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Bonding stability of adhesive systems to eroded dentin
Janaina Barros Cruz1, Gabriela Bonini1, Tathiane Larissa Lenzi2
1Centro de Pesquisas Odontológicas, School of Dentistry, Faculdade São Leopoldo Mandic, Campinas, SP, Brazil.
Brazilian Oral Research
|July 9, 2015
Summary
Eroded dentin significantly reduces the bond strength of dental adhesives over time. This study found that microshear bond strength (µSBS) decreased after 6 months, especially in eroded dentin, regardless of the adhesive system used.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials Research
Background:
- Dental erosion is a growing concern, potentially affecting the longevity of dental restorations.
- The bond strength of adhesive systems to eroded dentin is not fully understood.
- Understanding the impact of erosion on dentin bonding is crucial for clinical success.
Purpose of the Study:
- To evaluate the immediate and 6-month microshear bond strength (µSBS) of different adhesive systems to sound and eroded dentin.
- To compare the performance of etch-and-rinse, two-step self-etch, and one-step self-etch adhesives on compromised dentin.
- To assess the effect of aging on the bond durability of these systems.
Main Methods:
- An in vitro study using bovine incisors subjected to an erosive challenge (Sprite Light®) or artificial saliva.
- Application of three different adhesive systems (Adper Single Bond, Clearfil SE Bond, Adper Easy One) followed by resin composite restoration.
- Microshear bond strength (µSBS) testing after 24 hours and 6 months of water storage.
- Stereomicroscopic evaluation of failure modes.
Main Results:
- A significant reduction in µSBS was observed after 6 months of water aging for all tested adhesive systems.
- Eroded dentin exhibited lower µSBS values compared to sound dentin.
- No significant differences in bonding effectiveness were found among the evaluated adhesive systems.
- Adhesive or mixed failure modes predominated across all groups.
Conclusions:
- Eroded dentin compromises the long-term bonding quality of contemporary adhesive systems.
- Dental professionals should consider the potential impact of erosion on restorative treatment outcomes.
- Further research may explore protective strategies or alternative bonding protocols for eroded tooth structures.
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