两种牙齿美白剂联合治疗变色牙临床效果分析

Clinical effects of combined treatment of discolored teeth by two tooth whitening agents

目的探讨两种浓度过氧化氢牙齿美白剂联合治疗变色牙的效果与安全性。方法对66例变色牙患者进行两种浓度过氧化氢牙齿美白剂联合漂白治疗(Ⅰ型35%、Ⅱ型6%),并用Vita比色板比色记录漂白前后的色阶,同时观察治疗期间的不良反应。结果治疗后的色阶平均提高了5.9个,明显高于治疗前,差别有统计学意义(P<0.000 1);对外源性染色牙、天然色黄及轻度氟斑牙的患者美白效果显著,而四环素牙的患者美白有效,但不理想;所有患者均未出现严重不良反应。结论两种浓度牙齿美白剂型联合治疗变色牙的美白效果显著且安全。

Objective To evaluate the efficacy and safety of combined treatment of discolored teeth by two tooth whitening agents with different hydrogen peroxide concentrations .Methods 66 patients with discolored teeth accept-ed combined bleaching treatment by two tooth whitening agents with different hydrogen peroxide concentrations （ typeⅠ35%and typeⅡ35%） .Vita shade guide was used to record pre and post-bleaching color gradation .Observation of adverse reactions was also conducted .Results Compared with pre-treatment state ,post-treatment color gradation was 5 .9 higher on the average .Differences in color gradation before and after treatment were statistically significant （ P〈0 .000 1 ） .The treatment showed a significant whitening effect in patients with exogenously stained teeth , naturally yellow teeth and mildly fluorotic teeth .Whitening effect on tetracycline stained teeth was detected but not ideal .No se-rious adverse reaction was observed .Conclusion As per statistic data of clinical experimental results , combined treatment by two tooth whitening agents containing different concentrations of hydrogen peroxide is effective and safe for teeth whitening .