甲硝唑氢氧化钙糊剂在脱位前牙再植术中的应用

Application of metronidazole calcium hydroxide paste in the re-plantation of anterior dislocation

目的 探讨甲硝唑氢氧化钙糊剂根管内封药对外伤脱位前牙再植术的作用.方法 选择外伤脱位2 h～9 h间前牙77颗,随机分为实验组和对照组.实验组再植前根管内置甲硝唑氢氧化钙糊剂,1月后完成根管充填;对照组再植前行一次性根管充填,术后2年跟踪观察并分析其原因.结果 随访2年,对照组33颗牙中9颗出现牙松动或脱落,再植成功率72.73%.实验组34颗牙中2颗牙松动,2年再植成功率94.12%.实验组与对照组2年再植成功率差异有统计学意义（χ2=5.584,P〈0.01）.结论 脱位牙再植术是治疗外伤性脱位牙的有效方法,对于外伤性前牙脱位患者,尽早行脱位牙再植术,并根管内置甲硝唑氢氧化钙糊剂1月,可减少根尖感染和牙根吸收,提高脱位前牙再植成功率.

Objective To investigate the role of metronidazole calcium hydroxide root canal sealed drugs on traumatic dislocation of the anterior teeth re-plantation. Methods The 77 teeth of traumatic dislocation occurred between two and nine hours were randomly divided into experimental group and control group. Re-plantation of the experimental group were built-in metronidazole calcium hydroxide paste in the root canal for one month while the control group were completed a one-time root canal filling prior to re-plantation, followed up with a two-year observations. Results The results demonstrated 72.73% success rate of re-plantation in the control group and 94.12% in experimental group with the significant difference （x^2 = 5.584, P 〈0.01）. Conclusion Tooth re-plantation for dislocation is considered as the effective means to treat the traumatic dislocation, and the root canal with a one-month built-in metronidazole calcium hydroxide paste can reduce apical infection and root absorption, and improve the success rate of re-plantation of dislocation of the front teeth.