胸腰椎骨折椎弓根内固定治疗的疗效评定

Long-term results of thoracolumbar fracture treatment with AF pedicle system

目的探讨轴形内固定(AF)椎弓根系统治疗胸腰椎骨折的疗效。方法对1996～2000年采用AF系统治疗的60例胸腰椎骨折病例进行回顾总结。随访3～6年,平均4年。结果神经功能恢复按ASIA分为A、B、C、D、E5级,其中恢复两个级差的27例,恢复一个级差的33例;与正常相比伤椎高度平均矫正95.1%,远期矫正丢失率为19.7%,伤椎固定节段上下椎间隙部分变窄,上间隙较重。结论后路AF系统治疗胸腰椎骨折对于神经功能、伤椎高度的恢复疗效肯定,但存在内固定断裂,矫形丢失等问题,未充分植骨及内固定未及时取出是主要原因。

Objective To study the long term results of thoracolumbar fractures treatment with AF (atlas fixator) pedicle system. Methods The clinical results of 60 cases of thoracolumbar fractures treated with AF pedicle system from 1996 2000 were analyzed retrospectively. Results The follow ups lasted from 3 to 6 years, averaging 4 years. The neurological function improved by at least 2 ASIA grades in 27 cases and by 1 ASIA grade in 33 cases. The correction of the vertebral body height averaged 95.1%, and the correction loss averaged 19.7%. Degeneration and narrowing of the disc space next to the fractured vertebrae were common, and correction loss was most evident at the upper disc spaces. Conclusions The AF pedicle system can achieve good long term clinical results for the recovery of neurological function and the vertebral body height. But the rates of implant failure and correction loss are still high probably due to deficiency of bone grafting and delayed implant removal.