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Microleakage in MOD resin composite with three dentin bonding agents.
Summary
This study compared microleakage in MOD composite restorations using different bonding agents. Severe microleakage occurred at cementum margins, regardless of the bonding agent used.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
Background:
- Microleakage in composite restorations can compromise tooth longevity.
- Effective dentin bonding agents are crucial for sealing margins.
Purpose of the Study:
- To evaluate microleakage under MOD composite restorations using Tenure, Bondlite, and Ketac Silver.
- To compare marginal seal at enamel versus cementum margins.
Main Methods:
- MOD cavities were prepared in extracted molars.
- Three groups used different bonding agents: Tenure, Bondlite, or Ketac Silver with Bondlite.
- Teeth underwent thermal cycling, silver nitrate staining, sectioning, and microleakage scoring.
Main Results:
- Microleakage was significantly lower at enamel margins compared to cementum margins across all groups.
- All tested bonding systems exhibited severe marginal microleakage at cementum margins.
Conclusions:
- Cementum margins present a significant challenge for achieving a durable seal with current bonding agents.
- Further research is needed to improve bonding to cementum for MOD restorations.