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A combined amalgam and composite resin restoration
H S Cardash1, N Bichacho, S Imber
1Department of Oral Rehabilitation, Tel Aviv University, Maurice and Gabriela Goldschleger School of Dental Medicine, Israel.
The Journal of Prosthetic Dentistry
|May 1, 1990
Summary
Restoring posterior composite resin cavities near the gum line presents challenges. A technique using both amalgam and composite resin showed increased microleakage at the composite-cementum interface.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
Background:
- Class II composite resin restorations pose challenges, particularly when gingival margins approach or extend below the cementoenamel junction.
- This necessitates evaluation of alternative or combined techniques for improved longevity and reduced microleakage.
Purpose of the Study:
- To evaluate a novel restorative technique combining amalgam and composite resin for Class II cavities.
- To assess the microleakage at various interfaces within these restorations using dye penetration tests.
Main Methods:
- A technique was employed where the proximal portion of Class II cavities was restored with amalgam up to the contact area, followed by composite resin in the remaining cavity.
- Dye penetration tests were utilized to quantitatively assess microleakage at different restoration interfaces.
Main Results:
- Microleakage was significantly higher at the composite resin/cementum interface compared to amalgam/cementum and amalgam/composite resin interfaces (p < 0.001).
- No statistically significant difference in microleakage was found between the amalgam/cementum and amalgam/composite resin interfaces.
Conclusions:
- The combined amalgam and composite resin technique shows increased susceptibility to microleakage at the composite resin/cementum interface.
- Further research is needed to optimize restorative materials and techniques for Class II cavities with subgingival margins to minimize microleakage and enhance clinical outcomes.