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Bonding to dentin: evaluation of three adhesive materials
H Sedighi1, J M Davila, A J Gwinnett
1Department of Pediatric Dentistry, Eastman Dental Center, Rochester, New York.
ASDC Journal of Dentistry for Children
|September 1, 1992
Summary
This study found that posterior composite restorations show partial bonding to dentin, with limited improvement in material bonding over time. Further research into new materials and techniques is essential for better dental restoration longevity.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Restorative Dentistry
Background:
- Dental composites are widely used for posterior restorations.
- Assessing the long-term durability and bonding effectiveness of these materials is crucial.
- Technique sensitivity and material limitations can impact restoration success.
Purpose of the Study:
- To evaluate the dye penetration and gap formation in posterior composite restorations.
- To assess the effect of thermocycling on the bonding integrity of these materials.
- To compare current bonding performance with previously reported findings.
Main Methods:
- In vitro study utilizing scanning electron microscopy (SEM) for gap analysis.
- Dye penetration tests were performed on all specimens.
- Thermocycling was applied to simulate intraoral conditions.
Main Results:
- Dye penetration was observed in all tested specimens.
- SEM revealed isolated areas with no gap formation, indicating partial bonding to dentin.
- Similar dye penetration across all groups hindered the assessment of thermocycling effects.
Conclusions:
- Current posterior composite materials exhibit partial bonding to dentin.
- Limited improvement in bonding effectiveness has been observed.
- New materials and improved techniques are necessary for enhanced dental restoration longevity.
- Posterior composite use requires careful adherence to manufacturer instructions and routine monitoring.