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In vitro action of various carbamide peroxide gel bleaching agents on the micro hardness of human enamel
Ch R Sunil1, V Sujana, T Manisha Choudary
1Department of Conservative Dentistry, SIBAR Institute of Dental Sciences, Andhra Pradesh, India.
Aims And Objectives:
The study was undertaken to evaluate the effects of different carbamide peroxide based gels on micro hardness of enamel exposed to these agents for a period of 8 h daily for a total of 1 week.
Materials And Methods:
Thirty enamel specimens of 5 × 5-mm dimensions were sectioned from labial surface of maxillary incisor teeth and were embedded in Bakelite. Each block is polished to facilitate micro hardness testing. Pre-bleaching hardness values of 30 samples were measured using Vickers micro hardness tester. After exposing the specimens for different agents for 8 h daily for 1 week, post-exposure micro hardness values were taken and evaluated.
Conclusion:
With increase in concentration of carbamide peroxide gel from 10% to 16%, mean micro hardness values decreased but to an insignificant level.
