PEEK椎间融合器在腰椎滑脱中的应用

目的探讨PEEK椎间融合器加椎弓根内固定技术治疗腰椎滑脱症的临床疗效。方法41例腰椎滑脱患者采用全椎板减压、椎弓根器械复位固定、椎体间放入PEEK融合器植骨融合。结果全部获得随访，时间12～54个月，40例植骨获得椎体间融合，融合时间6～24个月，融合率97．6％。临床疗效按Macnab标准评定：优17例，良21例，可2例，差1例，优良率达92．7％。结论PEEK椎间融合器植骨融合是一种较为实用的融合方式，避免了取自体髂骨带来的问题，在生物力学上保持腰椎生理前凸、提高腰椎生物力学功能，对恢复脊柱稳定性具有积极作用。

PEEK cages in spondylolisthesis with pedicle screw system and posterior lumbar intervertebral fusion

Objective To review the experience on patients with spondylolisthesis treated by pedicle screw internal fixation system and to observe the efficiency of posterior lumbar intervertebral fusion（PLIF） with PEEK cages. Methods 41 cases of spondylolisthesis were treated with methods as following： （1） Directive decompression towards to the compressed lesion area to relieve the compression factors. （2） Reduction and fixation for slipped vertebrae to restore the normal anatomical curve of lumbar spine. （3）PLIF was performed by implanting PEEK cages. Results 40 cases got interbody fusion in 6 -24 months, and the fusion rate was 97.6%. Follow-up period was from 12 to 54 months. 17 cases obtained excellent results, 21 good, 2 fair and 1 poor. Satisfactory reduction and fusion of vertebrae were obtained in these cases. The excellent and good rate was 92.7%. Conclusions Application of PLIF with PEEK cages and pedicle screw fixation has the advantage of stabilizing both anterior column and posterior column of lumbar spine. It restores the lumbar intervertebrae space and obtains high fusion. And it also maintains the normal lordosis and improves the biomechanical function of lumbar spine.