活体上颌中切牙加热漂白后的颜色值变化

摘要

AIM:To evaluate the color changes of healthy central upper incisor after chairside bleaching. METHODS:Color changes of 16 healthy central upper incisors before and after chairside heat bleaching by wy10 were determined using a dental colorimeter,and color difference values were calculated.RESULTS:Color difference values were 4.23 ±2.21 after bleaching.Paired t-test showed that L* parameter of the central upper incisors increased (P<0.05)and b* parameters decreased (P<0.05)after bleaching.CONCLUSION:Chairside heat bleaching re-sult in lighter and blue-converse of healthy central upper incisors.%目的：观察患者接受牙齿椅旁恒温外漂白治疗后健康上颌中切牙的颜色值变化。方法：利用牙科色度计采集16例健康上颌中切牙漂白前后的L*、a*、b*颜色参数值，分析各参数的变化以及计算漂白后牙齿颜色变化的色差值。结果：漂白后牙色平均改善了6±3个色阶。漂白前后的色差值为4．23±2．21。配对t检验结果显示，上颌中切牙漂白后L*值显著增加，b*值显著降低，a*值无明显变化趋势。结论：牙齿椅旁恒温外漂白治疗能够增加健康上颌中切牙的明度，颜色向蓝色转变。