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Can brackets be bonded with a composite resin after expiration date?
Ahmet Yalcin Gungor1, Huseyin Alkis2, Hakan Turkkahraman2
1Department of Orthodontics, Akdeniz University Faculty of Dentistry, Antalya - Turkey.
The International Journal of Artificial Organs
|March 9, 2016
Summary
This study found that expired composite resin does not significantly affect bracket shear bond strength in orthodontic treatments. Expiration dates appear not to impact the adhesive performance of dental composite materials.
Area of Science:
- Orthodontics
- Dental Materials Science
Background:
- Dental composite resins are crucial for orthodontic bracket bonding.
- The impact of using expired adhesive materials on bond strength is not fully understood.
Purpose of the Study:
- To evaluate the shear bond strength of orthodontic brackets bonded with composite resin before and after its expiration date.
Main Methods:
- Forty-five premolar teeth were divided into three groups.
- Brackets were bonded using composite resin before expiration (Group I) and 1-2 years after expiration (Groups II & III).
- Shear bond strength and Adhesive Remnant Index (ARI) were analyzed using ANOVA and chi-square tests.
Main Results:
- No statistically significant differences in shear bond strength or ARI scores were observed between the groups.
- A higher frequency of ARI scores indicating more adhesive remaining on the tooth was noted across all groups.
Conclusions:
- The expiration date of the composite resin did not significantly affect the shear bond strength of orthodontic brackets.
- Further research is recommended to explore potential post-expiration effects, such as cytotoxicity.
