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[Microleakage in class V cavities restored with esthetic materials, using different restorative techniques]
E M Russo1, R C de Carvalho, E Matson
1Departamento de Dentistica da Faculdade de Odontologia da USP.
Pesquisa Odontologica Brasileira = Brazilian Oral Research
|November 14, 2001
Summary
Polyacid-modified resin composite (PAMRC) showed the highest microleakage in Class V cavities, especially without acid etching. Composite resin (CR) demonstrated lower gingival margin leakage compared to PAMRC and resin-modified glass ionomer cement (RMGIC).
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Biomaterials
Context:
- Microleakage is a significant concern in dental restorations, potentially leading to secondary caries and pulpal issues.
- Class V cavities present unique challenges due to their location at the gingival margin, often involving both enamel and dentin.
- Evaluating the performance of different restorative materials and clinical procedures is crucial for improving restoration longevity.
Purpose:
- To compare the microleakage of Class V cavities restored with composite resin (CR), resin-modified glass ionomer cement (RMGIC), and polyacid-modified resin composite (PAMRC).
- To assess the influence of different clinical procedures, specifically acid etching, on the microleakage of these materials.
Summary:
- Thirty-six human molars underwent Class V cavity preparation. Restorations were placed using CR, RMGIC, and PAMRC, with some groups omitting acid etching.
- Specimens were subjected to storage, occlusal loading, and thermocycling before dye penetration assessment using rhodamine B.
- Kruskal-Wallis analysis indicated significant differences (p < 0.05). PAMRC without acid etching exhibited the highest leakage. CR showed less leakage at the gingival margin than PAMRC and RMGIC. Acid etching reduced microleakage for PAMRC.
Impact:
- Findings highlight the importance of proper surface preparation, including acid etching, for reducing microleakage in PAMRC restorations.
- Composite resin may offer superior marginal integrity at the gingival margin compared to PAMRC and RMGIC under certain conditions.
- This research provides valuable data for clinicians selecting restorative materials and techniques for Class V cavities to minimize marginal leakage and enhance clinical outcomes.