In vitro action of various carbamide peroxide gel bleaching agents on the micro hardness of human enamel

• Main Authors: CH R Sunil, V Sujana, T Manisha Choudary, B Nagesh
• Format: Article
• Language: English
• Published: Wolters Kluwer Medknow Publications 2012-01-01
• Series: Contemporary Clinical Dentistry
• Subjects: Carbamide peroxide gel; micro hardness; vital bleaching
• Online Access: http://www.contempclindent.org/article.asp?issn=0976-237X;year=2012;volume=3;issue=2;spage=193;epage=196;aulast=Sunil

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 x 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.