第二骶骨置钉的解剖学研究及固定的可行性与安全性_基础医学 关键词] 第二骶骨；螺钉；解剖；骶后孔 [gap=1227]Key words] The second sacral; Screw; Anatomy; Posterior sacral foramina
双语例句
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Objective To study the influence of excision of sacrum through the superior and inferior margins of the 1st to 3rd posteriorsacralforamina on area of sacroiliac joint surface.