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Microleakage of a packable composite associated with different materials
Alessandro Dourado Loguercio1, José Roberto de Oliveira Bauer, Alessandra Reis
1Department of Dental Materials, Dental School, University of São Paulo, São Paulo, Brazil. ale@fo.usp.br
The Journal of Clinical Dentistry
|March 13, 2002
Summary
This study found that using Fuji II LC as a base material significantly reduced marginal leakage in class II composite restorations. Other material combinations showed similar, higher levels of microleakage, indicating Fuji II LC offers superior gingival margin sealing.
Area of Science:
- Restorative Dentistry
- Dental Materials Science
- Microleakage Analysis
Background:
- Class II composite resin restorations are prone to marginal leakage, potentially leading to secondary caries.
- Different layering techniques and base materials may influence the sealing ability of these restorations.
- Evaluating microleakage is crucial for assessing the clinical longevity of dental restorations.
Purpose of the Study:
- To compare the marginal microleakage of class II composite restorations using various material combinations.
- To determine if using Fuji II LC as a base material impacts gingival margin sealing.
- To assess the effectiveness of different flowable composites as liners beneath a final composite restoration.
Main Methods:
- In vitro evaluation of marginal leakage in 20 extracted molars with standardized class II cavities.
- Restorations were placed using five different material groups, including combinations with Prime & Bond NT, Surefil, Dyract Flow, Flow-it, Dyract AP, and Fuji II LC.
- Specimens underwent thermocycling and methylene blue dye immersion, followed by stereomicroscopic evaluation of dye penetration at the gingival margin.
Main Results:
- All tested material combinations exhibited some degree of dye penetration, indicating no complete seal.
- Groups 1-4 (Prime & Bond NT with Surefil, Dyract Flow + Surefil, Flow-it + Surefil, Dyract AP + Surefil) showed statistically similar levels of marginal leakage.
- Group 5 (Fuji II LC + Prime & Bond NT + Surefil) demonstrated significantly lower dye penetration compared to the other groups.
Conclusions:
- The use of Fuji II LC as a base material resulted in the lowest degree of microleakage at the gingival margin.
- Fuji II LC appears to provide superior sealing properties for class II composite restorations compared to the other tested combinations.
- Further clinical studies are warranted to confirm these in vitro findings regarding restoration longevity and effectiveness.