摘要
目的 :提供国人寰椎CT测量的数据 ,评价寰椎经后弓侧块螺钉置钉的可行性。方法 :针对寰椎经后弓侧块螺钉固定通道 ,对 5 0具寰椎骨标本进行多个切面的CT断层扫描并测量。结果 :将寰椎后结节中点旁开 18～ 2 0mm的矢状面与后弓下缘的上方 2mm处的冠状面的交线在后弓后方的投影点确定为进钉点 ;于冠状面上保持垂直进钉 ,矢状面上钉头向头侧倾斜约 5° ,是寰椎经后弓侧块螺钉固定较理想的置钉通道。结论 :寰椎具备行经后弓侧块螺钉内固定的条件。
Objective:Normal anatomic properties of atlas were measured in radiology to evaluate the feasibility of screw fixation in atlas via posterior arch and lateral mass.Methods:Fifty dry atlas of Chinese origin were measured with computed tomography scanning aiming at the path of screw fixation.Results:The point of screw penetration was 18～20mm lateral to the midpoint of posterior tubercle and 2mm superior to the inferior edge of posterior arch.The screw directioin chosen was parallel with sagittal plane and about 5° cephalad to the transverse plane.Conclusion:Atlas has the condition of screw fixation via posterior arch and lateral mass.
出处
《中国矫形外科杂志》
CAS
CSCD
2003年第1期34-37,共4页
Orthopedic Journal of China
