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目的 :探讨腰椎上关节突外缘的形态特点及其与椎弓根中心的关系。方法 :对 10 0套成人干燥腰椎骨标本上关节突乳突的形态特点及其外缘切线与椎弓根外侧骨皮质及中心进行了观测。结果 :L110 0 % ,L2 98.1% ,L396 .4% ,L4 4 5 .8% ,L58.1%上关节突外缘切线位于椎弓根中心的外侧。上关节突外缘切线距椎弓根外侧骨皮质的距离为L1(1.8± 0 .7)mm ,L2 (1.5± 0 .5 )mm ,L3(2 .3± 1.5 )mm。结论 :上关节突外缘多位于椎弓根中心的外侧 ,以它做为椎弓根螺钉进钉的定位标志过于偏外。
Objective: To investigate the morphological characteristics of the lumbar facet joint and its relationship with the pedicle center. Methods: Morphological characteristics of the articular process papillae in 100 adult lumbosacral bone specimens, the tangent of the outer edge and the cortical bone and the center of the lateral pedicle were observed. Results: L110 0%, L2 98.1%, L396.4%, L4 45.8%, L58.1% The lateral tangent of the superior articular process was located on the lateral pedicle center. The distance from the tangent of the superior articular process to the lateral cortical bone was L1 (1.8 ± 0.7 mm), L2 (1.5 ± 0.5 mm), and L3 (2.3 ± 1.5 mm). Conclusions: The outer edge of the superior articular process is located outside the center of the pedicle. Using it as the positioning mark of pedicle screw into the nail is too eccentric.