CAJ | 학술논문

目的：：利用树脂模拟根管比较机用 ProTaper Next、ProTaper Universal、K3XF、Twisted File 和Hyflex CM在弯曲根管内的成形能力。方法：使用机用 ProTaper Next、ProTaper Universal、K3XF、Twisted File和Hyflex CM预备五组模拟树脂根管,预备过程中记录器械变形及分离的发生,预备完成后测量预备前后根管中轴线的变化。结果：根管中轴线的变化量：在根尖部和根中部,K3XF、Twisted File和 Hyflex CM三组均少于 ProTaper Next 和 ProTaper Universal 组( P<0.05)；在根中部, ProTaper Next 组小于ProTaper Universal组(P<0.05)；在根冠部,Hyflex CM组小于其他各组(P<0.05)。结论：ProTaper Next、K3XF、Twisted File( TF)和 Hyflex CM在预备弯曲根管时,均能够较好地维持根管原始走向,防止根尖偏移,是较理想的弯曲根管预备器械。
목적：：이용수지모의근관비교궤용 ProTaper Next、ProTaper Universal、K3XF、Twisted File 화Hyflex CM재만곡근관내적성형능력。방법：사용궤용 ProTaper Next、ProTaper Universal、K3XF、Twisted File화Hyflex CM예비오조모의수지근관,예비과정중기록기계변형급분리적발생,예비완성후측량예비전후근관중축선적변화。결과：근관중축선적변화량：재근첨부화근중부,K3XF、Twisted File화 Hyflex CM삼조균소우 ProTaper Next 화 ProTaper Universal 조( P<0.05)；재근중부, ProTaper Next 조소우ProTaper Universal조(P<0.05)；재근관부,Hyflex CM조소우기타각조(P<0.05)。결론：ProTaper Next、K3XF、Twisted File( TF)화 Hyflex CM재예비만곡근관시,균능구교호지유지근관원시주향,방지근첨편이,시교이상적만곡근관예비기계。
Objective:To compare the shaping ability of five Ni-Ti rotary endodontic instruments,ProTaper Next,ProTaper Universal,K3 XF,Twisted File and Hyflex CM in curved root canal by using simulated resin root canals.Methods:Five groups of simulated resin root canals were prepared by ProTaper Next,ProTaper Universal, K3XF,Twisted File and Hyflex CM respectively.During the preparation,incidences of instrument deformation and separation were recorded.After the preparation was completed,the change in medial axis of the root canals was respectively measured.Results:Changes of medial axis were smaller in the three groups with K3XF,Twisted File and Hyflex CM than the groups with ProTaper Next and ProTaper Universal in the coronal and middle third of the root canals (P<0.05).The amount of axis offset were less in ProTaper Next group than ProTaper Universal group in the middle third of the root canals (P<0.05).They were less in the Hyflex CM group than the other groups in the coronal third of the root canals (P<0.05).Conclusion:ProTaper Next,K3XF,Twisted File and Hyflex CM files can well maintain the original path of root canals during preparation of curved root canals and avoid apical aberration,and therefore are ideal equipments for curved root canal preparation.