Effects of a New Bleaching Agent of Containing Visible Light Sensitive TiO_2 on Vital Teeth Bleaching

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A new tooth bleaching agent containing visible light sensitive TiO2 and 3.5% H2O2 has been developed. It is a safer bleaching agent for oral soft tissue compared with usual ones containing a high concentration of H2O2.The purpose of this study was to evaluate the clinical efficacy of the newly developed bleaching agent.The bleaching effect was determined by calculating the color difference, and monitoring the degree of satisfaction of the patients, compared with pre-and post-operation, during the 6-month examination period. Also the safety of the agent was investigated according to the clinical examination during the bleaching procedure period.In the clinical evaluation, the bleaching effect for discolored vital teeth was clearly recognized during the bleaching period, however the postoperative evaluation showed a diminishing tendency. Regarding the satisfaction degree of patients, over 90% answered "very much" or "much". As for the safety, four cases complained of gingival erosion, but the gingival recovered after one week.It is concluded is a clinically effective and safe bleaching agent for discolored vital teeth.