The Effects Of Carbamide Peroxide Bleaching Gel With Different Thickening Agents On Enamel And Restorative Material

Since the introduction of night-guard vital bleaching in 1989 by Haywood and Heymann, it has being widely used in the clinic after constant improvement and updating. Carbamide peroxide (CP) and thickening agents are two major components of home bleaching agents. Most previous studies only focused on the effect of CP concentrations on bleaching efficacy, enamel physiology and restorative materials, but little studies were reported on the influence of thickening agents. Therefore, research is done on the effects of thickening agents on the enamel property and restorative materials. Using Carbopol, PVP and Poloxamer as thickening agent respectively, bleaching gels containing 10%, 15% and 20% CP were made, then the effects of different thickening agents and their matching CP concentrations on enamel and light-polymerized composite resin restoration material were analyzed as following:Part â…  - the effect of CP bleaching agents on enamel propertyThe outcome and performance of CP bleaching formula were systematically analyzed by chroma, microscopy, micro-hardness and roughness of enamel surface. The results are as following:1. With same thickening agent, the bleaching effect of 20% CP is significantly greater than 10% CP; the longer the bleaching period, the greater the bleaching...