【摘要】 目的 :评价Beyond冷光美白仪漂白增龄性变色牙的疗效及安全性。　方法 :用Beyond冷光美白仪及配套的冷光美白剂对试验组 32例患者 4 2 6颗增龄性变色牙进行漂白 ,对照组 32例患者 4 31颗增龄性变色牙用奥伦增白剂漂白作对照。用VITA比色板作漂白前后比色 ,分析漂白效果 ,观察牙齿敏感情况。　结果 :试验组漂白显效率为 89.7% ,对照组为 73.3% ,两者差异有显著性意义 (P <0 .0 5 )。试验组有 9例 (2 8.1% )患者出现轻度牙齿酸痛或牙龈损伤 ,对照组有 10例 (31.3% )患者出现不同程度牙齿酸痛或牙龈损伤 ,两者无显著差异 (P >0 .0 5 )。　结论 :Beyond冷光美白仪对增龄性变色牙漂白有效、安全、快速更多还原

【Abstract】 Objective: To evaluate the effect and safety of Beyond cold light tooth whitening kit on bleaching the teeth changed in color with age. Methods: 426 teeth changed in color with age in 32 patients were bleached with Beyond cold light tooth whitening kit, and 431 teeth changed in color with age in 32 patients were bleached with Aulen bleaching agent as control. The changes of teeth color were evaluated by VITA shade guide matching, and the sensitivity of tooth was recorded. Results:The highly effective rate (89.7%) of experimental group was significantly higher than that(73.3%) of control group(P<0.05). Nine of thirty-two patients(28.1%)had slight tooth aches or gingival injury in experimental group, and 10 of thirty-two patients(31.3%)had different degree of tooth aches or gingival injury in control group, there was no difference between the two groups(P>0.05). Conclusion: Beyond cold light tooth whitening kit is proved to be an effective, safe and quick method of bleaching the teeth changed in color with age.更多还原