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目的研究中上颈椎侧块与寰椎椎弓根的位置关系,建立以中上颈椎侧块为解剖标志的寰椎椎弓根螺钉进钉点定位技术。方法20具尸体标本,分别测量寰椎椎弓根和中上颈椎侧块的内缘、中点、外缘与正中矢状面的垂直距离,通过分析测量值间的关系,建立寰椎椎弓根螺钉进钉定位技术。结果C2～4侧块的内缘分别在寰椎椎弓根内缘外侧0.37mm、0.27mm、0.24mm处;C24侧块的中点分别在寰椎椎弓根中点外侧1.18mm、1.41mm、1.74mm处;C2～4侧块的外缘分别在寰椎椎弓根外缘外侧1.96mm、2.54mm、3.24mm处。结论中上颈椎侧块与寰椎椎弓根间存在较恒定的解剖位置关系,C3和C4侧块与枢椎侧块一样,可作为术中确定寰椎后弓显露范围和判断寰椎椎弓根螺钉进钉点的解剖学标志。
Objective To study the relationship between the upper cervical lateral mass and the atlas pedicle, and to establish the atlas pedicle screw fixation technique based on the mid-upper cervical lateral mass as the anatomical landmark. Methods Twenty specimens of the cadaver were used to measure the vertical distance between the medial, midpoint, and medial sagittal planes of the atlas and the mid-upper cervical lateral mass respectively. By analyzing the relationship between the measured values and establishing the atlas vertebra Root screws into the nail positioning technology. Results The inner edge of C2 ~ 4 lateral mass was 0.37mm, 0.27mm and 0.24mm outside the internal margin of atlas pedicle, while the midpoint of C24 lateral mass was 1.18mm and 1.41mm outside midpoint of pedicle of atlas , 1.74mm; C2 ~ 4 lateral mass of the outer edge of the atlas pedicle were 1.96mm, 2.54mm, 3.24mm outside. Conclusion There is a relatively constant anatomical relationship between the upper cervical lateral mass and the atlas pedicle. The C3 and C4 lateral mass are the same as those of the lateral mass of the axial mass, which can be used to determine the scope of atlas posterior arch and to determine the atlas pedicle Anatomy of the root screw into the nail point.