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《Chinese Journal of Conservative Dentistry》 2007-02
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Experimental study of root canal deviation during instrumentation of the curved root canals

GU Yong-chun,ZHOU Pei-gang,DING Yue-feng,ZHONG Yan(First People′s Hospital of Wujiang,Wujiang 215200,China)  
AIM:To evaluate root canal deviation during instrumentation of curved root canals.METHODS: 8 curved artificial root canals were prepared with stainless steel K files by routine technique. The root canals were photographed by digital camera.The images were analysed by the software Image-Pro Plus.The shapes and positions of the root canals were measured and analysed.RESULTS: The curved root canals were straightened step by step during the process of canal preparation.The angles of the root canal curvature decreased while the radius of the curvature and the areas of the canal contour increased.Apical zipping and canal elbow were created.3 over-cutting zones appeared at the wall of the root canals.CONCLUSIONS: The direction and degree of the canal deviation varied with the level of the root canals during instrumentation of curved root canals.Familiar of the morphology of curved root canal and mechanical features of canal instruments would be helpful for avoiding canal deviation.
【CateGory Index】: R781.05
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