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目的:观察离体下颌第一前磨牙根管形态,为临床进行根管治疗提供参考。方法:采用牙体硬组织切片法对拔除的下颌第一前磨牙进行连续横截切片,并在放大镜下观察其根管形态。结果:165颗离体下颌第一前磨牙根管形态I型占61.82%I、I型占3.03%I、II型占5.45%I、V型占4.85%、V型占23.64%、C型根管占1.21%。结论:下颌第一前磨牙根管形态复杂,根中、根尖1/3双根管发生率较高,临床治疗应慎防遗漏。
OBJECTIVE: To observe the morphology of root canal in the first premolars of mandibular incisors, and to provide reference for the clinical treatment of root canal. Methods: The mandibular first premolar was extracted from the mandibular first premolar by dental hard tissue biopsy. The morphology of the root canal was observed under a magnifying glass. Results: The root canal morphology of 165 mandibular first premolars accounted for 61.82%, type I 3.03% I, type II 5.45% I, type V 4.85%, type V 23.64%, type C Tube accounted for 1.21%. Conclusions: The shape of root canal of mandibular first premolar is complicated. The incidence of root canal and apical 1/3 double root canal is high, so clinical treatment should be carefully avoided.