CD、AF椎弓根内固定治疗胸腰段椎体不稳定骨折

目的 评价CD、AF椎弓根内固定系统治疗胸腰段椎体不稳定骨折疗效。方法 采用CD（33例）、AF（32例）椎弓根内固定治疗胸腰段椎体不稳定骨折。必要时切除椎板减压，直视下嵌击性复位。行横突间植骨融合。结果 65例获3-29个月随访，行X线及CT复查，骨折脱位复位率达95％。CD组中有2例断钉，3例钉棒松动，椎体复位高度丢失4～6mm。AF组无1例断钉及钉棒松动。结论 CD、AF椎弓根内固定系统治疗胸腰段椎体不稳定骨折，固定牢靠，椎体高度再丢失少。AF较CD操作更加简单、可靠。

Unstable thoracolumbar fractures treated with CD, AF pedicle internal fixators

Objective To investigate the CD, AF pedicle internal fixators in the treatment of unstable thoracolumbar fractures. Methods 33 cases were treated with CD, 32 with AF. Laminectomy decompression and reduction under direct vision were performed if necessary. Intertransverse bone graft was carried out for fusion.Results 65 cases got follow-up from 3 to 29 months and the reduction rate was 95% by the examination of X-ray and CT. Screw breakage occurred in 2 cases, screw loosening in 3, and vertebral height loss was 4-6 mm among the CD group. No screw breakage or loosening was found in AF group. Conclusions Both CD and AF pedicle internal fixators are reliable and effective for unstable thoracolumbar fractures. AF is simpler and more reliable than CD.