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目的:评价一次法和多次法根管治疗对牙髓坏死的年轻恒磨牙术后疼痛及疗效的影响。方法:选取11～18岁150颗牙髓坏死的恒磨牙,随机分成两组,分别采用一次法和多次法完成根管治疗。所有患牙的根管中上段2/3均用GG钻敞开,根尖1/3采用逐步后退法预备,牙胶冷侧压法充填根管。采用Moha Sulong提出的疼痛分级法记录充填后疼痛的程度。数据采用x2检验。结果:一次法和多次法在术后疼痛、根管治疗疗效的差异上没有统计学意义。结论:一次法根管治疗应用于无症状的年轻恒磨牙是可行的,但要注意控制感染和适应症选择。
Objective: To evaluate the effect of primary and multiple root canal therapy on postoperative pain and efficacy of young permanent molars with pulp necrosis. Methods: 150 teeth aged 11 ~ 18 years old with permanent pulp molars were randomly divided into two groups. The primary and secondary root canal treatments were performed by one-time and multiple-time methods respectively. All the upper teeth of the root canal 2/3 are open with GG drill, apical 1/3 with the gradual retreat preparation, cold tenting lateral filling method of filling the root canal. The degree of post-filling pain was recorded using the pain grading method proposed by Moha Sulong. Data using x2 test. Results: There was no significant difference between the one-way and multiple-procedure in the postoperative pain and the difference in the curative effect of root canal therapy. CONCLUSION: One-time root canal therapy is feasible for asymptomatic young molars, but care should be taken to control infection and indication choice.