Abstract:

Abstract：Objective    To evaluate the clinical effect of  Opalescence PF in-home tooth whitening system and Beyond whitening accelerator on discolored tooth. Methods    Ninety-six discolored patients were selected randomly and received the bleaching treatment with Opalescence PF in-home tooth whitening system and Beyond whitening accelerator. The tooth color was detected with Vita shade guide before and after the treatment. The sensitivity of  the teeth was recorded after the  treatment by Visual analogue scale（VAS）. The color improvement maintained was assessed in two years. Results    The gereral effective rate was 98% and 100%. The significant effective rate of the tetracycline pigmentation teeth was of significant difference（P < 0.05） between the two groups. The gereral effective rate was 32% and 28.3% after two years. The tooth sensitivity appeared after the treatment and relieved in 6-24 hours. Conclusion    The bleaching effect of Opalescence PF in-home tooth whitening system and Beyond whitening accelerator is good and safe，and can maintain for two years. On the tetracycline pigmentation teeth，Beyond whitening accelerator is better than Opalescence PF in-home tooth whitening system. The two methods are both safe clinically.

Key words: tooth bleaching, tooth sensitivity, hydrogen peroxide

摘要：

目的 评价家庭夜间美白法与冷光美白技术用于着色牙漂白的临床效果。方法 收集广州市东升医院口腔科2007—2010年的96例着色牙病例，分别用家庭夜间美白法（50例）与冷光美白技术（46例）进行牙齿漂白，以VITA 比色板分析脱色效果，用数字化疼痛评判法（VAS）记录受试者术中牙齿敏感程度。术后及2年后复查评价疗效。结果 术后家庭夜间美白组总有效率为98.0%，冷光美白组为100.0%，两组总有效率差异无统计学意义（P＞0.05）。四环素牙治疗显效率、总有效率方面：家庭夜间美白组为72.2%、94.4%，冷光美白组为90.0%、100.0%，差异均有统计学意义（均P＜0.05）。术中VAS评判：家庭夜间美白组敏感率为84.0%，冷光美白组为80.4%，两组敏感率差异无统计学意义（P＞0.05）。所有敏感者停止用药后6～24 h均能缓解。2年后复查：两组牙齿颜色均出现反色。家庭夜间美白组总有效率为32.0%，冷光美白组为28.3%，两组差异无统计学意义（P＞0.05）；与治疗结束时的总有效率差异有统计学意义（P＜0.05）。2年后检查两组牙髓活力均正常。结论 家庭夜间美白法与冷光美白技术治疗着色牙效果显著，在四环素牙上冷光美白技术优于家庭夜间美白法。2年后两组牙颜色均出现反色。两种漂白方法均具有临床安全性。

关键词: 牙齿漂白, 牙齿敏感, 过氧化氢