BACKGROUND:Laminectomy may cause kyphotic postoperative deformity in the cervical region leading to segmental instability over time. Laminoplasty may be an alternative procedure to laminectomy, as it protects the spine against post-laminectomy kyphosis; however, similar to laminectomy, laminoplastymay cause sagittal plane deformities by destructing or weakening the dorsal tension band. OBJECTIVE:Using finite element analysis (FE), we attempted to determine whether a posterior motion preservation system (PEEK posterior rod system concept) could overcome the postoperative complications of laminectomy and laminoplasty and eliminate the side effects of rigid posterior stabilization in the cervical region. METHODS:We compared PEEK rods in four different diameters with a titanium rod for posterior cervical fixation. The present study may lead to motion preservation systems of the cervical vertebra. RESULTS:When PEEK rod is compared with titanium rod, considerable increase in range of motion is observed. CONCLUSIONS:PEEK rod-lateral mass screw instrumentation systems may be useful in motion preservation surgery of the posterior cervical region.

中文翻译：

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颈椎运动保留手术的新概念：用于颈后区域的 PEEK 棒。

背景：椎板切除术可能会导致颈椎术后后凸畸形，随着时间的推移导致节段不稳定。椎板成形术可能是椎板切除术的替代手术，因为它可以保护脊柱免受椎板切除术后的脊柱后凸；然而，与椎板切除术类似，椎板成形术可能通过破坏或削弱背侧张力带而导致矢状面畸形。目的：使用有限元分析（FE），我们试图确定后路运动保留系统（PEEK 后路杆系统概念）是否可以克服椎板切除术和椎板成形术的术后并发症，并消除颈椎区域刚性后路稳定的副作用。方法：我们比较了四种不同直径的 PEEK 棒与钛棒用于颈椎后路固定。目前的研究可能会导致颈椎的运动保存系统。结果：当 PEEK 杆与钛杆相比时，观察到运动范围有相当大的增加。结论：PEEK棒-外侧质量螺钉器械系统可用于颈后区的运动保留手术。