Journal article
Prolonged Curing Time Reduces the Effects of Simulated Pulpal Pressure on the Bond Strength of One-step Self-etch Adhesives
Operative dentistry, Vol.38(5), pp.545-554
09/01/2013
DOI: 10.2341/12-180-L
PMID: 23215642
Abstract
The aim of this study was to evaluate the effects of extended light-curing procedures on the microtensile bond strength (mu TBS) of onestep self-etch adhesives (1-SEAs) submitted to simulated pulpal pressure. Coronal deep-den-tin specimens were bonded using Clearfil S3 Bond (S3), Adper Easy Bond (EB), or G-Bond Plus (GB) following the manufacturers' recommendations and light-cured for 10 seconds or 40 seconds. The dentin-bonded specimens were stored in distilled water for 24 hours without pulpal pressure (control) or submitted to 20 cm H2O simulated pulpal pressure for 24 hours. The specimens were cut into matchsticks and subjected to mu TBS testing. The data were statistically analyzed using the three-way analysis of variance and Tukey's tests (p<0.05). Debonded sticks were investigated through scanning electron microscopy. EB obtained higher bond strengths than GB and S3. However, prolonged light activation (40 seconds) provided higher mu TBS for all adhesives when submitted to pulpal pressure. Conversely, pulpal pressure caused a drop in mu TBS in EB and S3 when light-cured for 10 seconds. A mixed failure mode was mainly attained for the control groups, whereas the specimens submitted to pulpal pressure failed in the adhesive mode. The mu TBS of GB was not affected by pulpal pressure when light-cured for 10 seconds. Adhesive was the most prevalent failure mode, except when light-cured for 40 seconds, which showed predominantly cohesive failure. Extended curing times improved the resistance of 1-SEAs to simulated pulpal pressure.
Details
- Title: Subtitle
- Prolonged Curing Time Reduces the Effects of Simulated Pulpal Pressure on the Bond Strength of One-step Self-etch Adhesives
- Creators
- V. P. Feitosa - Universidade Estadual de Campinas (UNICAMP)T. F. Watson - Kings Coll London, Inst Dent, London, EnglandR. P. Vitti - Universidade Estadual de Campinas (UNICAMP)A. Bacchi - Universidade Estadual de Campinas (UNICAMP)L. Correr-Sobrinho - Univ Estadual Campinas, Piracicaba Dent Sch, Dept Restorat Dent, Div Dent Mat, BR-13414903 Piracicaba, SP, BrazilA. B. Correr - Universidade Estadual de Campinas (UNICAMP)M. A. C. Sinhoreti - Universidade Estadual de Campinas (UNICAMP)S. Sauro - King's College London
- Resource Type
- Journal article
- Publication Details
- Operative dentistry, Vol.38(5), pp.545-554
- Publisher
- Operative Dentistry Inc
- DOI
- 10.2341/12-180-L
- PMID
- 23215642
- ISSN
- 0361-7734
- eISSN
- 1559-2863
- Number of pages
- 10
- Grant note
- II-3A-1109-10046 / National Institute for Health Research; National Institute for Health Research (NIHR) CAPES; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Language
- English
- Date published
- 09/01/2013
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984654466502771
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