上颌第一磨牙MB2根管的治疗体会

The treatment experience on second mesiobuccal canal of maxillary first molars

目的探讨上颔第一磨牙近中颊根第二根管（MB2）根管治疗的临床疗效。方法对2008年至2011年收入我院的40例发现MB2根管的上颌第一磨牙病变患者进行根管治疗。结果40例患者有效33例，显效4例，无效3例，总有效率92．5％。40例患者治疗前有疼痛反应的例数为28例，占70％，治疗后为3例，占7．5％，治疗前后差异显著（P〈0．05）。结论做好术前检查，术中仔细探查，按照正确的步骤进行根管治疗，可以提高MB2根管的治愈率，降低患者疼痛反应，值得在临床上推广。

Objective To investigate the clinical efficacy of root canal therapy for second mesiobuccal canal of maxillary first molars. Methods 40 patients with second mesiohuccal canal of maxillary first molars who had been hospitalized during the period of 2008 to 2011 received root canal treatment. Results 33 of the 40 patients were effective, 4 were markedly improved, 3 were invalid, with a total effectiveness rate of 92.5%. The number of patients with pain response differed significantly after treatment （ 3 vs. 28 or 7.5% vs. 70%, P〈 0.05 ）. Conclusions Proper preoperative examination, careful intraoperative exploration, and root canal therapy according to the correct steps can improve the cure rate of second mesiobuccal canal and reduce pain response in patients. Root canal therapy for second mesiobuccal canal is worth popularizing clinically.