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Toledano M, Fernández-Romero E, Osorio E, Aguilera FS, Lynch CD, Osorio MT, Toledano R, Osorio R. Effect of the anti-Alzheimer drug GSK-3β antagonist on numerical modeling of the energy dissipation through the resin-dentin interface. Dent Mater 2024:S0109-5641(24)00271-9. [PMID: 39271304 DOI: 10.1016/j.dental.2024.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Revised: 09/10/2024] [Accepted: 09/10/2024] [Indexed: 09/15/2024]
Abstract
OBJECTIVES The aim of this study was to determine the viscoelastic performance and energy dissipation of conditioned dentin infiltrated with polymeric nanoparticles (NPs) doped with tideglusib (TDg) (TDg-NPs). METHODS Dentin conditioned surfaces were infiltrated with NPs and TDg-NPs. Bonded interfaces were created, stored for 24 h and submitted to mechanical and thermal challenging. Resin-dentin interfaces were evaluated through nano-DMA/complex-loss-storage moduli-tan delta assessment and atomic force microscopy (AFM) analysis. RESULTS Dentin infiltrated with NPs and load cycled attained the highest complex modulus at hybrid layer and bottom of hybrid layer. Intertubular dentin treated with undoped NPs showed higher complex modulus than peritubular dentin, after load cycling, provoking energy concentration and breakdown at the interface. After infiltrating with TDg-NPs, complex modulus was similar between peri-intertubular dentin and energy dissipated homogeneously. Tan delta at intertubular dentin was higher than at peritubular dentin, after using TDg-NPs and load cycling. This generated the widest bandwidth of the collagen fibrils and bridge-like mineral structures that, as sight of energy dissipation, fastened active dentin remodeling. TDg-NPs inducted scarce mineralization after thermo-cycling, but these bridging processes limited breakdown zones at the interface. SIGNIFICANCE TDg-based NPs are then proposed for effective dentin remineralization and tubular seal, from a viscoelastic approach.
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Affiliation(s)
- Manuel Toledano
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
| | - Enrique Fernández-Romero
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain; Medicina Clínica y Salud Pública PhD Programme, University of Granada, 18071 Granada, Spain
| | - Estrella Osorio
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain.
| | - Fátima S Aguilera
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
| | - Christopher D Lynch
- University Dental School & Hospital/Cork University Dental School & Hospital, Cork, Ireland
| | - María T Osorio
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
| | - Raquel Toledano
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
| | - Raquel Osorio
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
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Toledano M, Fernández-Romero E, Osorio MT, Osorio E, Aguilera FS, Toledano R, Osorio R. Investigation of the effect of Tideglusib on the hydroxyapatite formation, crystallinity and elasticity of conditioned resin-dentin interfaces. J Dent 2024; 150:105334. [PMID: 39218289 DOI: 10.1016/j.jdent.2024.105334] [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: 07/22/2024] [Revised: 08/28/2024] [Accepted: 08/29/2024] [Indexed: 09/04/2024] Open
Abstract
OBJECTIVES To investigate the effect of dentin infiltration with polymeric nanoparticles (NPs) doped with tideglusib (TDg) (TDg-NPs) on hydroxyapatite formation, crystallinity and elasticity of conditioned resin-dentin interfaces. METHODS Dentin conditioned surfaces were infiltrated with NPs or TDg-NPs. Bonded interfaces were created, stored for 24 h and submitted to mechanical and thermal challenging. Resin-dentin interfaces were evaluated through nanoindentation to determine the modulus of elasticity, X-ray diffraction and transmission electron microscopy through selected area diffraction and bright-filed imaging. RESULTS TDg-NPs provoked peaks narrowing after the diffraction-intensity analysis that corresponded with high crystallinity, with an increased modulus of Young after load cycling in comparison with the samples treated with undoped NPs. New minerals, in the group of TDg-NPs, showed the greatest both deviation of line profile from perfect crystal diffraction and dimension of the lattice strain, i.e., crystallite, grain size and microstrain and 002 plane-texture. The new minerals generated after TDg-NPs application and mechanical loading followed a well defined lineation. Undoped NPs mostly produced small hydroxyapatite crystallites, non crystalline or amorphous in nature with poor maturity. CONCLUSIONS Tideglusib promoted the precipitation of hydroxyapatite, as a major crystalline phase, at the intrafibrillar compartment of the collagen fibrils, enabling functional mineralization. TDg-NPs facilitated nucleation of crystals randomly oriented, showing less structural variation in angles and distances that improved crystallographic relative order of atoms and maturity. Nanocrystals inducted by TDg-NPs were hexagonal prisms of submicron size. Thermal challenging of dentin treated with TDg-NPs have provoked a decrease of functional mineralization and crystallinity, associated to immature hydroxyapatite. CLINICAL SIGNIFICANCE New polycrystalline lattice formation generated after TDg-NPs infiltration may become correlated with high mechanical performance. This association can be inferred from the superior crystallinity that was obtained in presence of tideglusib. Immature crystallites formed in dentin treated with undoped NPs will account for a high remineralizing activity.
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Affiliation(s)
- Manuel Toledano
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, Granada 18071, Spain
| | - Enrique Fernández-Romero
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, Granada 18071, Spain; Medicina Clínica y Salud Pública PhD Programme, University of Granada, Granada 18071, Spain
| | - María T Osorio
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, Granada 18071, Spain
| | - Estrella Osorio
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, Granada 18071, Spain
| | - Fátima S Aguilera
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, Granada 18071, Spain.
| | - Raquel Toledano
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, Granada 18071, Spain
| | - Raquel Osorio
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, Granada 18071, Spain
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Yoo H, Gao F, Agostini-Walesch G, Alabsy M, Mitchell JC, Carrilho MR. Use of marine occurrent extracts to enhance the stability of dentin extracellular matrix. J Mech Behav Biomed Mater 2024; 154:106498. [PMID: 38581962 DOI: 10.1016/j.jmbbm.2024.106498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/22/2024] [Accepted: 03/06/2024] [Indexed: 04/08/2024]
Abstract
Chitosan (CS) and phloroglucinol (PhG), two extracts abundantly found in marine life, were investigated for their ability to biomodify demineralized dentin by enhancing collagen crosslinks and improving dentin extracellular matrix (ECM) mechanical and biochemical stability. Dentin obtained from non-carious extracted human molars were demineralized with phosphoric acid. Baseline Fourier-transform infrared (FTIR) spectra, apparent flexural elastic modulus (AE) and dry mass (DM) of each specimen were independently acquired. Specimens were randomly incubated for 5 min into either ultrapure water (no-treatment), 1% glutaraldehyde (GA), 1% CS or 1% PhG. Water and GA were used, respectively, as a negative and positive control for collagen crosslinks. Specimens' post-treatment FTIR spectra, AE, and DM were obtained and compared with correspondent baseline measurements. Additionally, the host-derived proteolytic activity of dentin ECM was assessed using hydroxyproline assay (HYP) and spectrofluorometric analysis of a fluorescent-quenched substrate specific for matrix metalloproteinases (MMPs). Finally, the bond strength of an etch-and-rinse adhesive was evaluated after application of marine compounds as non-rinsing dentin primers. Dentin specimens FTIR spectral profile changed remarkably, and their AE increased significantly after treatment with marine compounds. DM variation, HYP assay and fluorogenic substrate analysis concurrently indicated the biodegradation of CS- and PhG-treated specimens was significantly lesser in comparison with untreated specimens. CS and PhG treatments enhanced biomechanical/biochemical stability of demineralized dentin. These novel results show that PhG is a primer with the capacity to biomodify demineralized dentin, hence rendering it less susceptible to biodegradation by host-proteases.
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Affiliation(s)
- Hyemin Yoo
- College of Dental Medicine - Illinois, Midwestern University, Downers Grove, IL, USA
| | - Feng Gao
- College of Dental Medicine - Illinois, Midwestern University, Downers Grove, IL, USA
| | | | - Melisa Alabsy
- College of Dental Medicine - Illinois, Midwestern University, Downers Grove, IL, USA
| | - John C Mitchell
- College of Dental Medicine - Arizona, Midwestern University, Glendale, AZ, USA
| | - Marcela R Carrilho
- College of Dental Medicine - Illinois, Midwestern University, Downers Grove, IL, USA.
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Abu-Nawareg MM, Abouelseoud HK, Zidan AZ. Effect of Salvadora persica on resin-dentin bond stability. BMC Oral Health 2024; 24:505. [PMID: 38684974 PMCID: PMC11057114 DOI: 10.1186/s12903-024-04244-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 04/10/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND The stability of resin-dentin interfaces is still highly questionable. The aim of this study was to evaluate the effect of Salvadora persica on resin-dentin bond durability. MATERIALS AND METHODS Extracted human third molars were used to provide mid-coronal dentin, which was treated with 20% Salvadora persica extract for 1 min after acid-etching. Microtensile bond strength and interfacial nanoleakage were evaluated after 24 h and 6 months. A three-point flexure test was used to measure the stiffness of completely demineralized dentin sticks before and after treatment with Salvadora persica extract. The hydroxyproline release test was also used to measure collagen degradation by endogenous dentin proteases. Statistical analysis was performed using two-way ANOVA followed by post hoc Bonferroni test and unpaired t-test. P-values < 0.05 were considered statistically significant. RESULTS The use of Salvadora persica as an additional primer with etch-and-rinse adhesive did not affect the immediate bond strengths and nanoleakage (p > 0.05). After 6 months, the bond strength of the control group decreased (p = 0.007), and nanoleakage increased (p = 0.006), while Salvadora persica group showed no significant difference in bond strength and nanoleakage compared to their 24 h groups (p > 0.05). Salvadora persica increased dentin stiffness and decreased collagen degradation (p < 0.001) compared to their controls. CONCLUSION Salvadora persica extract pretreatment of acid-etched dentin preserved resin-dentin bonded interface for 6 months. CLINICAL SIGNIFICANCE Durability of resin-dentin bonded interfaces is still highly questionable. Endogenous dentinal matrix metalloproteinases play an important role in degradation of dentinal collagen within such interfaces. Salvadora persica may preserve resin-dentin interfaces for longer periods of time contributing to greater clinical success and longevity of resin composite restorations.
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Affiliation(s)
- Manar M Abu-Nawareg
- Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah, 21589, Saudi Arabia.
- Biomaterials Department, Faculty of Dentistry, Cairo University, Cairo, Egypt.
| | - Hanan K Abouelseoud
- Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah, 21589, Saudi Arabia
- Operative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Ahmed Z Zidan
- Restorative Dentistry Department, Faculty of Dentistry, Umm Al-Qura University, Mekkah, Saudi Arabia
- Biomaterials Department, Faculty of Dentistry, October University for Modern Sciences and Arts (MSA), Cairo, Egypt
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Kijsamanmith K, Srisatayasatien P, Thanindratarn N, Vichainarong C, Panyasukum J. The effect of 2% chlorhexidine iontophoresis on dentin sealing ability of etch-and-rinse adhesive: An in vitro study. J Dent Sci 2024; 19:846-854. [PMID: 38618063 PMCID: PMC11010672 DOI: 10.1016/j.jds.2023.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 09/01/2023] [Indexed: 04/16/2024] Open
Abstract
Background/purpose Iontophoresis could enhance the delivery of chlorhexidine into oral tissue. This study aimed to determine the effect of 2% chlorhexidine iontophoresis (CHI) on the sealing ability of etch-and-rinse adhesive in human dentin using hydraulic conductance (HD) measurement, scanning electron microscopy and energy dispersive x-ray spectroscopy (SEM-EDS). Materials and methods Thirty-nine sound dentin specimens were prepared from 39 extracted intact third molars. Thirty specimens were used for HD measurement and randomly divided into 3 equal-sized groups; (1) No chlorhexidine treatment (control), (2) passive chlorhexidine treatment (CHT) and (3) CHI on acid-etched dentin. Each dentin surface was treated with etch-and-rinse adhesive. HD of each specimen was measured before treatment, after immediate bonding and after 14 days. The other 9 specimens were subjected to SEM-EDS analysis of the acid-etched dentin and the dentin treated with CHT and CHI. ANOVA test and Student-Newman-Keuls method were used for statistical analysis. Results After bonding, there was no significant difference in percentage decrease of HD among the treatment groups (P > 0.05). After 14 days, CHI and CHT groups had greater percentage decrease of HD than the control (P < 0.001 and P = 0.009, respectively). Under SEM-EDS analysis, acid-etched dentin with CHI presented opened dentinal tubule orifices and more chlorhexidine precipitates on dentin than the dentin with CHT, which strongly related to a higher percentage of chloride ions on the CHI dentin surface (P < 0.001). Conclusion The use of CHI on acid-etched dentin had a positive effect on dentin sealing ability of etch-and-rinse adhesive.
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Affiliation(s)
- Kanittha Kijsamanmith
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | | | - Nichapa Thanindratarn
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Chanisa Vichainarong
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Jirapat Panyasukum
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
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Toledano M, Aguilera FS, Fernández-Romero E, Lagos AJ, Bonilla M, Lynch CD, Osorio R. Dentin remineralization using a stimuli-responsive engineered small molecule GSK3 antagonists-functionalized adhesive. Dent Mater 2024; 40:393-406. [PMID: 38114343 DOI: 10.1016/j.dental.2023.12.010] [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: 08/05/2023] [Revised: 11/06/2023] [Accepted: 12/11/2023] [Indexed: 12/21/2023]
Abstract
OBJECTIVES Tideglusib has shown great performance in terms of dentin regenerative properties. This study aims to evaluate bonding ability, of demineralized dentin infiltrated with polymeric nanoparticles (NPs) doped with tideglusib (TG) (TG-NPs). METHODS Dentin conditioned surfaces were infiltrated with NPs and TG-NPs. Bonded interfaces were created and stored for 24 h and then submitted to mechanical, chemical and thermal challenging. The resin-dentin interface was evaluated through a doubled dye fluorescent technique and a calcium chelator fluorophore under a confocal laser scanning microscopy, and by field emission scanning electron microscopy. RESULTS Dentin surfaces treated with TG-NPs and load cycled produced higher bond strength than the rest of the groups. Immersion of dentin specimens treated with undoped-NPs in collagenase solution attained the lowest microtensile bond strength (MTBS) values. Both porosity and nanoleakage decreased when dentin was infiltrated with TG-NPs, that revealed strong signals of xylenol orange stain at both hybrid layer and dentinal tubules. The presence of NPs, in general, inducted the presence of mineralized interfaces after mechanical loading and thermocycling. CONCLUSIONS Nanoparticles doped with tideglusib promoted the highest dentin bonding efficacy among groups, as they facilitated the maximum bond strength values with creation of mineral deposits at the hybrid layer and dentinal walls. Tideglusib enabled scarce porosity, nanoleakage and advanced sealing among dentin groups. SIGNIFICANCE Doping hydrophilic polymeric NPs with tideglusib, infiltrated in etched dentin represents a reproducible technique to create reparative dentin at the resin-dentin interface, by inducing therapeutic bioactivity.
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Affiliation(s)
- Manuel Toledano
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
| | - Fátima S Aguilera
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain.
| | - Enrique Fernández-Romero
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
| | - Alejandro Js Lagos
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
| | - Marco Bonilla
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
| | - Christopher D Lynch
- University Dental School & Hospital/Cork University Dental School & Hospital, Cork, Ireland
| | - Raquel Osorio
- University of Granada, Faculty of Dentistry, Colegio Máximo de Cartuja s/n, 18071 Granada, Spain
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Karatas E, Hadis M, Palin WM, Milward MR, Kuehne SA, Camilleri J. Minimally invasive management of vital teeth requiring root canal therapy. Sci Rep 2023; 13:20389. [PMID: 37990070 PMCID: PMC10663499 DOI: 10.1038/s41598-023-47682-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 11/16/2023] [Indexed: 11/23/2023] Open
Abstract
The present study aimed to investigate the possible use of a non-instrumentation technique including blue light irradiation for root canal cleaning. Extracted human single rooted teeth were selected. Nine different groups included distilled water, NaOCl, intra-canal heated NaOCl, and NaOCl + EDTA irrigation after either instrumentation or non-instrumentation, and a laser application group following non-instrumentation technique. The chemical assessment of the root canal dentine was evaluated using energy dispersive spectroscopy (EDS) and Fourier transform infrared (FT-IR) spectroscopy. Surface microstructural analyses were performed by using scanning electron microscopy (SEM). The antimicrobial efficacy of different preparation techniques was evaluated using microbial tests. Light application didn't change the calcium/phosphorus, carbonate/phosphate and amide I/phosphate ratios of the root canal dentin. The root canal dentin preserved its original chemistry and microstructure after light application. The instrumentation decreased the carbonate/phosphate and amide I/phosphate ratios of the root canal dentin regardless of the irrigation solution or technique (p < 0.05). The application of light could not provide antibacterial efficacy to match the NaOCl irrigation. The NaOCl irrigation both in the non-instrumentation and instrumentation groups significantly reduced the number of bacteria (p < 0.05). The use of minimally invasive root canal preparation techniques where the root canal is not instrumented and is disinfected by light followed by obturation with a hydraulic cement sealer reduced the microbial load and preserved the dentin thus may be an attractive treatment option for management of vital teeth needing root canal therapy.
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Affiliation(s)
- E Karatas
- Ataturk University, Erzurum, Turkey
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, 5, Mill Pool Way Edgbaston, Birmingham, B5 7EG, UK
| | - M Hadis
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, 5, Mill Pool Way Edgbaston, Birmingham, B5 7EG, UK
| | - W M Palin
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, 5, Mill Pool Way Edgbaston, Birmingham, B5 7EG, UK
| | - M R Milward
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, 5, Mill Pool Way Edgbaston, Birmingham, B5 7EG, UK
| | - S A Kuehne
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, 5, Mill Pool Way Edgbaston, Birmingham, B5 7EG, UK
- School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - J Camilleri
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, 5, Mill Pool Way Edgbaston, Birmingham, B5 7EG, UK.
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Pascale C, Geaman J, Mendoza C, Gao F, Kaminski A, Cuevas-Nunez M, Darvishan B, Mitchell JC, Carrilho MR, Sigar I. In vitro assessment of antimicrobial potential of low molecular weight chitosan and its ability to mechanically reinforce and control endogenous proteolytic activity of dentine. Int Endod J 2023; 56:1337-1349. [PMID: 37584496 DOI: 10.1111/iej.13962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/25/2023] [Accepted: 07/28/2023] [Indexed: 08/17/2023]
Abstract
AIMS Chitosan-based biomaterials exhibit several properties of biological interest for endodontic treatment. Herein, a low molecular weight chitosan (CH) solution was tested for its antimicrobial activity against Enterococcus faecalis (E. faecalis) and effects on dentine structure. METHODOLOGY The root canal of 27 extracted uniradicular teeth were biomechanically prepared, inoculated with a suspension of E. faecalis and randomly assigned to be irrigated with either 5.25% sodium hypochlorite (NaClO), 0.2% CH or sterile ultrapure water (W). Bacteriologic samples were collected from root canals and quantified for of E. faecalis colony-forming units (CFUs). The effectiveness of CH over E. faecalis biofilms was further measured using the MBEC Assay®. Additionally, dentine beams and dentine powder were obtained, respectively, from crowns and roots of 20 extracted third molars. Dentine samples were treated or not with 17% EDTA and immersed in either CH or W for 1 min. The effects of CH on dentine structure were evaluated by assessment of the modulus of elasticity, endogenous proteolytic activity and biochemical modifications. RESULTS The number of E. faecalis CFUs was significantly lower for samples irrigated with CH and NaClO. No significant differences were found between CH and NaClO treatments. Higher modulus of elasticity and lower proteolytic activity were reported for dentine CH-treated specimens. Chemical interaction between CH and dentine was observed for samples treated or not with EDTA. CONCLUSIONS Present findings suggest that CH could be used as an irrigant during root canal treatment with the triple benefit of reducing bacterial activity, mechanically reinforcing dentine and inhibiting dentine proteolytic activity.
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Affiliation(s)
- Christina Pascale
- College of Dental Medicine Illinois, Midwestern University, Downers Grove, Illinois, USA
| | - Jay Geaman
- College of Dental Medicine Illinois, Midwestern University, Downers Grove, Illinois, USA
| | - Christine Mendoza
- College of Dental Medicine Illinois, Midwestern University, Downers Grove, Illinois, USA
| | - Feng Gao
- College of Dental Medicine Illinois, Midwestern University, Downers Grove, Illinois, USA
| | - Amber Kaminski
- College of Graduate Studies, Midwestern University, Downers Grove, Illinois, USA
| | - Maria Cuevas-Nunez
- College of Dental Medicine Illinois, Midwestern University, Downers Grove, Illinois, USA
| | - Behnam Darvishan
- College of Dental Medicine Illinois, Midwestern University, Downers Grove, Illinois, USA
| | - John C Mitchell
- College of Dental Medicine Illinois, Midwestern University, Downers Grove, Illinois, USA
- College of Dental Medicine Arizona, Midwestern University, Downers Grove, Illinois, USA
| | - Marcela R Carrilho
- College of Dental Medicine Illinois, Midwestern University, Downers Grove, Illinois, USA
| | - Ira Sigar
- College of Graduate Studies, Midwestern University, Downers Grove, Illinois, USA
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Telles CCDC, Basting RT, Bridi EC, França FMG, do Amaral FLB, Basting RT. Wet-bonding technique with ethanol may reduce protease activity in dentin-resin interface following application of universal adhesive system. J Clin Exp Dent 2023; 15:e403-e410. [PMID: 37214755 PMCID: PMC10198689 DOI: 10.4317/jced.60307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/27/2023] [Indexed: 05/24/2023] Open
Abstract
Background Greater degradation of the hybrid layer is expected when a universal adhesive system is used, especially in the conventional application strategy. Therefore, it would important to evaluate the effect of the ethanol (ETH) and a potential matrix protease inhibitor (caffeic acid phenethyl ester/ CAPE) to maximize the ability to achieve stable dentin bond strength. The aim of this study was to evaluated the effect of ETH on a wet-bonding technique, and dentin pretreatments with different concentrations of CAPE in ethanolic solution, followed by application of a universal adhesive system (Single Bond Universal) to inhibit proteolytic activity. Material and Methods Dentin blocks were allocated to eight experimental groups according to the strategy (total-etch our self-etch) and treatments: ETH, or dentin pretreatment with CAPE (at 0.5%, 2.5%; and 5.0%). Half of each block (each hemiblock) served as the control (without dentin pretreatments) for the same group. The bonding strategy was performed (adhesive system/ restoration with composite resin). Two slices were obtained from each hemiblock and evaluated using in situ zymography. The proteolytic activity was analyzed by quantifying the green photons of the images obtained under a fluorescence microscope in three dentin locations close to the dentin-resin interface: hybrid layer (HL), underlying dentin (UD) and deep dentin (DD). Results Wilcoxon tests (for comparison between experimental and control groups) and Friedman and Nemenyi tests (for comparisons between interface locations) showed that there was no difference between the groups with different CAPE concentrations and the respective control groups (p>0.05). ETH reduced the proteolytic activity at the HL and UD (p<0.05). Conclusions The wet-bonding technique with ETH proved effective in reducing the proteolytic activity. The use of CAPE in different concentrations solubilized in ethanol did not have a favorable effect on proteolytic inhibition. Key words:Adhesives, Hybrid layer, Dentin, Metalloproteinases.
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Darzé FM, Bridi EC, França F, Amaral FD, Turssi CP, Basting RT. Enamel and Dentin Etching with Glycolic, Ferulic, and Phosphoric Acids: Demineralization Pattern, Surface Microhardness, and Bond Strength Stability. Oper Dent 2023; 48:E35-E47. [PMID: 36656318 DOI: 10.2341/21-143-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2022] [Indexed: 01/20/2023]
Abstract
This study evaluated the etching pattern, surface microhardness, and bond strength for enamel and dentin submitted to treatment with phosphoric, glycolic, and ferulic acids. Enamel and dentin blocks were treated with phosphoric, glycolic, and ferulic acid to evaluate the surface and adhesive interface by scanning electron microscopy (2000×). Surface microhardness (Knoop) was evaluated before and after etching, and microtensile bond strength was evaluated after application of a two-step adhesive system (Adper Single Bond 2, 3M ESPE) at 24 hours and 12 months storage time points. Analysis of variance (ANOVA) and Tukey's test showed a decrease in the microhardness values for both substrates after application of each acid (p<0.0001). The reduction percentage was significantly higher for enamel treated with phosphoric acid (59.9%) and glycolic acid (65.1%) than for ferulic acid (16.5%) (p<0.0001), and higher for dentin that received phosphoric acid (38.3%) versus glycolic acid (27.8%) and ferulic acid (21.9%) (p<0.0001). Phosphoric and glycolic acids led to homogeneous enamel demineralization, and promoted the opening of dentinal tubules, whereas ferulic acid led to enamel surface demineralization and partially removed the smear layer. The adhesive-enamel interface showed micromechanical embedding of the adhesive in the interprismatic spaces when phosphoric and glycolic acids were applied. Ferulic acid showed no tag formation. Microtensile bond strength at both time points, and for both substrates, was lower with ferulic acid (p=0.0003/E; p=0.0011/D; Kruskal Wallis and Dunn). The bond strength for enamel and dentin decreased when using phosphoric and glycolic acids at the 12-month time evaluation (p<0.05). Glycolic acid showed an etching pattern and microhardness similar to that of phosphoric acid. Ferulic acid was not effective in etching the enamel or dentin, and it did not provide satisfactory bond strength to dental substrates.
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Affiliation(s)
- F M Darzé
- Fernanda Medeiros Darzé, DDS, MSc, PhD student, Faculdade São Leopoldo Mandic, Campinas, Brazil
| | - E C Bridi
- Enrico Coser Bridi, DDS, MSc, PhD, professor, Instituto Nacional de Ensino Superior e Pós-Graduação Padre Gervásio, Minas Gerais, Brazil
| | - Fmg França
- Fabiana Mantovani Gomes França, DDS, MSc, PhD, professor, Faculdade São Leopoldo Mandic, Campinas, Brazil
| | - Flb do Amaral
- Flávia Lucisano Botelho do Amaral, DDS, MSc, PhD, professor, Faculdade São Leopoldo Mandic, Campinas, Brazil
| | - C P Turssi
- Cecilia Pedroso Turssi, DDS, MSc, PhD, professor, Faculdade São Leopoldo Mandic, Campinas, Brazil
| | - R T Basting
- *Roberta Tarkany Basting, DDS, MSc, PhD, professor, Faculdade São Leopoldo Mandic, Campinas, Brazil
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11
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Anderson LA. Biomolecular histology as a novel proxy for ancient DNA and protein sequence preservation. Ecol Evol 2022; 12:e9518. [PMID: 36518622 PMCID: PMC9743065 DOI: 10.1002/ece3.9518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 10/03/2022] [Accepted: 10/17/2022] [Indexed: 12/14/2022] Open
Abstract
Researchers' ability to accurately screen fossil and subfossil specimens for preservation of DNA and protein sequences remains limited. Thermal exposure and geologic age are usable proxies for sequence preservation on a broad scale but are of nominal use for specimens of similar depositional environments. Cell and tissue biomolecular histology is thus proposed as a novel proxy for determining sequence preservation potential of ancient specimens with improved accuracy. Biomolecular histology as a proxy is hypothesized to elucidate why fossils/subfossils of some depositional environments preserve sequences while others do not and to facilitate selection of ancient specimens for use in molecular studies.
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Affiliation(s)
- Landon A Anderson
- Department of Biology North Carolina State University Raleigh North Carolina USA
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12
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Dentin Biomodification with Flavonoids and Calcium Phosphate Ion Clusters to Improve Dentin Bonding Stability. MATERIALS 2022; 15:ma15041494. [PMID: 35208035 PMCID: PMC8879567 DOI: 10.3390/ma15041494] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023]
Abstract
The purpose of this study was to evaluate the effects of flavonoids and calcium phosphate ion clusters (CPIC) on dentin bonding stability. Seven experimental solutions were synthesized using icaritin (ICT), fisetin (FIS), silibinin (SIB), CPIC, and combinations of one of three flavonoids and CPIC (ICT + C, FIS + C, SIB + C). The experimental solutions were applied to demineralized dentin prior to the application of a universal adhesive. A group without any experimental solution served as a control. Dentin specimens pretreated with the experimental solutions were assayed using Fourier transform infrared (FTIR) spectroscopy. The microtensile bond strength (µTBS) and nanoleakage were evaluated at 24 h and after 10,000 thermocycles. FIS and ICT + C showed significantly higher µTBS than the control group at 24 h. CPIC, ICT + C, FIS + C, and SIB + C showed significantly higher µTBS than the control group after thermocycling. After thermocycling, silver infiltration into the hybrid layer and interfacial gaps was more noticeable in the control group than in the other groups. The FTIR spectra revealed the formation of apatitic minerals in the demineralized dentin in the flavonoid and CPIC combination groups. The pretreatment of demineralized dentin with flavonoids and CPIC improved dentin bonding stability. The flavonoid and CPIC combinations preserved dentin bond strength.
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Toledano M, Toledano-Osorio M, Hannig M, Carrasco-Carmona Á, Osorio MT, García-Godoy F, Cabello I, Osorio R. Zn-containing Adhesives Facilitate Collagen Protection and Remineralization at the Resin-Dentin Interface: A Narrative Review. Polymers (Basel) 2022; 14:polym14030642. [PMID: 35160631 PMCID: PMC8840460 DOI: 10.3390/polym14030642] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 12/29/2022] Open
Abstract
This is a narrative review of the literature assessing the potential effectiveness of doping dentin polymeric adhesives with zinc compounds in order to improve bonding efficacy, remineralization and protection against degradation. A literature search was conducted using electronic databases, such as PubMed, MEDLINE, DIMDI and Web of Science. Through our search, we found literature demonstrating that Zn-doped dentin adhesives promote protection and remineralization of the resin-dentin interfaces. The increased bioactivity has also facilitated dentinal tubules' occlusion by crystals' precipitation contributing to improved sealing efficacy of restorations. Loading dentin adhesives with zinc gives rise to an increase of both crystallinity of mineral and crosslinking of collagen. The main role of zinc, in dentin adhesives, is to inhibit collagen proteolysis. We concluded that zinc exerts a protective effect through binding at the collagen-sensitive cleavage sites of matrix-metalloproteinases (MMPs), contributing to dentin matrix stabilization. Zinc may not only act as a MMPs inhibitor, but also influence signaling pathways and stimulate metabolic effects in dentin mineralization and remineralization processes. Zn-doped adhesives increase the longevity of dentin bonding through MMPs inhibition. Zn poses a remineralization strategy in demineralized dentin.
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Affiliation(s)
- Manuel Toledano
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18017 Granada, Spain; (M.T.); (Á.C.-C.); (R.O.)
| | - Manuel Toledano-Osorio
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18017 Granada, Spain; (M.T.); (Á.C.-C.); (R.O.)
- Correspondence: ; Tel.: +34-958-243-789
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University Hospital, Saarland University, Building 73, 66421 Homburg/Saar, Germany;
| | - Álvaro Carrasco-Carmona
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18017 Granada, Spain; (M.T.); (Á.C.-C.); (R.O.)
| | | | - Franklin García-Godoy
- Health Science Center, College of Dentistry, University of Tennessee, 875 Union Avenue, Memphis, TN 381632110, USA;
| | - Inmaculada Cabello
- Integral Pediatric Dentistry Teaching Unit, Faculty of Medicine, University of Murcia, 30008 Murcia, Spain;
- Murcian Institute of Biosanitary Research (IMIB), 30120 Murcia, Spain
| | - Raquel Osorio
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18017 Granada, Spain; (M.T.); (Á.C.-C.); (R.O.)
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Ebrahimi M, Majidinia S, Sarraf A. Effect of Chlorhexidine on Immediate and Delayed Bond Strength between Resin and Dentin of Primary Teeth: A Systematic Review and Meta-Analysis. Front Dent 2022; 19:39. [PMID: 36873616 PMCID: PMC9976634 DOI: 10.18502/fid.v19i39.11749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 11/15/2022] [Indexed: 01/26/2023] Open
Abstract
Objectives: The purpose of this study was to systematically review the literature and use meta-analysis to investigate whether chlorhexidine (CHX) application after acid etching as an adjunct treatment has any influence on the immediate and delayed bond strength to primary dentin. Materials and Methods: In this review, PubMed, ISI (all data bases), Scopus and Cochrane were searched according to the selected keywords up to April 30, 2018. The full texts of all published articles that met our primary inclusion criteria were obtained. The studies were analyzed in two parts: in vitro studies that evaluated the effect of CHX application during the bonding procedures (application after acid etching) on immediate and delay dentin bond strength of resin-dentin interface. Results: The initial search yielded 214 publications, of which 8 were selected after thorough methodological assessment. None of the clinical studies fulfilled the eligibility criteria. Our results indicated that in comparison to the control group, CHX significantly reduced immediate resin-dentin bond strength (P=0.043). These values were increased after aging (P<0.001). Conclusion: Based on this invitro Meta-analysis CHX application, improve resin-dentin bond strength durability in primary teeth.
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Affiliation(s)
- Masoumeh Ebrahimi
- Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Pediatric Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Sara Majidinia
- Dental Materials Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Esthetic and Restorative Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Alireza Sarraf
- Department of Pediatric Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.,Dental Materials Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
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Venâncio GN, Bridi EC, Teixeira LN, Basting RT, Sousa IMDO, França FMG, do Amaral FLB, Turssi CP, Basting RT. Phenolic extract of Libidibia ferrea inhibits dentin endogenous enzymatic activity depending on the adhesive system strategy. Microsc Res Tech 2021; 85:270-282. [PMID: 34386997 DOI: 10.1002/jemt.23902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 06/23/2021] [Accepted: 07/29/2021] [Indexed: 11/11/2022]
Abstract
This study evaluated the influence of Libidibia ferrea (Lf) extract used as dentin pretreatment on the resin-dentin bond strength stability and dentin endogenous enzymatic activity. The phytochemical profile (PP) of the Lf extract was evaluated by liquid chromatography; particle size, polydispersity index (PdI), and zeta potential (ZP) were evaluated by dynamic light scattering. The tested groups were ER-Scotchbond Universal (SBU) in the etch-and-rinse (ER) mode; ERLf-SBU in the ER mode + Lf after etching; SE- SBU in the self-etch (SE) mode; and LfSE-Lf before SBU in the SE mode. Sticks were obtained for microtensile bond strength tests and failure mode (24 hr and 12 months). The hybrid layer was evaluated using scanning electron microscopy. The endogenous enzymatic activity of the underlying dentin was analyzed by in situ zymography with the same treatments. The PP showed the presence of quercetin (2.6% w/w). Lf particles were considered large after the analysis of the PdI. The ZP remained stable over time. The ER and ERLf groups had lower bond strength after 12 months, but SE and LfSE remained stable. The predominant failure mode was adhesive for both times. ER and ERLf had longer resin tags and a thicker hybrid layer. The ER and LfSE groups showed higher enzymatic activity than the ERLf and SE groups after 12 months. The Lf extract may contribute to inhibit the dentin endogenous enzymatic activity when associated with an adhesive system in the ER mode.
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Affiliation(s)
- Gisely Naura Venâncio
- Faculdade São Leopoldo Mandic, Restorative Dentistry and Dental Materials Division, Campinas, SP, Brazil
| | - Enrico Coser Bridi
- Faculdade São Leopoldo Mandic, Restorative Dentistry and Dental Materials Division, Campinas, SP, Brazil
| | - Lucas Novaes Teixeira
- Faculdade São Leopoldo Mandic, Cell Biology and Oral Pathology Division, Campinas, SP, Brazil
| | - Rosanna Tarkany Basting
- Faculdade São Leopoldo Mandic, Laboratory of Neuroimmune Interface of Pain Research, Campinas, SP, Brazil
| | | | | | | | - Cecilia Pedroso Turssi
- Faculdade São Leopoldo Mandic, Restorative Dentistry and Dental Materials Division, Campinas, SP, Brazil
| | - Roberta Tarkany Basting
- Faculdade São Leopoldo Mandic, Restorative Dentistry and Dental Materials Division, Campinas, SP, Brazil
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16
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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.
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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
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17
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Effect of Remineralized Collagen on Dentin Bond Strength through Calcium Phosphate Ion Clusters or Metastable Calcium Phosphate Solution. NANOMATERIALS 2020; 10:nano10112203. [PMID: 33158249 PMCID: PMC7694251 DOI: 10.3390/nano10112203] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 10/26/2020] [Accepted: 11/02/2020] [Indexed: 01/09/2023]
Abstract
This study aimed to investigate whether dentin remineralization and micro-tensile bond strength increase when using calcium phosphate ion clusters (CPICs) or metastable Ca-P. After being etched, each dentin specimen was designated into four groups and treated with the appropriate solution for 1 min: 100% ethanol, 2 and 1 mg/mL of CPICs, and metastable Ca-P. The specimens were then prepared for scanning electron microscopy (SEM), transmission electron microscropy (TEM) imaging, a matrix metalloproteinases inhibition assay, and the micro-tensile bond strength test. To compare among the groups, one-way analysis of variance was performed. In the SEM imaging, with a rising concentration of CPICs, the degree of remineralization of dentin increased significantly. The metastable Ca-P treated specimens showed a similar level of remineralization as the 1 mg/mL CPICs treated specimens. The TEM imaging also revealed that dentin remineralization occurs in a CPICs concentration-dependent manner between the demineralized dentin and the resin layer. Furthermore, the results of micro-tensile bond strength showed the same trend as the results confirmed by SEM and TEM. We demonstrated that a 1 min pretreatment of CPICs or metastable Ca-P in etched dentin collagen fibril can achieve biomimetic remineralization and increase micro-tensile bond strength.
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Nivedita L, Prakash V, Mitthra S, Pearlin Mary NSG, Venkatesh A, Subbiya A. Evaluation of the effect of collagen stabilizing agents like chitosan and proanthocyanidin on the shear bond strength to dentin and microleakage of resin composite at enamel and cemental walls: An in vitro study. J Conserv Dent 2020; 22:483-489. [PMID: 33082667 PMCID: PMC7537744 DOI: 10.4103/jcd.jcd_195_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 06/13/2020] [Accepted: 06/25/2020] [Indexed: 11/06/2022] Open
Abstract
Objectives: The objective is to evaluate the effect of collagen stabilizing agents-chitosan and proanthocyanidin (PA) on the shear bond strength to dentin and microleakage of resin composite at enamel and cemental walls. Materials and Methods: Thirty premolars were decoronated 2 mm above cemento-enamel junction and restored with composite resin. Teeth were then randomly divided into three groups: Group I - Control, Group II - Pre-treatment with chitosan, and Group III - Pre-treatment with PA. Samples were then subjected to thermocycling for 500 cycles at 5°C and 55°C with the dwell time of 30 s and transfer time of 5–10 s. Then, the samples were subjected to shear bond strength evaluation on Universal testing machine. Shear load was applied until failure occurred. The load to failure was recorded individually and statistical analysis was done. Microleakage was determined by methylene blue dye penetration method and subjected to stereomicroscopic evaluation. Statistical analysis was carried out using Mann–Whitney test and Chi-square test. Results: Group II specimens produced the highest median shear bond strength and group I showed the least. In addition, Group I, Group II, and Group III showed no statistically significant difference in microleakage. Conclusions: Application of Chitosan and PA improved the shear bond strength to dentin as compared to the control. However, no significant difference in shear bond strength and microleakage was found between them.
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Affiliation(s)
- Lukram Nivedita
- Department of Conservative Dentistry and Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
| | - Venkatachalam Prakash
- Department of Conservative Dentistry and Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
| | - Suresh Mitthra
- Department of Conservative Dentistry and Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
| | - Newbegin Selvakumar Gold Pearlin Mary
- Department of Conservative Dentistry and Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
| | - Alagarsamy Venkatesh
- Department of Conservative Dentistry and Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
| | - Arunajatesan Subbiya
- Department of Conservative Dentistry and Endodontics, Sree Balaji Dental College and Hospital, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
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19
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Choi Y, Sun W, Kim Y, Kim IR, Gong MK, Yoon SY, Bae MK, Park BS, Park SB, Kim YI. Effects of Zn-Doped Mesoporous Bioactive Glass Nanoparticles in Etch-and-Rinse Adhesive on the Microtensile Bond Strength. NANOMATERIALS 2020; 10:nano10101943. [PMID: 33003534 PMCID: PMC7601785 DOI: 10.3390/nano10101943] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 09/17/2020] [Accepted: 09/28/2020] [Indexed: 01/05/2023]
Abstract
The purpose of this study was to assess the effects in the dentin bond strength of dental adhesives (DAs) and biological effects using zinc (Zn)-doped mesoporous bioactive glass nanoparticles (MBN-Zn). Synthesized MBN and MBN-Zn were characterized by scanning electron microscopy (SEM), X-ray diffraction and the Brunauer, Emmett and Teller (BET) method. The matrix metalloproteinases (MMP) inhibition effects of DA-MBN and DA-MBN-Zn were analyzed. The microtensile bond strength (MTBS) test was conducted before and after thermocycling to investigate the effects of MBN and MBN-Zn on the MTBS of DAs. The biological properties of DA-MBN and DA-MBN-Zn were analyzed with human dental pulp stem cells (hDPSCs). Compared with the DA, only the DA-1.0% MBN and DA-1.0% MBN-Zn exhibited a statistically significant decrease in MMP activity. The MTBS values after thermocycling were significantly increased in DA-1.0% MBN and DA-1.0% MBN-Zn compared with the DA (p < 0.05). It was confirmed via the MTT assay that there was no cytotoxicity for hDPSCs at 50% extract. In addition, significant increases in the alkaline phosphatase activity and Alizarin Red S staining were observed only in DA-1.0%MBN-Zn. These data suggest the 1.0% MBN and 1.0% MBN-Zn enhance the remineralization capability of DAs and stabilize the long-term MTBS of DAs by inhibiting MMPs.
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Affiliation(s)
- Yeonju Choi
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea; (Y.C.); (M.-K.G.); (S.-B.P.)
| | - Woogyeong Sun
- School of Materials Science and Engineering, Pusan National University, Busan 46241, Korea; (W.S.); (S.-Y.Y.)
| | - Yeon Kim
- Department of Oral Physiology, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.K.); (M.-K.B.)
| | - In-Ryoung Kim
- Department of Oral Anatomy, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (I.-R.K.); (B.-S.P.)
| | - Mi-Kyung Gong
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea; (Y.C.); (M.-K.G.); (S.-B.P.)
| | - Seog-Young Yoon
- School of Materials Science and Engineering, Pusan National University, Busan 46241, Korea; (W.S.); (S.-Y.Y.)
| | - Moon-Kyoung Bae
- Department of Oral Physiology, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.K.); (M.-K.B.)
| | - Bong-Soo Park
- Department of Oral Anatomy, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (I.-R.K.); (B.-S.P.)
| | - Soo-Byung Park
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea; (Y.C.); (M.-K.G.); (S.-B.P.)
| | - Yong-Il Kim
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea; (Y.C.); (M.-K.G.); (S.-B.P.)
- Dental and Life Science Institute, Pusan National University, Yangsan 50612, Korea
- Correspondence: ; Tel.: +82-55-360-5163
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20
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Firouzmandi M, Vasei F, Giti R, Sadeghi H. Effect of silver diamine fluoride and proanthocyanidin on resistance of carious dentin to acid challenges. PLoS One 2020; 15:e0238590. [PMID: 32941456 PMCID: PMC7498094 DOI: 10.1371/journal.pone.0238590] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 08/19/2020] [Indexed: 01/03/2023] Open
Abstract
The aim of this study was to evaluate the effect of silver diamine fluoride and grape seed extract on the microstructure and mechanical properties of carious dentin following exposure to acidic challenge. Ninety-eight molars with occlusal caries were used. In the control group the specimens were kept in distilled water. In the GSE group, the specimens were immersed in 6.5% grape seed extract solution for 30 minutes. In the SDF group, the specimens were immersed in 30% SDF solution for 4 minutes. In the GSE+SDF group, the specimens were immersed in 6.5% grape seed extract solution for 30 minutes and then exposed to 30% SDF solution for 4 minutes. All the groups underwent pH cycling model for 8 days. Microhardness measurements were taken at the baseline before surface treatments and after pH cycling. Elastic modulus was measured, after pH cycling. In the control group, the final hardness was significantly lower than the initial hardness (P = 0.001). In the SDF group, the final hardness was significantly higher than the initial hardness (P < 0.001). There was no significant difference between the initial and final hardness values in the GSE and GSE + SDF groups (p = 0.92, p = 0.07). The H1-H0 in the SDF group was significantly higher than the other groups (P<0.05). Moreover, elastic modulus of the experimental groups except GSE+SDF group was significantly higher than control. The highest mean elastic modulus was detected in the SDF group (P<0.001). The use of SDF and GSE prior to the acid challenge improved mechanical properties. Microstructural investigation, using scanning electron microscope showed dentin structure protection against acid challenges with SDF treatment and collagen matrix stabilization with GSE treatment. However combined use of these agents was not beneficious.
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Affiliation(s)
- Maryam Firouzmandi
- Oral and Dental Disease Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fateme Vasei
- Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
- * E-mail:
| | - Rashin Giti
- Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hadis Sadeghi
- Student Research Committee, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran
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21
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de Moraes IQS, do Nascimento TG, da Silva AT, de Lira LMSS, Parolia A, Porto ICCDM. Inhibition of matrix metalloproteinases: a troubleshooting for dentin adhesion. Restor Dent Endod 2020; 45:e31. [PMID: 32839712 PMCID: PMC7431940 DOI: 10.5395/rde.2020.45.e31] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 02/17/2020] [Accepted: 03/05/2020] [Indexed: 02/07/2023] Open
Abstract
Matrix metalloproteinases (MMPs) are enzymes that can degrade collagen in hybrid layer and reduce the longevity of adhesive restorations. As scientific understanding of the MMPs has advanced, useful strategies focusing on preventing these enzymes' actions by MMP inhibitors have quickly developed in many medical fields. However, in restorative dentistry, it is still not well established. This paper is an overview of the strategies to inhibit MMPs that can achieve a long-lasting material-tooth adhesion. Literature search was performed comprehensively using the electronic databases: PubMed, ScienceDirect and Scopus including articles from May 2007 to December 2019 and the main search terms were “matrix metalloproteinases”, “collagen”, and “dentin” and “hybrid layer”. MMPs typical structure consists of several distinct domains. MMP inhibitors can be divided into 2 main groups: synthetic (synthetic-peptides, non-peptide molecules and compounds, tetracyclines, metallic ions, and others) and natural bioactive inhibitors mainly flavonoids. Selective inhibitors of MMPs promise to be the future for specific targeting of preventing dentin proteolysis. The knowledge about MMPs functionality should be considered to synthesize drugs capable to efficiently and selectively block MMPs chemical routes targeting their inactivation in order to overcome the current limitations of the therapeutic use of MMPs inhibitors, i.e., easy clinical application and long-lasting effect.
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Affiliation(s)
- Izadora Quintela Souza de Moraes
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Ticiano Gomes do Nascimento
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Antonio Thomás da Silva
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Lilian Maria Santos Silva de Lira
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
| | - Abhishek Parolia
- Division of Clinical Dentistry, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia
| | - Isabel Cristina Celerino de Moraes Porto
- Laboratory of Pharmaceutical and Food Analysis, Institute of Pharmaceutical Sciences, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil.,Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Alagoas, Campus A. C. Simões, Maceió, Alagoas, Brazil
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22
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Yang SY, Liu Y, Mao J, Wu YB, Deng YL, Qi SC, Zhou YC, Gong SQ. The antibiofilm and collagen-stabilizing effects of proanthocyanidin as an auxiliary endodontic irrigant. Int Endod J 2020; 53:824-833. [PMID: 32053733 DOI: 10.1111/iej.13280] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 02/11/2020] [Indexed: 11/29/2022]
Abstract
AIM To evaluate the antibiofilm effect of proanthocyanidin (PA) solution as an irrigant against Enterococcus faecalis (E. faecalis) and its influence on the mechanical properties and biodegradation resistance of demineralized root dentine. METHODOLOGY Enterococcus faecalis were introduced into human root dentine tubules by a serial centrifugation method and grown for 1 week. Dentine blocks infected with 1-week-old E. faecalis biofilms were treated with the following irrigants: sterile water (control), 2% chlorhexidine (CHX), 2% PA, 5% PA and 10% PA. After treatment, the live and dead bacteria proportions within E. faecalis biofilms were analysed using confocal laser scanning microscopy. To evaluate the biostability of fully demineralized dentine treated by the aforementioned irrigants, the elastic modulus and hydroxyproline release of human dentine incubated in collagenase solution were tested at baseline, after irrigant treatment and after biodegradation, respectively. Furthermore, the surface chemical bond of demineralized dentine collagen treated by various irrigants was characterized by X-ray photoelectron spectroscopy (XPS). Statistical analysis was performed using one-way anova and Tukey's post hoc multiple comparisons with the significance level at 5%. RESULTS The proportion of dead E. faecalis volume was significantly higher in the PA and CHX groups than that in the control group (P < 0.05). PA irrigation significantly increased the mechanical properties of demineralized dentine (P < 0.05), and the effect was enhanced with increasing PA concentration. CHX and PA groups had significantly less elasticity loss and hydroxyproline release (P < 0.05). The biomodification of dentine collagen by PA was verified by increased C-O/C-N peak percentage under C1s and C-O peak percentage under O1s narrow-scan XPS spectra. CONCLUSIONS Proanthocyanidin killed E. faecalis within biofilms and enhanced the biostability of the collagen matrix of demineralized root dentine. It might be used as an auxiliary endodontic irrigant with antibiofilm and collagen-stabilizing effects.
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Affiliation(s)
- S Y Yang
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Liu
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - J Mao
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Y B Wu
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Y L Deng
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - S C Qi
- Department of Stomatology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Y C Zhou
- The Stony Brook School, Stony Brook, NY, USA
| | - S Q Gong
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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23
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Kaczor K, Krasowski M, Lipa S, Sokołowski J, Nowicka A. How Do the Etching Mode and Thermomechanical Loading Influence the Marginal Integrity of Universal Adhesives? Oper Dent 2019; 45:306-317. [PMID: 31750802 DOI: 10.2341/19-002-l] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE This study evaluated the effect of etching mode and thermomechanical loading on universal adhesives. METHODS AND MATERIALS Two universal adhesives, Peak Universal and Adhese Universal, were used in two etching modes as the experimental groups: Peak Universal etch-and-rinse (PER), Peak Universal self-etch (PSE), Adhese Universal etch-and-rinse (AER), and Adhese Universal self-etch (ASE). Two adhesives considered gold standards were used as control groups: OptiBond FL (OER) was used as a control group for the etch-and-rinse (ER) mode, and Clearfil SE Bond (CSE) was used as a control group for the self-etch (SE) mode. Standardized class V cavities were created on the buccal and lingual surface in 30 extracted caries-free human third molars. Each adhesive and resin composite was applied according to the manufacturer's instructions. The specimens were subjected to thermomechanical loading (TML) immediately after the fillings were placed. Before and after TML, replicas and photographs of the fillings were performed and evaluated quantitatively and qualitatively. The Mann-Whitney U-test or Kruskal-Wallis test was used for quantitative analyses, and Fisher exact test was used for qualitative analysis. RESULTS Adhese Universal achieved a significantly higher percentage of continuous margin in the enamel than Peak Universal for the two types of etching both before and after TML (except for the SE group after TML). In dentin, the greatest percentage of continuous margin was achieved for Adhese Universal in the ER group (100%) before TML and for both universal adhesives in the SE groups (61%) after TML. For both etching modes and both time points, Adhese Universal had a greater percentage of continuous margin than Peak Universal for the whole margin. For the ER approach, significant differences were observed both before and after TML, and for the SE approach, significant differences were observed before TML. TML did not cause a significant decrease in the percentage of continuous margin in the enamel, but the results were the opposite in dentin. A qualitative assessment using World Dental Federation criteria did not show statistically significant differences between the groups. CONCLUSIONS Scanning electron microscope assessment of marginal integrity showed that the evaluated factors such as etching mode and TML significantly influenced the marginal integrity of the universal adhesives. The replica method shows that laboratory and clinical assessment methods complement each other and give a broader view of marginal integrity.
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24
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Paludo T, Marcondes ML, Souto AA, Lopes GC, Loguércio AD, Spohr AM. Effect of grape seed extract-containing phosphoric acid formulations on bonding to enamel and dentin. Braz Oral Res 2019; 33:e098. [PMID: 31664361 DOI: 10.1590/1807-3107bor-2019.vol33.0098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 09/01/2019] [Indexed: 01/06/2023] Open
Abstract
The aim was to evaluate the effect of 2% grape seed extract (GSE) containing phosphoric acid (PhA) on the bond strength to enamel and dentin. The control group was 37% PhA. The following three PhA formulations with 2% GSE and 20% ethanol were obtained: GSE5 = 5% PhA; GSE10 = 10% PhA; and GSE20 = 20% PhA. The enamel and dentin surfaces of molars were etched with the acid solutions, followed by Scotchbond Multi-Purpose adhesive and composite resin application. The tensile bond strength (TBS) test evaluated the bond to enamel after 24 h, and the microtensile bond strength (μTBS) test evaluated the bond to dentin after 24 h and 12-month water storage. Etched enamel and dentin were observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. The TBS data were submitted to one-way ANOVA, while µTBS data were submitted to two-way ANOVA and Tukey's test (α = 0.05). The TBS (MPa) to enamel did not significantly differ among the control (48.1 ± 15.7), GSE5 (46.1 ± 9.6), GSE10 (49.8 ± 13.6) and GSE20 (44.1 ± 11.9) groups (p = 0.537). The µTBS (MPa) to dentin of the control (28.4 ± 14.4) and GSE20 (24.1 ± 8.1) groups were significantly higher than those of the GSE5 (16.8 ± 7.4) and GSE10 (17.5 ± 6.6) groups at 24 h (p < 0.006). After 12-month storage, only GSE5 (21.0 ± 7.8) and GSE10 (17.6 ± 8.0) did not show significantly decreased μTBS (p > 0.145). SEM micrographs showed a shallower enamel etching pattern for GSE5. AFM images showed the formation of collagenous globular structures for GSE5 and GSE10. The different acid solutions did not influence the TBS to enamel, and the µTBS to dentin was stable over time when dentin was etched with GSE5 and GSE10.
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Affiliation(s)
- Tamara Paludo
- Pontifícia Universidade Católica do Rio Grande do Sul - PUC-RS, Department of Restorative Dentistry, Porto Alegre, RS, Brazil
| | - Maurem Leitão Marcondes
- Pontifícia Universidade Católica do Rio Grande do Sul - PUC-RS, Department of Restorative Dentistry, Porto Alegre, RS, Brazil
| | - André Arigony Souto
- Pontifícia Universidade Católica do Rio Grande do Sul - PUC-RS, Department of Chemistry, Porto Alegre, RS, Brazil
| | - Guilherme Carpena Lopes
- Universidade Federal de Santa Catarina - UFSC, Department of Operative Dentistry, Florianópolis, SC, Brazil
| | | | - Ana Maria Spohr
- Pontifícia Universidade Católica do Rio Grande do Sul - PUC-RS, Department of Restorative Dentistry, Porto Alegre, RS, Brazil
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25
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Firouzmandi M, Shafiei F, Jowkar Z, Nazemi F. Effect of Silver Diamine Fluoride and Proanthocyanidin on Mechanical Properties of Caries-Affected Dentin. Eur J Dent 2019; 13:255-260. [PMID: 31480088 PMCID: PMC6777154 DOI: 10.1055/s-0039-1693237] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
OBJECTIVES Inner carious dentin is specified with decreased minerals and collagen cross-links but without protein denaturation. Current minimally invasive dentistry concepts recommend removal of only the outer layer of carious dentin and biomodification of repairable inner carious dentin. The present study aims to investigate the possibility of functional repair of this layer using silver diamine fluoride (SDF) and grape seed extract (GSE). MATERIALS AND METHODS Molar teeth with occlusal caries were used to prepare caries-affected dentin specimens for hardness and elastic modulus measurements. The specimens of each test were divided randomly into four equal groups. In the GSE group, the specimens were immersed in 6.5% GSE solution for 10 minutes. In the SDF group, the specimens underwent a topical application of a 30% SDF. In the GSE+SDF group, first the specimens were immersed in GSE and then exposed to SDF. In the SDF+GSE group, first SDF was applied and then the specimens were immersed in GSE. Microhardness measurements were taken at baseline and after treatment. A control group with distilled water treatment was also prepared for elastic modulus measurements. STATISTICAL ANALYSIS One-way analysis of variance and post-hoc tests were used for statistical analysis. RESULTS There were significant differences in H1-H0 (final hardness-baseline hardness) among the groups. Baseline and final hardness of each group was also significantly different (SDF>SDF+GSE>GSE>GSE+SDF). Elastic modulus of SDF and SDF+GSE increased compared to the control group. CONCLUSIONS SDF and SDF+GSE treatment can be recommended to increase hardness and elastic modulus of caries-affected dentin.
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Affiliation(s)
- Maryam Firouzmandi
- Oral and Dental Disease Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fereshteh Shafiei
- Oral and Dental Disease Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Zahra Jowkar
- Oral and Dental Disease Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fereshteh Nazemi
- Student Research Committee, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran
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26
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Borgo GO, Vieira-Junior WF, Theobaldo JD, Aguiar FHB, Lima DANL. Effect of Dentin Pretreatment with Arginine on Microshear Bond Strength of Etch-and-Rinse or Self-Etch Adhesive Systems. Eur J Dent 2019; 13:199-205. [PMID: 31476775 PMCID: PMC6777174 DOI: 10.1055/s-0039-1694307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Objective
The main purpose of this study was to evaluate the effect of dentin pretreatment with 8% arginine on the immediate and 6-month bond strength (BS) of adhesive systems and surface morphology of dentin.
Materials and Methods
Dentin bovine specimens (5 × 5 mm) were allocated into following pretreatments: without pretreatment (conventional technique, C) or exposure to arginine solution (A) for 5 minutes prior to tooth restoration. The adhesive procedure was performed using (
n
= 12): 3-step etch-and-rinse adhesive (Scotchbond Multipurpose—SBMP [C+SBMP and A+SBMP]); 2-step etch-and-rinse adhesive (Single Bond 2 - SB [C+SB and A+SB]); or 2-step self-etch adhesive (Clearfil SE Bond - CSEB [C+CSEB and A+CSEB]). After 24 hours, the composite resin restorations were evaluated immediately and after 6 months of water storage using a microshear test and fracture pattern. The dentin surface exposed to A was assessed by scanning electron microscopy (SEM). The immediate BS data were submitted to a two-way analysis of variance and Tukey's test, and the long-term BS results were analyzed using Kruskal–Wallis and Dunn tests (α = 0.05).
Results
There was a significant decrease in immediate and 6-month BS for the A+SB and A+CSEB groups, which differed statistically from the C group. The fracture pattern was predominantly adhesive for SB and CSEB adhesive for C and A. The SEM images presented a different conditioning pattern of the dentin exposed to A.
Conclusion
The dentin pretreatment with arginine interfered negatively in the immediate and long-term BS of the simplified adhesive system. However, the SBMP adhesive was not affected by arginine pretreatment presenting the most satisfactory results.
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Affiliation(s)
- Gabriela Oliveira Borgo
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Waldemir Francisco Vieira-Junior
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.,Department of Restorative Dentistry, São Leopoldo Mandic Institute and Dental Research Center, Campinas, São Paulo, Brazil.,School of Health Sciences, Centro Universitário das Faculdades Metropolitanas Unidas, São Paulo, Brazil
| | - Jéssica Dias Theobaldo
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.,School of Health Sciences, Centro Universitário das Faculdades Metropolitanas Unidas, São Paulo, Brazil
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Débora Alves Nunes Leite Lima
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
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27
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Cai J, Burrow MF, Manton DJ, Tsuda Y, Sobh EG, Palamara JEA. Effects of silver diamine fluoride/potassium iodide on artificial root caries lesions with adjunctive application of proanthocyanidin. Acta Biomater 2019; 88:491-502. [PMID: 30776507 DOI: 10.1016/j.actbio.2019.02.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/29/2019] [Accepted: 02/14/2019] [Indexed: 12/26/2022]
Abstract
Treatment of carious root surfaces remains challenging due to the complex pathological processes and difficulty in restoring the original structure of root dentine. Current treatments targeting the de-/re-mineralisation processes are not entirely satisfactory in terms of the protection of the dentinal organic matrix and the highly organised structure of dentine. In this in vitro study, a cross-linking agent - proanthocyanidin (PA) was used in conjunction with a fluoride-based treatment - silver diamine fluoride/potassium iodide (SDF/KI) to putatively stabilise the organic dentinal framework as well as strengthen the collagen-mineral phase interaction. The effectiveness of this strategy was evaluated 24 h after application in terms of the distribution of ion uptake and microstructure of dentine after treatment as well as analysis of the nano-mechanical properties using a dynamic behaviour model. Results showed that individual use of SDF/KI significantly improved the surface microhardness and integrated mineral density (Z) up to 60 µm depth and the recovery of creep behaviour of demineralised dentine in the surface area compared to that treated with deionised distilled water (DDW). The combined treatment of PA and SDF/KI achieved a more homogenous mineral distribution throughout the lesions than SDF/KI alone; a more significant incremental increase in surface microhardness and Z was observed. Specifically, a superior effect on the subsurface area occurred with PA + SDF/KI, with significant improvements in microhardness, elastic modulus and recovery of creep behaviour of the demineralised dentine. Application of SDF/KI induced small discrete crystal formation distributed over the dentine surface and PA contributed to the formation of slit-shaped orifices of the dentinal tubules that were partially occluded. STATEMENT OF SIGNIFICANCE: Demographic transitions and improved oral health behaviour have resulted in increased tooth retention in elderly people. As a consequence, the risk of root dentine caries is increasing due to the age-associated gingival recession and the related frequent exposure of cervical root dentine. Root caries is difficult to repair because of the complex aetiology and dentine structure. The recovery of dentine quality depends not only on reincorporation of minerals but also an intact dentinal organic matrix and the organic-inorganic interfacial structure, which contribute to the biomechanics of dentine. With the capability of dentine modification, cross-linking agents were applied with a fluoride regimen, which improved its treatment efficacy of root caries regarding the distribution of ion uptake and recovery of dentine biomechanics.
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Affiliation(s)
- Jing Cai
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC 3053, Australia
| | - Michael F Burrow
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC 3053, Australia; Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Sai Ying Pun, Hong Kong Special Administrative Region
| | - David J Manton
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC 3053, Australia
| | - Yuka Tsuda
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC 3053, Australia
| | - Eman G Sobh
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC 3053, Australia
| | - Joseph E A Palamara
- Melbourne Dental School, The University of Melbourne, 720 Swanston Street, Carlton, VIC 3053, Australia.
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28
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RODRIGUES RB, GIOPPO NM, BUSATO PDMR, MENDONÇA MJ, CAMILOTTI V. In vitro evaluation of the antibacterial behavior of a self-etch adhesive associated with chlorhexidine. REVISTA DE ODONTOLOGIA DA UNESP 2019. [DOI: 10.1590/1807-2577.09417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Abstract Introduction Adhesive technology has been developed quickly since its introduction about fifty years ago. Its goal is to produce a close contact within enamel and dentin. Failures in this process could result in microleakage, and allow the infiltration of bacteria, fluids and ions. Recent studies have been shown the use of chlorhexidine associated with adhesive systems can be able to inhibit the bacteria action. Objective The aim of this study was to evaluate the addiction of different percentages of chlorhexidine to a self-etch adhesive. Methodology The solution of digluconatechlorhexidine was increased to the primer of the two pass self etch adhesive to create a 0.5%, 1.0% and 2.0% chlorhexidine primer solution and after they were distributed in four groups (G1, G2, G3 and G4). Saliva samples (N=10) were used to test bacteria activity. Result They were spread in a blood medium with filter paper disks containing the different treatments. After the incubation, the inhibitions halos formation were evaluated. Conclusion This study demonstrated that, in vitro, the addition of different percentages of chlorhexidine digluconate to the self-etch adhesive induced inhibited halos at bacteria of saliva samples, independent from their concentration.
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29
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Bridi E, Leme-Kraus A, Aydin B, Basting R, Bedran-Russo A. Long-term evaluation of the stability of dentin matrix following treatments with aqueous solutions of titanium tetrafluoride at different concentrations. Arch Oral Biol 2018; 91:51-56. [DOI: 10.1016/j.archoralbio.2018.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 04/05/2018] [Accepted: 04/08/2018] [Indexed: 12/21/2022]
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30
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Oh S, Jung HS, Kim HJ, Jang JH, Kim DS, Choi KK, Kim SY. Effect of zinc on the collagen degradation in acid-etched dentin. J Dent Sci 2018; 13:97-102. [PMID: 30895103 PMCID: PMC6388857 DOI: 10.1016/j.jds.2017.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 10/10/2017] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND/PURPOSE Matrix metalloproteinases (MMPs) play a crucial role in the pathogenesis of dental caries, collapse of adhesive interface, and chemical erosion of teeth. The objective of this study was to investigate the inhibitory effect of zinc on collagen degradation. MATERIALS AND METHODS Human dentin was ground and demineralized by citric acid (pH 2.0). The demineralized ground dentin was incubated in six different media: artificial saliva (AS); 5 mg/ml doxycycline in AS; 3.33, 6.82, 13.63, and 27.26 mg/ml of zinc chloride (Zn) in AS. Each group was divided into two subgroups, and active MMP-2 was incorporated into one subgroup. Specimens were incubated for 24 h, 1 week, and 2 weeks. Collagen degradation product was assessed using ELISA. The results were analyzed using repeated measured ANOVA and Duncan's post hoc analysis (α = 0.05). RESULTS The amount of collagen degradation was the lowest in Doxy group. Zn groups showed a significant inhibitory effect in collagen degradation for all concentrations (P < 0.05). In subgroups without exogenous MMP-2, zinc-mediated inhibition increased in a concentration-dependent manner with increasing zinc concentration. The amount of collagen degradation product slightly increased with increased incubation time from 24 h to 2 weeks. However, in subgroups with exogenous MMP, the inhibitory effect of zinc on collagen degradation did not depend on zinc concentration. CONCLUSION All Zn groups for the four concentrations tested exhibited statistically significant inhibitory effect on collagen degradation.
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Affiliation(s)
- Soram Oh
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Hyun-Sook Jung
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Hyun-Jung Kim
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Ji-Hyun Jang
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Duck-Su Kim
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Kyoung-Kyu Choi
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Sun-Young Kim
- Department of Conservative Dentistry, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
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31
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Vallabhdas AK, Kumar CNV, Kabbinale P, Nayak R, Rajakumari M, Shilpa T. Evaluation of Hybrid Layer and Bonding Interface after Water Storage with and without the Usage of 2% Chlorhexidine: A Scanning Electron Microscope Study. J Contemp Dent Pract 2018; 19:52-59. [PMID: 29358535 DOI: 10.5005/jp-journals-10024-2211] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
AIM Restorative dentists employ different bonding systems between the resin and the dentin and other dentinal tissues to achieve the goal of micromechanical retention. Studies have shown that the bond between composite and dentin degrades over time because of the action of matrix metalloproteinases (MMPs) on collagen fibrils left unprotected by acid etching. The MMPs may be partially responsible for hybrid layer degradation. Since chlorhexidine (CHX) inhibits MMPs, we hypothesized that CHX would decelerate the loss of resin-dentin bonds. Hence, this in vitro study is intended to evaluate the effects of 2% CHX on hybrid layer and bonding interface. MATERIALS AND METHODS Totally, 40 freshly extracted molars were randomly divided into four experimental groups. In all 40 specimens, class II cavities were prepared to a depth of 1 mm below the dentinoenamel junction with no axial wall, but the elimination of the proximal enamel ridge. The teeth were then randomly divided into four experimental groups, i.e., All Bond 2 without 2% CHX (group I), All Bond 2 with 2% CHX (group II), One Coat 7.0 without 2% CHX (group III), and One Coat 7.0 with 2% CHX (group IV). All the specimens were derooted and sectioned mesiodistally into two halves and placed under water at 37°C for 3 months and observed under scanning electron microscope for the hybrid layer and resin tag formation. RESULTS Groups I and II showed statistically significant difference when the presence/absence of resin tags was compared. When groups III and IV were compared for the presence/absence of hybrid layer and resin tags, the results were statistically significant. CONCLUSION Between all the four experimental groups, irrespective of the bonding systems used, we concluded that groups with 2% CHX usage showed promising results with presence/ absence of hybrid layer and resin tags formation. CLINICAL SIGNIFICANCE Studies suggest that the bond between composite and dentin degrades over time because of the action of MMPs on collagen fibrils left unprotected by acid etching. Measures should be taken to prevent this from happening and thus allow bond between composite and dentin last longer.
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Affiliation(s)
- Anand K Vallabhdas
- Department of Conservative Dentistry and Endodontics Subbaiah Institute of Dental Sciences, Shimoga, Karnataka India
| | - C N Vijay Kumar
- Department of Conservative Dentistry and Endodontics Subbaiah Institute of Dental Sciences, Shimoga, Karnataka India, Phone: +919480047110, e-mail:
| | - Pradeep Kabbinale
- Department of Conservative Dentistry and Endodontics Subbaiah Institute of Dental Sciences, Shimoga, Karnataka India
| | - Rajaram Nayak
- Department of Conservative Dentistry and Endodontics, A.J. Institute of Dental Sciences, Mangaluru, Karnataka, India
| | - Manju Rajakumari
- Department of Conservative Dentistry and Endodontics Subbaiah Institute of Dental Sciences, Shimoga, Karnataka India
| | - Thulasidharan Shilpa
- Department of Conservative Dentistry and Endodontics, A.J. Institute of Dental Sciences, Mangaluru, Karnataka, India
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Siqueira FSF, Cardenas AFM, Gomes GM, Chibinski AC, Gomes OMM, Bandeca MC, Loguercio AD, Gomes JC. Three-Year Effects of Deproteinization on the In Vitro Durability of Resin/Dentin-Eroded Interfaces. Oper Dent 2018; 43:60-70. [DOI: 10.2341/16-308-l] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objective:
To evaluate the effect of sodium hypochlorite on the immediate and three-year bonding properties of a resin-eroded dentin interface produced by one of two adhesive strategies.
Methods and Materials:
Forty-eight molars were randomly assigned to six experimental groups, according to the combination of the adhesive strategy (etch-and-rinse and self-etch) and the dentin surface (control groups without erosion, eroded dentin surface [ED], and eroded dentin surface + NaOCl 5.2% [ED + NaOCl]). After completing restoration, specimens were stored in water (37°C) for 24 hours and then sectioned into resin–dentin beams (0.8 mm2) to be tested under tension (0.5 mm/min) immediately thereafter or after three years of water storage. To assess nanoleakage (NL), specimens were immersed in silver nitrate solution and examined by scanning electron microscopy at both time points. The dentin-etching pattern was examined under a scanning electron microscope. Data were subjected to appropriate statistical analysis (α=0.05)
Results:
In both strategies, a more pronounced and significant reduction of the microtensile bond strength (μTBS) values was observed for the ED groups (p=0.0001) after three years. However, in the ED + NaOCl group, μTBS values were maintained after three years of water storage. Furthermore, application of NaOCl to eroded dentin significantly reduced the immediate NL values and also preserved these values after three years of water storage for both adhesive strategies (p>0.05). When considering the ED group, a superficial removal of the smear layer and enlarged lumen tubules in comparison to control were present. However, for ED + NaOCl, there was a total removal of the smear layer and significant numbers of collagen fibrils were exposed.
Conclusion:
The use of NaOCl may maintain the long-term stability of a resin-eroded dentin interface formed by etch-and-rinse and self-etch adhesives.
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Affiliation(s)
- FSF Siqueira
- Fabiana Suelen Figueredo de Siqueira, DDS, MS, PhD student, Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, Brazil
| | - AFM Cardenas
- Andres Felipe Millan Cardenas, DDS, MS, PhD, professor, Department of Postgraduate Program in Dentistry, CEUMA University, São Luis, Brazil
| | - GM Gomes
- Giovana Mongruel Gomes, DDS, MS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, Brazil
| | - AC Chibinski
- Ana Claúdia Rodriguez Chibinski, DDS, MS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, Brazil
| | - OMM Gomes
- Giovana Mongruel Gomes, DDS, MS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, Brazil
| | - MC Bandeca
- Matheus Coelho Bandeca, DDS, MS, PhD, professor, Department of Postgraduate Program in Dentistry, CEUMA University, São Luis, Brazil
| | - AD Loguercio
- Alessandro D. Loguercio, DDS, MS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, Brazil
| | - JC Gomes
- Giovana Mongruel Gomes, DDS, MS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, Ponta Grossa State University, Ponta Grossa, Brazil
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Breschi L, Maravic T, Cunha SR, Comba A, Cadenaro M, Tjäderhane L, Pashley DH, Tay FR, Mazzoni A. Dentin bonding systems: From dentin collagen structure to bond preservation and clinical applications. Dent Mater 2018; 34:78-96. [DOI: 10.1016/j.dental.2017.11.005] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 11/10/2017] [Indexed: 12/18/2022]
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ZnCl 2 Incorporated into Experimental Adhesives: Selected Physicochemical Properties and Resin-Dentin Bonding Stability. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5940479. [PMID: 29270433 PMCID: PMC5706081 DOI: 10.1155/2017/5940479] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 08/17/2017] [Accepted: 08/30/2017] [Indexed: 02/03/2023]
Abstract
The aim of this study was to evaluate the degree of conversion (DC%), water sorption (WS), solubility (SO), and resin-dentin bonding stability of experimental adhesive systems containing ZnCl2. Different concentrations (wt.%) of ZnCl2 were added to a model etch-and-rinse adhesive system consisting of BISGMA, HEMA, UDMA, GDMA, water, and ethanol: Zn0 (0%-control group); Zn2 (2%); Zn3.5 (3.5%); and Zn5 (5%). Adper Single Bond 2 (SB) was used as commercial reference. The samples were light cured for 20s using a quartz-tungsten-halogen unit (650 mW/cm2). DC% (n = 5) was measured using FT-IR spectroscopy, and WS and SO (n = 5) were calculated based on ISO4049. Microtensile bond strength (μTBS) and nanoleakage (NL) were measured after 24 h and 12 months of water storage (n = 10). Data were analyzed using ANOVA and Tukey's HSD test (5%). Zn5 presented the lowest DC% and the highest WS and SO (p < 0.05). Zn0 and Zn2 presented statistically similar DC%, WS, SO, and immediate μTBS. All adhesives containing ZnCl2 maintained a μTBS stability after 12 months, but only Zn2 and Zn3.5 did not suffer an increase in NL. SB presented the highest immediate μTBS but the greatest reduction after 12 months (p < 0.05). The addition of 2 wt.% of ZnCl2 in adhesive formulations seems to be a promising way to improve the resin-dentin bonding stability. Higher concentrations than 2 wt.% could impair some physicochemical properties.
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Vieira AR, Silva MB, Souza KKA, Filho AVA, Rosenblatt A, Modesto A. A Pragmatic Study Shows Failure of Dental Composite Fillings Is Genetically Determined: A Contribution to the Discussion on Dental Amalgams. Front Med (Lausanne) 2017; 4:186. [PMID: 29164121 PMCID: PMC5681741 DOI: 10.3389/fmed.2017.00186] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 10/16/2017] [Indexed: 01/01/2023] Open
Abstract
Composite resins for posterior tooth restorations have become a viable alternative to dental amalgam. Failures sometimes cannot be easily explained, and we hypothesize that a genetic component may influence longevity of restorations. We aimed to determine if there is any evidence for a difference in the performance of amalgams versus composite resin in extensive posterior restorations. We also aimed to determine if risk factors such as age, sex, smoking tobacco, alcohol drinking, diabetes status, and periodontal health status may have a role in the failures of extensive anterior composite restorations. Finally, we investigated if genetic variation in matrix metalloproteinases that are present in the mineralized dentin is associated with failure of composite resin. The data used to perform this research were obtained from the Dental Registry and DNA Repository project after screening 4,856 patients. All restorations were evaluated at times of 1, 2, and 5 years after the restoration placement. 6,266 amalgam and 2,010 composite restorations were analyzed in a total of 807 patients in a period of approximately 10 years (period corresponding to the database existence). An additional 443 extensive direct composite resin restorations in anterior teeth were also studied. Failure rates of amalgam and composite restorations are similar, and by the end of 5 years, composites outperformed amalgams slightly. Failures of anterior composite restorations occurred more often in males who smoked tobacco (p = 0.05), despite a similar number of females and males that smoked tobacco in the sample (116 individuals smoked tobacco, 54 females and 62 males). Alcohol drinking increased failure rate within 2 years (p = 0.03). We found a statistically significant association between matrix metalloproteinase 2 rs9923304 and failure of composite restorations (p = 0.007). Composite resins can replace amalgam restorations. Smoking tobacco and drinking alcohol will increase the chance of restoration failure.
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Affiliation(s)
- Alexandre R Vieira
- Departments of Oral Biology, University of Pittsburgh School of Dental Medicine, Pittsburgh, PA, United States.,Departments of Pediatric Dentistry, University of Pittsburgh School of Dental Medicine, Pittsburgh, PA, United States
| | - Marília B Silva
- Departments of Oral Biology, University of Pittsburgh School of Dental Medicine, Pittsburgh, PA, United States
| | - Kesia K A Souza
- Departments of Oral Biology, University of Pittsburgh School of Dental Medicine, Pittsburgh, PA, United States
| | - Arnôldo V A Filho
- Department of Preventive Dentistry, University of Pernambuco School of Dentistry, Recife, Pernambuco, Brazil
| | - Aronita Rosenblatt
- Department of Preventive Dentistry, University of Pernambuco School of Dentistry, Recife, Pernambuco, Brazil
| | - Adriana Modesto
- Departments of Pediatric Dentistry, University of Pittsburgh School of Dental Medicine, Pittsburgh, PA, United States
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Evaluate the effect of different mmps inhibitors on adhesive physical properties of dental adhesives, bond strength and mmp substarte activity. Sci Rep 2017; 7:4975. [PMID: 28694471 PMCID: PMC5503998 DOI: 10.1038/s41598-017-04340-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 05/10/2017] [Indexed: 11/29/2022] Open
Abstract
We have evaluated and compare the effect of different exogenous MMP inhibitors on adhesive physical properties of dental adhesives, bond strength, micro permeability and MMP substrate activity. 180-grit Sic paper was used to obtain the superficial dentin surface from each and every tooth after the wet grinding procedure. Dentin was exposed to four different MMP inhibitors to evaluate the effect on resin adhesive dentin interface. The four groups used in study were: 2% chlorhexidine digluconate, 2% doxycycline solution, 5% Proanthocyanidin (PR), Control Group. We evaluated and compared the four groups at each and every step of etching, bonding and resin application. Then, the immunolabeling was done with the help of the secondary antibodies with the pH of 7 and the dilution of 1:20. Amongst all the etching pretreatment groups, CHE group (Chlorhexidine etching group) revealed highest exposure to collagen fibrils than the other groups of etching. Then after the CHE group, the next group which has the second highest exposure DOE group. MMP inhibitor application for time duration of 1 minute after the etching procedures significantly improves the bond strength, exposure to collagen fibres and uniforms the dense form of dentin hybrid layer.
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Kong K, Hiraishi N, Nassar M, Otsuki M, Yiu CK, Tagami J. Effect of phytic acid etchant on resin–dentin bonding: Monomer penetration and stability of dentin collagen. J Prosthodont Res 2017; 61:251-258. [DOI: 10.1016/j.jpor.2016.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 09/29/2016] [Accepted: 10/03/2016] [Indexed: 10/20/2022]
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NEVES TPDC, LEANDRIN TP, TONETTO MR, ANDRADE MF, CAMPOS EAD. Resistência de união à microtração de sistemas adesivos “condiciona-e-lava” de dois passos: efeito de diferentes tratamentos da superfície dentinária condicionada. REVISTA DE ODONTOLOGIA DA UNESP 2017. [DOI: 10.1590/1807-2577.14016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Resumo Introdução A evolução dos sistemas adesivos permitiu que os fabricantes desenvolvessem materiais com técnicas cada vez mais simplificadas, porém que, ainda assim, promovessem adequados valores de resistência de união imediata. Sugere-se que alguns tratamentos da superfície dentinária podem favorecer esse processo de adesão. Objetivo Avaliar os efeitos de diferentes tratamentos, em superfície dentinária plana condicionada, sobre a resistência de união à microtração de sistemas adesivos do tipo “condiciona-e-lava” de dois passos. Material e método Noventa e seis terceiros molares humanos foram divididos em 12 grupos (n=8), aleatoriamente, de acordo com o sistema adesivo utilizado (GI: Adper Single Bond 2 - 3M ESPE; GII: Prime & Bond 2.1 - Dentsply; GIII: Excite - Ivoclar Vivadent) e o tipo de tratamento do substrato dentinário condicionado (a: água; b: clorexidina + água; c: etanol; d: clorexidina + etanol). Todos os dentes foram restaurados com resina Charisma na cor A2 (Heraeus - Kulzer, Germany) e submetidos a ensaio mecânico de microtração (EMIC DL-2000). O teste estatístico realizado foi ANOVA a um fator, completado com teste de Tukey. Resultado Os grupos GIIc, GIIIc e GIId apresentaram aumento significativo estatisticamente na resistência de união à microtração imediata. Conclusão Os diferentes tratamentos da dentina condicionada não afetaram de maneira negativa a resistência de união para todos os sistemas adesivos testados e a utilização da técnica com etanol, associado ou não à clorexidina, parece ser uma interessante abordagem quando associada a sistemas adesivos “condiciona-e-lava” de dois passos.
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Martini EC, Parreiras SO, Gutierrez MF, Loguercio AD, Reis A. Effect of Different Protocols in Preconditioning With EDTA in Sclerotic Dentin and Enamel Before Universal Adhesives Applied in Self-etch Mode. Oper Dent 2017; 42:284-296. [DOI: 10.2341/16-014-l] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives:
The aim of this study was to investigate the effect of different protocols of 17% ethylene diamine tetra-acetic acid (EDTA) conditioning on the etching pattern and immediate bond strength of universal adhesives to enamel and sclerotic dentin.
Methods and Materials:
Forty bovine teeth with sclerotic dentin and 20 human third molars were randomly divided into eight groups resulting from the combination of the main factors surface treatment (none, two-minute EDTA conditioning manual application, 30-second EDTA manual application, 30-second EDTA sonic application) and adhesives systems (Scotchbond Universal Adhesive [SBU] and Prime & Bond Elect [PBE]). Resin-dentin and enamel-dentin bond specimens were prepared and tested under the microtensile bond strength (μTBS) and microshear bond strength (μSBS) tests, respectively. The etching pattern produced on the unground enamel and the sclerotic dentin surfaces under the different protocols and adhesive systems was evaluated under scanning electron microscopy.
Results:
For enamel, only the main factor adhesive was significant (p<0.0001), with SBU showing the highest μSBS. In sclerotic dentin, the lowest mean was observed for the group without EDTA application and the highest mean in the group with EDTA application with the sonic device for 30 seconds. Regardless of the EDTA protocol, the highest means of μTBS were observed for SBU (p<0.05).
Conclusions:
EDTA conditioning improves the bonding performance of universal adhesives in the self-etch mode on sclerotic dentin, mainly when applied for 30 seconds with the aid of a sonic device. EDTA pretreatment also improves the retentive etching pattern of enamel, but it does not result in higher enamel bond strength.
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Affiliation(s)
- EC Martini
- Eveline Claudia Martini, DDS, graduate student, Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - SO Parreiras
- Sibelli Olivieri Parreiras, DDS, graduate student, Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - MF Gutierrez
- Mario Felipe Gutierrez, DDS, graduate student, Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil and professor, Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - AD Loguercio
- Alessandro Dourado Loguercio, DDS, MS, PhD, associate professor, Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - A Reis
- Alessandra Reis, DDS, PhD, associate professor, Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil
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Scheffel DL, Huck C, Soares DG, Basso FG, de Souza Costa CA, Brackett MG, Pashley DH, Hebling J. Uninfiltrated Collagen in Hybrid Layers produced after Reduced Acid-etching Time on Primary and Permanent Dentin. J Contemp Dent Pract 2016; 17:861-866. [PMID: 27794160 DOI: 10.5005/jp-journals-10024-1945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM This study evaluated the influence of acid-etching time on collagen exposure in adhesive interfaces established on primary and permanent dentin. MATERIALS AND METHODS Flat dentin surfaces were produced on sound primary molars and premolars (n = 8). The surfaces were divided into mesial and distal halves, and each half was etched with phosphoric acid for 5 or 15 seconds. The teeth were randomly allocated into two groups according to the adhesive system applied: Prime & Bond NT or Prime & Bond 2.1. After the adhesive application, the specimens were processed for Goldner's trichrome staining. The thickness of the uninfiltrated collagen zone (UCZ) in the hybrid layer was measured under optical microscopy. Data were analyzed by analysis of variance and Tukey tests (α = 0.05). RESULTS The thickness of UCZ was adhesive dependent. Within the same substrate, the specimens treated with Prime & Bond 2.1 presented thicker UCZ when etched for 15 seconds. Collagen exposure was significantly higher for the primary teeth etched for 5 seconds and treated with Prime & Bond 2.1. CONCLUSION The thickness of UCZ in hybrid layers is directly affected by acid-etching time and by the adhesive system applied. Primary dentin seems to be more susceptible to collagen exposure than is permanent dentin. CLINICAL SIGNIFICANCE Both acid-etching time and adhesive system can influence the amount of exposed collagen interfering on resin-dentin bond quality, especially on primary dentin.
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Affiliation(s)
- Débora Ls Scheffel
- Department of Orthodontics and Pediatric Dentistry Araraquara School of Dentistry, Universidade Estadual Paulista Araraquara, São Paulo, Brazil
| | - Cláudia Huck
- Department of Restorative Dentistry, Araraquara School of Dentistry, Universidade Estadual Paulista, Araraquara, São Paulo, Brazil
| | - Diana G Soares
- Department of Physiology and Pathology, Araraquara School of Dentistry, Universidade Estadual Paulista, Araraquara, São Paulo, Brazil
| | - Fernanda G Basso
- Department of Physiology and Pathology, Araraquara School of Dentistry, Universidade Estadual Paulista, Araraquara, São Paulo, Brazil
| | - Carlos A de Souza Costa
- Department of Physiology and Pathology, Araraquara School of Dentistry, Universidade Estadual Paulista, Araraquara, São Paulo, Brazil
| | - Martha G Brackett
- Department of Oral Rehabilitation, College of Dental Medicine Augusta University, Augusta, Georgia, USA
| | - David H Pashley
- Department of Oral Biology, College of Dental Medicine Augusta University, Augusta, Georgia, USA
| | - Josimeri Hebling
- Department of Orthodontics and Pediatric Dentistry Araraquara School of Dentistry, Universidade Estadual Paulista Araraquara, São Paulo, Brazil, Phone: +551633016334, e-mail:
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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]
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Cross-linked dry bonding: A new etch-and-rinse technique. Dent Mater 2016; 32:1124-32. [PMID: 27431091 DOI: 10.1016/j.dental.2016.06.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 03/16/2016] [Accepted: 06/22/2016] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To determine if acid-etched, cross-linked dentin can be dehydrated without lowering bond strength below that of cross-linked wet-bonded dentin in vitro. METHODS Using extracted human third molars, control acid-etched dentin was bonded with Single Bond Plus, using either the wet- or dry-bonding technique. Experimental acid-etched dentin was treated with 5mass% grape seed extract (GSE) in different solvents for 1min before undergoing wet vs dry resin-dentin bonding with Single Bond Plus. Completely demineralized dentin beams were treated with 5% GSE for 0, 1 or 10min, before measuring stiffness by 3-point flexure. Other completely demineralized beams were treated similarly and then incubated in buffer for 1 week to measure the collagen solubilization by endogenous dentin proteases. RESULTS 24h microtensile bond strengths (μTBS) in wet and dry controls were 53.5±3.6 and 9.4±1.8MPa, respectively (p<0.05). 5% GSE in water gave μTBS of 53.7±3.4 and 39.1±9.7MPa (p<0.05), respectively, while 5% GSE in ethanol gave μTBS of 51.2±2.3 and 35.3±2.0MPa (p<0.05). 5% GSE in 5% EtOH/95% water gave wet and dry μTBS of 53.0±2.3 and 55.7±5.1MPa (p>0.05). Cross-linking demineralized dentin with 5% GSE increased stiffness of dentin and decreased collagen degradation (p<0.05). SIGNIFICANCE 5% GSE pretreatment of acid-etched dentin for 1min permits the dentin to be completely air-dried without lowering bond strength.
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Simões TC, Luque-Martinez ÍV, Moraes RR, Sá ATG, Loguercio AD, Moura SK. Longevity of Bonding of Self-adhesive Resin Cement to Dentin. Oper Dent 2016; 41:E64-72. [DOI: 10.2341/14-266-lr] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objective: To evaluate the effect of root dentin treatment on the bonding of self-adhesive resin cement after 24 hours and after 6 months.
Methods: A total of 48 single-rooted premolars were endodontically treated and divided into four groups (n=12): Adper Scotchbond Multi-Purpose + RelyX ARC (ARC); RelyX U200 (U200); EDTA + RelyX U200 (EU200); and phosphoric acid (H3PO4) + RelyX U200 (HU200). After filling the roots, an Exacto No. 2 fiber post was cleaned, treated with silane (60 seconds), positioned, and light cured (LED; 60 seconds at 1200 mW/cm2). After storage (37°C/24 h), the roots were cut to obtain two discs (1 mm) of each third. They were stored in distilled water (24 hours at 37°C); one disc of each root-third was subjected to the push-out test (0.5 mm/min) at 24 hours and the other disc after six months of water storage (37°C). The data on the root-thirds were averaged for statistical purposes. The average values of bond strength (MPa) were analyzed by two-way analysis of variance and post hoc Student-Newman-Keuls (5%).
Results: There were statistical differences for the treatment of dentin (p<0.001), for time (p=0.003), and the interaction of treatment and time (p=0.017). After 24 hours, we observed lower bond strength in the HU200 group when compared with other groups (ARC, U200, and EU200). After six months, HU200 showed the lowest bond strength. Higher strengths were observed for EU200 and U200 similarly, which were higher than ARC.
Conclusion: The bonding of the self-adhesive resin cement varied over time in the tested groups.
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Affiliation(s)
- TC Simões
- Tânia Christina Simões, DDS, MS, PhD, Restorative Dentistry, University North of Paraná, Londrina, Brazil
| | - ÍV Luque-Martinez
- Issis Virgínia Luque-Martinez, Dentistry Academic Unit, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - RR Moraes
- Rafael R de Moraes, DDS, MS, PhD, professor, Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - ATG Sá
- André Tomazini Gomes de Sá, PhD, professor, Prosthodontics, Federal Institute of Paraná, Londrina, Brazil
| | - AD Loguercio
- Alessandro D Loguercio, DDS, MS, PhD, professor, Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil
| | - SK Moura
- Sandra Kiss Moura, DDS, MDS, PhD, professor, Restorative Dentistry, University North of Paraná, Londrina, Brazil
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Antibacterial properties of copper iodide-doped glass ionomer-based materials and effect of copper iodide nanoparticles on collagen degradation. Clin Oral Investig 2016; 21:369-379. [DOI: 10.1007/s00784-016-1799-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Accepted: 03/14/2016] [Indexed: 10/22/2022]
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45
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On the stiffness of demineralized dentin matrices. Dent Mater 2015; 32:161-70. [PMID: 26747822 DOI: 10.1016/j.dental.2015.11.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 11/17/2015] [Accepted: 11/30/2015] [Indexed: 01/29/2023]
Abstract
UNLABELLED Resin bonding to dentin requires the use of self-etching primers or acid etching to decalcify the surface and expose a layer of collagen fibrils of the dentin matrix. Acid-etching reduces the stiffness of demineralized dentin from approximately 19 GPa-1 MPa, requiring that it floats in water to prevent it from collapsing during bonding procedures. Several publications show that crosslinking agents like gluteraladehyde, carbodiimide or grape seed extract can stiffen collagen and improve resin-dentin bond strength. OBJECTIVE The objective was to assess a new approach for evaluating the changes in stiffness of decalcified dentin by polar solvents and a collagen cross-linker. METHODS Fully demineralized dentin beams and sections of etched coronal dentin were subjected to indentation loading using a cylindrical flat indenter in water, and after treatment with ethanol or ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC). The stiffness was measured as a function of strain and as a function of loading rate from 1 to 50 μm/s. RESULTS At a strain of 0.25% the elastic modulus of the fully demineralized dentin was approximately 0.20 MPa. It increased to over 0.90 MPa at strains of 1%. Exposure to ethanol caused an increase in elastic modulus of up to four times. Increasing the loading rate from 1 to 50 μm/s caused an increase in the apparent modulus of up to three times in both water and ethanol. EDC treatment caused increases in the stiffness in fully demineralized samples and in acid-etched demineralized dentin surfaces in situ. SIGNIFICANCE Changes in the mechanical behavior of demineralized collagen matrices can be measured effectively under hydration via indentation with cylindrical flat indenters. This approach can be used for quantifying the effects of bonding treatments on the properties of decalcified dentin after acid etching, as well as to follow the loss of stiffness over time due to enzymatic degradation.
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Seseogullari-Dirihan R, Tjäderhane L, Pashley DH, Tezvergil-Mutluay A. Effect of ultraviolet A-induced crosslinking on dentin collagen matrix. Dent Mater 2015; 31:1225-31. [PMID: 26314255 DOI: 10.1016/j.dental.2015.08.145] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 05/08/2015] [Accepted: 08/04/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the effect of using UVA-induced crosslinking with or without riboflavin as photosensitizers on degradation of dentin matrix by dentin proteases. METHODS Demineralized dentin specimens (0.4×3×6 mm(3), n=10/group) were subjected to: (RP1), 0.1% riboflavin-5 phosphate/UVA for 1 min; (RP5), 0.1% riboflavin-5 phosphate/UVA for 5 min; (R1), 0.1% riboflavin/UVA for 1 min; (R5), 0.1% riboflavin-UVA for 5 min; (UV1), UVA for 1 min; (UV5), UVA for 5 min. Specimens were incubated in 1 mL zinc and calcium containing media for 1 day and 1 week. An untreated group served as control (CM). After incubation, the loss of dry mass of samples was measured and aliquots of media were analyzed for the release of C-terminal fragment telopeptide (ICTP vs. CTX) of collagen to evaluate for cathepsin K (CA-K) and total matrix metalloproteinase (MMP)-mediated degradation. Data were analyzed using repeated measures ANOVA at α=0.05. RESULTS Although UVA radiation alone reduced dentin degradation, UVA-activated riboflavin or riboflavin-5 phosphate inhibited MMP and CA-K activities more than UVA alone. The effects of crosslinking were more pronounced in 7-day samples; only with CA-K were the effects of crosslinking with or without photosensitizer significantly different from controls in 1-day samples. SIGNIFICANCE The use of bioactive forms (RP) or longer treatment time did not result with better effect. The use of UVA crosslinking reduces dentin matrix degradation, especially with photosensitizers.
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Affiliation(s)
- Roda Seseogullari-Dirihan
- Finnish Doctoral Program in Oral Sciences (FINDOS), University of Turku, Institute of Dentistry, Turku, Finland; Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland.
| | - Leo Tjäderhane
- Institute of Dentistry, University of Oulu, and Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland; Department of Oral and Maxillofacial Diseases, University of Helsinki, and Helsinki University Hospital, Helsinki, Finland
| | - David H Pashley
- School of Dentistry, Georgia Regents University, Augusta, GA, USA
| | - Arzu Tezvergil-Mutluay
- Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland; Institute of Dentistry, University of Turku, Turku University Hospital, TYKS, University of Turku, Kiinamyllynkatu 4-8, 20520, Turku, Finland
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Li H, Li T, Li X, Zhang Z, Li P, Li Z. Morphological effects of MMPs inhibitors on the dentin bonding. Int J Clin Exp Med 2015; 8:10793-10803. [PMID: 26379873 PMCID: PMC4565256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 06/21/2015] [Indexed: 06/05/2023]
Abstract
Matrix metalloproteinases (MMPs) have been studied extensively, and MMP inhibitors have been used as dental pretreatment agents prior to dentin bonding because they reduce collagen fiber degradation and improve bonding strength. However, morphologic characteristics of the collagen network after etching and of the post-adhesive dentin hybrid layers (DHL) after MMP inhibitors pretreatment have not been evaluated. Thus, we investigated demineralized dentin pretreated with chlorhexidine (CHX) and minocycline (MI) in an etch- and -rinse adhesive system with field emission scanning electron microscopy (FESEM) and immuno-gold labeling markers to observe the collagen network and DHL. FESEM revealed after CHX and MI, a demineralized dentin surface and improved collagen network formation, reduced collagen degradation, and distinct gold-labeling signals. Applying adhesive after either MMP inhibitor created a better dentin interface as evidenced by immuno-gold staining, better adhesive penetration, and higher DHL quality. With microtensile bond strength tests (µTBS) we estimated bonding strength using µTBS data. Immediate µTBS was enhanced with MMP inhibitor application to the bonding surface, and the CHX group was significantly different than non-treated etched surfaces, but no significant change was detected in the MI group. Surface micromorphology of the fractured dentin resin restoration showed that the CHX group had a better resin and dentin tube combination. Both MMP inhibitors created uniform resin coverage. Thus, morphologic results and µTBS data suggest that CHX and MI can inhibit MMP activity, improve immediate bonding strength, and enhance dentin bonding stability with an etch- and -rinse adhesive system.
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Affiliation(s)
- He Li
- Department of Hospital of Stomatology, Jilin University Changchun, China
| | - Tianbo Li
- Department of Hospital of Stomatology, Jilin University Changchun, China
| | - Xiuying Li
- Department of Hospital of Stomatology, Jilin University Changchun, China
| | - Zhimin Zhang
- Department of Hospital of Stomatology, Jilin University Changchun, China
| | - Penglian Li
- Department of Hospital of Stomatology, Jilin University Changchun, China
| | - Zhenling Li
- Department of Hospital of Stomatology, Jilin University Changchun, China
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CRUZ JB, BONINI G, LENZI TL, IMPARATO JCP, RAGGIO DP. Bonding stability of adhesive systems to eroded dentin. Braz Oral Res 2015; 29:S1806-83242015000100284. [DOI: 10.1590/1807-3107bor-2015.vol29.0088] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 03/14/2015] [Indexed: 11/22/2022] Open
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Brackett MG, Agee KA, Brackett WW, Key WO, Sabatini C, Kato MT, Buzalaf MA, Tjäderhane L, Pashley DH. Effect of Sodium Fluoride on the endogenous MMP Activity of Dentin Matrices. JOURNAL OF NATURE AND SCIENCE 2015; 1:e118. [PMID: 26052548 PMCID: PMC4457332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES This study evaluated the effect of incorporating increasing concentrations of sodium fluoride in incubation media, on the loss of dry mass and solubilization of collagen from demineralized dentin beams incubated for up to 7 days. The effect of fluoride on the inhibition of matrix-bound metalloproteinases (MMPs) was also measured. METHODS Dentin beams were completely demineralized in 10% phosphoric acid. After baseline measurements of dry mass, the beams were divided into six groups (n=10) and incubated at 37°C either in buffered media containing sodium fluoride (NaF) at 75, 150, 300, 450, 600 ppm or in fluoride-free media (control) for seven days. Following incubation, dry mass was re-measured. The incubation media was hydrolyzed with HCl for the quantitation of hydroxyproline (HYP) as an index of solubilization of collagen by endogenous dentin proteases. Increasing concentrations of fluoride were also evaluated for their ability to inhibit rhMMP-9. RESULTS Addition of NaF to the incubation media produced a progressive significant reduction (p<0.05) in the loss of mass of dentin matrices, with all concentrations demonstrating significantly less mass loss than the control group. Significantly less HYP release from the dentin beams was found in the higher fluoride concentration groups, while fluoride concentrations of 75 and 150 ppm significantly reduced rhMMP-9 activity by 6.5% and 79.2%, respectively. CONCLUSIONS The results of this study indicate that NaF inhibits matrix-bound MMPs and therefore may slow the degradation of dentin matrix by endogenous dentin MMPs.
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Affiliation(s)
- Martha Goël Brackett
- Department of Oral Rehabilitation, Georgia Regents University, College of Dental Medicine, Augusta, GA, USA
| | - Kelli A. Agee
- Department of Oral Biology, Georgia Regents University, College of Dental Medicine, Augusta, GA, USA
| | - William W. Brackett
- Department of Oral Rehabilitation, Georgia Regents University, College of Dental Medicine, Augusta, GA, USA
| | - William O. Key
- Department of Oral Rehabilitation, Georgia Regents University, College of Dental Medicine, Augusta, GA, USA
| | - Camila Sabatini
- Department of Restorative Dentistry, School of Dental Medicine, Buffalo, Buffalo, NY, USA
| | - Melissa T. Kato
- Department of Biological Sciences, Bauru School of Dentistry, USP University of São Paulo, Bauru, SP, Brazil
| | - Marilia A.R. Buzalaf
- Department of Biological Sciences, Bauru School of Dentistry, USP University of São Paulo, Bauru, SP, Brazil
| | - Leo Tjäderhane
- Institute of Dentistry, University of Oulu and Oulu University Hospital, Oulu, Finland; and Institute of Dentistry, University of Turku, Turku, Finland
| | - David H. Pashley
- Department of Oral Biology, Georgia Regents University, College of Dental Medicine, Augusta, GA, USA
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Seseogullari-Dirihan R, Mutluay MM, Vallittu P, Pashley DH, Tezvergil-Mutluay A. Effect of pretreatment with collagen crosslinkers on dentin protease activity. Dent Mater 2015; 31:941-7. [PMID: 26037790 DOI: 10.1016/j.dental.2015.05.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 05/07/2015] [Indexed: 11/30/2022]
Abstract
OBJECTIVES This study evaluated the effect of dentin pretreatment with collagen crosslinkers on matrix metalloproteinase (MMP) and cathepsin K mediated collagen degradation. METHODS Dentin beams (1mm×2mm×6mm) were demineralized in 10% H3PO4 for 24h. After baseline measurements of dry mass, beams were divided into 11 groups (n=10/group) and, were pretreated for 5min with 1% glutaraldehyde (GA); 5% GA; 1% grape-seed extract (GS); 5% GS; 10% sumac (S); 20μM curcumin (CR); 200μM CR; 0.l% riboflavin/UV (R); 0.5% R; 0.1% riboflavin-5-phosphate/UV (RP); and control (no pretreatment). After pretreatment, the beams were blot-dried and incubated in 1mL calcium and zinc-containing medium (CM, pH 7.2) at 37°C for 3, 7 or 14 days. After incubation, dry mass was reassessed and aliquots of the incubation media were analyzed for collagen C-telopeptides, ICTP and CTX using specific ELISA kits. Data were analyzed by repeated-measures ANOVA. RESULTS The rate of dry mass loss was significantly different among test groups (p<0.05). The lowest 14 day mean dry mass loss was 6.98%±1.99 in the 200μM curcumin group compared to control loss of dry mass at 32.59%±5.62, p<0.05, at 14 days. The ICTP release over the incubation period (ng/mg dry dentin) ranged between 1.8±0.51 and 31.8±1.8. CTX release from demineralized beams pretreated with crosslinkers was significantly lower than CM (5.7±0.2ng/mg dry dentin). SIGNIFICANCE The results of this study indicate that collagen crosslinkers tested in this study are good inhibitors of cathepsin K activity in dentin. However, their inhibitory effect on MMP activity was highly variable.
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Affiliation(s)
- R Seseogullari-Dirihan
- Finnish Doctoral Program in Oral Sciences (FINDOS) University of Turku, Institute of Dentistry, Turku, Finland; Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland.
| | - M M Mutluay
- Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland; Department of Restorative Dentistry and Endodontics, Institute of Dentistry, Turku, Finland
| | - P Vallittu
- Department of Biomaterials University of Turku, Institute of Dentistry, Turku, Finland
| | - D H Pashley
- School of Dentistry, Georgia Regents University, Augusta, GA, USA
| | - A Tezvergil-Mutluay
- Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland; Department of Restorative Dentistry and Endodontics, Institute of Dentistry, Turku, Finland; Turku University Hospital, TYKS, University of Turku, Turku, Finland
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