的制造及其应用技术 :黄韧带骨化症(ossificationofligamentumflavum paper shows that s1p is essential to endochondral ossification 形成初级骨小梁 最早形成骨组织的部位称为 骨化中心(ossification osteogenic differentiation during intramembranous ossification heterotopicossificationsizeafterspinalcorinjuryacaseseries