| 摘要 |
PROBLEM TO BE SOLVED: To bleach the staining substance of a tooth and re-staining of a once whitened tooth by a simple operation without operation burdens of mouth opening by a mouth opener and mounting of a tray over a long period of time or the like without using a bleaching agent and without causing thermal damages on the tooth or the gums.SOLUTION: With a photolabile pigment which is the staining substance of a tooth as a target, a tooth surface is irradiated with the light of a wavelength and intensity for causing fluorescent emission which is the index of photochemical reaction for causing bleaching of the photolabile pigment by the photochemical reaction by the photolabile pigment and the light. During irradiation, an irradiation handpiece is capable of cooling the tooth surface and is capable of bleaching the tooth without causing thermal damages on the tooth or the gums. For the irradiation handpiece, aqueous gel for transmitting light and heat is applied onto a gel pad cover for transmitting the light and the heat, that covers an irradiation part without opening the mouth while changing a position to left and right and upper and lower dentitions to about the fifth tooth, it is brought into contact with the tooth surface lightly and is irradiated successively, and the tooth is bleached by a simple operation without operation burdens. |
