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Dentine deproteinization and microleakage around gingival third resin restorations
Journal of Conservative Dentistry : JCD
|February 10, 2010
Summary
Deproteinization of dentine may reduce microleakage with acetone-based adhesives, but its effect is less significant with ethanol or water-based systems. This finding is crucial for improving resin restoration longevity.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Restorative Dentistry
Background:
- Satisfactory adhesion of restorative resins to dentine is crucial for restoration longevity.
- Dentine surface treatment methods significantly influence the success of adhesive bonding.
- Microleakage around resin restorations is a primary cause of secondary caries and restoration failure.
Purpose of the Study:
- To evaluate the impact of deproteinization on microleakage in gingival third resin restorations.
- To compare the efficacy of different dentine surface treatments and bonding systems on microleakage.
- To determine the role of collagen removal in mitigating microleakage around dental restorations.
Main Methods:
- Standardized Class V preparations were made on human molars.
- Dentine surfaces were subjected to five treatment variations: no treatment, enamel etch only, total etch, total etch with deproteinization, and deproteinization only.
- Adhesive bonding was performed using acetone- or ethanol-based bonding systems.
- Microleakage was quantified using methylene blue dye and spectrophotometry.
Main Results:
- Statistically significant differences in microleakage were observed across all treatment groups and bonding systems.
- The total etch and total etch with deproteinization groups showed significant differences compared to other groups.
- While total etch alone decreased microleakage, the difference was not statistically significant compared to total etch with deproteinization.
Conclusions:
- Collagen removal through deproteinization may be beneficial in reducing microleakage with acetone-based adhesive systems.
- Deproteinization appears to have a negligible effect on microleakage when using ethanol or water-based adhesive systems.
- Optimizing dentine surface treatment is essential for minimizing microleakage and enhancing the clinical performance of resin restorations.
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