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Effect of composite warming on shear bond strength
General Dentistry
|March 8, 2018
Summary
Warming dental composite resins does not significantly impact their bond strength to enamel or dentin. This study found no difference in shear bond strength between room temperature and prewarmed composite materials.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Biomaterials Engineering
Background:
- Composite resins are widely used in dental restorations.
- Heating composite resins may improve handling and properties.
- Previous research suggests benefits like reduced viscosity and microleakage.
Purpose of the Study:
- To compare the shear bond strength of prewarmed (54°C) versus room temperature (22°C) composite resins.
- To evaluate the effect of composite resin warming on bond strength to etched enamel and prepared dentin.
Main Methods:
- Bovine incisors were prepared, etched, and treated with self-etching primer and adhesive.
- Composite resin specimens were divided into room temperature and prewarmed groups (n=14 each).
- Specimens were bonded, light-cured, stored in water for 24 hours, and tested for shear bond strength.
Main Results:
- Shear bond strength testing revealed no statistically significant difference between the two groups (P = 0.05).
- The mean bond strengths for room temperature and prewarmed composites were comparable.
- Warming composite resin did not negatively or positively affect the bond strength in this study.
Conclusions:
- Warming composite resin to 54°C does not significantly alter its shear bond strength to either enamel or dentin.
- The clinical benefits of prewarming composite resins regarding bond strength may be limited.
- Further research could explore other mechanical properties or long-term effects of warmed composites.
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