Abstract:

Abstract：Objective To evaluate the clinical effects of different methods of bleaching on dental fluorosis. Methods Thirty patients with dental fluorosis were divided into 3 groups（Group A，B，C）randomly which were bleached by bleaching，laser bleaching and home bleaching，respectively. Each group contained 60 teeth. The changes of L*a*b* before bleaching，immediately after bleaching，1 month after bleaching and 1 year after bleaching were used to evaluate the effects of 3 groups. Results The 3 methods showed the significant teeth bleaching effect immediately after bleaching. The teeth colour recovery had statistical difference between 1 month after bleaching and 1 year after bleaching in group A and B .The teeth colour recovery didn’t have statistical difference between 1 month after bleaching and 1 year after bleaching in group C. Conclusion The 3 methods have significant teeth bleaching effect，although the teeth colour can recover in short time. Home bleaching can provide a more stable effect.

Key words: laser bleaching；home bleaching, dental fluorosis；color analysis

摘要：

目的 评价不同漂白方法对氟斑牙漂白的临床效果。方法 轻中度氟斑牙患者30例随机分为3组，每组10例60颗牙。分别采用联合漂白、激光漂白、家庭漂白3种方法进行上前牙区漂白，在漂白前、漂白后即刻、漂白后1个月、漂白后1年记录其L*a*b*值，比较3组漂白效果及颜色回复情况。应用统计学分析软件CS10.34对数据进行t’检验。结果 3组漂白后的L*a*b*值与漂白前比较差异均有统计学意义（均P＜0.05）；漂白后1个月，联合组与激光组颜色有所回复（P＜0.05）；漂白后1年，联合组、激光组颜色与漂白后即刻相比有所回复（P＜0.05），与漂白后1个月相比颜色回复差异无统计学意义（P＞0.05）；家庭组颜色回复差异无统计学意义，但1个月到1年期间颜色变化小于治疗后即刻到1个月的变化（P＜0.05）。结论 3种漂白方案治疗1个疗程都得到相似的美白效果，但短期内也出现漂白牙的颜色回复，家庭漂白颜色相对稳定，诊室漂白收效快，3种治疗方案各有其适应人群。

关键词: 激光漂白, 家庭漂白, 氟斑牙, 色彩分析