漂白後のエナメル質表層への薬剤処理が表面性状および経時的色調変化におよぼす影響

漂白后牙釉质表层化学处理对表面纹理和颜色随时间变化的影响

• 批准号: 13771150
• 负责人: 白石 充
• 金额: $ 1.47万
• 依托单位: Osaka Dental University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13771150/
• 关键词: 漂白; 色素沈着; 後戻り; 歯牙漂白

大阪歯科大学附属病院保存修復科における生活歯漂白症例を対象として,漂白前,漂白終了時,1年から2年経過観察時および歯面清掃後の歯冠部分を色彩計にて計測し,色彩分析ソフトにてL^*値a^*値b^*値を算出した結果,漂白終了時に低下したb^*値が,経過観察時には大きくなるが,歯面清掃後には漂白終了時の値に近似になる症例が半数以上認められた.このことから,漂白後1年から2年間経過時の色調変化の一要因として,表在性の色素沈着が関与していることが示唆された.in vitroにおいて,抜去後冷凍保存したヒト歯の歯冠部エナメル質から縦横5mm厚さ1mm切片を作製し,試料表面を器械刷掃後に10分間超音波洗浄し,歯科用漂白剤Hi-Lite(松風)にて3回処理を行った試料と漂白処理を行っていない試料を作製し,0.05wt%ブドウ皮色素溶液10ml中あるいは蒸留水中に60℃にて30日間浸漬した.試料の色を浸漬前,浸漬24時間後,48時間後,14日後,30日後に,それぞれ分光測色計CM-2600d(ミノルタ)にて測定し,測定結果はL^*値a^*値b^*値にて計算し,浸漬前と浸漬後の色差(ΔE^*ab)を求めた.その結果,漂白処理後ブドウ皮色素溶液に浸漬した試料は,14日後にすべてが色差11以上を示し,浸漬14日後と30日後では有意差が認められなかった.一方,漂白処理を行っていない試料では,色差に試料間でのばらつきが顕著であった.よって,漂白処理したエナメル質切片をブドウ皮色素溶液中に60℃にて14日以上浸漬した場合,色素沈着による着色試料が作製できることが示唆された.さらに,漂白処理後エナメル質を2%フッ化ナトリウム処理あるいは0.045%モノフルオロリン酸ナトリウムジェル処理した試料のブドウ皮色素溶液浸漬後の色を測定し,浸漬前と浸漬後の色差を求め,漂白処理のみの試料の場合と比較し,漂白後エナメル質への各処理が色素沈着性の着色へ及ぼす影響を検討中である.

There are many cases of daily dental bleaching in the Department of Preservation and Prosthetics, Osaka Dental University Hospital. Before bleaching, at the end of bleaching, during 1 - 2 years of inspection, and after facial cleaning, the crown part was measured with a color meter. The L^* value a^* value b^* value was calculated using a color analysis software. The result was that the value was low at the end of bleaching, and the value was high at the end of inspection. More than half of the cases were identified after surface cleaning One of the main reasons for the color change over time from 1 year to 2 years after bleaching is that the pigmentation of the surface is related to the color change.In vitro, after cryopreservation, the crown of the tooth is cut into 5mm thick and 1mm thick sections. The surface of the sample is washed by ultrasonic wave for 10 minutes after instrument brushing. The bleaching agent Hi-Lite(loose air) for dental use is used for 3-stage treatment of the sample and bleaching treatment of the sample. 0.05wt% of the pigment solution for dental use is used for 10ml of distilled water at 60℃ during the day. Before immersion, after immersion for 24 hours, after immersion for 48 hours, after immersion for 14 days, after immersion for 30 days, the color of the sample was measured by spectrophotometer CM-2600d (), and the measurement results were calculated from L^* value a^* value b^* value, and the color difference (ΔE^*ab) before immersion and after immersion was calculated. As a result, after bleaching treatment, the color difference of the sample immersed in the pigment solution was more than 11 after 14 days, and the color difference was intentionally different after 14 days and 30 days of immersion. One side, bleaching treatment, sample, color difference, sample, color difference. In the case of bleaching treatment and immersion in pigment solution at 60℃ for more than 14 days, the pigmented colored sample shall be prepared. In addition, after bleaching treatment, the color of the sample after immersion in the pigment solution was measured. Before immersion and after immersion, the color difference of the sample after bleaching treatment was compared. After bleaching, the color difference of the sample was measured.

项目成果

白石 充: "漂白後のエナメル質への色素沈着について-色素沈着エナメル質試料の作製-"日本歯科保存学雑誌. 45・秋季特別. 86 (2002)

Mitsuru Shiraishi：“关于漂白后牙釉质的色素沉着 - 色素牙釉质样品的制备 -”日本保守牙科杂志 45/秋季特刊。