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目的 :评价 Nd- YAG激光漂白四环素牙的有效性及持续性。方法 :采用 Nd- YG激光及漂白糊剂实施诊室漂白及 2周家庭漂白。利用 PR- 6 5 0测色计 CIE L* a* b*表色系对漂白术前及术后 1d,2周 ,3月及 6月的牙齿分别测色 ,分析牙色的变化。结果 :漂白牙齿的平均测色结果显示 ,术后复查各阶段 L*均高于术前 ,与术前比较均有显著性差异 (P<0 .0 5 ) ;b* 均低于术前 ,除 6月 ,术后各阶段与术前比较均有显著性差异 (P<0 .0 5 ) ;a*各阶段与术前比较均无显著性差异。色差△ E值呈逐渐下降趋势。结论 :Nd- YAG激光漂白四环素牙即刻效果卓越 ,短期效果明显。
Objective: To evaluate the effectiveness and persistence of bleaching tetracycline in Nd-YAG laser. Methods: The office bleaching and 2-week home bleaching were performed using Nd-YG laser and bleaching paste. The tooth color of teeth before bleaching and 1, 2, 3 and 6 months after bleaching were measured by PR-650 colorimeter CIE L * a * b * colorimetric system, respectively. Results: The average colorimetric results of bleached teeth showed that L * in each stage of postoperative reexamination was significantly higher than that before operation (P <0.05), while b * was lower than preoperative, Except for June, there were significant differences between preoperative and postoperative stages (P <0.05). There was no significant difference in a * between preoperative and postoperative stages. Color △ E values showed a downward trend. Conclusion: Nd-YAG laser bleaching tetracycline tooth immediately effective, short-term effect is obvious.