Effect of in-dental clinic bleaching agents on the releases of mineral ions from the enamel surfaces in relation to their times intervals


Background: alterations of the enamel after topical application of bleaching agents, presenting as majorconsequences are: ions release, increased superficial roughness, stronger bacterial attachment and hardnessalteration. The aims of the study were to evaluate the effects of two different types of bleaching agents for vital teethby using with light source on the release of ions (Calcium and phosphate ions) from the enamel surface.Materials and methods: Fifty three sound enamel surface for calcium ions release and Fifty three sound enamel surfaces forphosphate ions, were subject to treated with bleaching agents (35% hydrogen peroxide and carbamide peroxide) andthen application of light and laser radiation to activate the bleaching agents. Spectrophotometer and Buck scientificatomic absorption spectrophotometer were used to measure the ions release from enamel surface.Results: highly significant increase in the release of ions (calcium ions), while significant increase in the release of ions(phosphate ions) in relation to the times intervals.Conclusions: In this study showed that release of calcium ions from enamel surface after treated with both 35%carbamide peroxide and 35% hydrogen peroxide increase with increase the time and compared with release ofphosphate ions release and control groups.