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目的观察藏族成人X线曲面体层摄影下颌神经管的走型及影像学特点,为种植手术提供指导。方法选择标准条件下曲面体层摄影片200例,测量曲面体层摄影片下颌神经管冠根向直径及颏孔位置并记录部位。结果大部分下颌管及颏孔位置可经曲面体层摄影显现,冠根向直径从后向前逐步降低,与汉族无显著性差异。结论藏族成人线曲面体层摄影下颌管及颏孔与汉族差异不大,而骨密度稍高。
Objective To observe the walking and imaging features of mandibular canal in Tibetan adult X-ray tomography and provide guidance for implant surgery. Methods Totally 200 cases of surface tomography under standard conditions were selected to measure the root diameter and the position of mental foramen of the mandibular canal in corneal slice. Results Most of the mandibular canal and mental foramen position could be visualized by surface tomography. The diameter of coronal root gradually decreased from posterior to posterior, which was not significantly different from Han. Conclusion Tibetan adult line surface tomography of mandibular canal and mental foramen and Han did not differ much, while the bone density slightly higher.