1
|
Gonçalves LL, Prakki A, Silva TMD, Bafail A, Bortolatto J, Stavroullakis AT, Gonçalves SEDP. Longitudinal bond strength of a universal adhesive and chemical dentin characterization under different acid etching protocols. J Appl Oral Sci 2024; 32:e20230359. [PMID: 38537030 PMCID: PMC11037927 DOI: 10.1590/1678-7757-2023-0359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 12/12/2023] [Accepted: 01/11/2024] [Indexed: 04/26/2024] Open
Abstract
OBJECTIVE This study aimed to analyze the longitudinal bond strength of a universal adhesive and chemically characterize the dentin substrate under different acid etching protocols. METHODOLOGY Dentin samples were etched with polyacrylic acid 25% (PAA) for 10 seconds (n=3) and phosphoric acid 32% (PA) for 15 seconds (n=3) and analyzed by Fourier transform infrared spectroscopy - attenuated total reflectance (FTIR-ATR) before and after treatment. For collagen degradation, samples (n=12) were divided into 3 groups: PAA, PA, and Deionized water (control), and analyzed by the quantity of solubilized type I collagen C-terminal cross-linked telopeptides and solubilized C-terminal peptide in relation to total protein concentration (ICTPtp and CTXtp) and by their ultimate tensile strength (UTS). For the adhesive interface analysis, dentin samples (n=72) were divided into 3 groups: PAA, PA, and Self-etch (SE), and subdivided into 2 groups: 24 h (baseline) and 1 year. The following tests were performed: microtensile bond strength (μTBS) (n=48), scanning electron microscopy (SEM) (n=12), and nanoleakage (n=12). RESULTS The FTIR of PAA showed lower reduction of the peaks in the phosphate group when compared to PA. For ICTPtp, PA showed a significantly higher value. For CTXtp, PA and PAA groups failed to statically differ from each other. UTS was significantly lower for PA. For μTBS, storage time significantly affected bond strength. The results were unaffected by the etching protocol. For SEM, after 1 year, PA had little evidence of degradation in the upper third of the adhesive interface in comparison to the other groups. Nanoleakage showed no considerable silver impregnation after 1 year in the SE group. CONCLUSION The use of PAA prior to a universal adhesive (when compared to PA) represents a less aggressive type of etching to dentin. However, self-etching still seems to be the best option for universal adhesive systems that have functional monomers in their composition.
Collapse
Affiliation(s)
- Lucélia Lemes Gonçalves
- Universidade Estadual Paulista (UNESP), Instituto de Ciência e Tecnologia da UNESP, Departamento de Odontologia Restauradora, São José dos Campos, Brasil
| | - Anuradha Prakki
- University of Toronto, Faculty of Dentistry, Dental Research Institute, Toronto, ON, Canada
| | - Tânia Mara da Silva
- Universidade Estadual Paulista (UNESP), Instituto de Ciência e Tecnologia da UNESP, Departamento de Odontologia Restauradora, São José dos Campos, Brasil
| | - Arwa Bafail
- Taibah University, College of Dentistry, Department of Restorative Dental Sciences, Madinah, Saudi Arabia
| | - Janaína Bortolatto
- University of Toronto, Faculty of Dentistry, Dental Research Institute, Toronto, ON, Canada
| | | | - Sérgio Eduardo de Paiva Gonçalves
- Universidade Estadual Paulista (UNESP), Instituto de Ciência e Tecnologia da UNESP, Departamento de Odontologia Restauradora, São José dos Campos, Brasil
| |
Collapse
|
2
|
Zhang M, Sun Z, Zhang B, Peng W, Guo L. Effects of dimethyl sulfoxide pretreatment on the bonding properties of fluorotic dentin of different severity: An in vitro study. J Prosthet Dent 2024; 131:508-517. [PMID: 35279300 DOI: 10.1016/j.prosdent.2022.01.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 01/30/2022] [Accepted: 01/31/2022] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM Bonding to fluorotic dentin is weaker than to sound dentin, but methods to improve bonding have not been well addressed. PURPOSE The purpose of this in vitro study was to investigate the effects of dimethyl sulfoxide (DMSO) pretreatment on the bond strength and resin-dentin surface of fluorotic dentin of different severity. MATERIAL AND METHODS Phosphoric acid-etched dentin specimens exhibiting mild fluorosis (ML-F), moderate fluorosis (MD-F), and severe fluorosis (SE-F) were randomly bonded with Single Bond 2 (SB2) pretreated with 50% DMSO (experimental groups) or deionized water (control groups). The bonded teeth were sectioned for microshear bond strength (μSBS) testing immediately or after aging, for micromorphology observation of the bonding interface under a scanning electron microscope, and for resin tags and microleakage evaluation under a confocal laser scanning microscope. The degree of conversion of the adhesive resin was calculated by Fourier transform infrared spectroscopy. According to varying bonding steps, the mineralized dentin powders of ML-F, MD-F, and SE-F were randomly divided into 4 subgroups (blank, PA, PA+SB2, and PA+DMSO+SB2) and incubated in artificial saliva to examine the level of enzymatic degradation product of type I collagen. Data were analyzed by using ANOVA and the Tukey test (α=.05). RESULTS Dental fluorosis and thermocycling had negative effects on μSBS (P<.001), while DMSO pretreatment preserved or even improved μSBS (P<.001). DMSO had no influence on the degree of conversion (P=.618). Significant effects were found for bonding steps (P<.001), but not that of dental fluorosis (P=.131) on the enzymatic degradation product of type I collagen. Images showed sparser and more expanded collagen fibril meshwork, deeper resin penetration, and less microleakage in the experimental groups. CONCLUSIONS DMSO pretreatment provided increased and durable dentin bonding to fluorotic dentin probably by dispersing collagen fibrils into a sparser network and inhibiting the degradation of type I collagen.
Collapse
Affiliation(s)
- Meifeng Zhang
- Graduate student, Graduate Prosthodontics, Department of Restorative Dentistry, Hospital of Stomatological Affiliated to Southwest Medical University, Luzhou, PR China
| | - Zhengfan Sun
- Graduate student, Graduate Prosthodontics, Department of Restorative Dentistry, Hospital of Stomatological Affiliated to Southwest Medical University, Luzhou, PR China
| | - Bo Zhang
- Graduate student, Graduate Oral Implantology, Department of Implant Dentistry, Hospital of Stomatological Affiliated to Southwest Medical University, Luzhou, PR China
| | - Wei Peng
- Graduate student, Graduate Oral Implantology, Department of Implant Dentistry, Hospital of Stomatological Affiliated to Southwest Medical University, Luzhou, PR China
| | - Ling Guo
- Professor, Department of Restorative and Implant Dentistry, Hospital of Stomatological Affiliated to Southwest Medical University, Luzhou, PR China.
| |
Collapse
|
3
|
Bourgi R, Cuevas-Suarez CE, Devoto W, Monjarás-Ávila AJ, Monteiro P, Kharma K, Lukomska-Szymanska M, Hardan L. Effect of contamination and decontamination methods on the bond strength of adhesive systems to dentin: A systematic review. J ESTHET RESTOR DENT 2023; 35:1218-1238. [PMID: 37395344 DOI: 10.1111/jerd.13078] [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: 04/14/2023] [Revised: 06/11/2023] [Accepted: 06/13/2023] [Indexed: 07/04/2023]
Abstract
INTRODUCTION In a suitable condition, it is important to perform any dental restorative procedure using an operatory field isolated. Then, the aim of this study was to compare the bond strength of composite restorations to dentin affected by any contamination agent through a systematic review. METHODS This systematic review was performed following the PRISMA 2020 guidelines. The literature search was conducted until September 2022 by scanning the following databases: Embase, PubMed, Scielo, Scopus, and Web of Science. Manuscripts evaluated the bond strength of resin-based materials to permanent human dentin contaminated with blood or saliva were selected for full-text review. The risk of bias was assessed by the RoBDEMAT tool. RESULTS A total of 3750 papers resulted from the search from all databases. After the full-text reading, a total of 62 articles remained for the qualitative analysis. The contamination agents used were blood, saliva, and hemostatic agents. A great variety of protocols were used to contaminate the dentin surface, and the contamination process occurred in several steps of the bonding process, including before and after the etching process, after the primer application and after the adhesive application. Also, several decontamination procedures were tested, including reapplication of the etching material, rinsing with water, chlorhexidine or sodium hypochlorite and reapplication of the adhesive system. CONCLUSION Any contamination with blood or saliva impaired the bond strength of resin-based materials to dentin. Decontamination procedures including water-spray and reapplication of the bonding system could revert the impairment produced by the saliva or blood contamination. The use of hemostatic agents as a method of blood decontamination is not recommended. CLINICAL SIGNIFICANCE Clinicians should avoid contamination during a bonding procedure, otherwise, a reduction in the bond quality is expected.
Collapse
Affiliation(s)
- Rim Bourgi
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut, Lebanon
- Department of Biomaterials and Bioengineering, INSERM UMR_S 1121, Biomaterials and Bioengineering, Strasbourg, France
| | - Carlos Enrique Cuevas-Suarez
- Dental Materials Laboratory, Academic Area of Dentistry, Autonomous University of Hidalgo State, Pachuca, Mexico
| | | | - Ana Josefina Monjarás-Ávila
- Dental Materials Laboratory, Academic Area of Dentistry, Autonomous University of Hidalgo State, Pachuca, Mexico
| | - Paulo Monteiro
- Clinical Research Unit (CRU), Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Egas Moniz, CRL, Caparica, Portugal
| | - Khalil Kharma
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut, Lebanon
| | | | - Louis Hardan
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut, Lebanon
| |
Collapse
|
4
|
Peled Y, Stewart CA, Glogauer M, Finer Y. The Role of Bacterial, Dentinal, Salivary, and Neutrophil Degradative Activity in Caries Pathogenesis. Dent J (Basel) 2023; 11:217. [PMID: 37754337 PMCID: PMC10528424 DOI: 10.3390/dj11090217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/28/2023] [Accepted: 09/06/2023] [Indexed: 09/28/2023] Open
Abstract
Until recently, it was widely accepted that bacteria participate in caries pathogenesis mainly through carbohydrate fermentation and acid production, which promote the dissolution of tooth components. Neutrophils, on the other hand, were considered white blood cells with no role in caries pathogenesis. Nevertheless, current literature suggests that both bacteria and neutrophils, among other factors, possess direct degradative activity towards both dentinal collagen type-1 and/or methacrylate resin-based restoratives and adhesives, the most common dental restoratives. Neutrophils are abundant leukocytes in the gingival sulcus, where they can readily reach adjacent tooth roots or gingival and cervical restorations and execute their degradative activity. In this review, we present the latest literature evidence for bacterial, dentinal, salivary, and neutrophil degradative action that may induce primary caries, secondary caries, and restoration failure.
Collapse
Affiliation(s)
- Yuval Peled
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (Y.P.); (C.A.S.); (M.G.)
| | - Cameron A. Stewart
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (Y.P.); (C.A.S.); (M.G.)
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3E2, Canada
| | - Michael Glogauer
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (Y.P.); (C.A.S.); (M.G.)
- Department of Dental Oncology, Maxillofacial and Ocular Prosthetics, Princess Margaret Cancer Centre, Toronto, ON M5G 2M9, Canada
| | - Yoav Finer
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada; (Y.P.); (C.A.S.); (M.G.)
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3E2, Canada
| |
Collapse
|
5
|
Alkattan R, Ajaj R, Koller G, Banerji S, Deb S. A self-etch bonding system with potential to eliminate selective etching and resist proteolytic degradation. J Dent 2023; 132:104501. [PMID: 36967082 DOI: 10.1016/j.jdent.2023.104501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/06/2023] [Accepted: 03/23/2023] [Indexed: 03/30/2023] Open
Abstract
OBJECTIVES Bonded restorations using self-etch (SE) systems exhibit a limited lifespan due to their susceptibility to hydrolytic, enzymatic or fatigue degradation and poor performance on enamel. This study was conducted to develop and assess the performance of a two-step SE system using a functional monomer bis[2-(methacryloyloxy)ethyl]phosphate (BMEP) and demonstrate a strategy to enhance stability of bonded resin composite restorations to both enamel and dentine. METHODS A two-step SE system was formulated with a primer containing BMEP, with an adhesive with or without BMEP, and compared to a commercial 10-MDP-containing system, ClearfilTM SE Bond 2 (CFSE). The systems were evaluated on enamel for surface roughness and microshear bond strength (µSBS) and on dentine for microtensile bond strength (µTBS), nanoleakage, MMP inhibition and cyclic flexural fatigue. RESULTS Whilst all bonding systems resulted in statistically similar µSBS, BMEP-based primers yielded greater enamel surface roughness than the CFSE primer. The BMEP-free adhesives resulted in statistically similar or higher µTBS and lower nanoleakage compared to CFSE. In situ zymography revealed minimal to no MMP activity within the hybrid layer of BMEP-based systems. The BMEP-free adhesive exhibited flexural strength and fatigue resistance statistically similar to CFSE. CONCLUSIONS Incorporation of BMEP in the primer led to satisfactory bond strengths with both enamel and dentine, potentially eliminating the need for selective enamel etching. Combined with an adhesive formulation that is solvent-free and hydrophobic, and confining the acidic functional monomer in the primer resulted in minimal interfacial leakage, and resistance to proteolytic degradation and the cyclic nature of chewing. CLINICAL SIGNIFICANCE The SE bonding system containing BMEP combines the potent etching of phosphoric acid with the therapeutic function of the phosphate-based monomer in creating a homogenous hybrid layer with protection against endogenous proteolytic enzymes. This strategy may overcome current challenges that arise during selective enamel etching.
Collapse
|
6
|
Dawasaz AA, Togoo RA, Mahmood Z, Ahmad A, Thirumulu Ponnuraj K. Remineralization of Dentinal Lesions Using Biomimetic Agents: A Systematic Review and Meta-Analysis. Biomimetics (Basel) 2023; 8:biomimetics8020159. [PMID: 37092411 PMCID: PMC10123630 DOI: 10.3390/biomimetics8020159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 04/25/2023] Open
Abstract
The objective of this article was to systematically provide an up-to-date review on the different methods of remineralizing human dentine using different biomimetic agents. The authors performed a systematic search within PubMed, Scopus, and Web of Science in addition to the grey literature in Google Scholar® using MeSH terms. The PICO question was P: human teeth dentinal sections; I: application of biomimetic remineralizing agents; C: other non-biomimetic approaches; O: extent of remineralization and physical properties of remineralized dentine. The initially identified studies were screened for titles and abstracts. Non-English articles, reviews, animal studies, studies involving the resin-dentine interface, and other irrelevant articles were then excluded. The other remaining full-text articles were retrieved. Bibliographies of the remaining articles were searched for relevant studies that could be included. A total of 4741 articles were found, and finally, 39 full-text articles were incorporated in the current systematic review. From these, twenty-six research studies used non-collagenous protein (NCP) analogs to biomineralize dentine, six studies used bioactive materials derived from natural sources, six studies used zinc hydroxyapatite, and one study used amelogenin peptide to induce hydroxyapatite formation on the surface of demineralized dentine. Additive effects of triclosan and epigenin were assessed when combined with commonly available NCPs. Overall, a moderate risk of bias was observed and, hence, the findings of the included studies could be acceptable. A meta-analysis of some similar studies was performed to assess the depth of remineralization and elastic modulus. Despite having high heterogeneity (I2 > 90), all the studies showed a significant improvement in biomimetic remineralization efficacy as compared to the control. All the included studies carried out a functional remineralization assessment and found a 90-98% efficacy in the extent of remineralization while the elastic modulus reached 88.78 ± 8.35 GPa, which is close to natural dentine. It is pertinent to note the limitations of these studies that have been carried out in vitro under controlled settings, which lack the effects of a natural oral environment. To conclude, the authors suggest that the biomimetic remineralization of dentine using NCP analogs, bioactive materials, and natural products carries significant potential in treating dentinal lesions; however, more long-term studies are needed to assess their clinical applications in vivo.
Collapse
Affiliation(s)
- Ali Azhar Dawasaz
- Department of Diagnostic Dental Sciences, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Rafi Ahmad Togoo
- Department of Pediatric Dentistry and Orthodontic Sciences, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
| | - Zuliani Mahmood
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Azlina Ahmad
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| | - Kannan Thirumulu Ponnuraj
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
- Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
| |
Collapse
|
7
|
Yang H, Lin XJ, Liu Q, Yu H. Effects of protease inhibitors on dentin erosion: an in situ study. Clin Oral Investig 2023; 27:1005-1012. [PMID: 35925407 DOI: 10.1007/s00784-022-04657-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 07/30/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVE This in situ study aimed to evaluate the effects of the inhibitors of matrix metalloproteinases (MMPs) and cysteine cathepsins on dentin erosion. MATERIALS AND METHODS Ten volunteers participated in this study. Each volunteer wore an intraoral appliance containing 4 dentin specimens subjected to different treatments: deionized water as a control, 1 mM 1,10-phenanthroline (an MMP inhibitor), 50 µM E-64 (a cysteine cathepsin inhibitor), and 1 mM 1,10-phenanthroline + 50 µM E-64. The specimens were dipped in 5 ml of the respective solutions for 30 min at room temperature and then exposed to in vivo erosive challenges by rinsing with 150 ml of a cola drink (4 × 5 min/day) for 7 days. The substance loss of the specimens was measured by profilometry. The transverse sections of the specimens were examined using scanning electron microscopy. Thereafter, the demineralized organic matrix (DOM) of the specimens was removed using type I collagen enzyme and assessed by performing profilometry. The differences in substance loss and DOM thickness among the groups were analyzed by one-way repeated-measures analysis of variance (ANOVA) and Bonferroni's test at a level of P < 0.05. RESULTS Protease inhibitors significantly reduced substance loss in comparison to that of the control group (all P < 0.05). A significantly thicker DOM was observed for the specimens treated with protease inhibitors than for the control specimens (all P < 0.05). No significant differences in substance loss or DOM thickness were found among the MMP inhibitor, cysteine cathepsin inhibitor, and MMP + cysteine cathepsin inhibitor groups. CONCLUSIONS The use of MMP and cysteine cathepsin inhibitors was shown to increase the acid resistance of human dentin, which may be due to the preservation of the DOM. CLINICAL RELEVANCE The application of protease inhibitors could be considered an appropriate preventive strategy for dentin erosion.
Collapse
Affiliation(s)
- Hui Yang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.,Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, Fuzhou, China
| | - Xiu-Jiao Lin
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.,Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, Fuzhou, China
| | - Qiong Liu
- Department of Pediatric Dentistry, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Hao Yu
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China. .,Research Center of Dental Esthetics and Biomechanics, Fujian Medical University, Fuzhou, China. .,Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan. .,Department of Prosthodontics, School and Hospital of Stomatology, Fujian Medical University, Yangqiao Zhong Road 246, Fuzhou, 350002, China.
| |
Collapse
|
8
|
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.
Collapse
|
9
|
Salim I, Seseogullari-Dirihan R, Imazato S, Tezvergil-Mutluay A. The inhibitory effects of various ions released from S-PRG fillers on dentin protease activity. Dent Mater J 2023; 42:99-104. [PMID: 36450455 DOI: 10.4012/dmj.2022-141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
This study investigates the effect of ions released from S-PRG fillers on host-derived enzymatic degradation of dentin collagen matrices. Dentin beams (n=80) were demineralized and distributed to eight groups following baseline dry mass and total MMP activity assessments. Each group treated with boron, fluoride, sodium, silicone, strontium, aluminium, or S-PRG eluate solutions for 5 min. Untreated beams served as control. After pre-treatment, MMP activity was reassessed, beams were incubated in complete medium for 1 week, dry mass was reassessed. Incubation media were analyzed for MMP and cathepsin-K-mediated degradation fragments. Data were analyzed with ANOVA and Tukey's test. All pretreatment groups showed significant reduction in total MMP activity (p<0.05) that was sustainable after incubation in all groups except for boron and silicone groups (p<0.05). Cathepsin-K activity did not differ between control or treatment groups. The results indicated that ions released from S-PRG fillers have the potential to partly inhibit MMP-mediated endogenous enzymatic activity.
Collapse
Affiliation(s)
- Ikram Salim
- Finnish Doctoral Program in Oral Sciences (FINDOS), University of Turku, Institute of Dentistry.,Department of Cariology and Restorative Dentistry, Institute of Dentistry, University of Turku.,Adhesive Dentistry Research Group, Biomaterials, and Medical Device Research Program, Biocity
| | - Roda Seseogullari-Dirihan
- Department of Cariology and Restorative Dentistry, Institute of Dentistry, University of Turku.,Adhesive Dentistry Research Group, Biomaterials, and Medical Device Research Program, Biocity
| | - Satoshi Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry
| | - Arzu Tezvergil-Mutluay
- Department of Cariology and Restorative Dentistry, Institute of Dentistry, University of Turku.,Adhesive Dentistry Research Group, Biomaterials, and Medical Device Research Program, Biocity.,Turku University Hospital, TYKS, University of Turku
| |
Collapse
|
10
|
Forgione D, Nassar M, Seseogullari-Dirihan R, Jamleh A, Tezvergil-Mutluay A. Effect of phytic acid on dentinal collagen solubilization and its binding and debinding potentials to dentin. J Dent 2023; 128:104361. [PMID: 36379300 DOI: 10.1016/j.jdent.2022.104361] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 11/05/2022] [Accepted: 11/08/2022] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES To study phytic acid (IP6) effect on collagen solubilization by assessing hydroxyproline (HYP) release, evaluate its binding to demineralized (DD) and mineralized dentin (MD) and determine the effect of different media on debinding of IP6. METHODS Demineralized dentin beams were incubated in 1%, 2% or 3% IP6 and HYP release was evaluated at 1 or 3 weeks and compared to those obtained in untreated control or phosphoric acid (PA)-treated beams. DD or MD powder was treated with 1%, 2% or 3% IP6 and the decrease in IP6 amount was quantitated by ultraviolet-visible spectroscopy. IP6-treated samples were re-suspended in distilled water, ethanol, urea or sodium chloride and the amount of IP6 displaced was determined. RESULTS At 1 week, the control group and IP6 showed lower HYP release when compared to PA (P < 0.05). There was no difference among PA, IP6 and control at 3 weeks (P = 0.22). IP6 binding was concentration dependent. 1% IP6 had higher binding potential with MD compared to DD while 2% IP6 showed the opposite result (P<0.05). 3% IP6 had similar binding values between DD and MD (P = 0.53). The highest debinding in MD occurred with urea for 2%, 3% and 1% IP6 in descending manner. Within each concentration of IP6 in DD, the highest debinding effect was reported with ethanol. CONCLUSIONS IP6 bound to DD and MD in a concentration-dependent manner. IP6 was debound from DD mostly by the action of ethanol, while in MD, urea caused the most displacement. Collagen solubilization of IP6-treated DD was comparable to untreated DD. CLINICAL SIGNIFICANCE These findings add to the potential use of IP6 as an alternative to PA for dentin etching which possibly results in long-term stability of resin-dentin adhesion.
Collapse
Affiliation(s)
| | - Mohannad Nassar
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates.
| | | | - Ahmed Jamleh
- Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, National Guard Health Affairs, Riyadh, Saudi Arabia; King Abdullah International Medical Research Centre, National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Arzu Tezvergil-Mutluay
- Institute of Dentistry, University of Turku, Turku, Finland; Turku University Hospital, Turku, Finland
| |
Collapse
|
11
|
Agrawal P, Nikhade P, Chandak M, Ikhar A, Bhonde R. Dentin Matrix Metalloproteinases: A Futuristic Approach Toward Dentin Repair and Regeneration. Cureus 2022; 14:e27946. [PMID: 36120221 PMCID: PMC9464706 DOI: 10.7759/cureus.27946] [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: 07/31/2022] [Accepted: 08/12/2022] [Indexed: 11/05/2022] Open
Abstract
Matrix metalloproteinases (MMPs) have been linked to modulating healing during the production of tertiary dentin, as well as the liberation of physiologically active molecules and the control of developmental processes. Although efforts to protect dentin have mostly centered on preventing these proteases from doing their jobs, their role is actually much more intricate and crucial for dentin healing than anticipated. The role of MMPs as bioactive dentin matrix components involved in dentin production, repair, and regeneration is examined in the current review. The mechanical characteristics of dentin, especially those of reparative and reactionary dentin, and the established functions of MMPs in dentin production are given particular attention. Because they are essential parts of the dentin matrix, MMPs should be regarded as leading applicants for dentin regeneration.
Collapse
|
12
|
Neshatian M, Holcroft J, Kishen A, De Souza G, Ganss B. Promoting mineralization at biological interfaces Ex vivo with novel amelotin-based bio-nano complexes. Mater Today Bio 2022; 14:100255. [PMID: 35464740 PMCID: PMC9020105 DOI: 10.1016/j.mtbio.2022.100255] [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: 01/13/2022] [Revised: 04/01/2022] [Accepted: 04/02/2022] [Indexed: 12/31/2022] Open
Abstract
Conclusion AMTN/AMTN-Col functionalized HANP are potent mineral-promoting bio-nano complexes. AMTN/AMTN-Col coated HANP promote collagen mineralization. AMTN/AMTN-Col coated HANP enhance resin-dentin bond strength. AMTN/AMTN-Col coated HANP are potential candidates for clinical application.
Collapse
|
13
|
Paschoini VL, Ziotti IR, Neri CR, Corona SAM, Souza-Gabriel AE. Chitosan improves the durability of resin-dentin interface with etch-and-rinse or self-etch adhesive systems. J Appl Oral Sci 2021; 29:e20210356. [PMID: 34910075 PMCID: PMC8687651 DOI: 10.1590/1678-7757-2021-0356] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 10/15/2021] [Indexed: 11/22/2022] Open
Abstract
Degradation of the dentin-resin interface can occur due to hydrolysis of exposed collagen, resulting in reduced bond strength. This study assessed the effect of dentin treatment with chitosan combined with an etch-and-rinse or self-etch adhesive system on improvement of bond strength and preservation of the interface durability.
Collapse
Affiliation(s)
- Vitória Leite Paschoini
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Odontologia Restauradora, Ribeirão Preto, Brasil
| | - Isabella Rodrigues Ziotti
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Odontologia Restauradora, Ribeirão Preto, Brasil
| | - Cláudio Roberto Neri
- Universidade de São Paulo, Faculdade de Filosofia, Ciências e Letras, Departamento de Química, Ribeirão Preto, Brasil
| | - Silmara Aparecida Milori Corona
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Odontologia Restauradora, Ribeirão Preto, Brasil
| | - Aline Evangelista Souza-Gabriel
- Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Odontologia Restauradora, Ribeirão Preto, Brasil
| |
Collapse
|
14
|
Tekbas Atay M, Seseogullari-Dirihan R, Mutluay MM, Tezvergil-Mutluay A. Long-term effect of curcuminoid treatment on resin-to-dentin bond strength. Eur J Oral Sci 2021; 130:e12837. [PMID: 34865272 DOI: 10.1111/eos.12837] [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: 03/12/2021] [Accepted: 10/14/2021] [Indexed: 10/19/2022]
Abstract
Endogenous dentin proteases contribute to the degradation of collagen fibrils in the hybrid layer. Recently, inhibition of host-derived proteases by curcuminoids has shown promising results. The aim of this study was to evaluate the effect of curcuminoid treatment on the microtensile bond strength (μTBS) after 24 h or 12 months of storage. Fifty-four extracted sound human molars were flattened to mid-coronal dentin and divided into nine groups. After phosphoric acid-etching for 15 s, the dentin was experimentally treated for 60 s using 100 μM or 200 μM of curcumin, diflourobenzocurcumin, or demethoxycurcumin dissolved in 1% and 2% dimethyl sulfoxide (DMSO)/water solutions. Untreated and DMSO-treated groups served as controls. After bonding agent application, each tooth was restored with dental composite. The molars were sectioned into 0.9 × 0.9 × 6 mm beams. The μTBS testing was performed after 24 h and 12 months of storage in artificial saliva. Data were analyzed using regression analyses. Failure patterns were evaluated using scanning electron microscopy. Dentin treatment with curcuminoids did not adversely affect 24-h μTBS compared to controls. After 12 months, the μTBS of curcuminoid groups was statistically significantly higher than the controls. This study indicates the feasibility of using curcuminoids as protease inhibitors.
Collapse
Affiliation(s)
- Meltem Tekbas Atay
- Department of Restorative Dentistry, Faculty of Dentistry, University of Trakya, Edirne, Turkey
| | - Roda Seseogullari-Dirihan
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland
| | - Mustafa Murat Mutluay
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland.,Department of Prosthetic Dentistry, Institute of Dentistry, University of Eastern Finland, Kuopio, Finland
| | - Arzu Tezvergil-Mutluay
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland.,Turku University Hospital, TYKS, University of Turku, Turku, Finland
| |
Collapse
|
15
|
Abstract
Matrix metalloproteinases (MMPs) have been implicated not only in the regulation of developmental processes but also in the release of biologically active molecules and in the modulation of repair during tertiary dentine formation. Although efforts to preserve dentine have focused on inhibiting the activity of these proteases, their function is much more complex and necessary for dentine repair than expected. The present review explores the role of MMPs as bioactive components of the dentine matrix involved in dentine formation, repair and regeneration. Special consideration is given to the mechanical properties of dentine, including those of reactionary and reparative dentine, and the known roles of MMPs in their formation. MMPs are critical components of the dentine matrix and should be considered as important candidates in dentine regeneration.
Collapse
Affiliation(s)
- E. Guirado
- Department of Oral Biology, University of Illinois at Chicago College of Dentistry, Chicago, USA
| | - A. George
- Department of Oral Biology, University of Illinois at Chicago College of Dentistry, Chicago, USA
| |
Collapse
|
16
|
Stasic JN, Pficer JK, Milicic B, Puač N, Miletic V. Effects of non-thermal atmospheric plasma on dentin wetting and adhesive bonding efficiency: Systematic review and meta-analysis. J Dent 2021; 112:103765. [PMID: 34363890 DOI: 10.1016/j.jdent.2021.103765] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/20/2021] [Accepted: 07/30/2021] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVES This systematic review and meta-analysis evaluated the effects of non-thermal atmospheric plasma (NTAP) treatment on dentin wetting and adhesive-dentin bond strength. DATA/SOURCES This report followed the PRISMA 2020 statement. Two reviewers conducted literature search of MEDLINE, Web of Science and Scopus databases up to the end of November 2020. Included in vitro studies compared the effect of NTAP on treated dentin of non-carious, intact, extracted human third molar teeth with different control groups. Studies with no adequate methods, missing data, lack of control group, or those using animal teeth were excluded. The random effects model was used to summarize the treatment effect with standardized mean difference (SMD) and 95% CI. Risk of bias was assessed using the custom Cochrane Collaboration's tool. STUDY SELECTION/RESULTS Seventeen studies met inclusion criteria. The effects on dentin wetting were reported in favor of NTAP (SMD -5.38; 95% CI [-6.97, -3.78]; p<0.00001; I2=81%). Regarding adhesive-dentin bond strength, statistically significant differences between the NTAP and control group were in favor of NTAP in the short-term (SMD 1.92; 95%CI [1.35, 2.50]; p<0.00001; I2=97%), and long-term (SMD 3.28; 95%CI [2.46, 4.09]; p<0.00001; I2=97%). A limitation of meta-analysis is moderate heterogeneity caused by methodological differences and lack of data, which was evaluated through risk of bias and sensitivity analysis. CONCLUSIONS NTAP substantially improves dentin wetting and adhesive-dentin bond strength with 30 seconds exposure time and up to 10 mm tip-to-surface distances being sufficient for positive NTAP effects on bonding efficiency. FUNDING ON172207 and III41008 from the Ministry of Education, Science and Technological Development, Republic of Serbia. NP is funded by MESTD grant number 451-03-68/2020-14/200024. CLINICAL SIGNIFICANCE This systematic review and meta-analysis substantiate potential applicability of NTAP treatment of dentin in improving adhesive bonding clinically. Further research should be based on the optimized parameters such as time and distance with additional refinement of NTAP power.
Collapse
Affiliation(s)
- Jovana N Stasic
- DentalNet Research Group, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Jovana Kuzmanovic Pficer
- Department for Medical Statistics and Informatics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Biljana Milicic
- Department for Medical Statistics and Informatics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Nevena Puač
- Institute of Physics, University of Belgrade, Pregrevica 118, Belgrade, Serbia
| | - Vesna Miletic
- Sydney Dental School, Faculty of Medicine and Health, The University of Sydney, Surry Hills 2010, Australia.
| |
Collapse
|
17
|
Effect of chlorhexidine-loaded poly(amido amine) dendrimer on matrix metalloproteinase activities and remineralization in etched human dentin in vitro. J Mech Behav Biomed Mater 2021; 121:104625. [PMID: 34130080 DOI: 10.1016/j.jmbbm.2021.104625] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/19/2021] [Accepted: 05/23/2021] [Indexed: 02/08/2023]
Abstract
To investigate the effect of chlorhexidine (CHX)-loaded carboxyl-terminated poly (amido amine) dendrimer (CHX-PAMAM-COOH) on matrix metalloproteinase (MMP) activities and remineralization in human dentin, CHX-PAMAM-COOH was prepared and characterized by Fourier-transform infrared spectroscopy. The inhibitory effects of CHX, PAMAM-COOH, and CHX-PAMAM-COOH on soluble recombinant human matrix metalloproteinase (rhMMP-2) and dentin-bound endogenous MMP activity were measured using an MMP Activity Assay Kit. In situ zymography was performed to evaluate the gelatinase activity in dentin pretreated with CHX, PAMAM-COOH, and CHX-PAMAM-COOH. The remineralization of etched dentin pretreated with CHX, PAMAM-COOH, and CHX-PAMAM-COOH was evaluated by field emission-scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS) after incubation in artificial saliva for 14 days. The results of the rhMMP-2 activity assay showed that the MMP-2 activity in the CHX-PAMAM-COOH group and the CHX group decreased significantly to 5.58 ± 0.85% (P < 0.05) and 4.86 ± 1.12% (P < 0.05), respectively, but that in the PAMAM-COOH group increased significantly to 213.38 ± 0.11% (P < 0.05). The results of total MMP activity and in situ zymography showed a significant reduction in endogenous gelatinase activity in dentin in the CHX-PAMAM-COOH group and the CHX group. The SEM and EDS results showed that rod-like crystals were formed on the etched dentin surface in the PAMAM-COOH group and the CHX-PAMAM-COOH group, and their Ca/P ratios were 1.73 and 1.71, respectively. In conclusion, CHX-PAMAM-COOH can inhibit dentin-bound endogenous MMPs and induce remineralization in etched dentin simultaneously. However, it is important to note that the catalytic role of PAMAM dendrimers may have an undesired excitatory effect on MMP activity, which cannot be ignored if PAMAM dendrimers were used alone in the oral environment.
Collapse
|
18
|
Forgione D, Nassar M, Seseogullari-Dirihan R, Thitthaweerat S, Tezvergil-Mutluay A. The effect of phytic acid on enzymatic degradation of dentin. Eur J Oral Sci 2021; 129:e12771. [PMID: 33644893 DOI: 10.1111/eos.12771] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 01/09/2021] [Accepted: 01/12/2021] [Indexed: 11/29/2022]
Abstract
We evaluated the effect of phytic acid on matrix metalloproteinase (MMP)- or cysteine cathepsin (CC)-mediated dentin degradation. Demineralized dentin beams were divided into five groups (n = 12) and treated with 1%, 2%, or 3% phytic acid or with 37% phosphoric acid. Untreated demineralized beams served as controls. After incubation for 1 or 3 wk, dry mass loss was determined and aliquots of incubation media were analysed for cross-linked telopeptide of type I collagen (ICTP) fragments for MMP-mediated and c-terminal telopeptide of type I collagen (CTX) for cathepsin-k-mediated degradation. The direct effect of phytic acid was evaluated using MMP activity assay. Data were analysed using repeated-measures anova. ICTP releases with 1% and 2% phytic acid treatment were statistically significantly lower than those following phosphoric acid treatment at 3 wk. The CTX release for phytic acid-treated beams at 3 wk was not significantly different from that of untreated control beams, but it was significantly lower than that of phosphoric acid-treated beams. Their MMP activities at 3 wk were not significantly different from those of the controls but they were significantly lower than those seen for phosphoric acid-treated beams. Compared to phosphoric acid, phytic acid treatment resulted in a reduced dentinal host-derived endogenous enzymatic activity and collagen degradation.
Collapse
Affiliation(s)
| | - Mohannad Nassar
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | | | | | - Arzu Tezvergil-Mutluay
- Institute of Dentistry, University of Turku, Turku, Finland.,Turku University Hospital, Turku, Finland
| |
Collapse
|
19
|
Vidal CDMP, LaRoy C, Chagas Toledo D, da Mata Almeida L, Qian F, Hilgert LA, Bedran-Russo AK. Hydroxy acids for adhesion to enamel and dentin: Long-term bonding performance and effect on dentin biostability. J Dent 2021; 107:103613. [PMID: 33617943 DOI: 10.1016/j.jdent.2021.103613] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/09/2021] [Accepted: 02/17/2021] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVES To test the demineralization potential, bonding performance, and dentin biostability when using hydroxy acids for etching enamel and dentin. METHODS Surface microhardness, roughness and depth of demineralization were investigated after etching enamel and dentin with 35 % glycolic acid (Gly), tartaric acid (Ta), gluconic acid (Glu), gluconolactone (Gln), or phosphoric acid (Pa) (n = 5/group). Dentin microtensile bond strength (μTBS) after 24 h or 1 year of bonding (n = 8 teeth/group) and enamel shear bond strength (SBS) after 24 h (n = 10 teeth/group) were obtained. In dentin, failure mode was classified as adhesive, cohesive in dentin/resin, or mixed. Dentin biostability was assessed by loss of dry weight and collagen degradation after 30-day incubation (n = 10 beams/group). Statistical analysis consisted of ANOVA with post-hoc Tukey's HSD, Tukey-Kramer test, Bonferroni correction, and Fisher's exact tests (α = 0.05). RESULTS Gly showed better or similar results than Pa for enamel microhardness and dentin roughness, while no significant differences were observed among Ta, Glu, and Gln (p > .05). Hydroxy acids produced significantly shallower demineralization than Pa (p < .05). Gln resulted in the lowest SBS and μTBS, while Gly, Glu, Ta, and Pa showed no significant difference. There was no significant difference in μTBS between 24 h and 1 year of storage. The association between failure mode and etchant was statistically significant after 24 h only (p < .001). Hydroxy acids resulted in higher dentin biostability than Pa (p < .05). CONCLUSIONS Gly, Glu and Ta resulted in adequate bonding performance and reduced dentin degradation and are potential alternative etchants to improve long-term stability of adhesive restorations. CLINICAL SIGNIFICANCE This study supports the potential use of hydroxy acids as alternative etchants when bonding to enamel and dentin and demonstrates that specific acids are more suitable to be used in adhesion since they result in appropriate bond strength and less dentin degradation.
Collapse
Affiliation(s)
| | - Caroline LaRoy
- College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, United States
| | | | | | - Fang Qian
- Division of Biostatistics, College of Dentistry and Dental Clinics, University of Iowa, Iowa City, IA, United States
| | - Leandro Augusto Hilgert
- Department of Dentistry, School of Health Sciences, University of Brasilia, Brasilia, DF, Brazil
| | - Ana K Bedran-Russo
- Department of General Dental Sciences, School of Dentistry, Marquette University, Milwaukee, WI, United States
| |
Collapse
|
20
|
Münchow EA, da Silva AF, Piva E, Cuevas-Suárez CE, de Albuquerque MTP, Pinal R, Gregory RL, Breschi L, Bottino MC. Development of an antibacterial and anti-metalloproteinase dental adhesive for long-lasting resin composite restorations. J Mater Chem B 2020; 8:10797-10811. [PMID: 33169763 PMCID: PMC7744429 DOI: 10.1039/d0tb02058c] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Despite all the advances in adhesive dentistry, dental bonds are still fragile due to degradation events that start during application of adhesive agents and the inherent hydrolysis of resin-dentin bonds. Here, we combined two outstanding processing methods (electrospinning and cryomilling) to obtain bioactive (antimicrobial and anti-metalloproteinase) fiber-based fillers containing a potent matrix metalloproteinase (MMP) inhibitor (doxycycline, DOX). Poly(ε)caprolactone solutions containing different DOX amounts (0, 5, 25, and 50 wt%) were processed via electrospinning, resulting in non-toxic submicron fibers with antimicrobial activity against Streptococcus mutans and Lactobacillus. The fibers were embedded in a resin blend, light-cured, and cryomilled for the preparation of fiber-containing fillers, which were investigated with antibacterial and in situ gelatin zymography analyzes. The fillers containing 0, 25, and 50 wt% DOX-releasing fibers were added to aliquots of a two-step, etch-and-rinse dental adhesive system. Mechanical strength, hardness, degree of conversion (DC), water sorption and solubility, bond strength to dentin, and nanoleakage analyses were performed to characterize the physico-mechanical, biological, and bonding properties of the modified adhesives. Statistical analyses (ANOVA; Kruskal-Wallis) were used when appropriate to analyze the data (α = 0.05). DOX-releasing fibers were successfully obtained, showing proper morphological architecture, cytocompatibility, drug release ability, slow degradation profile, and antibacterial activity. Reduced metalloproteinases (MMP-2 and MMP-9) activity was observed only for the DOX-containing fillers, which have also demonstrated antibacterial properties against tested bacteria. Adhesive resins modified with DOX-containing fillers demonstrated greater DC and similar mechanical properties as compared to the fiber-free adhesive (unfilled control). Concerning bonding performance to dentin, the experimental adhesives showed similar immediate bond strengths to the control. After 12 months of water storage, the fiber-modified adhesives (except the group consisting of 50 wt% DOX-loaded fillers) demonstrated stable bonds to dentin. Nanoleakage was similar among all groups investigated. DOX-releasing fibers showed promising application in developing novel dentin adhesives with potential therapeutic properties and MMP inhibition ability; antibacterial activity against relevant oral pathogens, without jeopardizing the physico-mechanical characteristics; and bonding performance of the adhesive.
Collapse
Affiliation(s)
- Eliseu A. Münchow
- Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS 90035-003, Brazil
| | - Adriana F. da Silva
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS 96015-560, Brazil
| | - Evandro Piva
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS 96015-560, Brazil
| | - Carlos E. Cuevas-Suárez
- Dental Materials Laboratory, Academic Area of Dentistry, Autonomous University of Hidalgo State, Circuito Ex Hacienda La Concepción S/N, San Agustín Tlaxiaca, Hgo, 42160 Mexico
| | - Maria T. P. de Albuquerque
- Department of Clinical Dentistry, Endodontics, Federal University of Bahia, Salvador, BA 40110-040, Brazil
| | - Rodolfo Pinal
- Department of Industrial and Physical Pharmacy, Purdue University, College of Pharmacy, West Lafayette, IN 47907, USA
| | - Richard L. Gregory
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, Indiana University School of Dentistry (IUSD), Indianapolis, IN 46202, USA
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna, Alma Mater Studiorum, Bologna, Italy
| | - Marco C. Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
| |
Collapse
|
21
|
Ahmet BSO, Seseogullari-Dirihan R, Tezvergil-Mutluay A. Activation of matrix-bound endogenous proteases by self-etch adhesives. Dent Mater J 2020; 39:1044-1049. [PMID: 33028790 DOI: 10.4012/dmj.2019-304] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The study evaluated changes in total enzymatic activity and degradation of demineralized dentin following the application of universal or self-etch adhesives. The universal adhesives -Scotchbond Universal (SU) and All-Bond Universal (ABU) and self-etch adhesives -Adper Easy Bond (EB) and G-aenial Bond (GB) were used for 2 min pretreatment of the dentin beams. Phosphoric acid (PA) treatment as well as no treatment served as controls. Total enzymatic activity was analyzed before and after treatment, collagen degradation was assessed using mass loss, C-terminal telopeptide (CTX) and C-terminal-telopeptide of type I collagen (ICTP) release (24 h, 3-day, 3-week). Over three weeks of incubation, ICTP release of ABU treated beams was significantly higher than other groups (p<0.05), except for SU treated beams (p>0.05) and CTX release of GB treated beams was the highest among the groups with statistically significant difference (p<0.05). The results confirm that the universal adhesives tested have also potential to increase the enzymatic activity in dentin.
Collapse
Affiliation(s)
| | - Roda Seseogullari-Dirihan
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku
| | - Arzu Tezvergil-Mutluay
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku.,Turku University Hospital, TYKS, University of Turku
| |
Collapse
|
22
|
AlQranei MS, Balhaddad AA, Melo MAS. The burden of root caries: Updated perspectives and advances on management strategies. Gerodontology 2020; 38:136-153. [PMID: 33236462 DOI: 10.1111/ger.12511] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/26/2020] [Accepted: 11/02/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND Root caries has gained much attention in the last few years. As the world's population is ageing and people currently tend to retain more teeth compared with older generations, there is an increased prevalence of periodontal disease and gingival recession, which may accelerate the onset of root caries. OBJECTIVE This review aims to summarise recent findings related to the diagnosis, prevention and treatment of root caries. MATERIALS AND METHODS MEDLINE (OVID) and Scopus (Elsevier) searches were performed to identify and discuss articles that address the pathogenicity and clinical management of root caries. RESULTS Root caries is a multifactorial disease. Cariogenic species involved in root caries are less dependent on carbohydrates since collagen degradation inside the dentinal tubules can provide nutrients and microcavities for the invading microorganisms. Furthermore, the root surface has fewer minerals in comparison with enamel, which may accelerate the onset of demineralisation. Root caries could be prevented by patient education, modification of risk factors, and the use of in-office and home remineralisation tools. The use of non-invasive approaches to control root caries is recommended, as the survival rate of root caries restorations is poor. When plaque control is impossible and a deep/large cavity is present, glass ionomer or resin-based restorations can be placed. CONCLUSION The assessment of root carious lesions is critical to determine the lesion activity and the required intervention. Dental practitioners should also be aware of different prevention and treatment approaches to design optimum oral health care for root caries-affected patients.
Collapse
Affiliation(s)
- Mohammed S AlQranei
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Abdulrahman A Balhaddad
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Mary A S Melo
- Division of Operative Dentistry, Department of General Dentistry, University of Maryland Dental School, Baltimore, MD, USA
| |
Collapse
|
23
|
Bafail A, Carrilho MR, Kishen A, Prakki A. Effect of protease inhibitor specificity on dentin matrix properties. J Mech Behav Biomed Mater 2020; 109:103861. [PMID: 32543386 DOI: 10.1016/j.jmbbm.2020.103861] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/11/2020] [Accepted: 05/12/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To evaluate protease activity of dentin matrices subjected to treatment with non-specific (chlorhexidine - CHX), cysteine cathepsin specific (E-64), and cysteine cathepsin-K (CT-K) specific (Odanacatib - ODN) inhibitors. METHODS Pulverized dentin powder obtained from human dentin disks (0.5 mm thickness) completely demineralized with 10% H3PO4 were challenged in 1 mL lactic acid (LA) (0.1M, pH 5.5) or stored in deionized water for 30 min. Aliquots of dentin powder were then immersed in 1 mL of CHX (2%), E-64 (10 μM and 20 μM) or Odanacatib (0.2 nM and 1 μM) for 30min. Degradation of dentin collagen was determined by telopeptide assays measuring the sub-product release of C-terminal cross-linked telopeptides (ICTP) and C-terminal peptide (CTX) in incubation media, which correlates with matrix metalloproteinases (MMP) and CT-K activities respectively (n = 3). The ICTP and CTX data were normalized to concentration of total protein (ICTPtp and CTXtp) in the media, measured by bicinchoninic acid assay. Dentin matrix properties were also measured by gravimetric change (n = 8) and ultimate tensile strength (UTS) (n = 10). Data were analyzed by one-way ANOVA followed by Tukey's post-hoc test and independent t-test (α = 5%). RESULTS Telopeptide assays showed significantly lower CTXtp values after treatment with E-64 and Odanacatib. E-64 and Odanacatib at all tested concentrations significantly reduced the release of ICTPtp. Gravimetric analysis showed no significant difference between the tested inhibitors and control except for CHX after lactic acid challenge. UTS results showed significantly higher values for E-64 (20 μM) and Odanacatib (0.2 nM and 1 μM) groups in deionized water. SIGNIFICANCE Dentin therapies targeting enzymes such as CT-K by specific inhibitors may provide superior pharmacokinetics and optimum efficacy due to precise protein binding, consequently limiting collagen degradation directly or indirectly by enzyme related pathways.
Collapse
Affiliation(s)
- Arwa Bafail
- Dental Research Institute, Faculty of Dentistry, University of Toronto, 124 Edward St, Toronto, ON, M5G 1G6, Canada; Restorative Dental Sciences, Faculty of Dentistry, Taibah University, Janadah Bin Umayyah Road, Tayba, Medina, 42353, Saudi Arabia
| | - Marcela Rocha Carrilho
- College of Dental Medicine Illinois, Midwestern University, 555 31st Street, Downers Grove, IL, 60515, USA
| | - Anil Kishen
- Dental Research Institute, Faculty of Dentistry, University of Toronto, 124 Edward St, Toronto, ON, M5G 1G6, Canada
| | - Anuradha Prakki
- Dental Research Institute, Faculty of Dentistry, University of Toronto, 124 Edward St, Toronto, ON, M5G 1G6, Canada.
| |
Collapse
|
24
|
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.
Collapse
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
| |
Collapse
|
25
|
Atesci AA, Avci CB, Tuglu MI, Ozates Ay NP, Eronat AC. Effect of Different Dentin Conditioning Agents on Growth Factor Release, Mesenchymal Stem Cell Attachment and Morphology. J Endod 2019; 46:200-208. [PMID: 31812361 DOI: 10.1016/j.joen.2019.10.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/17/2019] [Accepted: 10/28/2019] [Indexed: 02/06/2023]
Abstract
INTRODUCTION EDTA has been considered the gold standard in regenerative endodontic treatments. The aim of this study was to evaluate the effects of different dentin conditioning agents other than EDTA on released growth factors, mesenchymal stem cell attachment, and morphology. METHODS Transforming growth factor beta 1, vascular endothelial growth factor, bone morphogenetic protein 2, and fibroblast growth factor 2 release from prepared dentin discs conditioned with 17% EDTA, 10% citric acid, 1% phytic acid (IP6), or 37% phosphoric acid were quantified using the enzyme-linked immunosorbent assay after final irrigation and after 3 days of adipose-derived mesenchymal stem cell (adMSC) seeding. Forty root fragments were prepared from extracted single-rooted teeth. The morphology and attachment of adMSCs on the conditioned root fragments were observed using a scanning electron microscope. Data for growth factor quantification were analyzed using 1-way analysis. RESULTS The highest transforming growth factor beta 1 release was observed after citric acid treatment followed by phosphoric acid; there was no significant difference between them, but compared with EDTA and 1% IP6, there were significant differences observed. The enzyme-linked immunosorbent assay detected a very minor exposure of vascular endothelial growth factor and fibroblast growth factor 2 after dentin conditioning, but there were no significant differences between the groups. The greatest bone morphogenetic protein 2 release was observed in the 1% IP6 group, but there were no significant differences between the groups. Three days of adMSC seeding after dentin conditioning has made a dramatic increase in all of the growth factors, and phosphoric acid appeared to be the most effective agent with significant differences compared with the remaining groups. Scanning electron microscopic observations showed that none of the conditioning solutions had an adverse effect on stem cell proliferation and attachment to root dentin. Different cell morphologies like round, oblong, flat, and well-attached cells with developed filopodia were observed in the dentin-conditioned groups. CONCLUSIONS Phosphoric acid conditioning could be useful and may have beneficial effects in regenerative endodontic treatments.
Collapse
Affiliation(s)
- Alp Abidin Atesci
- Department of Pediatric Dentistry, School of Dentistry, Ege University, Izmir, Turkey.
| | - Cigir Biray Avci
- Department of Medical Biology, School of Medicine, Ege University, Izmir, Turkey
| | - Mehmet Ibrahim Tuglu
- Department of Histology and Embryology, School of Medicine, Celal Bayar University, Manisa, Turkey
| | | | - Ahmet Cemal Eronat
- Department of Pediatric Dentistry, School of Dentistry, Ege University, Izmir, Turkey
| |
Collapse
|
26
|
Haralur SB, Alharthi SM, Abohasel SA, Alqahtani KM. Effect of Decontamination Treatments on Micro-Shear Bond Strength between Blood-Saliva-Contaminated Post-Etched Dentin Substrate and Composite Resin. Healthcare (Basel) 2019; 7:healthcare7040128. [PMID: 31683858 PMCID: PMC6956069 DOI: 10.3390/healthcare7040128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 10/26/2019] [Accepted: 10/28/2019] [Indexed: 11/21/2022] Open
Abstract
Blood–saliva contamination negatively affects the bonding potential of adhesive agents. The study aimed to assess the effect of various cleaning protocols on micro-shear bond strength (μSBS) between blood–saliva-contaminated post-etched dentin and composite resin in total-etch and self-etch adhesives. The cleaning methods tested were water rinsing, 37.5% phosphoric acid (H3PO4) re-etching, 6% sodium hypochlorite (NaoCl), 2% chlorhexidine gluconate (CXG), isopropyl alcohol (IPA), and pumice. Nono-hybrid composite cylinders with a 3-mm diameter and 2-mm height were directly cured over the dentin substrate, stored for 24 h, and subjected to 12,000 thermocycles. The shear force was exerted with a 200-μm knife-edged chisel-shaped head from a universal testing machine. The type of failure was assessed with stereomicroscope magnified images. The obtained data were evaluated by Kruskal–Wallis and Mann–Whitney U post-hoc tests. Water-rinsed contaminated dentin surfaces showed substantially reduced μSBS in the total etch from 25.93 to 20.29 Mpa and the corresponding values for the one-step self-etch adhesive were 10.10 to 8.8. Re-etching with 37.5% H3Po4 resulted in a recovery of bonding potential in both total-etch (24.58 Mpa) and self-etch adhesive (9.23 Mpa). Alternately, NaoCl and pumice cleaning showed promising results for the total-etch (23.51 Mpa) and self-etch (7.79 Mpa).
Collapse
Affiliation(s)
- Satheesh B Haralur
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia.
| | - Salem Mohammed Alharthi
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia.
| | - Saeed Aied Abohasel
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia.
| | - Khalid Mohammed Alqahtani
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia.
| |
Collapse
|
27
|
Bafail A, Azizalrahman M, Vilde T, Kishen A, Prakki A. Alternative model for cathepsin K activation in human dentin. Dent Mater 2019; 35:1630-1636. [PMID: 31543377 DOI: 10.1016/j.dental.2019.08.104] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/15/2019] [Accepted: 08/22/2019] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To evaluate the protease activity in dentin matrices subjected to lactic acid (LA) in comparison to polyacrylic acid (PAA) challenge model at cathepsin K (CT-K) optimum pH 5.5 to assess effectiveness of inhibitors in dentin collagen degradation. METHODS Dentin disks measuring 0.5mm prepared from human molars were completely demineralized in 10% H3PO4. Demineralized dentin disks were challenged with 0.1M LA, 1.1mM PAA, artificial saliva (AS), or deionized water (C) for 24h or 7-days. Dentin collagen properties were tested by measurement of %dry mass change, and ultimate tensile strength (UTS). Degradation of dentin type I collagen was measured by telopeptide assays measuring the sub-product release of C-terminal cross-linked telopeptides (ICTP) and C-terminal peptide (CTX) in the incubation media in relation to total protein concentration, which correlates with matrix metalloproteinases (MMPs) and CT-K activities. RESULTS Gravimetric analysis showed statistically significant difference between C and other groups (p<0.04) at 24h. LA specimens showed significantly higher weight loss from 24h to 7-days (p=0.02). UTS revealed statistically significant difference between AS and LA at 24h and 7-days. UTS at 24h and 7-days for C and AS had significantly higher mean values compared to LA and PAA. Telopeptide assays reported that CTXtp results showed that LA at 24h had significantly higher mean values compared to C and AS. SIGNIFICANCE LA has the ability to activate endogenous CT-K in dentin as measured by the release of CTX (CT-K specific telopeptide). This LA based model has the potential application for further investigations on the activity and possible inhibitors of CT-K in human dentin.
Collapse
Affiliation(s)
- A Bafail
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada; Department of Restorative Dental Sciences, Faculty of Dentistry, Taibah University, Medina, Saudi Arabia
| | - M Azizalrahman
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - T Vilde
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - A Kishen
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - A Prakki
- Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada.
| |
Collapse
|
28
|
Guo JM, Makvandi P, Wei CC, Chen JH, Xu HK, Breschi L, Pashley DH, Huang C, Niu LN, Tay FR. Polymer conjugation optimizes EDTA as a calcium-chelating agent that exclusively removes extrafibrillar minerals from mineralized collagen. Acta Biomater 2019; 90:424-440. [PMID: 30953801 DOI: 10.1016/j.actbio.2019.04.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 03/29/2019] [Accepted: 04/02/2019] [Indexed: 01/22/2023]
Abstract
During development of mineralized collagenous tissues, intrafibrillar mineralization is achieved by preventing mineralization precursor inhibitors that are larger than 40 kDa from entering the collagen fibrils. Such a property is incorporated in the design of a calcium chelator for dentin bonding in the etch-and-rinse technique that selectively demineralizes extrafibrillar apatite while leaving the intrafibrillar minerals intact. This strategy prevents complete demineralization of collagen fibrils, avoids collapse of collagen that blocks resin infiltration after air-drying, and protects the completely demineralized fibrils from bacteria colonization and degradation by endogenous proteases after resin bonding. In the present study, a water-soluble glycol chitosan-EDTA (GCE) conditioner was synthesized by conjugation of EDTA, an effective calcium chelator, to high molecular weight glycol chitosan, which exhibits weak chelation property. The GCE conjugate was purified, characterized by FTIR, 1H NMR, isothermal titration calorimetry and ICP-AES, and subjected to size exclusion dialysis to recover molecules that are >40 kDa. The optimal concentration and application time for etching dentin were determined by bond strength testing to ensure that the dentin bonding results were comparable to phosphoric acid etching, and maintained equivalent bond strength after air-drying of the conditioned collagen matrix. Extrafibrillar demineralization was validated with transmission electron microscopy. Inhibition of endogenous dentin proteases was confirmed using in-situ zymography. The water-soluble GCE dentin conditioner was non-cytotoxic and possessed antibacterial activities against planktonic and single-species biofilms, supporting its ongoing development as a dentin conditioner with air-drying, anti-proteolytic and antibacterial properties to enhance the durability of bonds created using the etch-and-rinse bonding technique. STATEMENT OF SIGNIFICANCE: The current state-of-the-art techniques for filling decayed teeth with plastic tooth-colored materials require conditioning the mineralized, biofilm-covered, decayed dentin with acids or acid resin monomers to create a surface layer of completely- or partially-demineralized collagen matrix for the infiltration of adhesive resin monomers. Nevertheless, fillings prepared using these strategies are not as durable as consumers have anticipated. Conjugation of polymeric glycol chitosan with EDTA produces a new conditioner for dentin bonding that demineralizes only extrafibrillar dentin, reduces endogenous protease activities and kills biofilm bacteria. The high molecular weight glycol chitosan-EDTA is non-cytotoxic to the key regenerative players within the dentin-pulp complex. This advance permits dry bonding and the use of hydrophobic resins.
Collapse
|
29
|
Altinci P, Mutluay M, Tjäderhane L, Tezvergil-Mutluay A. Inhibition of dentin matrix-bound cysteine cathepsins by potassium fluoride. Eur J Oral Sci 2018; 127:1-9. [PMID: 30414282 DOI: 10.1111/eos.12581] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2018] [Indexed: 01/09/2023]
Abstract
Matrix metalloproteinases (MMPs) and cysteine cathepsins (CCs) can break down unprotected type I collagen fibrils in dentin matrix. This study investigated the use of potassium fluoride (KF) as a potential inhibitor of MMPs and CCs in dentin. Demineralized dentin beams were divided into groups (n = 10 in each group) and incubated in artificial saliva (AS, control), either alone or with one of seven concentrations of KF (6-238 mM fluoride) for 1, 7, and 21 d. After 21 d, all groups were further aged in AS for 6 months. Total MMP activity was screened using the colorimetric MMP assay. The activities of MMP-2 and MMP-9 were investigated using gelatin zymography. At the end of each incubation, changes in loss of dry mass and CC-mediated or total dissolution of collagen peptides were measured via precision weighing, C-terminal crosslinked telopeptide of type I collagen (CTX), and hydroxyproline (HYP) assays. The beams were examined using scanning electron microscopy. After 21 d, total MMP activities, dry mass loss, and CTX release for the groups exposed to 179 and 238 mM fluoride were significantly lower compared with the control group. After 6 months, all groups showed similar total MMP activity, dry mass loss, and HYP release, and CTX levels were significantly lower when the fluoride concentration was ≥24 mM. Calcium fluoride (CaF2 )-like precipitates were observed over the beams. In summary, KF significantly inhibited the catalytic activity of dentin matrix-bound CCs but did not seem to be effective for MMP-mediated activity.
Collapse
Affiliation(s)
- Pinar Altinci
- Finnish Doctoral Program in Oral Sciences, Turku, Finland.,Department of Restorative Dentistry and Cariology, Institute of Dentistry, University of Turku, Turku, Finland
| | - Murat Mutluay
- Department of Restorative Dentistry and Cariology, Institute of Dentistry, University of Turku, Turku, Finland.,Institute of Dentistry, University of Eastern Finland, Kuopio, Finland
| | - Leo Tjäderhane
- Department of Oral and Maxillofacial Diseases, University of Helsinki, and Helsinki University Hospital, Helsinki, Finland.,Research Unit of Oral Health Sciences and Medical Research Center Oulu (MRC Oulu), Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Arzu Tezvergil-Mutluay
- Department of Restorative Dentistry and Cariology, Institute of Dentistry, University of Turku, Turku, Finland.,Turku University Hospital, TYKS, University of Turku, Turku, Finland
| |
Collapse
|
30
|
Functionalized epigallocatechin gallate copolymer inhibit dentin matrices degradation: Mechanical, solubilized telopeptide and proteomic assays. Dent Mater 2018; 34:1625-1633. [DOI: 10.1016/j.dental.2018.08.297] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 07/06/2018] [Accepted: 08/27/2018] [Indexed: 01/02/2023]
|
31
|
Pedrosa VO, França FMG, Turssi CP, Amaral FLBD, Teixeira LN, Martinez EF, Basting RT. Effects of caffeic acid phenethyl ester application on dentin MMP-2, stability of bond strength and failure mode of total-etch and self-etch adhesive systems. Arch Oral Biol 2018; 94:16-26. [PMID: 29929070 DOI: 10.1016/j.archoralbio.2018.06.012] [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] [Received: 01/19/2018] [Revised: 06/09/2018] [Accepted: 06/10/2018] [Indexed: 10/14/2022]
Abstract
OBJECTIVE Investigate the long-term effect of dentin pretreatment with 0.05 or 0.1% caffeic acid phenethyl ester (CAPE) on (1) bond strength of resin composite to dentin by a three-step etch-and-rinse (Adper Scotchbond Multipurpose/ ASB) or a two-step self-etch adhesive system (Clearfil SE Bond/ CSE), (2) their fracture mode, (3) the micromorphological features of the hybrid layer formed; and (4) the level of MMP-2 in dentin (after application, using a correlative immunoexpression/quantification approach). DESIGN Composite resin blocks were fabricated on 48 third molars (n = 6), according to the type of adhesive and treatment (control, CAPE 0.05% and CAPE 0.1%). Slices were obtained for scanning electron microscopy (SEM) evaluation, and sticks were fabricated for microtensile tests (24 h and 1 year). Aliquots of dentin powder were distributed (n = 12) according to the treatment and the MMP-2 concentration was determined by ELISA. RESULTS Tukey test showed that ASB groups presented higher BS in 24 h than CSE groups. ASB presented a reduction in BS values after 1-year. ASB and CSE presented no significant differences in BS after 1-year. CAPE had no effect on BS for both adhesive systems. The predominant failure mode for the ASB groups were adhesive; when 0.1% CAPE was applied there was a predominance of mixed fractures. Regarding the CSE group, 0.05% CAPE led to more adhesive failures, and the 0.1% concentration resulted in a higher number of cohesive failures in dentin. Higher MMP-2 concentrations were detected for the groups that did not undergo demineralization treatment, and the lowest values for the ASB groups treated with CAPE. SEM analysis showed no influence of pretreatment with CAPE. CONCLUSIONS CAPE did not influence the BS of the adhesives tested, or the micromorphology of the hybrid layer, irrespective of concentration or storage time. CAPE affected the fracture pattern at 24 h, depending on the concentration and the adhesive system used. Immunoassay analysis showed that CAPE 0.1% reduced the MMP-2 concentration in the ASB adhesive without affecting bond strength to dentin.
Collapse
Affiliation(s)
- Vivianne Oliveira Pedrosa
- São Leopoldo Mandic Institute and Dental Research Center, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil.
| | - Fabiana Mantovani Gomes França
- São Leopoldo Mandic Institute and Dental Research Center, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil.
| | - Cecilia Pedroso Turssi
- São Leopoldo Mandic Institute and Dental Research Center, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil.
| | - Flávia Lucisano Botelho do Amaral
- São Leopoldo Mandic Institute and Dental Research Center, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil.
| | - Lucas Novaes Teixeira
- São Leopoldo Mandic Institute and Dental Research Center, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil.
| | - Elizabeth Ferreira Martinez
- São Leopoldo Mandic Institute and Dental Research Center, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil.
| | - Roberta Tarkany Basting
- São Leopoldo Mandic Institute and Dental Research Center, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil.
| |
Collapse
|
32
|
Ou Q, Hu Y, Yao S, Wang Y, Lin X. Effect of matrix metalloproteinase 8 inhibitor on resin–dentin bonds. Dent Mater 2018; 34:756-763. [DOI: 10.1016/j.dental.2018.01.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 01/26/2018] [Accepted: 01/31/2018] [Indexed: 02/08/2023]
|
33
|
Release of ICTP and CTX telopeptides from demineralized dentin matrices: Effect of time, mass and surface area. Dent Mater 2018; 34:452-459. [DOI: 10.1016/j.dental.2017.12.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 12/06/2017] [Accepted: 12/08/2017] [Indexed: 11/23/2022]
|
34
|
Ayres AP, Bonvent JJ, Mogilevych B, Soares LES, Martin AA, Ambrosano GM, Nascimento FD, Van Meerbeek B, Giannini M. Effect of non-thermal atmospheric plasma on the dentin-surface topography and composition and on the bond strength of a universal adhesive. Eur J Oral Sci 2017; 126:53-65. [DOI: 10.1111/eos.12388] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ana P. Ayres
- Department of Dental Materials; Piracicaba Dental School; State University of Campinas; Piracicaba Brazil
| | - Jean J. Bonvent
- Department of Center for Natural and Human Sciences; Federal University of ABC; Santo André Brazil
| | - Borys Mogilevych
- Laboratory of Biomedical Vibrational Spectroscopy (LEVB); Research and Development Institute (IP&D); Universidade do Vale do Paraíba; São José dos Campos Brazil
| | - Luis E. S. Soares
- Laboratory of Dentistry and Applied Materials (LDAM); Research and Development Institute (IP&D); Universidade do Vale do Paraíba; São José dos Campos Brazil
| | - Airton A. Martin
- Laboratory of Biomedical Vibrational Spectroscopy (LEVB); Research and Development Institute (IP&D); Universidade do Vale do Paraíba; São José dos Campos Brazil
| | - Glaucia M. Ambrosano
- Department of Statistics; Piracicaba Dental School; State University of Campinas; Piracicaba Brazil
| | - Fábio D. Nascimento
- Interdisciplinary Center for Biochemistry Investigation; University of Mogi das Cruzes; Mogi das Cruzes Brazil
| | - Bart Van Meerbeek
- Department of Oral Health Sciences; BIOMAT & University Hospitals Leuven, KU Leuven; Leuven Belgium
| | - Marcelo Giannini
- Department of Dental Materials; Piracicaba Dental School; State University of Campinas; Piracicaba Brazil
| |
Collapse
|
35
|
Effect of conditioning solutions containing ferric chloride on dentin bond strength and collagen degradation. Dent Mater 2017; 33:1093-1102. [DOI: 10.1016/j.dental.2017.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 07/07/2017] [Accepted: 07/08/2017] [Indexed: 11/18/2022]
|
36
|
Münchow EA, Bottino MC. Recent Advances in Adhesive Bonding - The Role of Biomolecules, Nanocompounds, and Bonding Strategies in Enhancing Resin Bonding to Dental Substrates. CURRENT ORAL HEALTH REPORTS 2017; 4:215-227. [PMID: 29177123 PMCID: PMC5697773 DOI: 10.1007/s40496-017-0146-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE OF REVIEW To present an overview on the main agents (i.e., biomolecules and nanocompounds) and/or strategies currently available to amplify or stabilize resin-dentin bonding. RECENT FINDINGS According to studies retrieved for full text reading (2014-2017), there are currently six major strategies available to overcome resin-dentin bond degradation: (i) use of collagen crosslinking agents, which may form stable covalent bonds with collagen fibrils, thus strengthening the hybrid layer; (ii) use of antioxidants, which may allow further polymerization reactions over time; (iii) use of protease inhibitors, which may inhibit or inactivate metalloproteinases; (iv) modification of the bonding procedure, which may be performed by using the ethanol wet-bonding technique or by applying an additional adhesive (hydrophobic) coating, thereby strengthening the hybrid layer; (v) laser treatment of the substrate prior to bonding, which may cause specific topographic changes in the surface of dental substrates, increasing bonding efficacy; and (vi) reinforcement of the resin matrix with inorganic fillers and/or remineralizing agents, which may positively enhance physico-mechanical properties of the hybrid layer. SUMMARY With the present review, we contributed to the better understanding of adhesion concepts and mechanisms of resin-dentin bond degradation, showing the current prospects available to solve that problematic. Also, adhesively-bonded restorations may be benefited by the use of some biomolecules, nanocompounds or alternative bonding strategies in order to minimize bond strength degradation.
Collapse
Affiliation(s)
- Eliseu A. Münchow
- Department of Dentistry, Health Science Institute, Federal University of Juiz de Fora, Governador Valadares, MG 35010, Brazil
| | - Marco C. Bottino
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, Indiana University School of Dentistry, Indianapolis, IN 46202, USA
| |
Collapse
|
37
|
Chenicheri S, R U, Ramachandran R, Thomas V, Wood A. Insight into Oral Biofilm: Primary, Secondary and Residual Caries and Phyto-Challenged Solutions. Open Dent J 2017; 11:312-333. [PMID: 28839480 PMCID: PMC5543615 DOI: 10.2174/1874210601711010312] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 02/15/2017] [Accepted: 03/28/2017] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION Dental caries is known to be one of the most widespread, chronic infections affecting all ages and populations worldwide. The plethora of oral microbial population paves way for various endogenous infections and plays a crucial role in polymicrobial interactions contributing to biofilm-mediated diseases like caries and periodontal diseases. METHODS Extensive literature survey was conducted using the scientific databases like PubMed, Google scholar, Science Direct, etc. using the key words like dental caries, orodental infections, dental microbes, dental biofilm, secondary caries, phytotherapy, etc. The literature was analyzed thoroughly and critical review was performed. RESULTS The risk of development of secondary caries and residual caries further results in treatment failure. Drug resistance developed by oral microbes and further side effects pose serious hurdles in the current therapeutic strategies. The hyperactivities of various MMPs and the resulting massive ECM degradation are the challenging part in the design of effective therapeutic approaches. Anticariogenic phytotherapy is well appreciated owing to lesser side effects and versatility of their action. But appreciable outcomes regarding the phytochemical bioavailability and bioretention are still challenging. Site-specific delivery of phytoagents at the infected site may enhance the efficiency of these drugs. Accordingly emerging phytodentistry can be promising for the management of secondary and residual caries. CONCLUSION This article presents major cariogens and their mechanisms in initiating and aggravating dental caries. Effectiveness of phytotherapy and different mode of action of phytochemicals against cariogens are outlined. The article also raises major concerns and possibilities of phytochemical based therapeutics to be applied in the clinical arena of caries management.
Collapse
Affiliation(s)
- Smitha Chenicheri
- Department of Microbiology, Karpagam University, Coimbatore, Tamil Nadu, India.,Microbiology Division, Biogenix Research Center for Molecular Biology and Applied Sciences, Thiruvananthapuram, Kerala, India.,Department of Microbiology, PMS Dental college and Research Center, Thiruvananthapuram, Kerala, India
| | - Usha R
- Department of Microbiology, Karpagam University, Coimbatore, Tamil Nadu, India
| | - Rajesh Ramachandran
- Microbiology Division, Biogenix Research Center for Molecular Biology and Applied Sciences, Thiruvananthapuram, Kerala, India
| | - Vinoy Thomas
- Department of Materials Science & Engineering, Center for Nanoscale Materials and Biointegration (CNMB), University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA
| | - Andrew Wood
- Department of Materials Science & Engineering, Center for Nanoscale Materials and Biointegration (CNMB), University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA
| |
Collapse
|
38
|
de Lima E, Santos R, Durão M, Nascimento A, Braz R. Universal cements: dual activated and chemically activated. ACTA BIOMATERIALIA ODONTOLOGICA SCANDINAVICA 2017. [PMID: 28642922 PMCID: PMC5433229 DOI: 10.1080/23337931.2016.1221314] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Objective: The aim of the present study was to assess the bond strength of universal cements cured either dually or chemically only. Methods: Three cements were assessed using different types of application: dual activated (DA) or chemically activated (CA). In total 80 dentin blocks were used, obtained through the enamel wear of the lingual and buccal surfaces of bovine incisors. Standard cone-shaped cavity preparations were created using diamond burs. Subsequently, indirect restoration blocks were designed with Filtek Z350 (3M ESPE) composite resin. The teeth were divided into two groups (DA and CA) and then subdivided into four subgroups (n = 10) prior to cementation with the respective products: Duo-Link (Bisco); RelyX Ultimate (3M ESPE); Nexus 3 (Kerr) and conventional RelyX ARC (3M ESPE) as the control. The cementation in the PA group was applied following the manufacturer’s instructions. The CA group was cemented in a darkroom to avoid exposure to light. They were stored in distilled water at 37 °C for 24 h and submitted to the push-out test. Data were analyzed by two-way ANOVA and Tukey’s post-hoc test (p < .05). Results: The greatest bond strength results were obtained for photoactivated universal cements. Conclusion: Chemical activation is not sufficient to ensure acceptable bond strength.
Collapse
Affiliation(s)
| | | | - Márcia Durão
- University of PernambucoCamaragibe, RecifeBrazil
| | | | - Rodivan Braz
- University of PernambucoCamaragibe, RecifeBrazil
| |
Collapse
|
39
|
Seseogullari-Dirihan R, Mutluay MM, Tjäderhane L, Breschi L, Pashley DH, Tezvergil-Mutluay A. Effect of pH on dentin protease inactivation by carbodiimide. Eur J Oral Sci 2017. [DOI: 10.1111/eos.12354] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Roda Seseogullari-Dirihan
- Department of Restorative Dentistry and Cariology; Institute of Dentistry; University of Turku; Turku Finland
- Adhesive Dentistry Research Group; Biomaterials and Medical Device Research Programme; Turku Finland
| | - Mustafa M. Mutluay
- Department of Restorative Dentistry and Cariology; Institute of Dentistry; University of Turku; Turku Finland
- Adhesive Dentistry Research Group; Biomaterials and Medical Device Research Programme; Turku Finland
- Turku University Hospital; TYKS; Turku Finland
| | - Leo Tjäderhane
- Department of Oral and Maxillofacial Diseases; University of Helsinki; Helsinki Finland
- Helsinki University Hospital; Helsinki Finland
- Research Unit of Oral Health Sciences; and Medical Research Center Oulu (MRC Oulu); Oulu University Hospital; University of Oulu; Oulu Finland
- Department of Cariology; Institute of Dentistry; University of Oulu; Oulu Finland
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences; University of Bologna; Bologna Italy
| | - David H. Pashley
- The Dental College of Georgia; Augusta University; Augusta GA USA
| | - Arzu Tezvergil-Mutluay
- Department of Restorative Dentistry and Cariology; Institute of Dentistry; University of Turku; Turku Finland
- Adhesive Dentistry Research Group; Biomaterials and Medical Device Research Programme; Turku Finland
- Turku University Hospital; TYKS; Turku Finland
| |
Collapse
|
40
|
Tezvergil-Mutluay A, Seseogullari-Dirihan R, Feitosa V, Cama G, Brauer D, Sauro S. Effects of Composites Containing Bioactive Glasses on Demineralized Dentin. J Dent Res 2017; 96:999-1005. [DOI: 10.1177/0022034517709464] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The aim of this study was to evaluate the degradation of completely demineralized dentin specimens in contact with a filler-free or 2 ion-releasing resins containing micrometer-sized particles of Bioglass 45S5 (BAG) or fluoride-containing phosphate-rich bioactive glass (BAG-F). Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were also used to evaluate the remineralization induced by the experimental ion-releasing resin-based materials. Dentin beams were totally demineralized in H3PO4 (10%) and placed in direct contact with a filler-free (RESIN) or 2 experimental ion-releasing resins (BAG or BAG-F) and immersed in artificial saliva (AS) up to 30 d. Further specimens were also processed and submitted to FTIR and SEM analysis to evaluate the remineralization induced by such ion-releasing resins before and after AS immersion. BAG and BAG-F alkalinized the incubation media. A significant decrease of the dry mass was observed between the specimens of all groups stored for 3 and 30 d in AS. However, the fluoride-containing phosphate-rich bioactive glass incorporated into a resin-based material (BAG-F) showed greater ability in reducing the solubilization of C-terminal cross-linked telopeptide (ICTP) and C-terminal telopeptide (CTX) after prolonged AS storage. Moreover, after 30 d of AS storage, BAG-F showed the greatest remineralizing effect on the stiffness of the completely demineralized dentin matrices. In conclusion, fluoride-containing phosphate-rich bioactive glass incorporated as micrometer-sized filler in dental composites may offer greater beneficial effects than Bioglass 45S5 in reducing the enzyme-mediated degradation and remineralization of demineralized dentin.
Collapse
Affiliation(s)
- A. Tezvergil-Mutluay
- Department of Restorative Dentistry and Cariology, Institute of Dentistry, University of Turku, Turku, Finland, and Turku University Hospital, TYKS, Turku, Finland
| | - R. Seseogullari-Dirihan
- Department of Restorative Dentistry and Cariology, Institute of Dentistry, University of Turku, Turku, Finland, and Turku University Hospital, TYKS, Turku, Finland
| | - V.P. Feitosa
- Research Division, Paulo Picanço School of Dentistry, Fortaleza, Brazil
| | - G. Cama
- Polymer Chemistry & Biomaterials Group, University of Ghent, Ghent, Belgium
| | - D.S. Brauer
- Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Jena, Germany
| | - S. Sauro
- Dental Biomaterials, Departamento de Odontología, Facultad de Ciencias de la Salud, University CEU-Cardenal Herrera, Valencia, Spain
- Biomaterials, Biophotonics and Tissue Engineering, King’s College London Dental Institute (KCLDI), London, UK
| |
Collapse
|
41
|
Effect of a novel quaternary ammonium silane on dentin protease activities. J Dent 2017; 58:19-27. [DOI: 10.1016/j.jdent.2017.01.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 12/30/2016] [Accepted: 01/03/2017] [Indexed: 12/13/2022] Open
|
42
|
Seseogullari-Dirihan R, Mutluay MM, Pashley DH, Tezvergil-Mutluay A. Is the inactivation of dentin proteases by crosslinkers reversible? Dent Mater 2017; 33:e62-e68. [DOI: 10.1016/j.dental.2016.09.036] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 09/22/2016] [Accepted: 09/27/2016] [Indexed: 01/01/2023]
|
43
|
Scaffa PMC, Breschi L, Mazzoni A, Vidal CDMP, Curci R, Apolonio F, Gobbi P, Pashley D, Tjäderhane L, Tersariol ILDS, Nascimento FD, Carrilho MR. Co-distribution of cysteine cathepsins and matrix metalloproteases in human dentin. Arch Oral Biol 2016; 74:101-107. [PMID: 27923176 DOI: 10.1016/j.archoralbio.2016.11.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 10/26/2016] [Accepted: 11/20/2016] [Indexed: 11/19/2022]
Abstract
It has been hypothesized that cysteine cathepsins (CTs) along with matrix metalloproteases (MMPs) may work in conjunction in the proteolysis of mature dentin matrix. The aim of this study was to verify simultaneously the distribution and presence of cathepsins B (CT-B) and K (CT-K) in partially demineralized dentin; and further to evaluate the activity of CTs and MMPs in the same tissue. The distribution of CT-B and CT-K in sound human dentin was assessed by immunohistochemistry. A double-immunolabeling technique was used to identify, at once, the occurrence of those enzymes in dentin. Activities of CTs and MMPs in dentin extracts were evaluated spectrofluorometrically. In addition, in situ gelatinolytic activity of dentin was assayed by zymography. The results revealed the distribution of CT-B and CT-K along the dentin organic matrix and also indicated co-occurrence of MMPs and CTs in that tissue. The enzyme kinetics studies showed proteolytic activity in dentin extracts for both classes of proteases. Furthermore, it was observed that, at least for sound human dentin matrices, the activity of MMPs seems to be predominant over the CTs one.
Collapse
Affiliation(s)
- Polliana Mendes Candia Scaffa
- Faculty of Dentistry at Piracicaba, University of Campinas, Piracicaba, 13414-903, Brazil; Department of Biological Science, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP, 17012-901, Brazil
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, 40126, Italy
| | - Annalisa Mazzoni
- Department of Medical Sciences, University of Trieste, Trieste, 34128, Italy
| | - Cristina de Mattos Pimenta Vidal
- Faculty of Dentistry at Piracicaba, University of Campinas, Piracicaba, 13414-903, Brazil; Department of Operative Dentistry, College of Dentistry, University of Iowa, 801 Newton Rd, Iowa City, IA,52246, USA
| | - Rosa Curci
- IGM-CNR, Unit of Bologna c/o IOR, Bologna, 40136, Italy
| | - Fabianni Apolonio
- Department of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, 60020-181, Brazil
| | - Pietro Gobbi
- Department of SteVA, University "Carlo Bo", Urbino, 61029, Italy
| | - David Pashley
- Emeritus Professor of Oral Biology, Dental College of Georgia, Georgia Health Sciences University, Augusta, Georgia, 30912, USA
| | - Leo Tjäderhane
- Institute of Dentistry, University of Oulu, and Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu FI-90014, Finland; Department of Oral and Maxillofacial Diseases, University of Helsinki, and Helsinki University Hospital, Helsinki FI-00014, Finland
| | - Ivarne Luis Dos Santos Tersariol
- Department of Biochemistry, Federal University of São Paulo, São Paulo, 04021-001, Brazil; Centro Interdisciplinar de Investigação Bioquímica, University of Mogi das Cruzes, Mogi das Cruzes, 08773-520, Brazil
| | - Fábio Dupart Nascimento
- Centro Interdisciplinar de Investigação Bioquímica, University of Mogi das Cruzes, Mogi das Cruzes, 08773-520, Brazil
| | - Marcela Rocha Carrilho
- Biomaterials in Dentistry Program, Anhanguera University São Paulo (UNIAN-SP), São Paulo, 05145-200, Brazil; Biotechnology and Innovation in Health Program, Anhanguera University São Paulo (UNIAN-SP), São Paulo, 05145-200, Brazil.
| |
Collapse
|
44
|
Phosphoric acid concentration affects dentinal MMPs activity. J Dent 2016; 53:30-7. [DOI: 10.1016/j.jdent.2016.06.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 06/07/2016] [Accepted: 06/16/2016] [Indexed: 11/24/2022] Open
|
45
|
Collagen degradation and preservation of MMP-8 activity in human dentine matrix after demineralization. Arch Oral Biol 2016; 68:66-72. [DOI: 10.1016/j.archoralbio.2016.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 03/21/2016] [Accepted: 04/10/2016] [Indexed: 11/20/2022]
|
46
|
Takahashi N, Nyvad B. Ecological Hypothesis of Dentin and Root Caries. Caries Res 2016; 50:422-31. [PMID: 27458979 DOI: 10.1159/000447309] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/31/2016] [Indexed: 11/19/2022] Open
Abstract
Recent advances regarding the caries process indicate that ecological phenomena induced by bacterial acid production tilt the de- and remineralization balance of the dental hard tissues towards demineralization through bacterial acid-induced adaptation and selection within the microbiota - from the dynamic stability stage to the aciduric stage via the acidogenic stage [Takahashi and Nyvad, 2008]. Dentin and root caries can also be partly explained by this hypothesis; however, the fact that these tissues contain a considerable amount of organic material suggests that protein degradation is involved in caries formation. In this review, we compiled relevant histological, biochemical, and microbiological information about dentin/root caries and refined the hypothesis by adding degradation of the organic matrix (the proteolytic stage) to the abovementioned stages. Bacterial acidification not only induces demineralization and exposure of the organic matrix in dentin/root surfaces but also activation of dentin-embedded and salivary matrix metalloproteinases and cathepsins. These phenomena initiate degradation of the demineralized organic matrix in dentin/root surfaces. While a bacterial involvement has never been confirmed in the initial degradation of organic material, the detection of proteolytic/amino acid-degrading bacteria and bacterial metabolites in dentin and root caries suggests a bacterial digestion and metabolism of partly degraded matrix. Moreover, bacterial metabolites might induce pulpitis as an inflammatory/immunomodulatory factor. Root and dentin surfaces are always at risk of becoming demineralized in the oral cavity, and exposed organic materials can be degraded by host-derived proteases contained in saliva and dentin itself. New approaches to the prevention and treatment of root/dentin caries are required.
Collapse
Affiliation(s)
- Nobuhiro Takahashi
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | | |
Collapse
|
47
|
Elkassas D, Arafa A. Assessment of post-contamination treatments affecting different bonding stages to dentin. Eur J Dent 2016; 10:327-332. [PMID: 27403048 PMCID: PMC4926583 DOI: 10.4103/1305-7456.184159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Objectives: To assess the effect of cleansing treatments following saliva and blood contamination at different bonding stages to dentin. Materials and Methods: Labial surfaces of 168 permanent maxillary central incisors were ground flat exposing superficial dentin. Specimens were divided into: uncontaminated control (A), contamination after etching (B), contamination after adhesive application (C), contamination after adhesive polymerization (D). Groups were further subdivided according to cleansing treatments into: rinsing (B1, C1, D1), re-etching (B2, D3), sodium hypochlorite application (B3), ethyl alcohol application (C2), acetone application (C3), rinsing and rebonding (D2), re-etching and rebonding (D4). Composite microcylinders were bonded to treated substrates and shear loaded micro-shear bond strength (μSBS) until failure and treated surfaces were examined with scanning electron microscope. Debonded surfaces were classified as adhesive, cohesive or mixed failure. The data were analyzed using one-way ANOVA and Tukey's post hoc test. Results: The μSBS values were ranked as follow; Group B: A > B3 > B2 > B1 > B, Group C: A > C3 > C2 > C1 > C, Group D: A > D4 > D1 = D2 ≥ D3. Debonded surfaces showed adhesive failure in Group B while cohesive failure in Groups C and D. Conclusions: Cleansing treatments differ according to bonding step; re-etching then rebonding suggested if etched substrate or polymerized adhesive were contaminated while acetone application decontaminated affected unpolymerized adhesive.
Collapse
Affiliation(s)
- Dina Elkassas
- Department of Operative Dentistry, Faculty of Oral and Dental Medicine, Misr International University, Cairo, Egypt
| | - Abla Arafa
- Department of Pediatric Dentistry and Dental Public Health, Faculty of Oral and Dental Medicine, Misr International University, Cairo, Egypt
| |
Collapse
|
48
|
Jee SE, Zhou J, Tan J, Breschi L, Tay FR, Grégoire G, Pashley DH, Jang SS. Investigation of ethanol infiltration into demineralized dentin collagen fibrils using molecular dynamics simulations. Acta Biomater 2016; 36:175-85. [PMID: 26969524 DOI: 10.1016/j.actbio.2016.03.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/18/2016] [Accepted: 03/07/2016] [Indexed: 10/22/2022]
Abstract
The purpose of this study is to investigate the interaction of neat ethanol with bound and non-bound water in completely demineralized dentin that is fully hydrated, using molecular dynamics (MD) simulation method. The key to creating ideal resin-dentin bonds is the removal of residual free water layers and its replacement by ethanol solvent in which resin monomers are soluble, using the ethanol wet-bonding technique. The test null hypotheses were that ethanol cannot remove any collagen-bound water, and that ethanol cannot infiltrate into the spacing between collagen triple helix due to narrow interlayer spacing. Collagen fibrillar structures of overlap and gap regions were constructed by aligning the collagen triple helix of infinite length in hexagonal packing. Three layers of the water molecules were specified as the layers of 0.15-0.22nm, 0.22-0.43nm and 0.43-0.63nm from collagen atoms by investigating the water distribution surrounding collagen molecules. Our simulation results show that ethanol molecules infiltrated into the intermolecular spacing in the gap region, which increased due to the lateral shrinkage of the collagen structures in contact with ethanol solution, while there was no ethanol infiltration observed in the overlap region. Infiltrated ethanol molecules in the gap region removed residual water molecules via modifying mostly the third water layer (50% decrease), which would be considered as a loosely-bound water layer. The first and second hydration layers, which would be considered as tightly bound water layers, were not removed by the ethanol molecules, thus maintaining the helical structures of the collagen molecules.
Collapse
|
49
|
Altinci P, Mutluay M, Seseogullari-Dirihan R, Pashley D, Tjäderhane L, Tezvergil-Mutluay A. NaF Inhibits Matrix-Bound Cathepsin-Mediated Dentin Matrix Degradation. Caries Res 2016; 50:124-32. [DOI: 10.1159/000444222] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 01/24/2016] [Indexed: 11/19/2022] Open
Abstract
Matrix metalloproteinases (MMPs) and cysteine cathepsins (CCs) degrade the collagen fibrils of demineralized dentin. Sodium fluoride (NaF) has previously been shown to inhibit recombinant MMP-2 and MMP-9. This study aimed to evaluate the efficacy of NaF on the inhibition of dentin-bound MMPs and CCs. Dentin beams were completely demineralized in 10% phosphoric acid. The baseline total MMP activity and dry masses were measured. Beams were assigned to test groups based on similar MMP activity and dry mass (n = 10/group), and incubated in artificial saliva (control) or artificial saliva with NaF containing 6-238 mM fluoride for 1, 7 and 21 days. The dry mass loss and MMP activities were reassessed at each time point. The proteolytic activity was screened by gelatin zymography. ICTP and CTX released to the incubation medium were analyzed as indices of MMP and cathepsin K activity, respectively. The beams were examined under scanning electron microscopy. All NaF doses reduced the dry mass loss after 21 days (p < 0.05). NaF inhibition of the total MMP activity ranged between 5 and 80%. In gelatin zymography, the bands of MMP-2 and MMP-9 became less prominent with increasing NaF levels. NaF did not decrease the released ICTP (p > 0.05). Less CTX release was detected with F ≥179 mM (p < 0.05). CaF2-like minerals were observed on the beams. High levels of NaF may slow the degradation of the dentin matrix due to the inhibition of cathepsin K. Fluoride does not seem effective in the direct inhibition of proteolysis by dentin matrix-bound MMPs.
Collapse
|
50
|
Use of crosslinkers to inactivate dentin MMPs. Dent Mater 2016; 32:423-32. [DOI: 10.1016/j.dental.2015.12.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 12/07/2015] [Accepted: 12/07/2015] [Indexed: 11/18/2022]
|