Bryan人工颈椎间盘置换术后疗效评价及并发症分析

目的:观察Bryan人工颈椎间盘置换治疗颈椎间盘突出症临床疗效和并发症情况.方法:2005年1月至2008年12月,采用Bryan人工颈椎间盘置换治疗颈椎间盘突出症患者39例,男20例,女19例；年龄35～59岁,平均47岁.临床症状以脊髓压迫为主者20例,神经根性症状为主者19例.单节段置换35例,双节段置换4例.术后定期随访,通过颈椎动态X线片,观察植入假体位移和活动度、颈椎生理曲度、异位骨化及假体融合情况.依照Odom's标准和JOA评分评估神经功能,采用NDI(颈椎残障功能量表)评定术后临床症状和日常功能状态.结果:术后随访16-36个月,平均24个月.神经功能明显改善,以神经根性症状为主的上肢放射痛全部缓解.未发现假体前后位移大于2 mm的患者,术后置换假体前后屈伸活动范围(8.5±1.8)°,左右侧屈活动范围分别为(3.5±1.2)°和(3.3±1.5)°,颈椎生理曲度明显改善或恢复正常.3例发生异位骨化,2例出现假体融合.Odom's临床评定:优25例,良9例,一般5例.JOA评分由术前的(8.26±1.32)分增加至终末随访时的(15.71±1.89)分.NDI评分从术前的(43.7±3.8)分降低至终末随访的(20.1±2.9)分.结论:人工颈椎间盘置换治疗颈椎间盘突出症有较好的临床疗效,术后神经功能恢复良好,颈椎具有较好的稳定性和活动度.但该手术有其特有的并发症,术后异位骨化和假体融合发生率较高,应重视手术适应证选择及手术操作规范.

Curative effect evaluation and complication analysis of Bryan artificial cervical disc replacement

Objective: To observe the curative effects and complications of Bryan cervical disc replacement for cervical disc herniation. Methods: From Jannary 2005 to December 2008,39 patients with cervical disc herniation were treated with Bryan cervical disc replacement. There were 20 males and 19 females,with an average age of 47 years old (ranged,35 to 59). Spinal compression symptom (20 cases) and nerve root symptom (19 cases) were main clinical symptoms. Single level disc was replaced in 35 cases and two-level replaced in 4 cases. Offset and activity of prosthesis,cervical physiological curvature,heterotopic ossification,prosthetic fusion were observed by dynamic X-ray. According to Odom's standard and JOA score,nerve function were evaluated;and depending on NDI standard,clinical symptom and daily function status were recorded. Results: All the patients were followed up from 16 to 36 months with an average of 24 months. Nerve function obviously improved and radiating pain of upper limb completely relieved. No patient with prosthetic anterior-posterior offset more than 2 mm was found. Prosthetic flexion and extention angle was(8.5±1.8)°,left and right flexion range respectively were (3.5±1.2)° and (3.3±1.5)°. Cervical physiological curvature improved obviously or recovered normally. Three cases occurred in heterotopic ossification and 2 cases occurred in prosthetic fusion. According to Odom's standard,25 cases got an excellent results,9 good,5 fair,the rate of excellent and good was 87.2%. JOA score increased from preoperative(8.26±1.32) to (15.71±1.89) at final follow-up and NDI decreased from preoperative(43.7±3.8) to (20.1±2.9) at final follow-up. Conclusion: Treatment of cervical disc herniation with Bryan cervical disc replacement can get the good curative effects,which can obtain good nerve functional recovery,cervical stability and activity. Nevertheless,the operation has typical complication such as heterotopic ossification and prosthetic fusion. Thus,it is important in chosing indication and operative procedure.