Journal article
Evaluation of the micro-mechanical strength of resin bonded-dentin interfaces submitted to short-term degradation strategies
Journal of the mechanical behavior of biomedical materials, Vol.15, pp.112-120
11/01/2012
DOI: 10.1016/j.jmbbm.2012.06.010
PMID: 23032431
Abstract
The aim of this study was to evaluate the microtensile bond strength ([mu TBS) and confocal micropermeability of resin bonded-dentin specimens created using two representative two-step/self-etch adhesives submitted to short-term period degradation strategies such as simulated pulpal pressure, thermo- or mechanical-cycling challenges. Clearfil SE Bond (CSE) and Silorane adhesive (SIL) were bonded to flat deep dentin from seventy extracted human molars and light-cured for 10 s. Composite build-ups were constructed using with Filtek Z350 XT and Filtek P90 respectively. The specimens of each adhesive group were subjected to three different accelerated aging methods: (1) thermo-cycling challenge (5000 cycles); (2) mechanical-cycling load (200,000 cycles); (3) experiment and (4) conventional method for simulated pulpal pressure (20 cm H2O). Control resin-bonded specimens were stored in distilled water for 24 h. mu TBS and confocal microscopy (CLSM) micropermeability evaluation were performed and the results were analyzed using Two-way ANOVA and Tukey's tests (alpha=0.05). The CLSM evaluation revealed micro-cracks within the Silorane-bonded dentin subsequent to mechanical-cycling load, whereas, the simulated pulpal pressure induced evident micropermeability in both bonding agents. Mechanical loading provides discernible bonding degradation in a short-term period in resin-bonded dentin created using two-step/self-etch adhesives. However, simulated pulpal pressure may reduce the sealing ability of self-etch adhesives causing greater water uptake within the resin-dentin interface. (c) 2012 Elsevier Ltd. All rights reserved.
Details
- Title: Subtitle
- Evaluation of the micro-mechanical strength of resin bonded-dentin interfaces submitted to short-term degradation strategies
- Creators
- Victor P. Feitosa - Universidade Estadual de Campinas (UNICAMP)Salvatore Sauro - King's College LondonTimothy F. Watson - St Thomas' HospitalAmerico B. Correr - Universidade Estadual de Campinas (UNICAMP)Raquel Osorio - Universidad de GranadaManuel Toledano - Universidad de GranadaLourenco Correr-Sobrinho - Univ Estadual Campinas, Dept Restorat Dent, Dent Mat Div, Piracicaba Dent Sch, BR-13414903 Piracicaba, BrazilMario Alexandre C. Sinhoreti - Universidade Estadual de Campinas (UNICAMP)
- Resource Type
- Journal article
- Publication Details
- Journal of the mechanical behavior of biomedical materials, Vol.15, pp.112-120
- Publisher
- Elsevier
- DOI
- 10.1016/j.jmbbm.2012.06.010
- PMID
- 23032431
- ISSN
- 1751-6161
- eISSN
- 1878-0180
- Number of pages
- 9
- Grant note
- Center of Excellence in Medical Engineering Wellcome trust; Wellcome Trust National Institute for Health Research (NIHR); National Institutes of Health Research (NIHR) II-3A-1109-10046 / National Institute for Health Research; National Institutes of Health Research (NIHR) CAPES-Brazil; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Language
- English
- Date published
- 11/01/2012
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984655345002771
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