Mtwo机用镍钛锉与手用不锈钢K锉根管预备效果观察

目的评价机用Mtwo镍钛锉预备根管的临床效果。方法选取需行根管治疗的患牙50颗,随机分为试验组和对照组,每组25颗,分别采用机用Mtwo镍钛锉和手用不锈钢K锉进行根管预备,两组均采用冷侧压法充填根管,比较两组的根管预备时间,根管预备术后疼痛反应和根管充填质量。结果试验组根管预备时间平均为(6.95±0.16)min/根,对照组平均为(12.84±0.22)min/根,试验组明显少于对照组,差异有统计学意义(t'=-166.47,P0.001);试验组根管预备术后疼痛发生率13%明显低于对照组36%,差异有统计学意义(Z=-2.00,P0.05);试验组根管恰填率92.31%,对照组根管恰填率78.69%,两组差异有统计学意义(χ2=4.76,P0.05)。结论相比不锈钢K锉,MTWO机用镍钛锉预备根管能较好地保持根管解剖形态,减少了术后疼痛,省时、高效、提高了根充效果,值得临床推广。

Clinical observation between Mtwo rotary nickel- titanium files and stainless steel K files in root canal preparation

Objective To evaluate clinical efficacy of root canal preparation of new rotary nickel-titanium files-Mtwo.Methods Fifty teeth were randomly divided into experimental group and control group.In root canal preparation,Mtwo rotary nickel-titanium files were used in the experimental group,while the hand stainless steel K-files were applied in the control group.In both groups root canals were obturated by lateral compaction technique.The time for root canal preparation,complications after root canal preparation and obturated effect were compared.Results With regard to root canal preparation time,experimental group was significantly shorter than the control group.After root canal preparation,the experimental group had fewer complications than the control group.Conclusion Mtwo Nickel-titanium instruments in root canal preparation can result in a very good maintenance of root canal anatomy and reduce postoperative pain,and it is time-saving and efficient,which is worthy of clinical application.