目的：探讨经改良的上胸椎前方手术入路切除上胸椎椎体，治疗上位胸椎病变的方法与初步结果。
Objective: To evaluate the procedure and the preliminary results of the resection of upper thoracic vertebrae through modified anterior cervico thoracic approach.
结论：胸椎椎板倾斜角和黄韧带所受张力可能是胸椎黄韧带骨化多发于下胸段的解剖学和力学因素之一。
Conclusions: thoracic LSA and tension acting on ligamentum flavum may be the anatomical and biomechanical factors for the predilection on lower thoracic spine of TOLF.
方法：对100套华北地区出土自然干燥胸椎1187个的椎孔进行测量和观察。
Methods: 1187 thoracic vertebrae from 100 skeletons (naturally dried) unearthed in the area of North China were measured and observed.
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