显微超声处理根管内折断器械的疗效评价

目的　评价显微超声技术处理根管内折断器械的临床疗效。方法　对常规方法不能取出的 4 4颗患牙的共 4 7支根管内折断器械 ,在根管显微镜下使用专用超声器械进行根管再处理 ,统计患牙的治疗成功率 ,并于术后 5～ 19个月复查。结果　 33颗 ( 33/44 )患牙根管内的 34支 ( 34/47)折断器械被完全取出 ,成功率 75 %。未发生根管侧穿或牙根纵裂。经复查无 1颗患牙出现治疗失败。结论　根管显微镜和超声器械的使用 ,为处理根管内折断器械提供了新的手段

Management of intracanal separated instruments with the microsonic technique and its clinical outcome

Objective To evaluate the clinical effect of microsonic technique on removal of intracanal separated instruments.Methods Forty four teeth with 47 intracanal separated instruments, which could not be successfully managed by conventional methods, were endodontically treated with ultrasonic instruments under dental operating microscope. The success rate was calculated and the cases were reviewed 5 to 19 months after retreatment. Results Thirty four(34/47) separated instruments in 33(33/44) teeth were complelety removed with a success rate of 75%. Thirteen separated instruments in 11 teeth, however, could not be eliminated from the canals. Root canal perforation or vertical fracture was not found. None of these teeth showed periapical deterioration in the follow up. Conclusions The combined use of dental operating microscope and ultrasonic instruments in endodontic treatment enriched the way of managing complicated cases of intracanal separated instruments.