摘要
目的 :测量C3～ 7椎弓根各径线的数据 ,探讨颈椎椎弓根螺钉置钉时按照轴线置入的必要性。方法 :8具颈椎标本 ,经螺旋CT(ElscintCTTwinFlash)在 1mm厚度断层扫描后 ,图像输入到计算机软件 (SiliconGraphicsO2工作站 ) ,测量C3～ 7椎弓根各径线的数据 ,根据数据模拟出椎弓根的形态特点 ,分别计算在未考虑螺钉直径与用 3 .0mm螺钉情况下进行置钉的角度安全范围。结果 :在未考虑螺钉直径下置钉 ,C3～ 7在横断面的平均最大安全范围分别是 18.68°、2 0 .41°、2 2 .43°、2 2 .5 0°、2 7.5 5° ,在矢状面分别为2 7.5 5°、3 0 .3 1°、2 7.70°、2 9.0 3°、3 4.88° ,用直径 3 .0mm螺钉置入时 ,在横断面的平均最大安全范围是7.2 5°、8.5 8°、10 .98°、13 .0 9°、15 .49° ,在矢状面是 16.3 5°、18.69°、16.40°、18.2 6°、2 3 .13° ,这些数据的差异具有显著性 (P <0 .0 5 )。结论 :颈椎椎弓根螺钉置入角度的最大安全范围小 ,有必要在置钉时做到真正的精确量化与精细操作 ,严格按照个体化的椎弓根轴线方向置钉。
Objective:To measure the linear parameters of the cervical pedicles from CT scan, and probe the necessity of the transpedicular screw fixation according to the axis of the cervical pedicle. Methods:The spiral computed tomography scan (Elscint CT Twin flash) at the section of 1mm of 8 cervical specimens were taken, then the image data were sent to the software (Silicon Graphics O2 working station) to measure the linear parameters of pedicles from C_ 3～7 , and simulate the topography of the cervical pedicle, calculate respectively the inserting angular safe range with and without the consideration of the diameter of the screw. Results:Neglecting the diameter of the screw, the average inserting angular safe range of C_ 3～7 in the transverse plane were 18.68°、 20.41°、22.43°、 22.50°、 27.55°respectively, and27.55°、 30.31°、 27.70°、 29.03°、 34.88° in the sagittal plane respectively; then concerning the diameter of the screw(3.0 mm), the data became 7.25°、 8.58°、 10.98°、 13.09°、 15.49° and 16.35°、 18.69°、 16.40°、 18.26°、 23.13° respectively. Conclusion:The inserting safe range of transpedicular screw fixation in the cervical spine is quite narrow, while transpedicular screw fixation must be strictly operated according to the axis of the pedicle.
出处
《中国临床解剖学杂志》
CSCD
北大核心
2004年第2期186-189,共4页
Chinese Journal of Clinical Anatomy
关键词
颈椎
椎弓根
内固定
螺旋CT
cervical vertebrae
pedicle
internal fixation
spiral-CT
