颈椎后路植入物固定修复多节段脊髓型颈椎病：可改善症状但降低了颈椎活动度

背景：颈椎后路单开门椎管成形单侧侧块内固定与全椎板切除双侧侧块内固定通过扩大椎管有效容积治疗脊髓型颈椎病，并且两种固定方法的疗效和安全性并不清楚。 目的：观察颈后路单开门椎管成形单侧侧块内固定与全椎板切除双侧侧块内固定治疗多节段脊髓型颈椎病，植入物与宿主生物相容性。 方法：回顾性分析117例多节段(≥3个)脊髓型颈椎病患者病历资料，分为单开门组65例和全椎板切除组52例，分别采用单开门椎管成形单侧侧块内固定及全椎板切除双侧侧块内固定治疗。对两组患者固定前及末次随访进行JOA评分、估算恢复率，观察神经恢复情况，并通过侧位X射线片测量颈椎曲度指数和颈椎活动度进行评估。 结果与结论：两组平均随访时间28个月(12-59个月)。两组均无C5神经根麻痹患者。两组末次随访JOA评分均高于固定前(P < 0.01)。两组间JOA评分、恢复率、末次随访颈椎曲度指数比较差异均无显著性意义(P > 0.05)。两组末次随访颈椎活动度均低于固定前(P < 0.01)。结果说明，颈后路单开门椎管成形单侧侧块内固定与全椎板切除双侧侧块内固定在改善神经功能、缓解疼痛、减少并发症上有相似的疗效，但一定程度上降低了颈椎活动度。中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程 

Cervical posterior implant fixation for multi-segment cervical spondylotic myelopathy: improves symptoms but diminishes cervical range of motion

BACKGROUND:Cervical Open-door laminoplasty with unilateral mass screw fixation and laminectomy with bilateral mass screw fixation are both procedures that treat cervical spondylotic myelopathy by expanding the space available for the spinal cord. Effectiveness and safety of two operative methods remain unclear. OBJECTIVE:To investigate the biocompatibility of implant and host between open-door laminoplasty with unilateral mass screw fixation and laminectomy with bilateral mass screw fixation to treat multi-segment cervical spondylotic myelopathy. METHODS:Data of 117 patients with multi-segment cervical spondylotic myelopathy (≥ 3 segments) were retrospectively analyzed. Sixty-five cases underwent open-door laminoplasty with unilateral mass screw fixation (laminoplasty group). Fifty-two cases underwent laminectomy with bilateral mass screw fixation (laminectomy group). Clinical outcomes were evaluated by the Japanese Orthopaedic Association scoring system and by recovery rate. Cervical curvature index and cervical range of motion were assessed by X-ray films in both groups. RESULTS AND CONCLUSION:The average follow-up time was 28 months (range 12-59 months) in both groups. No C5 nerve root palsy occurred in the two groups. Japanese Orthopaedic Association scores were greater during final follow-up than pre-fixation in both groups (P < 0.01). No significant difference in Japanese Orthopaedic Association score, recovery rate, and final follow-up cervical curvature index was detected in both groups (P > 0.05). Cervical range of motion was lower during final follow-up than pre-fixation in both groups (P < 0.01). Results confirmed that open-door laminoplasty with unilateral mass screw fixation and laminectomy with bilateral mass screw fixation have similar effectiveness in the improvement of neurological function, relieving pain and reducing complications, but will greatly reduce the cervical range of motion.