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Perarivalan I, Karunakaran J, Anbalagan N, Harishma S, Prasad V. Matrix metalloproteinase inhibitors in restorative dentistry. JOURNAL OF CONSERVATIVE DENTISTRY AND ENDODONTICS 2024; 27:566-571. [PMID: 38989495 PMCID: PMC11232771 DOI: 10.4103/jcde.jcde_199_24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 07/12/2024]
Abstract
Matrix metalloproteinases (MMPs) have been identified as agents that disintegrate the collagen structures of dental hybrid layers, resulting in reduced restorative bond strength. Multiple MMP inhibitors (MMPIs) are known to counteract this degenerative mechanism, thereby preserving bond strength and promoting the longevity of resin-based restorations. Additionally, literature suggests that certain MMPI materials possess antimicrobial/anticariogenic properties, potentially reducing the risk of secondary caries development. Therefore, this review article aims to narrate on the integration of matrix metalloproteinase inhibitors into adhesive systems and their impact on bond strength.
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Affiliation(s)
- I Perarivalan
- Department of Conservative Dentistry and Endodontics, Chettinad Dental College and Research Institute, Kelambakkam, Tamil Nadu, India
| | - Janani Karunakaran
- Department of Conservative Dentistry and Endodontics, Chettinad Dental College and Research Institute, Kelambakkam, Tamil Nadu, India
| | - Nathashri Anbalagan
- Department of Conservative Dentistry and Endodontics, Chettinad Dental College and Research Institute, Kelambakkam, Tamil Nadu, India
| | - S Harishma
- Department of Conservative Dentistry and Endodontics, Chettinad Dental College and Research Institute, Kelambakkam, Tamil Nadu, India
| | - Vishnu Prasad
- Department of Conservative Dentistry and Endodontics, Chettinad Dental College and Research Institute, Kelambakkam, Tamil Nadu, India
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Beckman CKDC, de Lima Costa T, Puppin-Rontani RM, de Castilho ARF. Exploring the role of flavonoids in caries-affected dentin adhesion: A comprehensive scoping review. Arch Oral Biol 2024; 162:105942. [PMID: 38452415 DOI: 10.1016/j.archoralbio.2024.105942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/31/2024] [Accepted: 02/26/2024] [Indexed: 03/09/2024]
Abstract
OBJECTIVES The aim of this scoping review was to evaluate the available scientific evidence regarding the use of flavonoids in the treatment of caries-affected dentin focusing on bonding to dentin. METHODS A comprehensive literature search was performed in five databases from March 2022 and updated in April 2023: PubMed, EMBASE, Scopus, Web of Science, and Scielo. Additionally, the references of included studies were manually searched. Gray literature was excluded from the review. STUDY SELECTION Inclusion criteria included in vitro, in situ, and in vivo studies (animal or human) published in English. Abstracts, reviews, case reports, book chapters, doctoral dissertations, guidelines, and studies using pure plant extracts were excluded. Data collected from the selected studies were summarized and subjected to narrative and descriptive analysis. Out of the 91 studies identified, only 16 studies met the inclusion criteria. RESULTS The review analyzed eight different flavonoids (hesperidin, galardin, proanthocyanidin, genipin, quercetin, naringin, epigallocatechin-3-gallate, and other catechins subtypes) used as pretreatment or loaded into adhesive systems, primers, and phosphoric acid. The use of flavonoids improved the mechanical properties of the materials and modified the biological properties of the dentin, reducing collagen loss by the inhibition of proteolytic activity of matrix metalloproteinases (MMPs). CONCLUSIONS Based on the findings of this scoping review, it can be concluded that the use of flavonoids as pretreatment or incorporation into dental materials preserves collagen in the hybrid layer, inhibiting the MMPs activities, modifying the collagen fibrils of the dentin matrix and improving the mechanical properties of the dental adhesive systems. Therefore, it represents a promising approach for promoting dentin biomodification. This can result in more stable bonding of adhesive restorations to caries-affected dentin.
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Affiliation(s)
- Camilla Karoline de Carvalho Beckman
- Departamento de Ciências da Saúde e Odontologia Infantil, Área de Odontopediatria, Faculdade de Odontologia de Piracicaba (FOP) - Universidade Estadual de Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Tainá de Lima Costa
- Departamento de Ciências da Saúde e Odontologia Infantil, Área de Odontologia Preventiva eSaúde Pública, Faculdade de Odontologia de Piracicaba (FOP) - Universidade Estadual de Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Regina Maria Puppin-Rontani
- Departamento de Ciências da Saúde e Odontologia Infantil, Área de Odontopediatria, Faculdade de Odontologia de Piracicaba (FOP) - Universidade Estadual de Campinas (UNICAMP), Piracicaba, SP, Brazil; Departamento de Odontologia Restauradora, Área de Materiais Dentários, Faculdade de Odontologia de Piracicaba (FOP) - Universidade Estadual de Campinas (UNICAMP), Piracicaba, SP, Brazil
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Comba A, Baldi A, Pucci R, Rolando C, Alovisi M, Pasqualini D, Scotti N. Effects of Etching Time and Ethanol Wet Bonding on Bond Strength and Metalloproteinase Activity in Radicular Dentin. J Clin Med 2024; 13:2474. [PMID: 38731002 PMCID: PMC11084777 DOI: 10.3390/jcm13092474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/13/2024] [Accepted: 03/22/2024] [Indexed: 05/13/2024] Open
Abstract
(1) Background: The objective of this in vitro study was to evaluate the impact of different etching times and ethanol pre-treatments on the immediate bond strength of a hydrophilic multi-mode universal adhesive (Clearfil Universal Bond Quick, Kuraray, UBQ) and on the consequent gelatinolytic activity of metalloproteinases (MMPs) on radicular dentin. (2) Methods: Sixty single-root teeth were selected and divided into four groups according to the adhesive protocol applied for fiber post cementation: (G1) 15 s H3PO4 application + UBQ; (G2) 30 s H3PO4 application + UBQ; (G3) 15 s H3PO4 application + ethanol pre-treatment + UBQ; (G4) 30 s H3PO4 + ethanol pre-treatment + UBQ. After adhesive procedures, fiber posts were luted into the post space with a dual-curing cement (DC Core, Kuraray) and light-cured for 40 s. To perform the push-out test and nanoleakage analyses for both coronal end apical areas, 1 mm slices were prepared, following a 24 h storage period in artificial saliva. Additionally, an in situ zymographic assay was conducted to explore endogenous MMP activity within the radicular layer. Results were statistically analyzed with ANOVA and Tukey post hoc tests. Statistical significance was set at p < 0.05. (3) Result: ANOVA revealed a statistically significant difference in push-out bond strength related to the pre-treatment variable but did not highlight any significance of etching time. Specimens pre-treated with ethanol wet bond application showed higher bond strength (p < 0.01). In situ zymography quantification analyses revealed that all tested groups, independently of etching time end ethanol pre-treatment, activated MMP gelatinolytic activity. A significant increase in MMP activity was detected for the 30 s etching time. However, ETOH pre-treatment significantly reduced MMP activity within the adhesive interface (p < 0.01). (4) Conclusions: The tested adhesive showed similar results regardless of the etching time protocol. The gelatinolytic activity of MMPs was observed in all the groups. Further investigations and extended follow-ups are required to validate the results of the present study in vivo.
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Affiliation(s)
| | | | | | | | | | | | - Nicola Scotti
- Department of Surgical Sciences, Dental School Lingotto, University of Turin, 10100 Turin, Italy; (A.C.); (A.B.); (R.P.); (C.R.); (M.A.); (D.P.)
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Wang Y, Zong Z, Ding N, Zhang Z. Polyvinylpyrrolidone as a primer for resin-dentin bonding. J Mech Behav Biomed Mater 2024; 150:106281. [PMID: 38048714 DOI: 10.1016/j.jmbbm.2023.106281] [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: 10/06/2023] [Revised: 11/23/2023] [Accepted: 11/26/2023] [Indexed: 12/06/2023]
Abstract
OBJECTIVE This study aimed to investigate the effects of polyvinylpyrrolidone (PVP)-containing primer (PCP) on dentin bonding. METHODS PVP and anhydrous ethanol were used to prepare the PCPs, which were prepared at concentrations of 0.5%, 1%, and 2% (w/v). These PCPs were subsequently applied to the dentin surface, denoted as E1, E2, and E3, respectively. In the control group, no primer was applied. Following the treatment, the dentin surfaces were subjected to analysis using Fourier-transform infrared spectroscopy (FTIR), and the micro-tensile bond strength (MTBS) was evaluated. The failure mode, nanoleakage, and bonding longitudinal section were observed utilizing scanning electron microscopy (SEM). Additionally, the effect of PCPs on matrix metalloproteinases (MMPs) activity was analyzed through an in situ zymography test. Data were subjected to statistical analysis using ANOVA tests (α = 0.05). RESULTS Significant alterations in the infrared resonances associated with collagen cross-linking within the collagen matrix were observed across all PCP groups. The application of PCP demonstrated a noteworthy enhancement in micro-tensile bond strength (MTBS) compared to group C (p < 0.05). Notably, group C exhibited the lowest MTBS (41 ± 7.7 MPa), whereas group E2 demonstrated the highest MTBS (66 ± 11.9 MPa). Even after undergoing aging, the MTBS of the PCP groups remained superior to that of group C (p < 0.05). The resin tag length in the PCP groups was found to be greater than that of group C, and the occurrence of nanoleakage was comparatively lower in the PCP groups, both before and after aging. Additionally, PCP exhibited a dose-dependent inhibition of matrix metalloproteinases (MMPs) activity, which was statistically significant (p < 0.05). CONCLUSIONS The utilization of PCP Primer exhibits notable enhancements in bond strength, mitigates nano-leakage, and suppresses enzyme activity within the hybrid layer.
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Affiliation(s)
- Yaoxin Wang
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, China.
| | - Zhenyu Zong
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, China.
| | - Ning Ding
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, China.
| | - Zutai Zhang
- Beijing Institute of Dental Research, School of Stomatology, Capital Medical University, Beijing, 100050, China.
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Ng TYK, Lee AHC, Chang JWW, Leung WSF, Cen R, Cheung GSP, Zhang C. Effect of MMP Inhibitors on the Bond Strength of Fibre Posts After Ageing. Int Dent J 2023; 73:834-839. [PMID: 37230841 PMCID: PMC10658439 DOI: 10.1016/j.identj.2023.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/07/2023] [Accepted: 04/30/2023] [Indexed: 05/27/2023] Open
Abstract
AIM This in vitro study aimed to evaluate the effect of matrix metalloproteinase (MMP) inhibitors on the bond strength of resin-cemented fibre posts to radicular dentin under an aged-loaded condition. MATERIALS AND METHODS Radicular dentin was prepared and irrigated by MMP inhibitor solution after root canal obturation in 60 extracted single-rooted teeth based on 6 groups: (1) 2% chlorhexidine (CHX) + loaded; (2) CHX + unloaded; (3) 0.5% benzalkonium chloride (BAC) + loaded; (4) BAC + unloaded; (5) 17% ethylenediaminetetraacetic acid (EDTA) + loaded; and (6) EDTA + unloaded. After final rinsing, all specimens were sliced cross-sectionally and kept in a water bath for 12 months of ageing. Groups 1, 3, and 5 were subjected to cyclic loading. Push-out tests were conducted using a universal testing machine, and failure mode was examined. The data were analysed using 3-way analysis of variance and post hoc tests at α = 0.05. RESULTS BAC + unloaded demonstrated the highest mean bond strength (3.12 ± 0.18 MPa; P < .001), while the BAC + loaded and CHX + loaded groups showed a significantly lower push-out bond strength than their unloaded counterparts. Mixed adhesive-cohesive failure was the most common failure mode observed. CONCLUSIONS Without cycling loading, BAC was superior to CHX and EDTA in preserving the bond strength of resin-cemented fibre posts after 12 months of ageing. Loading significantly weakened the effectiveness of BAC and CHX in preserving the bond strength.
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Affiliation(s)
- Tai Yin Kelvin Ng
- Restorative Dental Sciences, Endodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, P. R. China
| | - Angeline Hui Cheng Lee
- Restorative Dental Sciences, Endodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, P. R. China
| | - Jeffrey Wen Wei Chang
- Restorative Dental Sciences, Endodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, P. R. China
| | - Wing See Fiona Leung
- Restorative Dental Sciences, Endodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, P. R. China
| | - Rong Cen
- Restorative Dental Sciences, Endodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, P. R. China
| | - Gary Shun Pan Cheung
- Restorative Dental Sciences, Endodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, P. R. China
| | - Chengfei Zhang
- Restorative Dental Sciences, Endodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, P. R. China.
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Fan-Chiang YS, Chou PC, Hsiao YW, Cheng YH, Huang Y, Chiu YC, Lin YJ, Mine Y, Feng SW, Lee IT, Peng TY. Optimizing Dental Bond Strength: Insights from Comprehensive Literature Review and Future Implications for Clinical Practice. Biomedicines 2023; 11:2995. [PMID: 38001996 PMCID: PMC10669570 DOI: 10.3390/biomedicines11112995] [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: 10/13/2023] [Revised: 10/26/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023] Open
Abstract
This review examines the modifying factors affecting bond strength in various bonding scenarios, particularly their relevance to the longevity of dental restorations. Understanding these factors is crucial for improving clinical outcomes in dentistry. Data were gathered from the PubMed database, ResearchGate, and Google Scholar resources, covering studies from 1992 to 2022. The findings suggest that for dentin-resin bonds, minimizing smear layers and utilizing MMP inhibitors to prevent hybrid layer degradation are essential. In the case of resin-resin bonds, reversing blood contamination is possible, but preventing saliva contamination is more challenging, underscoring its critical importance during clinical procedures. Additionally, while pretreatment on ceramics has minimal impact on bond strength, the influence of specific colorings should be carefully considered in treatment planning. This comprehensive review highlights that although established practices recognize significant bond strength factors, ongoing research provides valuable insights to enhance the clinical experience for patients. Once confirmed through rigorous experimentation, these emerging findings should be swiftly integrated into dental practice to improve patient outcomes.
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Affiliation(s)
- Yung-Shin Fan-Chiang
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Peng-Chen Chou
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yu-Wen Hsiao
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yu-Hsuan Cheng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yi Huang
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yu-Chieh Chiu
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yu-Ju Lin
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Yuichi Mine
- Department of Medical Systems Engineering, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
- Project Research Center for Integrating Digital Dentistry, Hiroshima University, Hiroshima 734-8553, Japan
| | - Sheng-Wei Feng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - I-Ta Lee
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
| | - Tzu-Yu Peng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (Y.-S.F.-C.); (S.-W.F.)
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Zhao Y, Xu X, Li L, Zheng K, Wang X, Zhang M, Xu Y. Effect of etchant containing an Urushiol monomer from lacquer sap on dentin biostability and bonding performance. Front Bioeng Biotechnol 2023; 11:1251655. [PMID: 37901840 PMCID: PMC10613032 DOI: 10.3389/fbioe.2023.1251655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 08/10/2023] [Indexed: 10/31/2023] Open
Abstract
Objectives: This study aimed to evaluate the effectiveness of urushiol as an additive to surface acid etchant on dentin structure, by assessing the biostability of dentin, and determine the bonding strengths of dentin and enamel to the composite in the complicated oral microecology. Methods: Etchants with different concentrations of urushiol (0.5, 1, or 3 wt%) were formulated and tested for their bonding performance. Demineralized dentin beams that were etched with experimental etchants were incubated in simulated body fluid solutions by evaluating the weight decrement after 1 month. The effects of urushiol on dentin and matrix metalloproteinases were confirmed by scanning electron microscopy (SEM). Moreover, the antibiotic actions of urushiol on the common cariogenic bacteria Streptococcus mutans, Streptococcus sanguinis, and Streptococcus gordonii as well as the biofilm were evaluated, and its effect on bacterial morphology was observed by scanning electron microscopy. Finally, enamel and dentin specimens were prepared from human molars to determine the depth of demineralization by the etchants and the relationship with the resin bond strengths to enamel and dentin (μTBS) and the morphology of the bonding interface. Results: Urushiol could interact with dentine and inhibit collagenase activity, resulting in biostable dentine. The application of the etchants containing 0.5, 1, or 3 wt% urushiol significantly improved the durability of the dentin bonding interface with its instinctive antibacterial property (p < 0.05). Conclusion: Urushiol not only improves dentin stability by interacting with collagen and inactivating MMP activity but also plays a role in the antibacterial effects in the complicated oral microecology. The effectiveness of urushiol etchant prolongs the longevity of bonded dental restorations without compromising clinical operation time.
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Affiliation(s)
- Ying Zhao
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Department of Prosthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Xuanwen Xu
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Lu Li
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Kai Zheng
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Xiaoqian Wang
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Ming Zhang
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Yan Xu
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
- Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
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Jamal H, Yaghmoor R, Abed H, Young A, Ashley P. Impact of Dentine Pretreatment with Matrix Metalloproteinase Inhibitors on Bond Strength of Coronal Composite Restorations: A Systematic Review and Meta-analysis of In Vitro Studies. Eur J Dent 2023; 17:974-999. [PMID: 36400108 PMCID: PMC10756735 DOI: 10.1055/s-0042-1757582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Matrix metalloproteinase (MMP) enzymes participate in collagen matrix degradation, including in dentine, potentially compromising bond strength. Therefore, MMP inhibitors have been hypothesized to improve restoration bond strength and stability. This systematic review aimed to evaluate the influence of different MMP inhibitors applied as dentine surface pretreatments on the immediate (24 hours) and longer term (months) bond strength of direct coronal composite restorations. This systematic literature review followed the Preferred Reporting Items for Systematic Review and Meta-analyses (PRISMA) statement. A systematic literature search of three databases (Ovid MEDLINE, Ovid Embase, and Google Scholar) was conducted independently by two reviewers from inception to April 2022. An adapted quality assessment tool was independently applied by two reviewers for risk of bias assessment. RevMan v5.4 software was used for meta-analyses. A randomeffectsmodel was used to generatemean differences with 95% confidence intervals for treatment and control comparisons. The Q-test and I2-test were used to test for heterogeneity. The proportion of total variance across studies attributable to heterogeneity rather than chance was calculated. Overall effects were tested using the Z-test, while subgroup differences were tested using Chi-squared tests. Of 934 studies, 64 studies were included in the systematic review and 42 in the meta-analysis. Thirty-one MMP inhibitors were reported, three of which were included in the meta-analysis: 2% chlorhexidine (CHX), 0.3M carbodiimide (EDC), and 0.1% riboflavin (RIBO). Pretreatment with 2% CHX for 30 and 60 seconds did not significantly improve bond strength compared with controls either immediately or after long-termageing. However, pretreatment with 0.3MEDC and 0.1% RIBO (but not CHX) significantly improved bond strength compared with control groups both immediately and over time. Most studies showed a medium risk of bias. These in vitro findings pave the way for rationale clinical trialing of dentine surface pretreatment with MMP inhibitors to improve clinical outcomes.
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Affiliation(s)
- Hasan Jamal
- Paediatric Dentistry Department, Eastman Dental Institute, University College London, London, United Kingdom
- Department of Biomaterials and Tissue Engineering, Royal Free Hospital, UCL Eastman Dental Institute, London, United Kingdom
| | - Rayan Yaghmoor
- Department of Biomaterials and Tissue Engineering, Royal Free Hospital, UCL Eastman Dental Institute, London, United Kingdom
- Department of Microbial Diseases, UCL Eastman Dental Institute, Royal Free Hospital, London, United Kingdom
- Department of Restorative Dentistry, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Hassan Abed
- Department of Basic and Clinical Oral Sciences, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Anne Young
- Department of Biomaterials and Tissue Engineering, Royal Free Hospital, UCL Eastman Dental Institute, London, United Kingdom
| | - Paul Ashley
- Paediatric Dentistry Department, Eastman Dental Institute, University College London, London, United Kingdom
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Porto ICCDM, Lôbo TDLGF, Rodrigues RF, Lins RBE, da Silva MAB. Insight into the development of versatile dentin bonding agents to increase the durability of the bonding interface. FRONTIERS IN DENTAL MEDICINE 2023. [DOI: 10.3389/fdmed.2023.1127368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Despite the huge improvements made in adhesive technology over the past 50 years, there are still some unresolved issues regarding the durability of the adhesive interface. A complete sealing of the interface between the resin and the dentin substrate remains difficult to achieve, and it is doubtful whether an optimal interdiffusion of the adhesive system within the demineralized collagen framework can be produced in a complete and homogeneous way. In fact, it is suggested that hydrolytic degradation, combined with the action of dentin matrix enzymes, destabilizes the tooth-adhesive bond and disrupts the unprotected collagen fibrils. While a sufficient resin–dentin adhesion is usually achieved immediately, bonding efficiency declines over time. Thus, here, a review will be carried out through a bibliographic survey of scientific articles published in the last few years to present strategies that have been proposed to improve and/or develop new adhesive systems that can help prevent degradation at the adhesive interface. It will specially focus on new clinical techniques or new materials with characteristics that contribute to increasing the durability of adhesive restorations and avoiding the recurrent replacement restorative cycle and the consequent increase in damage to the tooth.
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Al-Haj Husain N, Al-Haj Husain A, Grgic I, Kipar A, Molinero-Mourelle P, Stadlinger B, Özcan M. Effect of Cumulative Ionizing Radiation on Flexural Strength, Flexural Modulus, and Elasticity Modulus of Dentin in Unerupted Human Third Molars. Adv Radiat Oncol 2022; 8:101127. [PMID: 36845612 PMCID: PMC9943779 DOI: 10.1016/j.adro.2022.101127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 11/09/2022] [Indexed: 11/27/2022] Open
Abstract
Purpose This in vitro study aimed to investigate the changes in mechanical properties in dentin of third molars after radiation therapy using variable doses and frequencies. Methods and Materials Rectangular cross sectioned dentin hemisections (N = 60, n = 15 per group; >7 × 4 × 1.2 mm) were prepared using extracted third molars. After cleansing and storage in artificial saliva, random distribution was performed to 2 irradiation settings, namely AB or CD (A, 30 single doses of irradiation [2 Gy each] for 6 weeks; B, control group of A; C, 3 single doses of irradiation [9 Gy each]; and D, control group of C). Various parameters (fracture strength/maximal force, flexural strength, and elasticity modulus) were assessed using a universal Testing Machine (ZwickRoell). The effect of irradiation on dentin morphology was evaluated by histology, scanning electron microscopy, and immunohistochemistry. Statistical analysis was performed using 2-way analysis of variance and paired and unpaired t tests at a significance level of 5%. Results Significance could be found considering the maximal force applied to failure when the irradiated groups were compared with their control groups (A/B, P < .0001; C/D, P = .008). Flexural strength was significantly higher in the irradiated group A compared with control group B (P < .001) and for the irradiated groups A and C (P = .022) compared with each other. Cumulative radiation with low irradiation doses (30 single doses; 2 Gy) and single irradiation with high doses (3 single doses; 9 Gy) make the tooth substance more prone to fracture, lowering the maximal force. The flexural strength decreases when cumulative irradiation is applied, but not after single irradiation. The elasticity modulus showed no alteration after irradiation treatment. Conclusions Irradiation therapy affects the prospective adhesion of dentin and the bond strength of future restorations, potentially leading to an increased risk of tooth fracture and retention loss in dental reconstructions.
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Affiliation(s)
- Nadin Al-Haj Husain
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland,Division of Dental Biomaterials, Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland,Corresponding author: Nadin Al-Haj Husain, DMD
| | - Adib Al-Haj Husain
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Ivo Grgic
- Clinic of Radiation Oncology, Laboratory for Molecular Radiobiology, University Hospital Zurich, Zurich, Switzerland
| | - Anja Kipar
- Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Pedro Molinero-Mourelle
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Bernd Stadlinger
- Clinic of Cranio-Maxillofacial and Oral Surgery, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Mutlu Özcan
- Division of Dental Biomaterials, Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
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11
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Fronza BM, Braga RR, Cadenaro M. Dental Adhesives-Surface Modifications of Dentin Structure for Stable Bonding. Dent Clin North Am 2022; 66:503-515. [PMID: 36216443 DOI: 10.1016/j.cden.2022.05.002] [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] [Indexed: 06/16/2023]
Abstract
The latest advancements in dentin bonding have focused on strategies to impair degradation mechanisms in order to extend the longevity of bonded interfaces. Protease inhibitors can reduce collagen degradation within the hybrid layer (HL). Collagen cross-linkers allow better adhesive infiltration and also inhibit proteases activity. Particles added to adhesive can promote mineral precipitation within the HL, reducing nanoleakage and micropermeability, besides possible antimicrobial and enzymatic inhibition effects. Most of these approaches are still experimental, and aspects of the adhesive under the clinician's control are still determinant for the long-term stability of adhesive restorations.
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Affiliation(s)
- Bruna Marin Fronza
- Department of Biomaterials and Oral Biology, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, São Paulo 05508-000, Brazil
| | - Roberto Ruggiero Braga
- Department of Biomaterials and Oral Biology, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, São Paulo 05508-000, Brazil.
| | - Milena Cadenaro
- Department of Medical Sciences, University of Trieste, Strada di Fiume 447, Trieste 34149, Italy; Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Via dell'Istria 65/1, Trieste 34137, Italy
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12
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Biodegradation of Dental Resin-Based Composite—A Potential Factor Affecting the Bonding Effect: A Narrative Review. Biomedicines 2022; 10:biomedicines10092313. [PMID: 36140414 PMCID: PMC9496159 DOI: 10.3390/biomedicines10092313] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/04/2022] [Accepted: 09/15/2022] [Indexed: 12/02/2022] Open
Abstract
In recent years, although resin composite has played an important role in the restoration of tooth defects, it still has several disadvantages, including being biodegraded by saliva, bacteria and other enzymes in the oral cavity, which may result in repair failure. This factor is not conducive to the long-term survival of the prosthesis in the mouth. In this article, we review the causes, influencing factors and prevention methods of resin biodegradation. Biodegradation is mainly caused by esterase in saliva and bacteria, which breaks the ester bond in resin and causes the release of monomers. The mechanical properties of the prosthesis can then be affected. Meanwhile, cathepsin and MMPs are activated on the bonding surface, which may decompose the dentin collagen. In addition, neutrophils and residual water on the bonding surface can also aggravate biodegradation. Currently, the primary methods to prevent biodegradation involve adding antibacterial agents to resin, inhibiting the activity of MMPs and enhancing the crosslinking of collagen fibers. All of the above indicates that in the preparation and adhesion of resin materials, attention should be paid to the influence of biodegradation to improve the prosthesis’s service life in the complex environment of the oral cavity.
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13
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Baidya SK, Banerjee S, Adhikari N, Jha T. Selective Inhibitors of Medium-Size S1' Pocket Matrix Metalloproteinases: A Stepping Stone of Future Drug Discovery. J Med Chem 2022; 65:10709-10754. [PMID: 35969157 DOI: 10.1021/acs.jmedchem.1c01855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Among various matrix metalloproteinases (MMPs), MMPs having medium-size S1' pockets are established as promising biomolecular targets for executing crucial roles in cancer, cardiovascular diseases, and neurodegenerative diseases. However, no such MMP inhibitors (MMPIs) are available to date as drug candidates despite a lot of continuous research work for more than three decades. Due to a high degree of structural resemblance among these MMPs, designing selective MMPIs is quite challenging. However, the variability and uniqueness of the S1' pockets of these MMPs make them promising targets for designing selective MMPIs. In this perspective, the overall structural aspects of medium-size S1' pocket MMPs including the unique binding patterns of enzyme-inhibitor interactions have been discussed in detail to acquire knowledge regarding selective inhibitor designing. This overall knowledge will surely be a curtain raiser for the designing of selective MMPIs as drug candidates in the future.
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Affiliation(s)
- Sandip Kumar Baidya
- Natural Science Laboratory, Division of Medicinal and Pharmaceutical Chemistry, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
| | - Suvankar Banerjee
- Natural Science Laboratory, Division of Medicinal and Pharmaceutical Chemistry, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
| | - Nilanjan Adhikari
- Natural Science Laboratory, Division of Medicinal and Pharmaceutical Chemistry, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
| | - Tarun Jha
- Natural Science Laboratory, Division of Medicinal and Pharmaceutical Chemistry, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
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14
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Matrix Metalloproteinases in Dental and Periodontal Tissues and Their Current Inhibitors: Developmental, Degradational and Pathological Aspects. Int J Mol Sci 2022; 23:ijms23168929. [PMID: 36012195 PMCID: PMC9409155 DOI: 10.3390/ijms23168929] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/02/2022] [Accepted: 08/09/2022] [Indexed: 12/14/2022] Open
Abstract
Objectives: This review article aims to describe some of the roles of Matrix metalloproteinases (MMPs) in enamel, dentine, dental caries, hybrid layer degradation, pulp and periodontal tissues, throwing light on their current inhibitors. The article addresses the potential of MMPs to serve as biomarkers with diagnostic and therapeutic value. Design: The sections of this review discuss MMPs’ involvement in developmental, remodeling, degradational and turnover aspects of dental and periodontal tissues as well as their signals in the pathogenesis, progress of different lesions and wound healing of these tissues. The literature was searched for original research articles, review articles and theses. The literature search was conducted in PubMed and MEDLINE for articles published in the last 20 years. Results: 119 published papers, two textbooks and two doctoral theses were selected for preparing the current review. Conclusions: MMPs are significant proteases, of evident contribution in dental and periapical tissue development, health and disease processes, with promising potential for use as diagnostic and prognostic disease biomarkers. Continuing understanding of their role in pathogenesis and progress of different dental, periapical and periodontal lesions, as well as in dentine-pulp wound healing could be a keystone to future diagnostic and therapeutic regimens.
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15
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Degradation and Stabilization of Resin-Dentine Interfaces in Polymeric Dental Adhesives: An Updated Review. COATINGS 2022. [DOI: 10.3390/coatings12081094] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Instability of the dentine-resin interface is owed to the partial/incomplete penetration of the resin adhesives in the collagen fibrils. However, interfacial hydrolysis of the resin-matrix hybrid layer complex activates the collagenolytic and esterase enzymes that cause the degradation of the hybrid layer. Adequate hybridization is often prevented due to the water trapped between the interfibrillar spaces of the collagen network. Cyclic fatigue rupture and denaturation of the exposed collagen fibrils have been observed on repeated application of masticatory forces. To prevent interfacial microstructure, various approaches have been explored. Techniques that stabilize the resin–dentine bond have utilized endogenous proteases inhibitors, cross linking agents’ incorporation in the exposed collagen fibrils, an adhesive system free of water, and methods to increase the monomer penetration into the adhesives interface. Therefore, it is important to discover and analyze the causes of interfacial degradation and discover methods to stabilize the hybrid layer to execute new technique and materials. To achieve a predictable and durable adhesive resin, restoration is a solution to the many clinical problems arising due to microleakage, loss of integrity of the restoration, secondary caries, and postoperative sensitivity. To enhance the longevity of the resin-dentine bond strength, several experimental strategies have been carried out to improve the resistance to enzymatic degradation by inhibiting intrinsic collagenolytic activity. In addition, biomimetic remineralization research has advanced considerably to contemporary approaches of both intrafibrillar and extrafibrillar remineralization of dental hard tissues. Thus, in the presence of biomimetic analog complete remineralization of collagen, fibers are identified.
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16
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Yang J, Huang J, Qin H, Long J, Lin X, Xie F. Remineralization of human dentin type I collagen fibrils induced by carboxylated polyamidoamine dendrimer/amorphous calcium phosphate nanocomposite: an in vitro study. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2022; 33:668-686. [PMID: 34809527 DOI: 10.1080/09205063.2021.2008789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Intrafibrillar mineralization of type I collagen fibrils is of great significance in dental remineralization, which is the key of caries prevention and treatment. Herein, two substances that have the remineralization ability, carboxylated polyamidoamine dendrimer (PAMAM-COOH) and nano-sized amorphous calcium phosphate (n-ACP) were combined to synthesize a novel nanomaterial, carboxylated polyamidoamine dendrimer/amorphous calcium phosphate nanocomposite (PAMAM-COOH/ACP). This article aims to evaluate the remineralization effect of PAMAM-COOH/ACP of dentin type I collagen fibrils in vitro. Fluorescence labeling technique was innovatively used to observe and evaluate the remineralization effect. PAMAM-COOH/ACP showed superior remineralization ability of human dentin type I collagen fibrils, especially the intrafibrillar remineralization. Therefore, the novel nanomaterial PAMAM-COOH/ACP is promising to prevent and treat various diseases caused by dentin demineralization and to improve various dental materials.
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Affiliation(s)
- Jing Yang
- Department of Stomatology, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, China
| | - Jingxian Huang
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, China
| | - Hejia Qin
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, China
| | - Jindong Long
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, China
| | - Xuandong Lin
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, China
| | - Fangfang Xie
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, China
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17
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Mayer-Santos E, Maravic T, Comba A, Freitas PM, Marinho GB, Mazzitelli C, Mancuso E, Scotti N, Florenzano F, Breschi L, Mazzoni A. The Influence of Different Bleaching Protocols on Dentinal Enzymatic Activity: An In Vitro Study. Molecules 2022; 27:1684. [PMID: 35268785 PMCID: PMC8911605 DOI: 10.3390/molecules27051684] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to investigate matrix metalloproteinase (MMP) activity in human dentin using in-situ and gelatin zymography, after at-home and in-office bleaching, related to their clinical exposure times. Dentin specimens (n = 5) were treated with 35% hydrogen peroxide (50 min per session/4 sessions), 10% carbamide peroxide (180 min/21 sessions), or no treatment. All were subjected to in-situ zymography. Dentin slices were, subsequently, obtained, covered with fluorescein-conjugated gelatin, and examined with confocal laser-scanning microscopy. The fluorescence intensity was quantified and statistically analyzed using one-way ANOVA and Bonferroni tests (α = 0.05). Furthermore, gelatin zymography was performed on protein extracts obtained from dentin powder (N = 8 teeth), treated with hydrogen peroxide or carbamide peroxide, with different exposure times (10/50 min for hydrogen peroxide; 252/1260 min for carbamide peroxide). The results of the in-situ zymography showed no statistical differences between the bleached specimens and the control group, with a medium level of gelatinolytic activity expressed in the dentin tubules. The results of gelatin zymography showed an increased expression of pro-MMP-9 in carbamide peroxide groups. The expression of pro-MMP-2 decreased in all the experimental groups. The bleaching treatments performed on the enamel of sound teeth do not influence dentinal enzymatic activity. However, when unprotected dentin tissue is bleached, matrix metalloproteinases are more expressed, particularly when carbamide peroxide is used, proportional to the exposure time.
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Affiliation(s)
- Eric Mayer-Santos
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo 05508-000, Brazil; (E.M.-S.); (P.M.F.); (G.B.M.)
| | - Tatjana Maravic
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40125 Bologna, Italy; (T.M.); (C.M.); (E.M.); (F.F.); (L.B.)
| | - Allegra Comba
- Department of Surgical Sciences, University of Turin, 10126 Turin, Italy; (A.C.); (N.S.)
| | - Patricia Moreira Freitas
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo 05508-000, Brazil; (E.M.-S.); (P.M.F.); (G.B.M.)
| | - Giovanna Bueno Marinho
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo 05508-000, Brazil; (E.M.-S.); (P.M.F.); (G.B.M.)
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40125 Bologna, Italy; (T.M.); (C.M.); (E.M.); (F.F.); (L.B.)
| | - Edoardo Mancuso
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40125 Bologna, Italy; (T.M.); (C.M.); (E.M.); (F.F.); (L.B.)
| | - Nicola Scotti
- Department of Surgical Sciences, University of Turin, 10126 Turin, Italy; (A.C.); (N.S.)
| | - Federica Florenzano
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40125 Bologna, Italy; (T.M.); (C.M.); (E.M.); (F.F.); (L.B.)
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40125 Bologna, Italy; (T.M.); (C.M.); (E.M.); (F.F.); (L.B.)
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40125 Bologna, Italy; (T.M.); (C.M.); (E.M.); (F.F.); (L.B.)
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18
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Dentin Biomodification with Flavonoids and Calcium Phosphate Ion Clusters to Improve Dentin Bonding Stability. MATERIALS 2022; 15:ma15041494. [PMID: 35208035 PMCID: PMC8879567 DOI: 10.3390/ma15041494] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023]
Abstract
The purpose of this study was to evaluate the effects of flavonoids and calcium phosphate ion clusters (CPIC) on dentin bonding stability. Seven experimental solutions were synthesized using icaritin (ICT), fisetin (FIS), silibinin (SIB), CPIC, and combinations of one of three flavonoids and CPIC (ICT + C, FIS + C, SIB + C). The experimental solutions were applied to demineralized dentin prior to the application of a universal adhesive. A group without any experimental solution served as a control. Dentin specimens pretreated with the experimental solutions were assayed using Fourier transform infrared (FTIR) spectroscopy. The microtensile bond strength (µTBS) and nanoleakage were evaluated at 24 h and after 10,000 thermocycles. FIS and ICT + C showed significantly higher µTBS than the control group at 24 h. CPIC, ICT + C, FIS + C, and SIB + C showed significantly higher µTBS than the control group after thermocycling. After thermocycling, silver infiltration into the hybrid layer and interfacial gaps was more noticeable in the control group than in the other groups. The FTIR spectra revealed the formation of apatitic minerals in the demineralized dentin in the flavonoid and CPIC combination groups. The pretreatment of demineralized dentin with flavonoids and CPIC improved dentin bonding stability. The flavonoid and CPIC combinations preserved dentin bond strength.
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19
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Xie F, Long J, Yang J, Qin H, Lin X, Chen W. Effect of a new modified polyamidoamine dendrimer biomimetic system on the mineralization of type I collagen fibrils: an in vitro study. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2022; 33:212-228. [PMID: 34547218 DOI: 10.1080/09205063.2021.1982642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
We evaluate the effects of the new Dentine matrix protein 1 (DMP-1) biomimetic system composed of phosphorylated polyamidoamine dendrimer (PAMAM-PO3H2) and carboxylated polyamidoamine dendrimer (PAMAM-COOH) on the mineralization of type I collagen fibrils. PAMAM-PO3H2 and PAMAM-COOH were observed to have the ability to induce internal and external mineralization of type I collagen fibrils in vitro through non-classical mineralization crystallization pathway, which has become a hopeful biomimetic system of biomimetic remineralization and demineralization of dentin type I collagen fibrils and has great potential in inducing biomimetic remineralization of demineralized dentin.
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Affiliation(s)
- Fangfang Xie
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Jindong Long
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Jing Yang
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Hejia Qin
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Xuandong Lin
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
| | - Wenxia Chen
- College & Hospital of Stomatology, Guangxi Medical University, Nanning, Guangxi, China
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20
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WANG R, STANLEY T, YAO X, LIU H, WANG Y. Collagen stabilization by natural cross-linkers: A qualitative and quantitative FTIR study on ultra-thin dentin collagen model. Dent Mater J 2022; 41:440-450. [DOI: 10.4012/dmj.2021-247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Rong WANG
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City
| | - Tyler STANLEY
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City
| | - Xiaomei YAO
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City
| | - Hang LIU
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City
| | - Yong WANG
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City
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21
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Mennito A, Schmidt M, Lane A, Kelly A, Sabatini C, Renne W, Evans Z. Assessing the antimicrobial properties of copper-iodide doped adhesives in an In vitro caries model: A pilot study. Contemp Clin Dent 2022; 13:118-124. [PMID: 35846577 PMCID: PMC9285839 DOI: 10.4103/ccd.ccd_424_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 10/10/2020] [Accepted: 10/13/2021] [Indexed: 11/16/2022] Open
Abstract
Context: Recurrent caries are the leading cause of composite resin failure. Aims: The purpose of this pilot study was to test the efficacy of a novel copper iodide (CuI) containing dental adhesive in an in vitro caries model. Subjects and Methods: Streptococcus mutans and Lactobacillus acidophilus were grown individually on the complex medium for 48 h at 37°C. The pH of the mixed medium was 7.0 initially and tested every 24 h. 40 extracted teeth were prepared with standardized cavity preparations and coated with control or experimental CuI adhesives and imaged using a micro-computed tomography (microCT). Four study groups were evaluated: (1) control (2) 0.5 μg/ml CuI (3) 1.0 μg/ml CuI, 4) 5.0 μg/ml CuI. After incubation, the teeth were re-imaged using the microCT. Utilizing AnalyzePro software the three-dimensional data sets were overlaid and demineralization was measured and statistics were run. Statistics: Stratified ANOVA models were run to determine if there were differences between the control and experimental adhesive groups. Similarly, pH and bacterial concentrations were evaluated to ensure the viability of polymicrobial specimen. Results and Conclusions: Significant differences were found between the control group and the 1.0 and 5.0 CuI adhesive groups. No differences in pH were noted between the groups. Overlaid changes in demineralization were recorded as volume loss. CuI adhesives with 5 mg/ml or higher have the potential to limit tooth demineralization after bacterial penetration of a dental restoration in an in vitro caries model. Further testing is needed.
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22
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Rajkumar DS, Mariswamy AB. Comparative evaluation of Emblica officinalis as an etchant and an MMP inhibitor with orthophosphoric acid and chlorhexidine on the microshear bond strength of composite resin: an ex vivo study. Restor Dent Endod 2021; 46:e36. [PMID: 34513642 PMCID: PMC8411005 DOI: 10.5395/rde.2021.46.e36] [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: 07/16/2019] [Revised: 09/02/2020] [Accepted: 09/14/2020] [Indexed: 11/28/2022] Open
Abstract
Objectives This study aimed to evaluate Emblica officinalis (Indian gooseberry or amla) as an acid etchant and matrix metalloproteinase (MMP) inhibitor, and to compare its effect on the microshear bond strength of composite resin with orthophosphoric acid (OPA) and 2% chlorhexidine (CHX) as an acid etchant and MMP inhibitor, respectively. Materials and Methods The etching effect and MMP-inhibiting action of amla on dentin samples were confirmed by scanning electron microscopy (SEM) and gelatin zymography, respectively. Dentinal slabs (3 mm thick) from 80 extracted human molars were divided into 10 and 20 samples to form 2 control groups and 3 experimental groups. Groups 1, 2, and 4 were etched with OPA and groups 3 and 5 with amla juice. An MMP inhibitor was then applied: CHX for group 2 and amla extract for groups 4 and 5. Groups 1 and 3 received no MMP inhibitor. All specimens received a standardized bonding protocol and composite resin build-up, and were subjected to microshear bond strength testing. The force at which the fracture occurred was recorded and statistically analyzed. Results Amla juice had a similar etching effect as a self-etch adhesive in SEM and 100% amla extract was found to inhibit MMP-9 by gelatin zymography. The microshear bond strength values of amla were lower than those obtained for OPA and CHX, but the difference was not statistically significant. Conclusions Amla has a promising role as an acid etchant and MMP inhibitor, but further studies are necessary to substantiate its efficacy.
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Affiliation(s)
- Divya Sangeetha Rajkumar
- Department of Conservative Dentistry and Endodontics, JSS Dental College and Hospital, JSS Academy of Higher Education & Research, Mysuru, India
| | - Annapoorna Ballagere Mariswamy
- Department of Conservative Dentistry and Endodontics, JSS Dental College and Hospital, JSS Academy of Higher Education & Research, Mysuru, India
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23
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Chen W, Jin H, Zhang H, Wu L, Chen G, Shao H, Wang S, He X, Zheng S, Cao CY, Li QL. Synergistic effects of graphene quantum dots and carbodiimide in promoting resin-dentin bond durability. Dent Mater 2021; 37:1498-1510. [PMID: 34465445 DOI: 10.1016/j.dental.2021.07.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 05/09/2021] [Accepted: 07/22/2021] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Resin-based dental adhesion is mostly utilized in minimally invasive operative dentistry. However, improving the durability and stability of resin-dentin bond interfaces remain a challenge. Graphene quantum dots (GQDs) reinforced by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) were introduced to modify the resin-dentin bond interfaces, thereby promoting their durability and stability. METHODS GQDs, EDC, and EDC+GQDs groups were designed to evaluate the effects of GQDs and EDC on collagenase activity, the interaction of GQDs with collagen, and the resin-dentin interface. First, the effects of GQDs and EDC on collagenase activity was evaluated by Collagenase (EC 3.4.24.3) reacting with its substrate. The interaction of GQDs and EDC with collagen were evaluated by cross-linking degree analysis, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, attenuated total reflection Fourier transform infrared spectroscopy and enzymatic hydrolysis. Second, the acid-etched and rinse adhesive system was used to evaluate the resin-dentin bond on the basis of microtensile bond strength, in situ zymography and fluorescence confocal laser scanning microscopy. RESULTS GQDs could inhibit collagenase activity. GQDs with the aid of EDC could cross-link collagen via covalent bonds and improve the anti-enzymatic hydrolysis of collagen. In the resin-dentin adhesion model, the μTBS of the EDC+GQDs group was significantly higher than the other control groups after thermocycling. The addition of EDC to GQDs could inhibit matrix metalloproteinase activity and promote the integrity of the bonding interfaces after thermocycling. SIGNIFICANCE This study presents a novel strategy to modify the resin-dentin interface and provides a new application for GQDs. This strategy has the potential to improve the durability of resin-based restoration in dentistry.
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Affiliation(s)
- Wendy Chen
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Huimin Jin
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Heng Zhang
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Leping Wu
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Guoqing Chen
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Hui Shao
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Shengrui Wang
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Xiaoxue He
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Shunli Zheng
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Chris Ying Cao
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
| | - Quan-Li Li
- Key Lab. of Oral Diseases Research of Anhui Province, College & Hospital of Stomatology, Anhui Medical University, Hefei 230032, China.
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Maravić T, Baena E, Mazzitelli C, Josić U, Mancuso E, Checchi V, Generali L, Ceballos L, Breschi L, Mazzoni A. Endogenous Enzymatic Activity in Dentin Treated with a Chitosan Primer. Int J Mol Sci 2021; 22:ijms22168852. [PMID: 34445554 PMCID: PMC8396363 DOI: 10.3390/ijms22168852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/11/2021] [Accepted: 08/11/2021] [Indexed: 11/24/2022] Open
Abstract
The aim of this study was to evaluate the effect of different concentrations of chitosan polymer on dentinal enzymatic activity by means of gelatin and in situ zymography. Human dentin was frozen and ground in a miller. Dentin powder aliquots were demineralized with phosphoric acid and treated with three different concentrations of lyophilized chitosan polymer (1, 0.5 and 0.1 wt%) dissolved in distilled water. Dentin proteins were extracted from each experimental group and electrophoresed under non-reducing conditions in 10% SDS-PAGE containing fluorescein-labeled gelatin. After 48 h in the incubation buffer at 37 °C, proteolytic activity was registered under long-wave UV light scanner and quantified by using Image J software. Furthermore, additional teeth (n = 4) were prepared for the in situ zymographic analysis in unrestored as well as restored dentin pretreated with the same chitosan primers. The registered enzymatic activity was directly proportional to the chitosan concentration and higher in the restored dentin groups (p < 0.05), except for the 0.1% chitosan primer. Chitosan 0.1% only showed faint expression of enzymatic activity compared to 1% and 0.5% concentrations. Chitosan 0.1% dissolved in water can produce significant reduction in MMPs activity and could possibly contribute to bond strength preservation over time.
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Affiliation(s)
- Tatjana Maravić
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Eugenia Baena
- Area of Stomatology, Health Sciences Faculty, King Juan Carlos University, Avda. de Atenas, 28922 Alcorcón, Spain; (E.B.); (L.C.)
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Uroš Josić
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Edoardo Mancuso
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Vittorio Checchi
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena & Reggio Emilia, 41124 Modena, Italy; (V.C.); (L.G.)
| | - Luigi Generali
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena & Reggio Emilia, 41124 Modena, Italy; (V.C.); (L.G.)
| | - Laura Ceballos
- Area of Stomatology, Health Sciences Faculty, King Juan Carlos University, Avda. de Atenas, 28922 Alcorcón, Spain; (E.B.); (L.C.)
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
- Correspondence: ; Tel.: +39-051-208-8139; Fax: +39-051-22-5208
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MMP Inhibitors and Dentin Bonding: Systematic Review and Meta-Analysis. Int J Dent 2021; 2021:9949699. [PMID: 34135969 PMCID: PMC8179777 DOI: 10.1155/2021/9949699] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 05/19/2021] [Indexed: 12/12/2022] Open
Abstract
Objectives Resin-dentin bond strength decreases over time. This reduction is related to the loss of hybrid layer integrity. Collagenolytic enzymes, especially matrix metalloproteinases (MMPs), are responsible for the degradation of the collagen matrix of the hybrid layer. Various MMP inhibitors with the ability to prevent enzymatic degradation have been identified. This study aimed to systematically review the literature for studies which evaluated the effect of MMP inhibitors on the immediate and aged dentin bond strengths. Study SelectionScreening and analysis were carried out by two reviewers. Two databases were searched, and from a total of 740 articles, 43 were accepted for full review. 21 articles with 0.2%–2% chlorhexidine (CHX) treatments were included for meta-analysis. A risk of bias assessment was performed on all studies chosen for meta-analysis. A variety of MMP inhibitors have been studied, CHX being the most widely used. Conclusions A clear trend for a lower loss of dentin bond strength was observed with different MMP inhibitors. In meta-analysis, no significant difference was seen between the CHX and control in the immediate bond strengths. Bond strengths in the CHX group were significantly higher than the control group after aging (P < 0.001). The percentage of fractures occurring at the adhesive interface increased after aging. Five out of 21 studies included in the meta-analysis had high and the rest medium risk of bias. More long-term studies with lower risks of bias should be carried out to increase the reliability of results. Clinical RelevanceThe use of MMP inhibition with chlorhexidine can be recommended to increase the longevity of resin-dentin bond strength.
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Wang R, Li Y, Hass V, Peng Z, Wang Y. Methacrylate-functionalized proanthocyanidins as novel polymerizable collagen cross-linkers - Part 2: Effects on polymerization, microhardness and leaching of adhesives. Dent Mater 2021; 37:1193-1201. [PMID: 33965250 DOI: 10.1016/j.dental.2021.04.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 04/05/2021] [Accepted: 04/24/2021] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The aim of the study was to investigate the effects of a novel polymerizable collagen cross-linker methacrylate-functionalized proanthocyanidins (MAPA) on the polymerization, microhardness and leaching of a HEMA-based experimental dental adhesive system. METHODS Three MAPAs were synthesized using different methacrylate (MA) to proanthocyanidins (PA) feeding ratios of 1:2, 1:1, and 2:1 to obtain MAPA-1, MAPA-2, and MAPA-3, respectively. The resulting three MAPAs and PA were added to an experimental adhesive formulated with HEMA and a tri-component photoinitiator system (0.5 wt% CQ/EDMAB/DPIHP) at 1%, 5% and 10% MAPA or PA concentrations (wt%). The adhesive polymerization kinetics was measured continuously in real-time for 10 min using a Fourier-transform infrared spectroscopy (FTIR) with an attenuated total reflectance (ATR) accessory. Degree of conversion (DC) and Vickers microhardness (MH) of cured adhesives were measured at 72 h post-cure. The leaching of cured adhesives in DI water was monitored using UV-vis spectrophotometer. Statistical analysis was performed using one-way and two-way ANOVA, Tukey's (p < 0.05). RESULTS The adhesive formulations with 1%, 5% and 10% MAPAs-1, -2, -3 all generated higher rate of polymerization and 10-min DC than the formulations with PA at the same concentrations. At 72 h post-cure, the adhesive formulation with 5% MAPA-2 exhibited significantly higher DC (99.40%) and more than doubled MH (18.93) values than the formulation with 5% PA (DC = 89.47%, MH = 8.41) and the control (DC = 95.46%, MH = 9.33). Moreover, the cured adhesive with 5% MAPA-2 demonstrated significantly reduced PA leaching in comparison with cured adhesive with 5% PA. SIGNIFICANCE Synthesized MAPA is a novel class of polymerizable collagen cross-linker that not only stabilizes dentin collagen via its PA component, but also improves polymerization, mechanical properties and stability of HEMA-based adhesives via its MA component. By inheriting the benefit while overcoming the drawback of PA, MAPA offers a revolutionary solution for improved bond-strength and longevity of dental restorations.
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Affiliation(s)
- Rong Wang
- School of Dentistry, University of Missouri - Kansas City, Kansas City, MO, 64108, USA
| | - Yong Li
- Department of Chemistry, University of Missouri - Kansas City, MO, 64110, USA
| | - Viviane Hass
- School of Dentistry, University of Missouri - Kansas City, Kansas City, MO, 64108, USA
| | - Zhonghua Peng
- Department of Chemistry, University of Missouri - Kansas City, MO, 64110, USA.
| | - Yong Wang
- School of Dentistry, University of Missouri - Kansas City, Kansas City, MO, 64108, USA.
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Effect of a Copaiba Oil-Based Dental Biomodifier on the Inhibition of Metalloproteinase in Adhesive Restoration. Adv Pharmacol Pharm Sci 2021; 2021:8840570. [PMID: 33681808 PMCID: PMC7904348 DOI: 10.1155/2021/8840570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 12/21/2020] [Accepted: 02/07/2021] [Indexed: 11/29/2022] Open
Abstract
Aim This study sets out to evaluate the antiproteolytic activity of copaiba oil-based emulsion at the resin/dentin adhesive interface union formed with conventional and self-etching adhesives systems. Methods At in situ zymography, 30 teeth were sectioned 2 mm below the enamel-dentin junction; a smear layer was standardized and subdivided into four groups. Gelatin conjugated with fluorescein was used and taken to the fluorescence microscope for evaluation. In cytotoxicity, the Trypan Blue method was used at four different time points. The tested groups were (G1) control with distilled water; (G2) 2% chlorhexidine (CLX); (G3) emulsion based on copaiba oil (EC) 10% + X; (G4) 10% EC + Y; and (G5) EC 10% alkaline. The zymographic assay used the same groups described, but in 30 seconds and 10 and 20 minutes. HT1080 cells were incubated and submitted to electrophoresis. The gel was analyzed using ImageJ software. Mann–Whitney and Kruskal–Wallis tests were used in the statistical analysis (p < 0.05). Results ECs showed higher cell viability in the cytotoxicity test and showed a significant difference in 10 and 20 minutes. In the zymographic assay, alkaline EC reduced 67% of MMP-2 activity and 44% of MMP-9 compared to 2% chlorhexidine. At in situ zymography in qualitative evaluation, all groups tested showed inhibition of activity in metalloproteinases. Conclusion EC showed activity in the inhibition of metalloproteinases in vitro and in situ, especially the alkaline one. The survey shows the possibility of using ECs, a product from Amazonian biodiversity, as a biomodifier in dentistry.
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Gobbi P, Maravic T, Comba A, Mazzitelli C, Mancuso E, Falconi M, Breschi L, Mazzoni A. Biochemical and immunohistochemical analysis of tissue inhibitor of metalloproteinases-1 in human sound dentin. Clin Oral Investig 2021; 25:5067-5075. [PMID: 33569677 PMCID: PMC8342377 DOI: 10.1007/s00784-021-03819-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 01/29/2021] [Indexed: 11/29/2022]
Abstract
Objectives Matrix metalloproteases (MMPs) are a family of enzymes that operate a proteolytic activity at the level of the extracellular matrix. MMPs are regulated by tissue inhibitors of metalloproteinases (TIMPs) that can ubiquitously bind different enzyme forms. The study aims to identify a morfo-functional association between TIMP-1 and MMP-2 and -9 in human dentin. Materials and methods Proteins were extracted from demineralized human sound dentin powder and centrifuged to separate two aliquots with different molecular weights of proteins, higher and lower than 30 kDa. In each aliquot, the evaluation of the presence of TIMP-1/MMP-2 and TIMP-1/MMP-9 was performed using co-immunoprecipitation/immunoblotting analysis. The distribution of TIMP-1, in association with MMP-2 and -9, was investigated using a double immunohistochemical technique. Furthermore, the activity of TIMP-1 was measured by reverse zymography, where acrylamide gel was copolymerized with gelatin and recombinant MMP-2. Results Co-immunoprecipitation/immunoblotting analysis showed the association TIMP-1/MMP-2 and TIMP-1/MMP-9 in human sound dentin. Electron microscopy evaluation revealed a diffuse presence of TIMP-1 tightly associated with MMP-2 and -9. Reverse zymography analysis confirmed that TIMP-1 present in human dentin is active and can bind different MMPs isoforms. Conclusions The strict association of TIMP-1 with MMP-2 and -9 in situ appeared a constant finding in the human sound dentin. Clinical relevance Considering the role of TIMP-1, MMP-2, and MMP-9 within the connective tissues, clinically applicable protocols could be developed in the future to increase or decrease the level of TIMPs in human dentin to regulate the activity of MMPs, contributing to reduce caries progression and collagen degradation.
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Affiliation(s)
- Pietro Gobbi
- Department of Biomolecular Sciences, Carlo Bo Urbino University, Via Aurelio Saffi 2, 61029, Urbino, Italy
| | - Tatjana Maravic
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Allegra Comba
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Edoardo Mancuso
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Mirella Falconi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy.
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy
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Anshida VP, Kumari RA, Murthy CS, Samuel A. Extracellular matrix degradation by host matrix metalloproteinases in restorative dentistry and endodontics: An overview. J Oral Maxillofac Pathol 2021; 24:352-360. [PMID: 33456247 PMCID: PMC7802866 DOI: 10.4103/jomfp.jomfp_34_20] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/29/2020] [Accepted: 05/23/2020] [Indexed: 11/04/2022] Open
Abstract
Matrix metalloproteinases (MMPs) are a group of over 25 secreted and membrane-bound enzymes responsible for pericellular substrate degeneration. In response to injury, they play key roles in morphogenesis, wound healing, tissue repair and remodeling. They have been isolated from dentin, odontoblasts, pulp and periapical tissue. They play a major role in the formation of dentin matrix and secondary and tertiary dentin. These are also responsible for releasing dentinal growth factors. MMP family proteins elicit a dual role in the pathogenesis of inflammation, stimulating protective innate and/or adaptive immune functions, as well as tissue destruction. The main organic component of tooth structure is collagen, and MMPs that degrade collagen and the extracellular matrix have been implicated in the progression of dental caries, dental erosion as well as degradation of the hybrid layer. MMPs have also been shown to be active in pulpitis, and studies have shown that they can be used as diagnostic markers of pulpal and periapical inflammation. This review describes the role of MMPs in dental caries, dental erosion, bond stability as well as in pulpal and periapical inflammation.
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Affiliation(s)
- V P Anshida
- Department of Conservative Dentistry and Endodontics, Vokkaligara Sangha Dental College and Hospital, Bengaluru, Karnataka, India
| | - R Anitha Kumari
- Department of Conservative Dentistry and Endodontics, Vokkaligara Sangha Dental College and Hospital, Bengaluru, Karnataka, India
| | - Chethana S Murthy
- Department of Conservative Dentistry and Endodontics, Vokkaligara Sangha Dental College and Hospital, Bengaluru, Karnataka, India
| | - Anoop Samuel
- Department of Conservative Dentistry and Endodontics, Noorul Islam College of Dental Sciences, Thiruvananthapuram, Kerala, India
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Zhou Y, Matin K, Shimada Y, Wang G, Sadr A, Tagami J. Detection and analysis of early degradation at resin-dentin interface by optical coherence tomography (OCT) and confocal laser scanning microscope (CLSM). J Dent 2021; 106:103583. [PMID: 33450311 DOI: 10.1016/j.jdent.2021.103583] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 01/06/2021] [Accepted: 01/07/2021] [Indexed: 01/21/2023] Open
Abstract
OBJECTIVE To evaluate early degradation at resin-dentin interface using non-invasive swept-source optical coherence tomography (SS-OCT) and confocal laser scanning microscope (CLSM). METHODS Self-etch adhesives and resin-composites containing bisphenol-glycidyl-dimethacrylate (Bis-GMA), which is one of the most widely used monomers in restorative materials, were investigated in this study. Forty cervical cavities were prepared in bovine incisors and applied by the adhesive with/without Bis-GMA (AdhesiveBG/Adhesive), filled by the resin with/without Bis-GMA (ResinBG/Resin) and then challenged by cariogenic biofilm (37 °C, 24 h). Gap Formation and dentin demineralization around resin-composites were observed by SS-OCT and CLSM. RESULTS Three types of resin-dentin interfacial degradation could be detected from SS-OCT. Type I-dentin demineralization around resin without gap, showing feather-shaped dark zones without bright scattered lines at resin-dentin interfaces. Type II-dentin demineralization around resin with adhesive-dentin bonded gaps, showing feather-shaped dark zones with bright scattered lines at resin-dentin interfaces. Type III-dentin demineralization around resin with adhesive-dentin debonded gaps, showing edge-shaped dark zones with bright scattered lines at resin-dentin interface. From CLSM, the groups were compared in gap scale (GS), gap depth (GD), gap width (GW) and dentin wall lesion depth (WLD). Bis-GMA-containing adhesive groups showed significantly lower GS than Bis-GMA-free adhesive groups. Bis-GMA-containing resin groups showed significantly lower WLD than Bis-GMA-free resin groups. However, they did not show significant differences in GD and GW. CONCLUSION Three types of early degradation at resin-dentin interface can be noninvasively detected by SS-OCT. Bis-GMA-containing and Bis-GMA-free restorative materials show differences in gap scale and dentin wall lesion depth. CLINICAL SIGNIFICANCE SS-OCT can nondestructively detect early resin-dentin interfacial degradation. Gap scale can be used as a parameter to evaluate the risk factor of gaps.
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Affiliation(s)
- Yuan Zhou
- Laboratory of Molecular and Preventive Dentistry, Department of Preventive Dentistry, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Huangpu District, 200011, Shanghai, China.
| | - Khairul Matin
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Endowed Department of International Oral Health Science (Affiliated With Department of Translational Research), School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa, Japan
| | - Yasushi Shimada
- Department of Operative Dentistry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Guoqing Wang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Alireza Sadr
- Biomimetics Biomaterials Biophotonics & Technology Laboratory, Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle, WA, USA
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
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Nagpal M, Taneja S, Kumar M, Dudeja C. Evaluation of the effect of natural versus synthetic matrix metalloproteinase silencers in preservation of dentin collagen and long-term bond strength of total etch adhesive. J Conserv Dent 2020; 23:221-226. [PMID: 33551589 PMCID: PMC7861083 DOI: 10.4103/jcd.jcd_91_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 07/29/2020] [Accepted: 08/25/2020] [Indexed: 11/04/2022] Open
Abstract
Aim This study investigated the effect of various synthetic (galardin [Gal] and benzalkonium chloride [BAC]) and natural agents (hesperidin [HES] and epigallocatechin gallate) on the stability of dentin collagen matrix to resist collagenase degradation and improve long-term microtensile bond strength. Materials and Methods Ten sound-impacted third molars were collected and manual removal of pulp, periodontal ligament, cementum, and enamel was done. Remaining dentin fragments were pulverized under liquid nitrogen to obtain dentin powder. 2 mg aliquot of dentin powder was allocated to each of the test solutions and subjected to hydroxyproline assay. Another 60 sound human third molars were collected and occlusal enamel was ground flat to reach dentinoenamel junction. Class I cavities were prepared in dentin, followed by etching using 37% phosphoric acid for 15 s. Samples were then subjected to surface treatment with different agents for 60 s, followed by application of Optibond S and restoration with P 60 composite resin. Samples of all groups except control were subject to thermocycling. Samples were sectioned to 1 mm thick slabs which were subject to universal testing machine to determine ultimate tensile strength. One-way analysis of variance and Bonferroni post hoc test with a significance level of P < 0.05 were used to analyze data. Results HES resulted in maximum resistance to collagen degradation, followed by epigallocatechin gallate (EGCG), Gal, and BAC with a significant difference among the groups. Samples of Gal group showed the highest microtensile bond strength values, followed by HES, EGCG, BAC with a significant difference between the groups except HES and EGCG where the difference was nonsignificant. Conclusion The use of matrix metalloproteinase silencers could improve the mechanical properties of collagen and resist enzymatic degradation, leading to an improved long-term intimate restoration.
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Affiliation(s)
| | - Sonali Taneja
- Department of Conservative Dentistry & Endodontics, ITS Dental College and Hospital, Ghaziabad, Uttar Pradesh, India
| | - Mohit Kumar
- Department of Conservative Dentistry & Endodontics, ITS Dental College and Hospital, Ghaziabad, Uttar Pradesh, India
| | - Chetna Dudeja
- Department of Conservative Dentistry & Endodontics, ITS Dental College and Hospital, Ghaziabad, Uttar Pradesh, India
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Comba A, Maravić T, Villalta V, Tozzola S, Mazzitelli C, Checchi V, Mancuso E, Scotti N, Tay FR, Breschi L, Mazzoni A. Effect of an ethanol cross-linker on universal adhesive. Dent Mater 2020; 36:1645-1654. [DOI: 10.1016/j.dental.2020.10.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 10/04/2020] [Accepted: 10/06/2020] [Indexed: 02/02/2023]
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Choi Y, Sun W, Kim Y, Kim IR, Gong MK, Yoon SY, Bae MK, Park BS, Park SB, Kim YI. Effects of Zn-Doped Mesoporous Bioactive Glass Nanoparticles in Etch-and-Rinse Adhesive on the Microtensile Bond Strength. NANOMATERIALS 2020; 10:nano10101943. [PMID: 33003534 PMCID: PMC7601785 DOI: 10.3390/nano10101943] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 09/17/2020] [Accepted: 09/28/2020] [Indexed: 01/05/2023]
Abstract
The purpose of this study was to assess the effects in the dentin bond strength of dental adhesives (DAs) and biological effects using zinc (Zn)-doped mesoporous bioactive glass nanoparticles (MBN-Zn). Synthesized MBN and MBN-Zn were characterized by scanning electron microscopy (SEM), X-ray diffraction and the Brunauer, Emmett and Teller (BET) method. The matrix metalloproteinases (MMP) inhibition effects of DA-MBN and DA-MBN-Zn were analyzed. The microtensile bond strength (MTBS) test was conducted before and after thermocycling to investigate the effects of MBN and MBN-Zn on the MTBS of DAs. The biological properties of DA-MBN and DA-MBN-Zn were analyzed with human dental pulp stem cells (hDPSCs). Compared with the DA, only the DA-1.0% MBN and DA-1.0% MBN-Zn exhibited a statistically significant decrease in MMP activity. The MTBS values after thermocycling were significantly increased in DA-1.0% MBN and DA-1.0% MBN-Zn compared with the DA (p < 0.05). It was confirmed via the MTT assay that there was no cytotoxicity for hDPSCs at 50% extract. In addition, significant increases in the alkaline phosphatase activity and Alizarin Red S staining were observed only in DA-1.0%MBN-Zn. These data suggest the 1.0% MBN and 1.0% MBN-Zn enhance the remineralization capability of DAs and stabilize the long-term MTBS of DAs by inhibiting MMPs.
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Affiliation(s)
- Yeonju Choi
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea; (Y.C.); (M.-K.G.); (S.-B.P.)
| | - Woogyeong Sun
- School of Materials Science and Engineering, Pusan National University, Busan 46241, Korea; (W.S.); (S.-Y.Y.)
| | - Yeon Kim
- Department of Oral Physiology, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.K.); (M.-K.B.)
| | - In-Ryoung Kim
- Department of Oral Anatomy, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (I.-R.K.); (B.-S.P.)
| | - Mi-Kyung Gong
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea; (Y.C.); (M.-K.G.); (S.-B.P.)
| | - Seog-Young Yoon
- School of Materials Science and Engineering, Pusan National University, Busan 46241, Korea; (W.S.); (S.-Y.Y.)
| | - Moon-Kyoung Bae
- Department of Oral Physiology, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.K.); (M.-K.B.)
| | - Bong-Soo Park
- Department of Oral Anatomy, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (I.-R.K.); (B.-S.P.)
| | - Soo-Byung Park
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea; (Y.C.); (M.-K.G.); (S.-B.P.)
| | - Yong-Il Kim
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea; (Y.C.); (M.-K.G.); (S.-B.P.)
- Dental and Life Science Institute, Pusan National University, Yangsan 50612, Korea
- Correspondence: ; Tel.: +82-55-360-5163
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Coelho BS, Tomazinho FSF, Leonardi DP, Scaini F, Gabardo MCL, Lara RMD, Baratto-Filho F. Effects of 1-Ethyl-3-(3-Dimethylaminopropyl) Carbodiimide on Adhesion of Posts in Teeth Obturated With Different Sealers. Braz Dent J 2020; 31:417-422. [DOI: 10.1590/0103-6440202002897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 02/10/2020] [Indexed: 11/21/2022] Open
Abstract
Abstract The aim of this study was to evaluate the effect of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) on bond strength of fiberglass posts in root canals obturated with different endodontic sealers. Seventy-eight mandibular premolars were obturated with three sealers (n=26): Endofill (END), AH Plus (AHP), and Endosequence BC Sealer (EBS). After preparation of the post space, two subgroups were formed according to the cementation of the posts (n=13): with EDC (EDC), and without EDC (control - CON). The specimens were submitted to a pull-out test, failure mode classification, and root canal surface evaluation by scanning electron microscopy after post displacement. Regarding the bond strength, a significant difference between the EDC and CON subgroups occurred only in the END (p=0.001). No difference was detected among the CON subgroups (p=0.339). However, among the EDC subgroups, AHP presented significantly higher values (END versus AHP: p=0.001; AHP versus EBS: p=0.016). Upon classification of failure modes, score 1 (≥ 50% of cement) was the most commonly observed, except for the END + EDC. Remains of endodontic sealers and resin cements were found in the cervical third, but without statistical difference (p=0.269), while in the middle third, difference occurred (p=0.004). In conclusion, EDC decreases bond strength when associated with END sealer, without changing the failure mode between the resin cement and fiberglass post. The best performance was observed when EDC was combined with AHP sealer.
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Kazemi-Yazdi H, Saeed-Nezhad M, Rezaei S. Effect of Chlorhexidine on durability of two self-etch adhesive systems. J Clin Exp Dent 2020; 12:e663-e669. [PMID: 32904985 PMCID: PMC7462379 DOI: 10.4317/jced.56873] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 04/26/2020] [Indexed: 12/04/2022] Open
Abstract
Background Despite of the rapid development in the field of dental adhesives, the issue of reduction in dentin bond durability has still not been resolved. The activity of dentinal endogenous enzymes such as MMPs is one of the most important causes of failure in resin composite restorations. The aim of this study was to investigate the influence of Chlorhexidine on micro-tensile bond strength of two types of commercially available self-etch adhesives.
Material and Methods Twenty four sound and freshly extracted molars were selected. Four standardized flat mid-coronal dentinal disks were prepared from each tooth. The specimens were randomly assigned to 6 groups (n=16). Groups A(control group) and B were treated with Clearfill SE Bond based on the manufacturer’s instructions. Groups C and D were treated with 2% Chlorhexidine 60 seconds before applying Clearfill SE Bond. Groups E and F were treated with Peak Universal Bond according to the manufacturer’s instructions. All groups were stored in distilled water in room temperature. Microtensile bond strength in groups A, C, and E were tested 24 hours after preparation, while microtensile bond strength in groups B, D, and F were tested after 3 months storage and 3000 thermal cycles(5-55 °C). Statistical analysis was performed with SPSS 20 and µTBS test results were analyzed using the Two-way ANOVA test.
Results µTBS was not significantly different between groups A, C, and E after 24 hours (P>0.5). There was no significant difference between groups B (Clearfill SE Bond + Aging) and D (Clearfill SE Bond + 2% CHX + Aging). The Peak Universal µTBS significantly decreased after the aging procedure (P<0.001).
Conclusions Based on the findings of this study, pretreatment with 2% CHX had no negative effect on the Clearfill SE Bond µTBS. However the µTBS of 0.2% CHX contained Peak Universal adhesive decreased significantly after aging. Key words:Self-etch adhesives, Micro-tensile bond strength, chlorhexidine, bond durability.
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Affiliation(s)
- Haleh Kazemi-Yazdi
- DDS, MSc, Specialist in Operative Dentistry, Associate Professor, Operative Dentistry Department, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | | | - Sadaf Rezaei
- DDS, Postgraduate Student of Operative Dentistry, Operative Dentistry Department, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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de Moraes IQS, do Nascimento TG, da Silva AT, de Lira LMSS, Parolia A, Porto ICCDM. Inhibition of matrix metalloproteinases: a troubleshooting for dentin adhesion. Restor Dent Endod 2020; 45:e31. [PMID: 32839712 PMCID: PMC7431940 DOI: 10.5395/rde.2020.45.e31] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 02/17/2020] [Accepted: 03/05/2020] [Indexed: 02/07/2023] Open
Abstract
Matrix metalloproteinases (MMPs) are enzymes that can degrade collagen in hybrid layer and reduce the longevity of adhesive restorations. As scientific understanding of the MMPs has advanced, useful strategies focusing on preventing these enzymes' actions by MMP inhibitors have quickly developed in many medical fields. However, in restorative dentistry, it is still not well established. This paper is an overview of the strategies to inhibit MMPs that can achieve a long-lasting material-tooth adhesion. Literature search was performed comprehensively using the electronic databases: PubMed, ScienceDirect and Scopus including articles from May 2007 to December 2019 and the main search terms were “matrix metalloproteinases”, “collagen”, and “dentin” and “hybrid layer”. MMPs typical structure consists of several distinct domains. MMP inhibitors can be divided into 2 main groups: synthetic (synthetic-peptides, non-peptide molecules and compounds, tetracyclines, metallic ions, and others) and natural bioactive inhibitors mainly flavonoids. Selective inhibitors of MMPs promise to be the future for specific targeting of preventing dentin proteolysis. The knowledge about MMPs functionality should be considered to synthesize drugs capable to efficiently and selectively block MMPs chemical routes targeting their inactivation in order to overcome the current limitations of the therapeutic use of MMPs inhibitors, i.e., easy clinical application and long-lasting effect.
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Affiliation(s)
- Izadora Quintela Souza de Moraes
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Ticiano Gomes do Nascimento
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Antonio Thomás da Silva
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Lilian Maria Santos Silva de Lira
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Abhishek Parolia
- Division of Clinical Dentistry, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia
| | - Isabel Cristina Celerino de Moraes Porto
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil.,Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
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Xu J, Li M, Wang W, Wu Z, Wang C, Jin X, Zhang L, Jiang W, Fu B. A novel prime-&-rinse mode using MDP and MMPs inhibitors improves the dentin bond durability of self-etch adhesive. J Mech Behav Biomed Mater 2020; 104:103698. [DOI: 10.1016/j.jmbbm.2020.103698] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 12/11/2022]
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38
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França CM, Tahayeri A, Rodrigues NS, Ferdosian S, Puppin Rontani RM, Sereda G, Ferracane JL, Bertassoni LE. The tooth on-a-chip: a microphysiologic model system mimicking the biologic interface of the tooth with biomaterials. LAB ON A CHIP 2020; 20:405-413. [PMID: 31854401 PMCID: PMC7395925 DOI: 10.1039/c9lc00915a] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The tooth has a unique configuration with respect to biomaterials that are used for its treatment. Cells inside of the dental pulp interface indirectly with biomaterials via a calcified permeable membrane, formed by the dentin matrix and several thousands of dentinal tubules (∼2 μm in diameter). Although the cytotoxic response of the dental pulp to biomaterials has been extensively studied, there is a shortage of in vitro model systems that mimic the dentin-pulp interface and enable an improved understanding of the morphologic, metabolic and functional influence of biomaterials on live dental pulp cells. To address this shortage, here we developed an organ-on-a-chip model system which integrates cells cultured directly on a dentin wall within a microfluidic device that replicates some of the architecture and dynamics of the dentin-pulp interface. The tooth-on-a-chip is made out of molded polydimethylsiloxane (PDMS) with a design consisting of two chambers separated by a dentin fragment. To characterize pulp cell responses to dental materials on-chip, stem cells from the apical papilla (SCAPs) were cultured in odontogenic medium and seeded onto the dentin surface, and observed using live-cell microscopy. Next, to evaluate the tooth-on-a-chip as a platform for materials testing, standard dental materials used clinically (2-hydroxyethylmethacrylate - HEMA, phosphoric acid - PA, and Adper-Scotchbond - SB) were tested for cytotoxicity, cell morphology, and metabolic activity on-chip, and compared against standardized off-chip controls. All dental materials had cytotoxic effects in both on-chip and off-chip systems in the following order: HEMA > SB > PA (p < 0.05), and cells presented consistently higher metabolic activity on-chip than off-chip (p < 0.05). Furthermore, the tooth-on-a-chip enabled real-time tracking of gelatinolytic activity in a model hybrid layer (HL) formed in the microdevice, which suggests that dental pulp cells may contribute to the proteolytic activity in the HL more than endogenous proteases. In conclusion, the tooth-on-a-chip is a novel platform that replicates near-physiologic conditions of the pulp-dentin interface and enables live-cell imaging to study dental pulp cell response to biomaterials.
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Affiliation(s)
- Cristiane Miranda França
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Anthony Tahayeri
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Nara Sousa Rodrigues
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Shirin Ferdosian
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | | | - Grigoriy Sereda
- Department of Chemistry, University of South Dakota, Vermillion, SD, USA
| | - Jack L Ferracane
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Luiz E Bertassoni
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA. and Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA and Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA and Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA
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Effect of 2% Chlorhexidine Following Acid Etching on Microtensile Bond Strength of Resin Restorations: A Meta-Analysis. ACTA ACUST UNITED AC 2019; 55:medicina55120769. [PMID: 31810222 PMCID: PMC6955988 DOI: 10.3390/medicina55120769] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 11/26/2019] [Accepted: 11/27/2019] [Indexed: 11/28/2022]
Abstract
Background and Objectives: The aim of this systematic review was to examine the effect of 2% chlorhexidine following acid etching on the microtensile bond strength of resin restorations for different follow-up times. Materials and Methods: A thorough search of PubMed, Scopus, and Embase databases were conducted. In vitro experimental studies or in vivo studies published up to December 2018 with an experimental group treated with a 2% chlorhexidine solution following acid etching and a control group were included, wherein the final restoration used a resin composite in both the groups. Results: Twenty-one articles were identified for qualitative analysis and 18 for meta-analysis. The difference in the means of microtensile bond strength between the two groups was calculated for the different follow-up times. The differences were significant for 6 months (4.30 MPa; 95% CI 2.72–5.89), 12 months (8.41 MPa; 95% CI 4.93–11.88), and 2–5 years including aged and thermocycling samples (9.08 MPa; 95% CI 5.36–12.81). There were no significant differences for the type of adhesive used. A meta-regression model showed a significant effect of time on the microtensile bond strength. Conclusions: The application of a 2% chlorhexidine solution after acid etching increased the microtensile bond strength significantly for follow-up times of 6 months or more. The adhesive type had no influence.
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Kang J, Izutani N, D'Angelo M, Buis W, Wang Y, Blatz M, Imazato S, Ozer F. Assaying endogenous matrix metalloproteinases (MMPs) in acid-etched dentinal cavity walls. Dent Mater J 2019; 38:934-939. [PMID: 31511475 DOI: 10.4012/dmj.2018-342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Endogenous dentinal matrix metalloproteinases (MMPs) have been implicated in the auto-degradation of collagen fibrils within resin infiltrated layers of dentinal attachment. In order to target these proteinases, we must know which MMPs are produced and activated at the resin/dentin interface. In this study, we have optimized an extraction procedure and quantitated levels of endogenous MMPs in samples of dentin removed from the cavity walls of a single, extracted tooth. In our tooth-cavity model, an occlusal cavity (2×4×2 mm) was prepared and removed from the tooth crown, leaving surrounding dentinal walls of 1-mm-thick. The samples were pulverized with an analytic mill. Using enzyme-linked immunosorbent assay (ELISA), an average of 34.7 picograms of MMP-9 was detected in less than 300 mg of dentinal powder. This is the first study of its kind to quantitate endogenous levels of MMP in dentinal protein isolated from the cavity walls of a single, extracted tooth.
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Affiliation(s)
- Justin Kang
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania
| | - Naomi Izutani
- Department of Restorative and Endodontology, Osaka University Graduate School of Dentistry
| | - Marina D'Angelo
- Department of Bio-Medical Sciences, Philadelphia College of Osteopathic Medicine
| | - William Buis
- Department of Bio-Medical Sciences, Philadelphia College of Osteopathic Medicine
| | - Yu Wang
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania
| | - Markus Blatz
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania
| | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Fusun Ozer
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania
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Bond stability of conventional adhesive system with MMP inhibitors to superficial and deep dentin. J Mech Behav Biomed Mater 2019; 100:103402. [DOI: 10.1016/j.jmbbm.2019.103402] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 08/13/2019] [Accepted: 08/19/2019] [Indexed: 11/22/2022]
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43
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Bridi EC, Leme-Kraus AA, Basting RT, Bedran-Russo AK. Long-term nanomechanical properties and gelatinolytic activity of titanium tetrafluoride-treated adhesive dentin interface. Dent Mater 2019; 35:1471-1478. [DOI: 10.1016/j.dental.2019.07.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 05/30/2019] [Accepted: 07/15/2019] [Indexed: 12/19/2022]
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44
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Borgo GO, Vieira-Junior WF, Theobaldo JD, Aguiar FHB, Lima DANL. Effect of Dentin Pretreatment with Arginine on Microshear Bond Strength of Etch-and-Rinse or Self-Etch Adhesive Systems. Eur J Dent 2019; 13:199-205. [PMID: 31476775 PMCID: PMC6777174 DOI: 10.1055/s-0039-1694307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Objective
The main purpose of this study was to evaluate the effect of dentin pretreatment with 8% arginine on the immediate and 6-month bond strength (BS) of adhesive systems and surface morphology of dentin.
Materials and Methods
Dentin bovine specimens (5 × 5 mm) were allocated into following pretreatments: without pretreatment (conventional technique, C) or exposure to arginine solution (A) for 5 minutes prior to tooth restoration. The adhesive procedure was performed using (
n
= 12): 3-step etch-and-rinse adhesive (Scotchbond Multipurpose—SBMP [C+SBMP and A+SBMP]); 2-step etch-and-rinse adhesive (Single Bond 2 - SB [C+SB and A+SB]); or 2-step self-etch adhesive (Clearfil SE Bond - CSEB [C+CSEB and A+CSEB]). After 24 hours, the composite resin restorations were evaluated immediately and after 6 months of water storage using a microshear test and fracture pattern. The dentin surface exposed to A was assessed by scanning electron microscopy (SEM). The immediate BS data were submitted to a two-way analysis of variance and Tukey's test, and the long-term BS results were analyzed using Kruskal–Wallis and Dunn tests (α = 0.05).
Results
There was a significant decrease in immediate and 6-month BS for the A+SB and A+CSEB groups, which differed statistically from the C group. The fracture pattern was predominantly adhesive for SB and CSEB adhesive for C and A. The SEM images presented a different conditioning pattern of the dentin exposed to A.
Conclusion
The dentin pretreatment with arginine interfered negatively in the immediate and long-term BS of the simplified adhesive system. However, the SBMP adhesive was not affected by arginine pretreatment presenting the most satisfactory results.
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Affiliation(s)
- Gabriela Oliveira Borgo
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Waldemir Francisco Vieira-Junior
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.,Department of Restorative Dentistry, São Leopoldo Mandic Institute and Dental Research Center, Campinas, São Paulo, Brazil.,School of Health Sciences, Centro Universitário das Faculdades Metropolitanas Unidas, São Paulo, Brazil
| | - Jéssica Dias Theobaldo
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.,School of Health Sciences, Centro Universitário das Faculdades Metropolitanas Unidas, São Paulo, Brazil
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Débora Alves Nunes Leite Lima
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
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Influence of protease inhibitors on the degradation of sound, sclerotic and caries-affected demineralized dentin. J Mech Behav Biomed Mater 2019; 97:1-6. [DOI: 10.1016/j.jmbbm.2019.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/02/2019] [Accepted: 05/03/2019] [Indexed: 01/23/2023]
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Wu J, Zhou C, Ruan J, Weir MD, Tay F, Sun J, Melo MAS, Oates TW, Chang X, Xu HH. Self-healing adhesive with antibacterial activity in water-aging for 12 months. Dent Mater 2019; 35:1104-1116. [DOI: 10.1016/j.dental.2019.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 04/23/2019] [Accepted: 05/06/2019] [Indexed: 11/27/2022]
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Dolmatov IY, Shulga AP, Ginanova TT, Eliseikina MG, Lamash NE. Metalloproteinase inhibitor GM6001 delays regeneration in holothurians. Tissue Cell 2019; 59:1-9. [PMID: 31383283 DOI: 10.1016/j.tice.2019.05.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 05/22/2019] [Accepted: 05/22/2019] [Indexed: 01/31/2023]
Abstract
The effect of the GM6001 metalloproteinase inhibitor on the regeneration of ambulacral structures in Eupentacta fraudatrix has been investigated. Inhibition of proteinase activity exerts a marked effect on regeneration, being dependent on the time when GM6001 is injected. When administration of the inhibitor begins on day 3 post-injury, regeneration is completely abolished, and the animals die. This means that early activation of proteinases is crucial for triggering the regenerative process in holothurians. When GM6001 in first injected on day 7 post-injury, the regeneration rate decreases. However, this effect has proven to be reversible: when inhibition ceases, the regeneration resumes. The effect of the inhibitor is manifested as a retarded degradation of the extracellular matrix, the lack of cell dedifferentiation, and, probably, a slower cell migration. The gelatinase activity is detected in all the regenerating organs of E. fraudatrix. In the holothurian Cucumaria japonica, which is not capable of healing skin wounds and ambulacrum reparation, no gelatinase activity was observed at the site of damage. A suggestion is made that proteinases play an important role in regeneration in holothurians. The most probable morphogenesis regulators are matrix metalloproteinases with gelatinase activity.
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Affiliation(s)
- I Yu Dolmatov
- National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia; Far Eastern Federal University, Vladivostok, 690950, Russia.
| | - A P Shulga
- National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia
| | - T T Ginanova
- National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia
| | - M G Eliseikina
- National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia
| | - N E Lamash
- National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia; Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, 152742, Nekouzskii raion, Yaroslavl oblast, Russia
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48
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Comba A, Maravic T, Valente L, Girlando M, Cunha SR, Checchi V, Salgarello S, Tay FR, Scotti N, Breschi L, Mazzoni A. Effect of benzalkonium chloride on dentin bond strength and endogenous enzymatic activity. J Dent 2019; 85:25-32. [PMID: 30998949 DOI: 10.1016/j.jdent.2019.04.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 04/11/2019] [Accepted: 04/13/2019] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVE This in vitro study evaluated at baseline (T0) and over time (T12 months), the effect of a multi-mode universal adhesive compared with two experimental formulations blended with different concentrations of benzalkonium chloride (BAC), on bond strength and endogenous enzymatic activity. METHODS AND MATERIALS Specimens were assigned to the following groups according to the adhesive protocol: G1) All-Bond Universal (ABU) self-etch (SE); G2) ABU + 0.5% BAC SE; G3) ABU + 1% methacrylate BAC SE; G4) ABU etch-and-rinse (E&R); G5) ABU + 0.5% BAC E&R; G6) ABU + 1% methacrylate BAC E&R. Gelatin zymography was performed on dentin powder obtained from eight human third molars. Endogenous enzymatic activity within the hybrid layer was examined using in situ zymography after 24 h (T0) or 1-year storage in artificial saliva (T12). Forty intact molars were prepared for microtensile bond strength test at T0 and T12. Results were statistically analyzed with three-way ANOVA (α = 0.05). RESULTS Gelatin zymography assay and in situ zymography quantification analyses indicated that all the BAC-containing formulations decreased matrix metalloproteinase expression. However, in situ zymography showed a general trend of enzymatic activity increase after aging. Microtensile bond-strength testing showed decrease in bond strength over time in all the tested groups; performances of the 1% methacrylate BAC experimental groups were worse than the control. CONCLUSIONS BAC-containing adhesives reduce endogenous enzymatic activity both immediately and over time. However, independently from the adhesive employed, increase in the gelatinolytic activity over time and decrease in bond strength was found (especially in the BAC + 1% methacrylate groups), probably due to impaired polymerization properties. CLINICAL SIGNIFICANCE Adhesives containing protease inhibitors are practical and efficient tools in clinical practice for enhancement of the longevity of dental restorations. However, extensive investigation of the mechanical and adhesive properties of the material is necessary prior to their clinical use.
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Affiliation(s)
- Allegra Comba
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy.
| | - Tatjana Maravic
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy.
| | - Lucrezia Valente
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy.
| | - Margherita Girlando
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy.
| | - Sandra R Cunha
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes 2227, 05508-000 São Paulo, Brazil.
| | - Vittorio Checchi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy.
| | - Stefano Salgarello
- Dipartimento di Specialità Medico-Chirurgiche, Scienze Radiologiche e Sanità Pubblica - Università degli Studi di Brescia, P.le Spedali Civili 1, 25123 Brescia, Italy.
| | - Franklin R Tay
- The Dental College of Georgia, Augusta University, 1430 John Wesley Gilbert Drive, Augusta, GA, USA.
| | - Nicola Scotti
- Department of Surgical Sciences, University of Turin, Dental School Lingotto, Via Nizza 230, 10100 Torino, Italy.
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy.
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna - Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy.
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49
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Comba A, Scotti N, Mazzoni A, Maravic T, Ribeiro Cunha S, Michelotto Tempesta R, Carossa M, Pashley DH, Tay FR, Breschi L. Carbodiimide inactivation of matrix metalloproteinases in radicular dentine. J Dent 2019; 82:56-62. [DOI: 10.1016/j.jdent.2019.01.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 01/14/2019] [Accepted: 01/21/2019] [Indexed: 12/01/2022] Open
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50
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Cadenaro M, Maravic T, Comba A, Mazzoni A, Fanfoni L, Hilton T, Ferracane J, Breschi L. The role of polymerization in adhesive dentistry. Dent Mater 2019; 35:e1-e22. [DOI: 10.1016/j.dental.2018.11.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/12/2018] [Accepted: 11/13/2018] [Indexed: 10/27/2022]
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