论文部分内容阅读
目的:为提供腰椎峡部CT解剖学资料。方法:50例正常成年人腰椎峡部定位CT扫描,观察与腰椎峡部裂行多孔面螺钉进针方向、角度等的有关数据。结果:L_(1～3)两侧峡部外侧宽基本接近,平均为26.3±4.4mm;L_4宽度略增,L_5宽度最大,为40.3±5.8mm。L_(1～3)与L_5间存在显著性差异(P<0.05)。在矢状面上,L_(1～4)峡部的走行方向基本上呈垂直向下,连接于上下关节突之间,L_5峡部明显向后上倾斜,故在上关节突与峡部之间形成平均角度为103°±7°(90°～110°)的仰角。在冠状位上,随着椎间孔渐增大,腰椎峡部逐渐外移.L_5峡部极度外移,使下关节突移至上关节突外下方。结论:作L_5峡部裂多孔面螺钉内固定时,应考虑上关节突与峡部间呈向后上方的仰角。
Objective: To provide lumbar isthmus CT anatomy information. Methods: Fifty normal adult lumbar isthmus position CT scans were performed to observe the direction and angle of lumbar isthmic foraminoplasty screws. Results: The lateral width of lateral isthmus on both sides of L_ (1 ~ 3) was close to the average of 26.3 ± 4.4mm. The width of L_4 slightly increased and the width of L_5 was the largest, which was 40.3 ± 5.8mm. There was a significant difference between L_ (1 ~ 3) and L_5 (P <0.05). In the sagittal plane, L_ (1 ~ 4) isthmus walking direction is basically vertical down, connected between the upper and lower articular processes, L_5 isthmus significantly backward tilt, so in the articular process and the isthmus formed between the average The angle is an elevation of 103 ° ± 7 ° (90 ° -110 °). In the coronal position, with the foramen gradually increased, lumbar isthmus gradually outward.L_5 isthmus extreme relocation, so that the lower joint suddenly moved to the underside of the superior articular process. Conclusion: For the L_5 isthmic foraminoplasty screw fixation, should consider the elevation between the superior articular process and the isthmus posterior upward.