后路经寰枢关节螺钉内固定的枢椎解剖学测量

Axial anatomical evaluation of the posterior atlantoaxial transarticular screw fixation

目的:为后路经寰枢关节螺钉内固定术提供解剖学依据。方法:在100例中国成人干燥枢椎标本上,对具有临床意义的数据进行解剖学测量。结果:96.5％的标本椎弓根宽度大于4.5mm,11.5％标本侧块内侧高度小于2.1mm,20.6％标本椎弓根内侧高度小于4.5mm,右侧占8.1％,左侧占12.5％,其中男性15.7％,女性40％的标本椎弓根内侧高度小于4.5mm。螺钉固定的上倾角和内倾角分别为39.2°±5.04°和5.79°±2.45°。结论:21.5％的国人不适合后路经寰枢关节螺钉内固定术,女性明显高于男性,枢椎椎弓根变异较大,术前应进行旁矢状位的薄层CT扫描。

Objective: To provide morphological basis for the posterior atlantoixal transarticular screw fixation. Methods:The clinical significant data were measured on 100 dry axis specimens.Results:The pedicle width of 96.5% specimen was larger than 4.5 mm. In 11.5% specimens, the internal height of the lateral mass was smaller than 2.1 mm. The internal height of the pedicle was smaller than 4.5 mm in 20.6 % of all specimens, while 8.1% was at the right side and 12.5% was at the left side.The internal height of the pedicle was smaller than 4.5 mm in 15.7% male specimens and 10% female specimens.The axis of the screw fixation was found to lie at 39.2°±* 5.04° in the medical direction and 5. 79°± 2. 45° in the superior direction. Conclusion: 21. 5% Chinese are unsuitable for posterior atlantoaxial transarticular screw fixation.