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目的 研究国人切牙神经管的位置及下颌管、颏管的关系 ,为临床手术提供解剖学数据。方法 据开 60侧湿下颌骨标本 ,对下颌管前端、颏管和切牙神经管进行直接观察和测量。结果 在下颌管前端分出颏管和切牙神经管。切牙神经管的管径为 1.76± 0 .2 6mm ,其下缘至下颌骨下缘的垂直距离为 9.5 3± 1.43mm ,始端对应颏孔前缘的水平距离为 3 .5 4± 0 .72mm。切牙神经管内为切牙神经 ,主要分布到下颌前牙。结论 颏管和切牙神经管由下颌管发出 ,颏管向后、上、外转弯上行 ,切牙神经管向前行
Objective To study the relationship between the position of the neural tube of the incisors and the mandibular canal and the chin tube of the Chinese people and provide anatomical data for the clinical operation. Methods According to the wet 60 mandibular specimens, the frontal mandibular canal, the mandibular canal and the incisor nerve canal were directly observed and measured. The results in the mandibular canal at the front of the chin tube and incisor neural tube. The diameter of the incisor nerve cannula was 1.76 ± 0.226mm, the vertical distance between the lower edge of the incisors and the lower edge of the mandible was 9.53 ± 1.43mm, and the horizontal distance between the leading edge of the incisor nerve and the front edge of the lingual foramen was 3.54 ± 0. 72mm. Incisor nerve incision for the incisors, mainly distributed to the mandibular anterior teeth. Conclusions The mandibular and incisor neural tube are emanated from the mandibular canal. The chin tube goes backwards, upwards and downwards, and the neural tube of the incisor moves forward