Morphologic characteristics of human cervical pedicles.

摘要: STUDY DESIGN Cervical pedicle morphology was investigated using manual and computed tomography measurements. OBJECTIVES Normal anatomic variations of the cervical pedicles were measured to evaluate their safety as anchors for posterior fixation systems. SUMMARY OF BACKGROUND DATA There have been no measurements on a large number specimens. No study has ever inner diameter. METHODS Fifty-three spinal columns (C2-C7) Euro-American origin identified by age, sex, height (318 vertebrae or 636 pedicles) digital caliper, goniometer, scanning. RESULTS The axis lengths similar from C3 C7 (except shorter C2 pedicles). In horizontal plane, medial inclination followed cord enlargement. sagittal directed superiorly in upper spine inferiorly lower spine. Some had medullary canal (i.e., solid cortical bone: 0.9% C2, 2.8% C4, 3.8% C5 outer width smaller than most pedicles. equal 2 mm 13.2% 72.6% C3, 67.0% 62.3% C5, 51.9% C6, 16.0% C7. 4 8.5% 75.5% 35.8% 6.6% thinnest cortex always lateral cortex, which protects vertebral artery. Measurements projection also taken. CONCLUSIONS These data provide limitations screw use