新型镍钛器械M3-PRO弯曲根管预备的临床研究

Clinical analysis of the shaping ability of M3-PRO NiTi files in curved root canals

目的评价新型镍钛根管预备器械M3-PRO在弯曲根管预备中的临床效果。方法临床试验组:选择行根管治疗的70个弯曲根管,随机分为两组,分别使用镍钛器械M3-PRO和Protaper进行根管预备,摄平行投照X线根尖片比较两组预备后弯曲根管充填情况,记录根管预备时间、诊间疼痛出现情况和器械分离情况,评价其对弯曲根管的预备效果。体外实验组:选择30颗国际标准ISO15号透明树脂模拟根管,预备方式同临床实验组,记录根管预备前后形态,进行根管中心定位能力对比研究。结果临床实验组:M3-PRO组恰填率为94.2%,Protaper组为91.4%,P>0.05; M3-PRO组平均预备时间为(4.54±0.74) min,Protaper组为(6.68±1.10) min(P<0.01); M3-PRO组诊间疼痛出现率为5.7%,Protaper组为8.5%(P>0.05)。实验期间两组器械均未发生器械分离情况。体外实验组:在距离根尖孔3、4、5、6 mm处M3-PRO根管成形能力优于Protaper(P<0.01)。结论 M3-PRO可以满足临床上对弯曲根管预备的要求。

Objective To evaluate the clinical effects of curved root canal preparation using M3-PRO.Methods In clinical trial group,70 curved root canals of permanent teeth were prepared using the instruments of M3-PRO and Protaper respectively(n=35).Standardized paralleling periapical radiographs were used to compare the curved root canal filling effect.The root canal preparation time,inter-appointment pain and instrument separation were compared.In vitro study,a total of 30 simulated root canals were divided into two groups.The pre-instrumentation and post-instrumentation images were recorded by microscope.The efficacy of the shaping ability of root preparation was analyzed.Results Clinical trial group:The successful rate of canal filling:M3-PRO was 94.2%and the Protaper was 91.4%(P>0.05).The canal preparation time:M3-PRO was(4.54±0.74)min and the Protaper was(6.68±1.10)min(P<0.01).The rate of inter-appointment pain:M3-PRO was 5.7%and the Protaper was 8.5%(P>0.05).No instrument separation appeared.In vitro study:The efficacy of the shaping ability of root preparation of M3-PRO was better than Protaper at 3,4,5,6 mm away from apical.Conclusion M3-PRO can meet the clinical necessity for the curved root canals.