不同操作模式的加热恒温漂白对健康自然牙漂白效果的临床评价

Clinical evaluation of the efficacy of different operation modes on heating thermostat teeth bleaching

目的对不同操作模式的加热恒温漂白效果进行临床评价。方法 12名受试者分2组接受2种不同操作模式的加热恒温漂白治疗,包括在一次就诊时连续漂白操作3次(A)以及分为3次就诊,间隔1天,每次就诊漂白操作1次(B)。以牙科色度计测定各次操作之后以及漂白术完成1周后受试者上中切牙的颜色参数值,并计算相应的白度值和色差值。结果不论何种操作模式,漂白术后牙色的L*值提高,b*值降低。操作模式A术后1周与B各次操作后及术后1周获得的色差值之间并无统计学差异。操作模式A术前与术后1周的白度值之间存在显著性差异。操作模式B术前与第1次、第2次、第3次及术后1周的白度值之间存在显著性差异。结论两种操作模式下加热恒温漂白均可导致健康上中切牙发生亮度增加以及蓝色转变的颜色变化。

Objective To compare the effectiveness of two different bleaching operation modes regarding the degree of bleaching and changes of color parameters. Methods 12 patients were treated with two bleaching operation modes,including three continuous sessions in one treatment and one-day interval between two sessions. Maxillary central incisor color was registered during each session and1 week after completing the treatment by a dental colorimeter,registering parameters L ＊,a ＊,b ＊,color difference values,and whiteness values. Results For both bleaching operation modes,increase in L＊ values and decrease in b＊ values were found after bleaching. There was no significant difference in the color difference values after bleaching between bleaching operation mode A and B.Both bleaching operation modes showed a significant change in whiteness values after bleaching. Especially,whiteness values increased after each session for bleaching operation mode B. Conclusion Both bleaching operation modes can result in increase in brightness and blue shift in healthy central upper incisors when performing heating thermostat teeth bleaching.