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The fluid-filled gap under amalgam and resin composite restorations
1Section of Operative Dentistry, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University.
American Journal of Dentistry
|October 1, 1991
Summary
Marginal gaps in dental restorations allow fluid and bacterial invasion, potentially causing secondary caries. Effective sealing and antibacterial measures at the tooth-restoration interface are crucial for preventing bacterial growth and protecting dentin.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Cariology
Background:
- Marginal gaps form between dental restorations (amalgam, resin composite) and cavity walls.
- These gaps allow ingress of oral fluids and substances from dentinal tubules.
- This microleakage facilitates bacterial invasion, leading to secondary caries and dentin/pulp irritation.
Purpose of the Study:
- To discuss factors influencing marginal gap formation in dental restorations.
- To highlight the consequences of microleakage and bacterial invasion.
- To review strategies for controlling bacterial growth at the tooth-restoration interface.
Main Methods:
- Literature review on marginal gap formation.
- Analysis of fluid penetration and bacterial invasion mechanisms.
- Discussion of restorative material properties and interface sealing.
Main Results:
- Marginal gaps are a common issue with amalgam and resin composite restorations.
- Microleakage leads to secondary caries and pulpal inflammation.
- Effective sealing, gap obliteration, and antibacterial agents mitigate bacterial growth.
Conclusions:
- Controlling marginal gaps is essential for long-term restoration success.
- Strategies include optimizing material placement and utilizing antibacterial agents.
- Proper management of the tooth-restoration interface prevents further degradation.