后天性腰椎峡部不连发生机制的解剖学分析  

Anatomical analysis on the mechanism of acquired lumbar vertebral isth-mus monunlon

作　　者：孙广林[1] 孙义清[1] 吴玉琳[1] 孔祥玉[1] 杜心如[1] 

机构地区：[1]承德医学院解剖学教研室,承德医学院附属医院骨科

出　　处：《中国临床解剖学杂志》1994年第1期21-23,共3页Chinese Journal of Clinical Anatomy

摘　　要：对５００侧腰椎峡部的形态和结构进行了观察。结果显示Ｌ４和Ｌ５峡部与其它腰椎在形态学上的差别。据所发现的解剖学特点，分析了后天性腰椎峡部不连的原因：①Ｌ４（２６％）和Ｌ５（７６％）的峡部为新月形柱，应力作用下易断裂；②Ｌ５峡部的背内侧骨密质菲薄，骨小梁呈横向排列，骨质构造不坚，应力作用易使其断裂；③Ｌ５峡部明显外展且与上关节突间形成６０°～１１０°的仰角，在剪力作用下，常易发生断裂。he shape and structure of lumbar vertebral isthmus are investigated in 500 lumbar verte-brae, The results show that the isthmi of the 4th and the 5th lumbar vertebra differ from otherlumbar vertebrae,The factors causing acquired lumbar vertebral isthmus fracture and non-union are analyzed as follows,(1)A high percentage of L4(26%)and L5(76%)lumbar vertebralisthmi takes a shape of crescent column.(2) The medial─dorsal side of L5 isthmus is covered with a thin layer of compact bone substance and the arrangement of trabeculae is in a transversedirection.( 3 )The L5 isthmus is spread laterally and forms a srpine angle of 90 to 110 degrees to the superior articular process.

关 键 词：腰椎不连 峡部 脊柱疾病 解剖学 

分 类 号：R323.43[医药卫生—人体解剖和组织胚胎学]