多节段ProDisc-C人工颈椎椎间盘置换5年临床随访报道

目的初步评估多节段ProDisc-C人工颈椎间盘置换术的安全性和有效性。方法回顾分析2010年10月~2011年10月在我院行多节段ProDisc-C人工颈椎间盘置换术患者21例的临床和影像资料,采用VAS评分、日本骨科协会(JOA)脊髓功能评分及颈椎功能障碍指数(NDI)评估患者术后临床疗效,测量患者颈椎整体活动度和置换节段活动度,观察评估患者术后假体位置、颈椎曲度、异位骨化、吞咽功能等情况。结果最终纳入21例多节段ProDisc-C人工颈椎间盘置换术患者,男性13例,女性8例,其中20例行双节段置换,1例患者行三节段置换。术后患者临床症状有明显缓解,JOA、NDI、VAS评分较术前有明显改善,值均0.05,术后3个月患者颈椎整体活动度以及置换节段平均活动度在术后3个月较术前略下降,值均0.05,随后历次随访患者颈椎整体活动度以及置换节段平均活动度较术前无明显差异,值均0.05。未发生假体材料过敏、人工椎间盘假体移位脱出、置换节段过度活动、术后颈椎生理曲度变直以及术后反弓等并发症。结论本研究结果初步表明多节段ProDisc-C人工颈椎间盘置换术是一种安全有效的可以选择的治疗多节段颈椎病的手术方式,能够明显改善患者临床症状,保留置换节段活动度以及颈椎整体活动度,维持颈椎生理曲度,且无假体移位脱出、过度活动、反弓等严重并发症。     

Cervical artificial disc replacement with ProDisc-C: Clinical and radiographic outcomes with long-term follow-up

Cervical artificial disc replacement (ADR) is indicated for the treatment of severe radiculopathy permitting neural decompression and maintenance of motion. We evaluated the clinical and radiographic outcomes in cervical ADR patients using the ProDisc-C device (DePuy Synthes, West Chester, PA, USA) with a 5–9 year follow-up. Data were collected through a prospective registry, with retrospective analysis performed on 24 consecutive patients treated with cervical ADR by a single surgeon. All patients underwent single- or two-level ADR with the ProDisc-C device. Outcome measures included neck and arm pain (visual analogue scale), disability (neck disability index [NDI]), complications and secondary surgery rates. Flexion-extension cervical radiographs were performed to assess range of motion (ROM) of the device and adjacent segment disease (ASD). Average follow-up was 7.7 years. Neck and arm pain improved 60% and 79%, respectively, and NDI had an improvement of 58%. There were no episodes of device migration or subsidence. Mean ROM of the device was 6.4°. Heterotopic ossification was present in seven patients (37%). Radiographic ASD below the device developed in four patients (21%) (one single-level and three two-level ADR). No patient required secondary surgery (repeat operations at the index level or adjacent levels). Fourteen out of 19 patients (74%) were able to return to employment, with a median return to work time of 1.3 months. The ProDisc-C device for cervical ADR is a safe option for patients providing excellent clinical outcomes, satisfactory return to work rates and maintenance of segmental motion despite radiographic evidence of heterotopic ossification and ASD on long-term follow-up.     

ProDisc-C人工颈椎间盘置换术后中长期随访病例的异位骨化情况分析

【摘要】目的：观察ProDisc-C人工颈椎间盘置换术后中长期影像学随访结果。方法：2006年6月～2008年11月我院骨科行单节段ProDisc-C人工颈椎间盘置换术治疗患者中,36例患者获得中长期随访,男22例,女14例,平均年龄44.7±8.1岁（27~62岁）。所有患者过伸过屈位X线片上采用McAfee分级评估假体置换节段异位骨化发生情况和异位骨化位置,采用White方法测量术前和末次随访的置换节段活动度,侧位X线片上采用Kellgren-Lawrence分级评估手术节段术前退变情况,分析其与末次随访时异位骨化的关系。结果：平均随访时间为108.6±27.0个月。36个手术节段术前活动度为9.0°±3.6°,末次随访时活动度为6.4°±3.2°,较术前明显降低（P＜0.05）。36个手术节段中有25个（69.4%）节段出现异位骨化,根据McAfee异位骨化分级,其中Ⅰ级异位骨化1个节段,Ⅱ级6个节段,Ⅲ级14个节段,Ⅳ级4个节段。出现异位骨化的25个节段中,异位骨化主要位于假体后方者11例,异位骨化主要位于假体前方者14例。手术节段术前退变Kellgren-Lawrence分级与异位骨化无明显相关性（P＞0.05）。结论：ProDisc-C人工颈椎间盘置换术后中长期随访异位骨化发生率高,降低了置换节段的活动度。     

单节段ProDisc-C颈椎人工椎间盘置换术对颈椎曲度和活动度的影响

目的:观察单节段ProDisc-C颈椎人工椎间盘置换术后置换节段活动度和颈椎曲度变化情况,分析ProDisc-C人工椎间盘置换术的效果.方法:2006年6月～2008年9月对53例颈椎病患者行单节段前路减压、ProDisc-C人工椎间盘置换术,置换节段C3/4 7例,C4/5 10例,C5/6 27例,C6/7 9例.应用医学影像存储与传输系统(PACS)测量术前和末次随访时置换节段活动度(ROM)、置换节段脊柱功能单位(functional spinal unit,FSU)Cobb角和颈椎整体曲度(C2～C7 Cobb角).结果:随访3～36个月,平均13.8个月.术前置换节段ROM为8.60°±3.7°,末次随访时为9.7°±3.5°,有统计学差异(P<.05);术前PSU Cobb角(前凸为正值)为0.1°±4.8°,末次随访时为3.6°±4.5°,有统计学差异(P<.05);术前颈椎整体曲度为7.0°±10.2°,末次随访时为8.0°±10.4°,无统计学差异(P>.05).结论:单节段ProDisc-C颈椎人工椎间盘置换术后置换节段活动度较术前增大,颈椎整体曲度无明显变化,FSU前凸增大,对于术前病变节段FSU生理前凸变小或轻度后凸的拟行颈椎人工椎间盘置换的患者可选择ProDisc-C假体.