Journal article
Degradation of Adhesive-Dentin Interfaces Created Using Different Bonding Strategies after Five-year Simulated Pulpal Pressure
The journal of adhesive dentistry, Vol.21(3), pp.199-207
2019
DOI: 10.3290/j.jad.a42510
PMID: 31093617
Abstract
Purpose: To compare after five-year simulated pulpal pressure (SPP) the degradation of adhesive-dentin interfaces created using two simplified adhesives applied with different bonding strategies.
Materials and Methods: A two-step self-etch (CSE: Clearfil SE Bond) adhesive was used as a control multistep adhesive. The tested experimental materials were two simplified adhesives, a one-step self-etch (CS3: Clearfil S3 Bond) and a self-priming etch-and-rinse adhesive (SB2: Adper Single-Bond 2). Half of the bonded specimens were submitted to microtensile bond strength (mu TBS) testing after 24 h. The other half submitted to SPP for five years before mu TBS testing. Nonfractured sticks were evaluated using transmission electron microscopy (TEM). Scanning electron microscopy (SEM) was used to evaluate silver-nitrate nanoleakage within the interface. Data were statistically analyzed by two-way ANOVA and Tukey's test (p < 0.05).
Results: Prolonged SPP induced bond-strength reduction for both SB2 and CS3. All bonding approaches showed increased nanoleakage after aging. The two simplified adhesives showed severe degradation at the resin-dentin interface. TEM revealed that the main degradation patterns for the etch-and-rinse adhesive SB2 was collagen breakdown, while polymer hydrolysis along with filler debonding was mainly observed in CS3.
Conclusions: Simplified adhesives applied in etch-and-rinse mode are mainly characterized by hydrolysis and collagen degradation. In self-etch mode, simplified adhesives may principally show hydrolysis of the polymeric matrix and/or at the interface of fillers and coupling agent. The use of multistep self-etching adhesives may guarantee greater dentin bond durability compared to simplified adhesives.
Details
- Title: Subtitle
- Degradation of Adhesive-Dentin Interfaces Created Using Different Bonding Strategies after Five-year Simulated Pulpal Pressure
- Creators
- Victor P. Feitosa - Univ Fed Ceara, Postgrad Program Dent, Dept Restorat Dent, Fortaleza, Ceara, BrazilSalvatore Sauro - CEU Carden Herrera Univ, Dept Odontol, Fac Ciencias Salud, Valencia, SpainWalter Zenobi - Univ Fed Ceara, Postgrad Program Dent, Dept Restorat Dent, Fortaleza, Ceara, BrazilJulianne C. Silva - Univ Fed Ceara, Postgrad Program Dent, Dept Restorat Dent, Fortaleza, Ceara, BrazilGabriel Abuna - Univ Estadual Campinas, Piracicaba Dent Sch, Piracicaba, BrazilBart Van Meerbeek - KU LeuvenMario A. C. Sinhoreti - Univ Estadual Campinas, Piracicaba Dent Sch, Piracicaba, BrazilAmerico B. Correr - Univ Estadual Campinas, Piracicaba Dent Sch, Piracicaba, BrazilKumiko Yoshihara - Okayama University
- Resource Type
- Journal article
- Publication Details
- The journal of adhesive dentistry, Vol.21(3), pp.199-207
- Publisher
- Quintessence Publishing Co Inc
- DOI
- 10.3290/j.jad.a42510
- PMID
- 31093617
- ISSN
- 1461-5185
- eISSN
- 1757-9988
- Number of pages
- 9
- Language
- English
- Date published
- 2019
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984654471202771
Metrics
3 Record Views