Journal article
Hydrolytic degradation of the resin-dentine interface induced by the simulated pulpal pressure, direct and indirect water ageing
Journal of dentistry, Vol.40(12), pp.1134-1143
12/01/2012
DOI: 10.1016/j.jdent.2012.09.011
PMID: 23000523
Abstract
Objectives: The aim of this study was to compare the hydrolytic effects induced by simulated pulpal pressure, direct or indirect water exposure within the resin-dentine interfaces created with three "simplified'' resin bonding systems (RBSs).
Methods: A two-step/self-etching (CSE: Clearfil SE Bond), one-step/self-etching (S3: Clearfil S3) and etch-and-rinse/self-priming (SB: Single-bond 2) adhesives were applied onto dentine and submitted to three different prolonged (6 or 12 months) ageing strategies: (i) Simulated Pulpal Pressure (SPP); (ii) Indirect Water Exposure (IWE: intact bonded-teeth); (iii) Direct Water Exposure (DWE: resin-dentine sticks). Control and aged specimens were submitted to microtensile bond strength (mu TBS) and nanoleakage evaluation. Water sorption (WS) survey was also performed on resin disks. Results were analysed with two-way ANOVA and Tukey's test (p < 0.05).
Results: The mu TBS of CS3 and SB dropped significantly (p < 0.05) after 6 months of SPP and DWE. CSE showed a significant mu TBS reduction only after 12 months of DWE (p = 0.038). IWE promoted no statistical change in mu TBS (p > 0.05) and no evident change in nanoleakage. Conversely, SPP induced a clear formation of "water-trees'' in CS3 and SB. WS outcomes were CS3 > SB = CSE.
Conclusion: The hydrolytic degradation of resin-dentine interfaces depend upon the type of the in vitro ageing strategy employed in the experimental design. Direct water exposure remains the quickest method to age the resin-dentine bonds. However, the use of SPP may better simulate the in vivo scenario. However, the application of a separate hydrophobic solvent-free adhesive layer may reduce the hydrolytic degradation and increase the longevity of resin-dentine interfaces created with simplified adhesives. (C) 2012 Elsevier Ltd. All rights reserved.
Details
- Title: Subtitle
- Hydrolytic degradation of the resin-dentine interface induced by the simulated pulpal pressure, direct and indirect water ageing
- Creators
- Victor P. Feitosa - Universidade Estadual de Campinas (UNICAMP)Ariene A. Leme - Universidade Estadual de Campinas (UNICAMP)Salvatore Sauro - St Thomas' HospitalLourenco Correr-Sobrinho - Universidade Estadual de Campinas (UNICAMP)Timothy F. Watson - St Thomas' HospitalMario A. Sinhoreti - Universidade Estadual de Campinas (UNICAMP)Americo B. Correr - Universidade Estadual de Campinas (UNICAMP)
- Resource Type
- Journal article
- Publication Details
- Journal of dentistry, Vol.40(12), pp.1134-1143
- DOI
- 10.1016/j.jdent.2012.09.011
- PMID
- 23000523
- NLM abbreviation
- J Dent
- ISSN
- 0300-5712
- eISSN
- 1879-176X
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- Wellcome Trust; European Commission II-3A-1109-10046 / National Institute for Health Research; National Institute for Health Research (NIHR) National Institute for Health Research under the Comprehensive Biomedical Research Centre at Guy's & St. Thomas' Trust Capes-Brazil; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) Centre of Excellence in Medical Engineering
- Language
- English
- Date published
- 12/01/2012
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984367747002771
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