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目的 :提供腰椎峡部的应用解剖学资料 ,定量评价腰椎峡部的结构特点及其与毗邻结构的解剖关系 ,探讨腰 5椎弓峡部易患病性的解剖基础。方法 :直接测量 2 0具成人脊柱干燥骨腰段 (L1 ～ L5 )标本的腰椎峡部及其相关结构。结果 :腰椎峡部上缘长度自 L2 (6 .34± 1.2 6 mm)～ L5 (8.6 3± 1.6 0 mm)逐渐增加 ,其下缘长度自 L2 (6 .82± 1.5 4mm)～ L5 (4 .83± 1.5 0 mm)逐渐减小 ;峡部纵径自 L3(11.92± 1.6 2 mm )～ L5 (11.46± 2 .0 3mm)逐渐减小 ;峡部上缘在 L4最薄 (1.5 0± 0 .43mm) ;峡部下缘厚度自 L1 (5 .82± 1.2 6 mm )～ L5 (6 .89± 0 .97mm )逐渐增加。峡部相对于椎弓根的内倾角 L1 ～ L5 (10 3.6± 10 .7度～ 110 .8± 9.6度、尾倾角 L2 ～ L5 (12 5 .3± 7.4度～ 130 .2± 11.0度 )逐渐增加。腰椎峡部的解剖参数与脊柱水平相关 ,并与椎小关节面的方向以及椎弓根的大小密切相关。结论 :该研究结果为临床上第 5腰椎的易患病性提供了解剖学资料 ,有助于临床更好地掌握腰椎峡部螺钉内固定术
OBJECTIVE: To provide anatomic data of lumbar isthmus, quantitatively evaluate the structural features of lumbar isthmus and its anatomic relationship with the adjacent structures, and to explore the anatomic basis of the susceptibility to lumbar isthmus isthmus. Methods: The lumbar isthmus and its related structures in 20 adult patients with spinal cord deformity (L1 ~ L5) were measured directly. Results: The length of the upper edge of the lumbar isthmus gradually increased from L2 (6 .34 ± 1.2 6 mm) to L5 (8.6 3 ± 1.6 0 mm), and the length of its lower edge increased from L2 (6 .82 ± 1.5 4mm) to L5 (4. 83 ± 1.5 0 mm). The isthmial longitudinal diameter of isthmus gradually decreased from L3 (11.92 ± 1.6 2 mm) to L5 (11.46 ± 2.03 mm) ; The thickness of the inferior isthmus gradually increased from L1 (5.82 ± 1.2 6 mm) to L5 (6.89 ± 0.97 mm). The isthmus relative to the pedicle of the inclination angle of L1 ~ L5 (10 3.6 ± 10 .7 degrees to 110 .8 ± 9.6 degrees, tail angle L2 ~ L5 (125 ± 3.30 ~ 130.2 ± 11.0 degrees) gradually , And the anatomical parameters of lumbar isthmus were related to spinal level and closely related to the direction of pedicle surface and the size of pedicle.Conclusion: The results of this study provide anatomic data for the clinical susceptibility of lumbar vertebrae 5 , Help to better grasp the clinical lumbar isthmus screw fixation