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Cervical gap formation in class II composite resin restorations.
Swedish Dental Journal
|January 1, 1984
Summary
This study compared cervical marginal gap widths in dental composite restorations. An experimental condensable composite showed significantly smaller gaps than regular or microfilled composites using the acid etch technique.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Biomaterials
Background:
- Class II restorations are common in dentistry.
- Composite resins are widely used for restorations.
- Marginal integrity is crucial for restoration longevity.
Purpose of the Study:
- To evaluate cervical marginal gap widths in different composite materials.
- To assess the impact of the acid etch technique on gap formation.
- To compare conventional composites with an experimental condensable composite.
Main Methods:
- Class II restorations were fabricated in vitro using three composite materials: regular, microfilled, and an experimental porous-filler condensable composite.
- The acid etch technique was employed for cavity preparation.
- Cervical marginal gap widths were measured for each material.
Main Results:
- The experimental condensable composite exhibited significantly smaller cervical marginal gap widths (approximately 10 microns).
- Conventional regular and microfilled composites showed larger gap widths (approximately 35 microns).
- The acid etch technique's influence on gap formation varied between material types.
Conclusions:
- Experimental condensable composites with porous fillers demonstrate superior marginal integrity compared to conventional materials.
- Minimizing cervical marginal gaps is achievable with advanced composite formulations.
- Further research into condensable composites may lead to improved clinical outcomes for dental restorations.