mater J 2021; 40:1365-1372. [PMID: 34234047 DOI: 10.4012/dmj.2020-443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The antimicrobial effects of denture adhesives containing novel surface pre-reacted glass-ionomer (S-PRG) fillers were assessed. We prepared denture adhesives containing S-PRG (particle sizes: 1 and 3 µm; quantities: 5, 7.5, and 10 wt%). We evaluated acid buffering capacity, ion release, and antimicrobial effects of denture adhesives with and without S-PRG. Significantly higher pH changes were observed in 1 µm S-PRG adhesives than in 3 µm S-PRG adhesives. Adhesives containing 7.5 and 10 wt% S-PRG exhibited significantly higher ion release than adhesives with 5 wt% S-PRG. The 1µm-10wt% S-PRG denture adhesive exhibited significantly lower colony-forming units on the denture adhesive contact surface than in the control group; additionally, it exhibited excellent acid buffering capacity, ion release properties, and antimicrobial effect against C. albicans, C. glabrata, S. mutans, and A. naeslundii. Longer contact periods resulted in significantly lower adhesion of Candida albicans to the denture base resin treated with denture adhesive.
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Affiliation(s)
- Keita Hatano
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Masanao Inokoshi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Muneaki Tamura
- Department of Microbiology, Nihon University School of Dentistry
| | - Motohiro Uo
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Makoto Shimizubata
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Watcharapong Tonprasong
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Takahiro Wada
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Rena Takahashi
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Kenichi Imai
- Department of Microbiology, Nihon University School of Dentistry
| | - Shunsuke Minakuchi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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Wanitwisutchai T, Monmaturapoj N, Srisatjaluk R, Subannajui K, Dechkunakorn S, Anuwongnukroh N, Pongprueksa P. Buffering capacity and antibacterial properties among bioactive glass-containing orthodontic adhesives. Dent Mater J 2021; 40:1169-1176. [PMID: 34078777 DOI: 10.4012/dmj.2020-375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study was to evaluate the acid-buffering capacity and antibacterial properties of orthodontic adhesives containing bioactive glasses (BAGs) (45S5, 45S5F, S53P4), Hydroxyapatite, beta-tricalcium phosphate, and Canasite. Fillers comprising 15 wt% bioactive glasses, HAp, β-TCP, and Canasite incorporated with 55 wt% silanated glass were added to a mixture of UDMA/TEGDMA. Acid-buffering capacity was tested by exposing disc-shaped samples of each adhesive to medium of bacteria-produced acids, and pH changes were recorded at 24 and 48 h. Antibacterial properties were assessed by indirect testing by exposing polymerized adhesive samples to a medium and direct testing by immersing the specimens in solutions containing S. mutans and S. sanguinis. A significant buffering capacity was shown by the 45S5, 45S5F and S53P4 BAG adhesives. The antibacterial properties were not significant in all experimental adhesives. Therefore, the experimental orthodontic adhesives containing BAGs demonstrated a significant buffering capacity but did not show significant antibacterial properties against S. mutans and S. sanguinis.
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Affiliation(s)
| | - Naruporn Monmaturapoj
- Assistive Technology and Medical Devices Research Center, National Science and Technology Development Agency
| | | | - Kittitat Subannajui
- Material Science and Engineering Program, Multi-Disciplinary Unit, Faculty of Science, Mahidol University
| | | | | | - Pong Pongprueksa
- Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University
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Zhou Y, Matin K, Shimada Y, Sadr A, Wang G, Tagami J, Feng X. Characteristics of biofilm-induced degradation at resin-dentin interfaces using multiple combinations of adhesives and resins. Dent Mater 2021; 37:1260-1272. [PMID: 33965251 DOI: 10.1016/j.dental.2021.04.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 04/04/2021] [Accepted: 04/24/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE We aimed to evaluate morphological, mechanical and chemical characteristics at resin-dentin interfaces using multiple combinations of adhesives and resins after a short-term biofilm-induced degradation. METHODS Cervical cavities were prepared in bovine incisors, treated by Clearfil SE Bond 2 (SE) or FL-Bond II (FL), restored by Clearfil Majesty ES Flow (ES) or Beautifil Flow Plus (BFP) and grouped into SE-ES, SE-BFP, FL-ES and FL-BFP. After biofilm challenge, interfacial gaps and dentin wall lesions were examined by optical coherence tomography (OCT). Gap depth (GD), gap pattern scale (GPS) and dentin wall lesion depth (WLD) were evaluated from confocal laser scanning microscope. Microhardness of dentin lesions was measured with a Vickers microhardness tester. Chemical elements in resins and dentin wall lesions were analyzed by scanning electron microscopy and energy dispersive X-ray spectrometry (SEM/EDS). Morphological structures of interfacial gaps were observed by SEM. RESULTS OCT could detect adhesive-dentin-bonded and adhesive-dentin-debonded gaps. SE-containing groups showed significantly lower GPS than FL-containing groups. FL-BFP showed significantly lower WLD than FL-ES. Microhardness of dentin wall lesions was higher than that of outer lesions and they showed significant differences in FL-BFP. SE-BFP showed a lower GPS curve and higher intensities of Ca and P in the upper half of dentin wall lesions than other groups. From SEM, microgaps between filler and matrix, break and loss of matrix, separation of adhesive matrix with hybrid layer occurred at interfacial gaps. SIGNIFICANCE The morphological, mechanical and chemical characteristics of resin-dentin interfacial degradation depend on the component and chemistry of restorative materials.
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Affiliation(s)
- Yuan Zhou
- Laboratory of Molecular and Preventive Dentistry, Department of Preventive Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Huangpu District, Shanghai 200011, China.
| | - Khairul Matin
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Endowed Department of International Oral Health Science (affiliated with Department of Translational Research), School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama-shi, Kanagawa 230-0063, Japan.
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Department of Operative Dentistry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8525, Japan.
| | - Alireza Sadr
- Biomimetics Biomaterials Biophotonics & Technology Laboratory, Department of Restorative Dentistry, University of Washington School of Dentistry, 1959 NE Pacific Street, Seattle, WA 98195-7456, USA.
| | - Guoqing Wang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, 1088 Xueyuan Ave, Nanshan District, Shenzhen, Guangdong 518055, China.
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
| | - Xiping Feng
- Laboratory of Molecular and Preventive Dentistry, Department of Preventive Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Huangpu District, Shanghai 200011, China.
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Spencer P, Ye Q, Kamathewatta NJB, Woolfolk SK, Bohaty BS, Misra A, Tamerler C. Chemometrics-Assisted Raman Spectroscopy Characterization of Tunable Polymer-Peptide Hybrids for Dental Tissue Repair. FRONTIERS IN MATERIALS 2021; 8:681415. [PMID: 34113623 PMCID: PMC8186416 DOI: 10.3389/fmats.2021.681415] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The interfaces that biological tissues form with biomaterials are invariably defective and frequently the location where failure initiates. Characterizing the phenomena that lead to failure is confounded by several factors including heterogeneous material/tissue interfaces. To seamlessly analyze across these diverse structures presents a wealth of analytical challenges. This study aims to develop a molecular-level understanding of a peptide-functionalized adhesive/collagen hybrid biomaterial using Raman spectroscopy combined with chemometrics approach. An engineered hydroxyapatite-binding peptide (HABP) was copolymerized in dentin adhesive and dentin was demineralized to provide collagen matrices that were partially infiltrated with the peptide-functionalized adhesive. Partial infiltration led to pockets of exposed collagen-a condition that simulates defects in adhesive/dentin interfaces. The spectroscopic results indicate that co-polymerizable HABP tethered to the adhesive promoted remineralization of the defects. The spatial distribution of collagen, adhesive, and mineral as well as crystallinity of the mineral across this heterogeneous material/tissue interface was determined using micro-Raman spectroscopy combined with chemometrics approach. The success of this combined approach in the characterization of material/tissue interfaces stems from its ability to extract quality parameters that are related to the essential and relevant portions of the spectral data, after filtering out noise and non-relevant information. This ability is critical when it is not possible to separate components for analysis such as investigations focused on, in situ chemical characterization of interfaces. Extracting essential information from complex bio/material interfaces using data driven approaches will improve our understanding of heterogeneous material/tissue interfaces. This understanding will allow us to identify key parameters within the interfacial micro-environment that should be harnessed to develop durable biomaterials.
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Affiliation(s)
- Paulette Spencer
- Institute for Bioengineering Research, University of Kansas, Lawrence, KS, United States
- Department of Mechanical Engineering, University of Kansas, Lawrence, KS, United States
- Bioengineering Program, University of Kansas, Lawrence, KS, United States
- Correspondence: Paulette Spencer, , Qiang Ye,
| | - Qiang Ye
- Institute for Bioengineering Research, University of Kansas, Lawrence, KS, United States
- Correspondence: Paulette Spencer, , Qiang Ye,
| | - Nilan J. B. Kamathewatta
- Institute for Bioengineering Research, University of Kansas, Lawrence, KS, United States
- Bioengineering Program, University of Kansas, Lawrence, KS, United States
| | - Sarah K. Woolfolk
- Institute for Bioengineering Research, University of Kansas, Lawrence, KS, United States
- Bioengineering Program, University of Kansas, Lawrence, KS, United States
| | - Brenda S. Bohaty
- Department of Pediatric Dentistry, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, United States
| | - Anil Misra
- Institute for Bioengineering Research, University of Kansas, Lawrence, KS, United States
- Department of Civil Engineering, University of Kansas, Lawrence, KS, United States
| | - Candan Tamerler
- Institute for Bioengineering Research, University of Kansas, Lawrence, KS, United States
- Department of Mechanical Engineering, University of Kansas, Lawrence, KS, United States
- Bioengineering Program, University of Kansas, Lawrence, KS, United States
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27
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Paszynska E, Pawinska M, Gawriolek M, Kaminska I, Otulakowska-Skrzynska J, Marczuk-Kolada G, Rzatowski S, Sokolowska K, Olszewska A, Schlagenhauf U, May TW, Amaechi BT, Luczaj-Cepowicz E. Impact of a toothpaste with microcrystalline hydroxyapatite on the occurrence of early childhood caries: a 1-year randomized clinical trial. Sci Rep 2021; 11:2650. [PMID: 33514787 PMCID: PMC7846568 DOI: 10.1038/s41598-021-81112-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 01/01/2021] [Indexed: 12/30/2022] Open
Abstract
The aim of this trial was to determine whether a toothpaste with microcrystalline hydroxyapatite is not inferior to a fluoride toothpaste in prevention of caries in children. This double-blinded randomized control trial compared two toothpastes regarding the occurrence of caries lesions using International Caries Detection and Assessment System (ICDAS) ≥ code 1 on the primary dentition within 336 days. The test group used a fluoride-free hydroxyapatite toothpaste three times daily while control group used a toothpaste with fluoride. 207 children were included in the intention-to-treat analysis; 177 of them finished the study per protocol. An increase in caries ICDAS ≥ code 1 per tooth was observed in 72.7% of the hydroxyapatite-group (n = 88), compared with 74.2% of the fluoride-group (n = 89). The exact one-sided upper 95% confidence limit for the difference in proportion of participants with ICDAS increase ≥ 1 (-1.4%) was 9.8%, which is below the non-inferiority margin of 20% demonstrating non-inferiority of hydroxyapatite compared to the fluoride control toothpaste. This RCT showed for the first time, that in children, the impact of the daily use of a toothpaste with microcrystalline hydroxyapatite on enamel caries progression in the primary dentition is not inferior to a fluoride control toothpaste (Clinical Trials NCT03553966).
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Affiliation(s)
- Elzbieta Paszynska
- Department of Integrated Dentistry, Poznan University of Medical Sciences, Poznan, Poland.
| | - Malgorzata Pawinska
- Department of Integrated Dentistry, Medical University of Bialystok, Białystok, Poland
| | - Maria Gawriolek
- Department of Integrated Dentistry, Poznan University of Medical Sciences, Poznan, Poland
| | - Inga Kaminska
- Department of Integrated Dentistry, Medical University of Bialystok, Białystok, Poland
| | | | | | - Szymon Rzatowski
- Department of Integrated Dentistry, Poznan University of Medical Sciences, Poznan, Poland
| | | | - Aneta Olszewska
- Department of Facial Malformation, Pediatric Dentistry Clinic, Poznan University of Medical Sciences, Poznan, Poland
| | - Ulrich Schlagenhauf
- Department of Conservative Dentistry and Periodontology, University Hospital Wuerzburg, Wuerzburg, Germany
| | - Theodor W May
- Society for Biometrics and Psychometrics, Bielefeld, Germany
| | - Bennett T Amaechi
- Department of Comprehensive Dentistry, School of Dentistry, University of Texas Health San Antonio, San Antonio, TX, USA
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Muduroglu R, Ionescu AC, Del Fabbro M, Scolavino S, Brambilla E. Distribution of adhesive layer in class II composite resin restorations before/after interproximal matrix application. J Dent 2020; 103:103494. [DOI: 10.1016/j.jdent.2020.103494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/28/2020] [Accepted: 10/03/2020] [Indexed: 12/15/2022] Open
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29
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Askar H, Krois J, Göstemeyer G, Schwendicke F. Secondary caries risk of different adhesive strategies and restorative materials in permanent teeth: Systematic review and network meta-analysis. J Dent 2020; 104:103541. [PMID: 33259888 DOI: 10.1016/j.jdent.2020.103541] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 11/25/2020] [Accepted: 11/26/2020] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES Secondary caries is a major long-term complication of dental restorations. Different adhesive strategies and restorative materials may affect secondary caries risk. We aimed to systematically review and synthesize the secondary caries risk of different adhesive strategies and restorative materials. SOURCES Medline via PubMed 01/2005-10/2019. STUDY SELECTION Randomized controlled studies with minimum 2 years follow-up, comparing different adhesive strategies and/or restorative materials in permanent teeth were included. Our outcome was the occurrence of secondary caries. Bayesian pairwise and network-meta-analysis were conducted. DATA We included 50 trials; 19 assessing secondary caries depending on different adhesive strategies, 31 on restorative materials. Studies were published between 2005 and 2017, largely of unclear risk of bias, and included a mean of 40 (range: 8-90) participants and 46 (range: 14-200) placed restorations. Mean follow-up was 43 (range: 24-180) months. Secondary caries was a rare event; the majority of studies did not find any lesions. Network meta-analysis found great uncertainty. 3-step etch-and-rinse adhesives showed the lowest risk of secondary caries, 2-step etch-and-rinse the highest. For restorative materials, resin-modified glass ionomer showed the lowest risk of secondary caries. Most resin composites showed similar risks. CONCLUSION Data from randomized trials comparing different adhesive strategies or restorative materials are extremely scarce. The differences between materials were limited over the observational period of the included studies. The yielded rankings should be interpreted with caution. CLINICAL SIGNIFICANCE Despite often claimed to be a major complication of restorations, there is surprisingly little data on secondary caries from randomized trials. Longer-term studies may be needed to identify differences in secondary caries risk between materials.
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Affiliation(s)
- Haitham Askar
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Joachim Krois
- Department of Oral Diagnostics, Digital Health and Health Services Research, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Gerd Göstemeyer
- Department of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Falk Schwendicke
- Department of Oral Diagnostics, Digital Health and Health Services Research, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
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Yu Z, Tao S, Xu HHK, Weir MD, Fan M, Liu Y, Zhou X, Liang K, Li J. Rechargeable adhesive with calcium phosphate nanoparticles inhibited long-term dentin demineralization in a biofilm-challenged environment. J Dent 2020; 104:103529. [PMID: 33189801 DOI: 10.1016/j.jdent.2020.103529] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 10/21/2020] [Accepted: 11/09/2020] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVES This study aims to investigate the long-term demineralization-inhibition capability of a rechargeable adhesive with nanoparticles of amorphous calcium phosphate (NACP) on dentin in a biofilm-challenged environment. METHODS The NACP adhesive was immersed in a pH 4 solution to exhaust calcium (Ca) and phosphate (P) ions and then recharged with Ca and P ions. Dentin samples were demineralized underStreptococcus mutans biofilms for 24 h and randomly divided into two groups: (1) dentin control, (2) dentin with recharged NACP adhesives. Each day, all the samples were immersed in brain heart infusion broth with 1% sucrose (BHIS) for 4 h, and then in artificial saliva (AS) for 20 h. This cycle was repeated for 10 days. The pH of BHIS, the Ca and P ions content of the BHIS and AS were measured daily. After 10 days, the lactic acid production and colony-forming units of the biofilms were tested. The changes of remineralization/demineralization were also analyzed. RESULTS Dentin in the control group showed further demineralization. The recharged NACP adhesive neutralized acids, increasing the pH to above 5, and released large amounts of Ca and P ions each day. The recharged NACP adhesive decreased the production of lactic acid (P < 0.05), inhibited dentin demineralization and sustained the dentin hardness in the biofilm-challenged environment, showing an excellent long-term demineralization-inhibition capability. CONCLUSIONS The NACP adhesive could continuously inhibit dentin demineralization in a biofilm-challenged environment by recharging with Ca and P ions. SIGNIFICANCE The rechargeable NACP adhesive could provide long-term dentin bond protection.
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Affiliation(s)
- Zhaohan Yu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Siying Tao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Hockin H K Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Menglin Fan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Yifang Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Kunneng Liang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
| | - Jiyao Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
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Cavazana TP, Pessan JP, Hosida TY, Sampaio C, Amarante VDOZ, Monteiro DR, Delbem ACB. Effects of Sodium Trimetaphosphate, Associated or Not with Fluoride, on the Composition and pH of Mixed Biofilms, before and after Exposure to Sucrose. Caries Res 2020; 54:358-368. [PMID: 32998137 DOI: 10.1159/000501262] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 05/31/2019] [Indexed: 11/19/2022] Open
Abstract
The aim of the present study was to evaluate the influence of sodium trimetaphosphate (TMP), associated or not with fluoride (F), on the concentrations of F, calcium (Ca), and phosphorus (P) and on the pH of mixed biofilms of Streptococcus mutans and Candida albicans, before and after exposure to sucrose. The biofilms received three treatments (72, 78, and 96 h after the beginning of their formation), at three TMP concentrations (0.25, 0.5, or 1%), with or without F at 500 ppm. Solutions containing 500 and 1,100 ppm F as well as artificial saliva were also tested as controls. Biofilm pH was measured and the concentrations of F, Ca, and P were determined (solid and fluid phases). In a parallel experiment, after the third treatment (96 h), the biofilms were exposed to a 20% sucrose solution to simulate a cariogenic challenge and the pH of the medium, F, Ca, P, and TMP were determined. The data were submitted by two-way ANOVA, followed by Fisher's least significant difference test (p < 0.05). Treatment with TMP and 500 ppm F led to higher F concentration in the biofilm fluid. Although TMP did not affect Ca concentrations, biofilms treated with TMP alone presented higher P concentrations. Treatment with 1% TMP and F led to the highest pH values of the biofilm, both before and after the cariogenic challenge. It was concluded that TMP increases F and P in the biofilm and that its presence promotes an increase in the pH of the medium, even after the cariogenic challenge.
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Affiliation(s)
- Thamires Priscila Cavazana
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Juliano Pelim Pessan
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Thayse Yumi Hosida
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Caio Sampaio
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | | | - Douglas Roberto Monteiro
- Graduate Program in Dentistry (GPD - Master's Degree), University of Western São Paulo (UNOESTE), Presidente Prudente, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil,
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Yao C, Ahmed MH, Li X, Nedeljkovic I, Vandooren J, Mercelis B, Zhang F, Van Landuyt KL, Huang C, Van Meerbeek B. Zinc-Calcium-Fluoride Bioglass-Based Innovative Multifunctional Dental Adhesive with Thick Adhesive Resin Film Thickness. ACS APPLIED MATERIALS & INTERFACES 2020; 12:30120-30135. [PMID: 32530270 DOI: 10.1021/acsami.0c06865] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Apart from producing high bond strength to tooth enamel and dentin, a dental adhesive with biotherapeutic potential is clinically desirable, aiming to further improve tooth restoration longevity. In this laboratory study, an experimental two-step universal adhesive, referred to as Exp_2UA, applicable in both the etch-and-rinse (E&R) and self-etch (SE) modes and combining a primer, containing 10-methacryloyloxydecyldihydrogen phosphate as a functional monomer with chemical binding potential to hydroxyapatite, with a bioglass-containing hydrophobic adhesive resin, was multifactorially investigated. In addition to primary property assessment, including measurement of bond strength, water sorption, solubility, and polymerization efficiency, the resultant adhesive-dentin interface was characterized by transmission electron microscopy (TEM), the filler composition was analyzed by energy-dispersive X-ray spectroscopy, and the bioactive potential of the adhesive was estimated by measuring the long-term ion release and assessing its antienzymatic and antibacterial potential. Four representative commercial adhesives were used as reference/controls. Application in both the E&R and SE modes resulted in a durable bonding performance to dentin, as evidenced by favorable 1 year aged bond strength data and a tight interfacial ultrastructure that, as examined by TEM, remained ultramorphologically unaltered upon 1 year of water storage aging. TEM revealed a 20 μm thick hydrophobic adhesive layer with a homogeneous bioglass filler distribution. Adequate polymerization conversion resulted in extremely low water sorption and solubility. In situ zymography revealed reduced endogenous proteolytic activity, while Streptococcus mutans biofilm formation was inhibited. In conclusion, the three-/two-step E&R/SE Exp_2UA combines the high bonding potential and bond degradation resistance with long-term ion release, rendering the adhesive antienzymatic and antibacterial potential.
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Affiliation(s)
- Chenmin Yao
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), , 3000 Leuven, Belgium
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School & Hospital of Stomatology, Wuhan University, 430079 Wuhan, China
| | - Mohammed H Ahmed
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), , 3000 Leuven, Belgium
- Faculty of Dentistry, Department of Dental Biomaterials, Tanta University, 31511 Tanta, Egypt
| | - Xin Li
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), , 3000 Leuven, Belgium
| | - Ivana Nedeljkovic
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), , 3000 Leuven, Belgium
- Department of Dental Material Sciences, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, The Netherlands
| | - Jennifer Vandooren
- Laboratory of Immunobiology, Rega Institute for Medical Research, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Ben Mercelis
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), , 3000 Leuven, Belgium
| | - Fei Zhang
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), , 3000 Leuven, Belgium
- Department of Materials Engineering, KU Leuven (University of Leuven), 3001 Leuven, Belgium
| | - Kirsten L Van Landuyt
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), , 3000 Leuven, Belgium
| | - Cui Huang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School & Hospital of Stomatology, Wuhan University, 430079 Wuhan, China
| | - Bart Van Meerbeek
- Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, KU Leuven (University of Leuven), , 3000 Leuven, Belgium
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Shimizubata M, Inokoshi M, Wada T, Takahashi R, Uo M, Minakuchi S. Basic properties of novel S-PRG filler-containing cement. Dent Mater J 2020; 39:963-969. [PMID: 32611989 DOI: 10.4012/dmj.2019-317] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study was aimed to evaluate the effect of a novel surface pre-reacted glass-ionomer (S-PRG) filler-containing cement for root caries. We prepared the cements using five different S-PRG filler amounts (0, 10, 20, 30, and 40 wt%). Compressive strength, ion release, acid buffering capacity, and microstructure of the as-prepared cements were evaluated. The compressive strength was statistically significant; it was highest for 0 wt% S-PRG cement. Ion release in 0 wt% S-PRG was highest for F- and Al, whereas in 40 wt% S-PRG it was highest for B. For 20, 30, and 40 wt% S-PRG cements, Na and Sr release was higher compared to the other ions. The acid buffering capacity was significantly higher in the 40 wt% S-PRG cement than in the others. In the microstructural analysis, no difference of surface structure was observed among each of the S-PRG filler contents (0-40 wt% S-PRG).
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Affiliation(s)
- Makoto Shimizubata
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Masanao Inokoshi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Takahiro Wada
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Rena Takahashi
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Motohiro Uo
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo
| | - Shunsuke Minakuchi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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The forgotten merits of GIC restorations: a systematic review. Clin Oral Investig 2020; 24:2189-2201. [DOI: 10.1007/s00784-020-03334-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 05/08/2020] [Indexed: 12/13/2022]
Abstract
Abstract
Objective
To reevaluate proven strengths and weakness of glass ionomer cements (GICs) and to identify agreement versus conflicting evidence in previous reports regarding the transition between GIC and the tooth, and the existence of an “interphase”.
Materials and methods
Relevant electronic databases (PubMed, Embase via Ovid and Medline via Web of science) were searched for publications of evidence relating to the transition zone at the GIC-tooth interphase. Studies were examined and grouped according to characteristics of GIC-tooth attachment area quantified by X-ray and optical microscopy techniques in 2D and 3D.
Results
Inclusion criteria comprised of in vitro studies that showed images of the conventional GIC-tooth substrate attachments using at least one of the following techniques: SEM, CLSM, or μCT. The search identified 419 studies, from which 33 were included. Ten studies demonstrated the existence of an interphase layer and five studies quantified the layer thickness (1–15 μ). Twenty-nine publications studied different failure modes of the GIC-tooth interphase. Eleven studies described discontinuities inside the GIC bulk.
Conclusion
The GIC-tooth interphase attributes evolve with time. Good attachment is evident even under compromised surface preparation. The GIC-tooth attachment area is resistant to acidic dissolution as compared to both tooth and GIC bulk. In general, studies revealed mostly intact GIC-tooth interphases with only some cracked interphases.
Clinical significance
GIC bonds to the tooth structure and forms an acid resistant attachment zone that might enhance caries inhibition. Due to fluoride release and ease of use, GIC provides a cost effective treatment, ideal for low income or high caries populations.
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Ionescu AC, Cazzaniga G, Ottobelli M, Garcia-Godoy F, Brambilla E. Substituted Nano-Hydroxyapatite Toothpastes Reduce Biofilm Formation on Enamel and Resin-Based Composite Surfaces. J Funct Biomater 2020; 11:jfb11020036. [PMID: 32492906 PMCID: PMC7353493 DOI: 10.3390/jfb11020036] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/09/2020] [Accepted: 05/21/2020] [Indexed: 01/09/2023] Open
Abstract
Background: Toothpastes containing nano-hydroxyapatite (n-HAp) substituted with metal ions provide calcium and phosphate ions to dental hard tissues, reducing demineralization, and promoting remineralization. Few data are available about the effect of these bioactive compounds on oral microbiota. Methods: This in vitro study evaluated the influence of two commercially-available substituted n-HAp-based toothpastes (α: Zn-carbonate substituted n-HAp; β: F, Mg, Sr-carbonate substituted n-HAp) on early colonization (EC, 12 h) and biofilm formation (BF, 24 h) by oral microbiota. Controls were brushed with distilled water. Artificial oral microcosm and Streptococcus mutans biofilms were developed using human enamel and a resin-based composite (RBC) as adherence surfaces. Two test setups, a shaking multiwell plate and a modified drip-flow reactor (MDFR), were used to simulate clinical conditions during the night (low salivary flow and clearance) and daytime, respectively. Energy-dispersive X-ray spectrometry (EDS) was used to evaluate specimens' surfaces after toothpaste treatment. Fluoride release from β toothpaste was evaluated. Viable adherent biomass was quantified by MTT assay, and biofilms' morphology was highlighted using confocal microscopy. Results: EDS showed the presence of remnants from the tested toothpastes on both adherence surfaces. β toothpaste showed significantly lower EC and BF compared to control using the artificial oral microcosm model, while α toothpaste showed lower EC and BF compared to control, but higher EC and BF compared to β toothpaste. The effect shown by β toothpaste was, to a minimal extent, due to fluoride release. Interestingly, this result was seen on both adherence surfaces, meaning that the tested toothpastes significantly influenced EC and BF even on RBC surfaces. Furthermore, the effect of toothpaste treatments was higher after 12 h than 24 h, suggesting that toothbrushing twice a day is more effective than brushing once. Conclusions: The efficacy of these treatments in reducing microbial colonization of RBC surfaces may represent a promising possibility in the prevention of secondary caries.
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Affiliation(s)
- Andrei C. Ionescu
- Oral Microbiology and Biomaterials Laboratory, Department of Biomedical, Surgical and Dental Sciences, University of Milan, via Pascal 36, 20133 Milan, Italy; (G.C.); (M.O.); (E.B.)
- Correspondence: ; Tel.: +39-0250319007
| | - Gloria Cazzaniga
- Oral Microbiology and Biomaterials Laboratory, Department of Biomedical, Surgical and Dental Sciences, University of Milan, via Pascal 36, 20133 Milan, Italy; (G.C.); (M.O.); (E.B.)
| | - Marco Ottobelli
- Oral Microbiology and Biomaterials Laboratory, Department of Biomedical, Surgical and Dental Sciences, University of Milan, via Pascal 36, 20133 Milan, Italy; (G.C.); (M.O.); (E.B.)
| | - Franklin Garcia-Godoy
- Bioscience Research Center and Clinical Research, College of Dentistry, University of Tennessee Health Science Center, 875 Union Avenue, Memphis, TN 38163, USA;
| | - Eugenio Brambilla
- Oral Microbiology and Biomaterials Laboratory, Department of Biomedical, Surgical and Dental Sciences, University of Milan, via Pascal 36, 20133 Milan, Italy; (G.C.); (M.O.); (E.B.)
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36
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Resin composite blocks for dental CAD/CAM applications reduce biofilm formation in vitro. Dent Mater 2020; 36:603-616. [DOI: 10.1016/j.dental.2020.03.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 02/18/2020] [Accepted: 03/12/2020] [Indexed: 11/23/2022]
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A New Customized Bioactive Glass Filler to Functionalize Resin Composites: Acid-Neutralizing Capability, Degree of Conversion, and Apatite Precipitation. J Clin Med 2020; 9:jcm9041173. [PMID: 32325886 PMCID: PMC7230164 DOI: 10.3390/jcm9041173] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 01/19/2023] Open
Abstract
This study introduced an experimental bioactive glass (BG) with a lower Na2O content than conventional BG 45S5 (10.5 wt% vs. 24.5 wt%), additionally containing CaF2 (12 wt%) and a network connectivity similar to that of BG 45S5. A series of experimental composites functionalized with 5-40 wt% of the novel BG was prepared and compared to a corresponding series of experimental composites functionalized with 5-40 wt% of BG 45S5. Commercial acidneutralizing materials (alkasite, giomer, and glass ionomer) were used as references. The capabilities of the materials to neutralize hydrochloric acid (pH = 2.6) and lactic acid (pH = 4.5) were evaluated by real-time pH measurements over 1 h. The degree of conversion and precipitation of calcium phosphate were also investigated. Data were analyzed using one-way and Welch ANOVA at an overall level of significance of 0.05. The acid-neutralizing potential of the experimental BG incorporated into resin composites was generally comparable to that of BG 45S5, and better than that of a giomer and glass ionomer. Fluorine was identified in the precipitate that developed on the composites functionalized with the experimental BG, suggesting a capability of forming fluorapatite. Unlike the 45S5 composition, the experimental BG did not impair the degree of conversion of resin composites. The novel BG filler is therefore an interesting candidate for future investigations of caries-preventive resin composites, and their potential clinical applicability for restorative, preventive, and orthodontic purposes.
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Cieplik F, Rupp CM, Hirsch S, Muehler D, Enax J, Meyer F, Hiller KA, Buchalla W. Ca 2+ release and buffering effects of synthetic hydroxyapatite following bacterial acid challenge. BMC Oral Health 2020; 20:85. [PMID: 32199447 PMCID: PMC7085149 DOI: 10.1186/s12903-020-01080-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 03/13/2020] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Synthetic particulate hydroxyapatite (HAP; Ca5(PO4)3(OH)) is used as ingredient in oral care products but its effects on cariogenic biofilms are not clear yet. The primary mode of action of HAP may be acting as a calcium phosphate reservoir when deposited in oral biofilms and release Ca2+ and (hydrogen) phosphate ions upon bacterial acid challenge. The aim of this in vitro study was to test this hypothesis by investigating release of Ca2+ ions and potential buffering effects from HAP upon bacterial acid challenge in planktonic cultures and biofilms of Streptococcus mutans. METHODS Planktonic cultures of S. mutans were grown in BHI broth with 1% sucrose or with additional 5% HAP or 5% silica for up to 48 h. Separately, biofilms of S. mutans were grown in BHI for 72 h in total. After 24 h of this biofilm culture, either BHI alone or BHI with additional 0.5% HAP or 0.5% silica was added. After 48 h, BHI with 1% sucrose was added to allow bacterial acid formation. Ca2+ release was determined colorimetrically and pH measurements were performed using a pH electrode. For statistical analysis, non-parametrical procedures were applied (n ≥ 10; Mann-Whitney U test; α = 0.05). RESULTS Relevant release of Ca2+ was only evident in planktonic cultures or biofilms with HAP but not in both other groups (p ≤ 0.001). In suspended biofilms with HAP, median pH was 4.77 after 72 h and about 0.5 pH units higher as compared to both other groups (4.28 or 4.32, respectively; p ≤ 0.001). CONCLUSIONS Under the tested conditions, synthetic HAP releases Ca2+ ions upon bacterial acid challenge and may also show some buffering capacity but further studies are needed to investigate whether the concentrations tested here can also be reached clinically in dental biofilms.
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Affiliation(s)
- Fabian Cieplik
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany.
| | - Christina M Rupp
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Stefanie Hirsch
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Denise Muehler
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Joachim Enax
- Oral Care Research Department, Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany
| | - Frederic Meyer
- Oral Care Research Department, Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany
| | - Karl-Anton Hiller
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Wolfgang Buchalla
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
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Sudradjat H, Meyer F, Loza K, Epple M, Enax J. In Vivo Effects of a Hydroxyapatite-Based Oral Care Gel on the Calcium and Phosphorus Levels of Dental Plaque. Eur J Dent 2020; 14:206-211. [PMID: 32283562 PMCID: PMC7274817 DOI: 10.1055/s-0040-1708456] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES Particulate hydroxyapatite (HAP; Ca5(PO4)3(OH)) is a biomimetic oral care ingredient. One mode of action in caries-susceptible individuals may be the adhesion/incorporation of HAP into dental plaque. Therefore, the aim of this in vivo study was to analyze the 3-day effects of a newly developed hydroxyapatite-based oral care gel on the calcium and phosphorus levels within the dental plaque of children. MATERIALS AND METHODS This study was conducted in Kebon Padangan at Bali in Indonesia. Thirty-four children (mean age, 8.9 years; mean DMF-T [decayed, missing, and filled teeth; permanent teeth], 0.6; mean dmft-t [primary teeth] 4.5) were included in the study. The gel was applied thrice for 3 days by an experienced dentist. Dental plaque was collected at baseline and after the study. Levels of calcium and phosphorus of plaque samples were analyzed by energy-dispersive X-ray spectroscopy. STATISTICAL ANALYSIS Medians for both calcium and phosphorus levels were calculated (baseline and 3-day application of HAP-gel). RESULTS The calcium level increased after 3 days of application of the HAP-gel from 0.25 wt% (median) to 0.40 wt% (median), while the phosphorus level increased from 1.17 wt% (median) to 1.41 wt% (median). However, variations in both calcium and phosphorus levels measured in the pooled dental plaque samples were high. CONCLUSION Within the limitations of the study, the 3-day application of the oral HAP-gel in children increased the median of both calcium and phosphorus levels in plaque. Consequently, a positive influence on the remineralization/demineralization process is very likely.
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Affiliation(s)
- Henny Sudradjat
- Department for Dentistry, Health Care Center, Braunschweig, Germany
| | - Frederic Meyer
- Research Department, Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Joachim Enax
- Research Department, Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany
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Viana Í, Alania Y, Feitosa S, Borges AB, Braga RR, Scaramucci T. Bioactive Materials Subjected to Erosion/Abrasion and Their Influence on Dental Tissues. Oper Dent 2020; 45:E114-E123. [PMID: 32053454 DOI: 10.2341/19-102-l] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate the effect of erosion or erosion-abrasion on bioactive materials and adjacent enamel/dentin areas. METHODS AND MATERIALS Enamel and dentin blocks (4×4×2 mm) were embedded side by side in acrylic resin, and a standardized cavity (1.2×4×1.5 mm) was prepared between them. Preparations were restored with the following materials: composite resin (Filtek Z350, control); experimental composite containing di-calcium phosphate dihydrate particles (DCPD); Giomer (Beautifil II), high viscosity glass ionomer cement (GIC, Fuji IX); and a resin-modified GIC (Fuji II LC). The specimens were submitted to two cycling models (n=10): erosion or erosion-abrasion. The challenges consisted of five-minute immersion in 0.3% citric acid solution, followed by 60-minute exposure to artificial saliva. Toothbrushing was carried out twice daily, 30 minutes after the first and last exposures to acid. Dental and material surface loss (SL, in μm) were determined by optical profilometry. Data were analyzed with Kruskal-Wallis and Dunn tests (α=0.05). RESULTS Under erosion, for enamel, only the GIC groups presented lower SL values than Z350 (p<0.001 for Fuji IX and p=0.018 for Fuji II LC). For dentin, none of the materials showed significantly lower SL values than Z350 (p>0.05). For material, the GICs had significantly higher SL values than those of Z350 (p<0.001 for Fuji IX and p=0.002 for Fuji II LC). Under erosion-abrasion, the enamel SL value was significantly lower around Fuji II LC compared with the other materials (p<0.05). No significant differences were observed among groups for dentin SL (p=0.063). The GICs and Giomer showed higher SL values than Z350 (p<0.001 for the GICs and p=0.041 for Giomer). CONCLUSION Both GIC-based materials were susceptible to erosive wear; however, they promoted the lowest erosive loss of adjacent enamel. Against erosion-abrasion, only Fuji II LC was able to reduce enamel loss. For dentin, none of the materials exhibited a significant protective effect.
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Karadas M, Atıcı MG. Bond strength and adaptation of pulp capping materials to dentin. Microsc Res Tech 2020; 83:514-522. [DOI: 10.1002/jemt.23440] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 12/17/2019] [Accepted: 12/27/2019] [Indexed: 01/04/2023]
Affiliation(s)
- Muhammet Karadas
- Department of Restorative Dentistry, Faculty of DentistryRecep Tayyip Erdogan University Rize Turkey
| | - Makbule Gamze Atıcı
- Department of Restorative Dentistry, Faculty of DentistryRecep Tayyip Erdogan University Rize Turkey
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Matsuo K, Yoshihara K, Nagaoka N, Makita Y, Obika H, Okihara T, Matsukawa A, Yoshida Y, Van Meerbeek B. Rechargeable anti-microbial adhesive formulation containing cetylpyridinium chloride montmorillonite. Acta Biomater 2019; 100:388-397. [PMID: 31568874 DOI: 10.1016/j.actbio.2019.09.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 09/11/2019] [Accepted: 09/26/2019] [Indexed: 12/15/2022]
Abstract
Long-term anti-bacterial effect is a desired ability of any dental material in combating tooth caries as one of the most common and widespread persistent diseases today. Among several cationic quaternary ammonium compounds with antiseptic properties, cetylpyridinium chloride (CPC) is often used in mouthrinses and toothpastes. In this study, we incorporated CPC in a soft phyllosilicate mineral (clay), referred to as montmorillonite (Mont), to enable gradual CPC release with rechargeability. Besides measuring CPC release and recharge, we examined the anti-bacterial effect, cytotoxicity and bonding effectiveness of five experimental adhesive formulations, prepared by adding 1 and 3 wt% CPC_Mont, 3 wt% Mont (without CPC), and 1 and 3 wt% CPC (without Mont) to the commercial adhesive Clearfil S3 Bond ND Quick ('C-S3B'; Kuraray Noritake). Strong inhibition of Streptococcus mutans biofilm formation by CPC_Mont adhesives was confirmed by optical density and SEM. CPC release from CPC_Mont adhesives was higher and lasted longer than from CPC adhesives, while CPC_Mont adhesives could also be recharged with CPC upon immersion in 2 wt% CPC. In conclusion, CPC_Mont technology rendered adhesives anti-bacterial properties with recharge ability, this without reducing its bonding potential, neither increasing its cytotoxicity. STATEMENT OF SIGNIFICANCE: Dental caries is one of the most prevalent chronic diseases in the population worldwide and is the major cause of tooth loss. In this study, we developed cetylpyridinium chloride (CPC) loaded montmorillonite (CPC-Mont) with a long-term antibacterial efficacy to prevent caries. CPC is an antibacterial agent approved by FDA, used as an OTC drug and contained in oral hygiene aids. CPC-Mont was incorporated in a dental adhesive to gradually release CPC. CPC_Mont technology rendered adhesives anti-bacterial properties with rechargeability, this without reducing its bonding potential, neither increasing its cytotoxicity.
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Spencer P, Ye Q, Song L, Parthasarathy R, Boone K, Misra A, Tamerler C. Threats to adhesive/dentin interfacial integrity and next generation bio-enabled multifunctional adhesives. J Biomed Mater Res B Appl Biomater 2019; 107:2673-2683. [PMID: 30895695 PMCID: PMC6754319 DOI: 10.1002/jbm.b.34358] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 02/07/2019] [Accepted: 02/20/2019] [Indexed: 12/27/2022]
Abstract
Nearly 100 million of the 170 million composite and amalgam restorations placed annually in the United States are replacements for failed restorations. The primary reason both composite and amalgam restorations fail is recurrent decay, for which composite restorations experience a 2.0-3.5-fold increase compared to amalgam. Recurrent decay is a pernicious problem-the standard treatment is replacement of defective composites with larger restorations that will also fail, initiating a cycle of ever-larger restorations that can lead to root canals, and eventually, to tooth loss. Unlike amalgam, composite lacks the inherent capability to seal discrepancies at the restorative material/tooth interface. The low-viscosity adhesive that bonds the composite to the tooth is intended to seal the interface, but the adhesive degrades, which can breach the composite/tooth margin. Bacteria and bacterial by-products such as acids and enzymes infiltrate the marginal gaps and the composite's inability to increase the interfacial pH facilitates cariogenic and aciduric bacterial outgrowth. Together, these characteristics encourage recurrent decay, pulpal damage, and composite failure. This review article examines key biological and physicochemical interactions involved in the failure of composite restorations and discusses innovative strategies to mitigate the negative effects of pathogens at the adhesive/dentin interface. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B:2466-2475, 2019.
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Affiliation(s)
- Paulette Spencer
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
- Department of Mechanical Engineering, University of Kansas,1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Qiang Ye
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Linyong Song
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Ranganathan Parthasarathy
- Department of Civil Engineering, Tennessee State University, 3500 John A Merritt Blvd, Nashville, TN 37209, USA
| | - Kyle Boone
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Anil Misra
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
- Department of Civil Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Candan Tamerler
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
- Department of Mechanical Engineering, University of Kansas,1530 W. 15th Street, Lawrence, KS 66045-7609, USA
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Ionescu A, Brambilla E, Hahnel S. Does recharging dental restorative materials with fluoride influence biofilm formation? Dent Mater 2019; 35:1450-1463. [PMID: 31400984 DOI: 10.1016/j.dental.2019.07.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 06/28/2019] [Accepted: 07/15/2019] [Indexed: 10/26/2022]
Abstract
OBJECTIVES To investigate the influence of recharging dental restorative materials with fluoride on biofilm formation. METHODS Specimens produced from a high-viscosity glass ionomer cement (HVGIC), a resin-modified glass ionomer cement (RMGIC), and a resin-based composite (RBC) were randomly allotted to incubation in artificial saliva either for one week (AS-1), for five weeks (AS-5), for five weeks including twice/day brushing with 1450ppm NaF toothpaste (AS-5-brush), or one-time exposition to 5000ppm NaF after five weeks of incubation (AS-5-exp). Human enamel was used as reference. Surface roughness and the release of fluoride from the specimens was determined; biofilm formation was simulated using mono- or multispecies microbiological models and analysed employing an MTT-based approach and confocal laser-scanning microscopy. RESULTS Monospecies biofilm formation was significantly reduced on HVGIC in comparison to RMGIC and RBC. It was also reduced on HVGIC and enamel after treatment with fluoride in groups AS-5-brush and AS-5-exp in comparison to AS-5. These effects were particularly pronounced after 24h, and less pronounced after 48h of biofilm formation. In the multispecies microbiological model, similar observations were identified for HVGIC, while for enamel a significant reduction in biofilm formation was observed in groups AS-5-brush and AS-5-exp. No significant effect of fluoride treatments was identified for RMGIC and RBC, regardless of the microbiological model applied. SIGNIFICANCE These data indicate that biofilm formation on the surfaces of a glass ionomer cement and enamel can be relevantly influenced by treatment with fluoride. Enamel may serve as a fluoride reservoir which requires regular recharge.
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Affiliation(s)
- Andrei Ionescu
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Italy
| | - Eugenio Brambilla
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Italy
| | - Sebastian Hahnel
- Poliklinik für Zahnärztliche Prothetik und Werkstoffkunde, Leipzig University, Leipzig, Germany.
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Nedeljkovic I, De Munck J, Vanloy A, Declerck D, Lambrechts P, Peumans M, Teughels W, Van Meerbeek B, Van Landuyt KL. Secondary caries: prevalence, characteristics, and approach. Clin Oral Investig 2019; 24:683-691. [PMID: 31123872 DOI: 10.1007/s00784-019-02894-0] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 04/03/2019] [Indexed: 12/29/2022]
Abstract
OBJECTIVES The objectives of this cross-sectional survey were to determine the prevalence of secondary caries (SC) in general population, to identify patient- and material-related factors which may affect the prevalence, and to describe some clinical characteristics of SC lesions. MATERIALS AND METHODS A total of 4036 restorations in 450 patients, who visited the university dental clinic for a regular (half) yearly checkup, were examined clinically (and radiographically) for the presence of SC. Clinical characteristics of the detected SC lesions (size, activity, and location) and the planned treatment were recorded. In addition, patients' caries-risk status was assessed according to the modified "cariogram" model. RESULTS In total, 146 restorations were diagnosed with SC, which gives an overall prevalence of 3.6%. Restorative material, restoration class, patient's caries risk, and smoking habits were shown to be important factors, as SC prevalence was significantly higher with composites, class II restorations, high-caries-risk patients, and smokers. Restorations' gingival margins were most frequently affected by SC. The largest number of restorations with SC (72%) was scheduled for the replacement. CONCLUSIONS Prevalence of SC was higher with composite than with amalgam restorations, irrespective of the patient's caries-risk status. Gingival margins of class II, including MOD restorations, seem to be the place of less resistance to SC development. Management of SC seems to place a considerable burden on the health care workforce and expenditure. CLINICAL RELEVANCE Secondary caries (SC) is considered to be the main cause of dental restoration failure and one of the biggest clinical challenges related to dental composites. Nevertheless, its prevalence in daily practice is still not clear, which impedes an accurate estimation of its impact on health care costs.
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Affiliation(s)
- Ivana Nedeljkovic
- Department of Oral Health Sciences, KU Leuven BIOMAT, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Jan De Munck
- Department of Oral Health Sciences, KU Leuven BIOMAT, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Anouk Vanloy
- Department of Oral Health Sciences, KU Leuven BIOMAT, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Dominique Declerck
- Department of Oral Health Sciences, KU Leuven Population Oral Health Studies, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Paul Lambrechts
- Department of Oral Health Sciences, KU Leuven BIOMAT, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Marleen Peumans
- Department of Oral Health Sciences, KU Leuven BIOMAT, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Wim Teughels
- Department of Oral Health Sciences , Oral Microbiology, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Bart Van Meerbeek
- Department of Oral Health Sciences, KU Leuven BIOMAT, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Kirsten L Van Landuyt
- Department of Oral Health Sciences, KU Leuven BIOMAT, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium.
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Parthasarathy R, Misra A, Song L, Ye Q, Spencer P. Structure-property relationships for wet dentin adhesive polymers. Biointerphases 2018; 13:061004. [PMID: 30558430 PMCID: PMC6296910 DOI: 10.1116/1.5058072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Revised: 11/27/2018] [Accepted: 11/28/2018] [Indexed: 12/23/2022] Open
Abstract
Dentin adhesive systems for composite tooth restorations are composed of hydrophilic/hydrophobic monomers, solvents, and photoinitiators. The adhesives undergo phase separation and concomitant compositional change during their application in the wet oral environment; phase separation compromises the quality of the hybrid layer in the adhesive/dentin interface. In this work, the adhesive composition in the hybrid layer can be represented using the phase boundaries of a ternary phase diagram for the hydrophobic monomer/hydrophilic monomer/water system. The polymer phases, previously unaccounted for, play an important role in determining the mechanical behavior of the bulk adhesive, and the chemomechanical properties of the phases are intimately related to the effects produced by differences in the hydrophobic-hydrophilic composition. As the composition of the polymer phases varies from hydrophobic-rich to hydrophilic-rich, the amount of the adsorbed water and the nature of polymer-water interaction vary nonlinearly and strongly correlate with the change in elastic moduli under wet conditions. The failure strain, loss modulus, and glass transition temperature vary nonmonotonically with composition and are explained based upon primary and secondary transitions observed in dynamic mechanical testing. Due to the variability in composition, the assignment of mechanical properties and the choice of suitable constitutive models for polymer phases in the hybrid layer are not straightforward. This work investigates the relationship between composition and chemomechanical properties of the polymer phases formed on the water-adhesive phase boundary using quasistatic and dynamic mechanical testing, mass transfer experiments, and vibrational spectroscopy.
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Affiliation(s)
- Ranganathan Parthasarathy
- Department of Civil and Architectural Engineering, Tennessee State University, 3500 John A Merritt Blvd, Nashville, Tennessee 37209
| | - Anil Misra
- Department of Civil and Environmental Engineering, Institute for Bioengineering Research, University of Kansas, 5104B Learned Hall, 1530 W 15th Street, Lawrence, Kansas 66045
| | - Linyong Song
- Institute for Bioengineering Research, University of Kansas, 5104A Learned Hall, 1530 W 15th Street, Lawrence, Kansas 66045
| | - Qiang Ye
- Institute for Bioengineering Research, University of Kansas, 5101E Learned Hall, 1530 W 15th Street, Lawrence, Kansas 66045
| | - Paulette Spencer
- Department of Mechanical Engineering, Institute for Bioengineering Research, University of Kansas, 3111 Learned Hall, 1530 W 15th Street, Lawrence, Kansas 66045
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Hao Y, Huang X, Zhou X, Li M, Ren B, Peng X, Cheng L. Influence of Dental Prosthesis and Restorative Materials Interface on Oral Biofilms. Int J Mol Sci 2018; 19:E3157. [PMID: 30322190 PMCID: PMC6213966 DOI: 10.3390/ijms19103157] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/29/2018] [Accepted: 10/10/2018] [Indexed: 01/17/2023] Open
Abstract
Oral biofilms attach onto both teeth surfaces and dental material surfaces in oral cavities. In the meantime, oral biofilms are not only the pathogenesis of dental caries and periodontitis, but also secondary caries and peri-implantitis, which would lead to the failure of clinical treatments. The material surfaces exposed to oral conditions can influence pellicle coating, initial bacterial adhesion, and biofilm formation, due to their specific physical and chemical characteristics. To define the effect of physical and chemical characteristics of dental prosthesis and restorative material on oral biofilms, we discuss resin-based composites, glass ionomer cements, amalgams, dental alloys, ceramic, and dental implant material surface properties. In conclusion, each particular chemical composition (organic matrix, inorganic filler, fluoride, and various metallic ions) can enhance or inhibit biofilm formation. Irregular topography and rough surfaces provide favorable interface for bacterial colonization, protecting bacteria against shear forces during their initial reversible binding and biofilm formation. Moreover, the surface free energy, hydrophobicity, and surface-coating techniques, also have a significant influence on oral biofilms. However, controversies still exist in the current research for the different methods and models applied. In addition, more in situ studies are needed to clarify the role and mechanism of each surface parameter on oral biofilm development.
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Affiliation(s)
- Yu Hao
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Cariology and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Xiaoyu Huang
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Cariology and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Cariology and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Mingyun Li
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Biao Ren
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Xian Peng
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
| | - Lei Cheng
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
- Department of Cariology and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
- National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China.
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Song L, Ge X, Ye Q, Boone K, Xie SX, Misra A, Tamerler C, Spencer P. Modulating pH through lysine integrated dental adhesives. Dent Mater 2018; 34:1652-1660. [PMID: 30201287 DOI: 10.1016/j.dental.2018.08.293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/07/2018] [Accepted: 08/27/2018] [Indexed: 10/28/2022]
Abstract
OBJECTIVES The objective of this study was to explore the effect of lysine integration to dental adhesives with respect to the polymerization kinetics, neutralization capacities in the acidic microenvironment, dynamic mechanical properties, and thermal properties. MATERIALS AND METHOD Lysine was incorporated into liquid resin formulations at 2.5 and 5.0wt % with additional water/ethanol co-solvents. The co-monomer system contained 2-hydroxyethyl-methacrylate (HEMA) and Bisphenol A glycerolate dimethacrylate (BisGMA) with a mass ratio of 45/55. The kinetics of photopolymerization, neutralization capacities, lysine-leaching, dynamic mechanical properties and thermal properties of the control and experimental adhesives were analyzed. RESULTS The degree of conversion of the experimental adhesive was increased substantially at 2.5wt% lysine as compared to the control. The experimental polymers provided acute neutralization of the acidic microenvironment. Approximately half of the lysine was released from the polymer network within one month. Under dry conditions and physiologic temperatures, the incorporation of lysine did not compromise the storage modulus. Comparison of the thermal properties suggests that the more compact structure of the control adhesive inhibits movement of the polymer chains resulting in increased Tg. SIGNIFICANCE Incorporating lysine in the adhesive formulations led to promising results regarding modulating pH, which may serve as one aspect of a multi-spectrum approach for enhancing the durability of composite restorations. The results provide insight and lay a foundation for incorporating amino acids or peptides into adhesive formulations for pH modulation or desired bioactivity at the interfacial margin between the composite and tooth.
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Affiliation(s)
- Linyong Song
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Xueping Ge
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Qiang Ye
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Kyle Boone
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Sheng-Xue Xie
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Anil Misra
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; Department of Civil Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Candan Tamerler
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; Department of Mechanical Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Paulette Spencer
- Institute for Bioengineering Research, School of Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; Department of Mechanical Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA.
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Sauro S, Watson T, Moscardó AP, Luzi A, Feitosa VP, Banerjee A. The effect of dentine pre-treatment using bioglass and/or polyacrylic acid on the interfacial characteristics of resin-modified glass ionomer cements. J Dent 2018; 73:32-39. [PMID: 29609016 DOI: 10.1016/j.jdent.2018.03.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/25/2018] [Accepted: 03/29/2018] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE To evaluate the effect of load-cycle aging and/or 6 months artificial saliva (AS) storage on bond durability and interfacial ultramorphology of resin-modified glass ionomer cement (RMGIC) applied onto dentine air-abraded using Bioglass 45S5 (BAG) with/without polyacrylic acid (PAA) conditioning. METHODS RMGIC (Ionolux, VOCO) was applied onto human dentine specimens prepared with silicon-carbide abrasive paper or air-abraded with BAG with or without the use of PAA conditioning. Half of bonded-teeth were submitted to load cycling (150,000 cycles) and half immersed in deionised water for 24 h. They were cut into matchsticks and submitted immediately to microtensile bond strength (μTBS) testing or 6 months in AS immersion and subsequently μTBS tested. Results were analysed statistically by two-way ANOVA and Student-Newman-Keuls test (α = 0.05). Fractographic analysis was performed using FE-SEM, while further RMGIC-bonded specimens were surveyed for interfacial ultramorphology characterisation (dye-assisted nanoleakage) using confocal microscopy. RESULTS RMGIC applied onto dentine air-abraded with BAG regardless PAA showed no significant μTBS reduction after 6 months of AS storage and/or load cycling (p > 0.05). RMGIC-dentine interface showed no sign of degradation/nanoleakage after both aging regimens. Conversely, interfaces created in PAA-conditioned SiC-abraded specimens showed significant reduction in μTBS (p < 0.05) after 6 months of storage and/or load cycling with evident porosities within bonding interface. CONCLUSIONS Dentine pre-treatment using BAG air-abrasion might be a suitable strategy to enhance the bonding performance and durability of RMGIC applied to dentine. The use of PAA conditioner in smear layer-covered dentine may increase the risk of degradation at the bonding interface. CLINICAL SIGNIFICANCE A combined dentine pre-treatment using bioglass followed by PAA may increase the bond strength and maintain it stable over time. Conversely, the use of PAA conditioning alone may offer no significant contribute to the immediate and prolonged bonding performance.
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Affiliation(s)
- Salvatore Sauro
- Dental Biomaterials, Preventive & Minimally Invasive Dentistry, Departamento de Odontologia, CEU Carndenal Herrera University, Valencia, Spain; Tissue Engineering and Biophotonics Research Division, King's College London Dental Institute, King's College London, United Kingdom.
| | - Timothy Watson
- Tissue Engineering and Biophotonics Research Division, King's College London Dental Institute, King's College London, United Kingdom
| | | | - Arlinda Luzi
- Dental Biomaterials, Preventive & Minimally Invasive Dentistry, Departamento de Odontologia, CEU Carndenal Herrera University, Valencia, Spain
| | | | - Avijit Banerjee
- Tissue Engineering and Biophotonics Research Division, King's College London Dental Institute, King's College London, United Kingdom; Department of Conservative & MI Dentistry, King's College London Dental Institute, King's College London, United Kingdom
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Zhou X, Wang S, Peng X, Hu Y, Ren B, Li M, Hao L, Feng M, Cheng L, Zhou X. Effects of water and microbial-based aging on the performance of three dental restorative materials. J Mech Behav Biomed Mater 2018; 80:42-50. [DOI: 10.1016/j.jmbbm.2018.01.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 01/18/2018] [Accepted: 01/22/2018] [Indexed: 12/12/2022]
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