摘要
目的比较3组器械在根管再治疗中的临床应用效果,探讨其中2种镍钛器械的应用特点。方法选择173例因根充不实或欠填需根管再治疗的177颗第一恒磨牙作为研究对象,84颗患牙均有叩痛,经首次根管治疗后出现自觉症状,随机分为3组(TF1组、Protaper D1组和不锈钢锉1组),每组各28颗;93颗无叩痛患牙,也随机分为3组(TF2组、Protaper D2组和不锈钢锉2组),每组各31颗。预备时间组间比较采用方差分析;预备后无痛率或缓解率和器械损伤情况组间比较采用卡方检验。结果预备时间TF组明显少于Protaper D组和不锈钢锉组(P=0.00);TF组的无痛率和缓解率明显高于不锈钢锉组(P<0.01);60支TF锉发生螺纹损伤;1支Protaper D发生折断。结论在临床根管再治疗中使用TF机用镍钛锉比不锈钢锉更能减少术中疼痛,节省用时,更适合弯曲根管的使用,但其易发生螺纹损伤,值得注意。
Objective To compare the clinical effects of three instruments on root canal retreatment and discuss the application characteristics of two Ni Ti instruments. Methods A total of 177 first molars of 173 patients were selected. These molars would receive root canal re-treatmentdue to failed root canal filling. Eighty-four first molars sensitive to percussion after first root canal treatment were divided into three groups： group TF1（n=28）, group Protaper D1（n=28）, group stainless steel file1（n=28）. The other ninety-three pain-free molars were randomly divided into three groups： group TF2（n=31）, group Protaper D2（n=31）, group stainless steel file2（n=31）. Preparation time comparisons among these groups were tested by variance analysis, while incidence rates of postoperative pain or remission rates of preoperative pain and equipment damage among groups were analyzed by chi-square test. Results The preparation time in group TF was significantly shorter than that in group Protaper D and stainless steel file respectively（P=0.00）. The painless rates or remission rates of group TF were greater than group stainless steel file（P〈0.01）. Tightented or loosened spiral was detected in 60 TF files. One Protaper D file was fractured. Conclusion The application of TF rotary Ni Ti instrument for root canal retreatment could more effectively relieve intraoperative pain and reduce operative time compared with stainless steel file.TF rotary Ni Ti instrument was more suitable for curved root canal, but it was also more prone to occur spiral deformation.
出处
《口腔材料器械杂志》
2016年第1期30-34,共5页
Chinese Journal of Dental Materials and Devices
作者简介
通信作者：李琴，E-mail：lq．11@163．com
