Abstract: Abstract：Objective To evaluate the clinical effect of pulse Nd∶YAG laser combined with total acid bonding system on abrasion molar during one year period. Methods Totally 40 abrasion molars were selected from 20 patients between February of 2011 and May of 2011，each of them had at least two molars or premolars according to the standard，and they were divided into two groups at random. The experimental group were treated with pulse Nd∶YAG laser combined with Scotchbond，while the control group were only treated with Scotchbond，and composite resin Z350 was selected to restore the defect. The modified USPHS criteria were used to evaluate the treatment effects at recall periods. Follow-up was conducted for one year. Results For success rate of one year，the difference between the experimental group and the control group was significant（P < 0.05）. At the same time，the condition sensitivity of tooth in the experimental group was better. Conclusion The bonding strength of abrasion molar treated with Nd∶YAG laser combind with total acid bongding system can be improved.

Key words: pulse Nd∶YAG laser, total acid bonding system, composite resin, abrasion molar

摘要： 目的 探讨Nd∶YAG激光联合全酸蚀黏结系统治疗磨损牙的术后敏感情况及临床疗效。方法 选取2011年2—5月在中国医科大学口腔医学院牙体牙髓科门诊就诊、符合纳入标准的20例患者的Ⅲ级以下磨损牙（前磨牙或磨牙）40颗，每例患者有2颗同名牙有相似病损，按照随机数字表将同一患者的2颗患牙分为试验组和对照组。试验组使用Nd∶YAG激光联合全酸蚀黏结剂Scotchbond处理后，用Z350复合树脂充填修复；对照组直接使用Scotchbond处理后，用Z350复合树脂充填修复，以改良美国公共卫生署（USPHS）标准评价修复后1年的随访结果。 结果 治疗后6个月随访，牙齿敏感情况试验组好于对照组，差异有统计学意义（P < 0.05）；1年后试验组成功率高于对照组，差异有统计学意义（P < 0.05）。结论 Nd∶YAG激光联合全酸蚀黏结剂处理磨损牙表面后进行复合树脂修复，可在一定程度上减轻术后敏感症状，增强黏结强度，改善修复治疗效果，对Ⅲ级以下磨损牙的修复有较大的意义。

关键词: Nd∶YAG激光, 全酸蚀, 复合树脂, 磨损牙