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.COPYRIGHT: (C)2013,JPO&INPIT【課題】漂白剤を使用することなしに、歯または歯肉に熱損傷を起こさずに、開口器よる開口、長時間にわたるトレーの装着などの施術負担がない簡単な操作で歯の着色物質と一度白くなった歯の再着色の脱色を可能とする。【解決手段】歯の着色物質である感光色素をターゲットとして、感光色素と光による光化学反応による感光色素の脱色を引き起こすための光化学反応の指標である、蛍光発光を起こす波長と強度の光を歯面に照射する。照射ハンドピースは照射中、歯面を冷却でき歯または歯肉に熱損傷を起こさずに歯の脱色ができる。照射ハンドピースは左右、上下5番程度までの歯列に対して位置を変えながら開口せずに照射部を覆う光と熱を伝えるジェルパッドカバー上に、光と熱を伝える水性ジェル塗布し、歯面に軽く接触させ順次照射し施術負担がない簡単な操作で歯の脱色を可能とする。【選択図】図3
