Bryan人工颈椎间盘置换对颈椎功能影响的临床分析

目的 探讨Bryan人工颈椎间盘置换手术对颈椎功能的影响.方法 对2003年12月至2007年8月施行的164例患者200个椎间盘的人工颈椎间盘置换手术进行回顾性分析.164例患者中,男性102例,女性62例,年龄25～70岁,平均47岁;单间隙置换132例,双间隙置换28例,三间隙置换4例.均采用Bryan人工颈椎间盘假体.手术严格按照Bryan人工颈椎间盘假体植入的标准操作程序进行.术后颈托外固定2周.结果 随访时间2～44个月,平均26个月.JOA评分改善率56%.椎间活动度:矢状位术前平均活动度14.4°,术后1周5.7°,末次随访时平均14.7°,与手术前相比差异无统计学意义.邻近间隙矢状位术前平均活动度10.9°,术后1周5.5°,末次随访时平均8.2°,主要是由上邻接间隙的活动度没有达到术前水平所致.患者满意度94%.1例患者术后6个月假体松动,以后稳定;1例患者术后7个月假体发生1 mm下沉,以后稳定;3例后方融合.无前方融合、食管损伤、喉返神经损伤以及再手术病例.手术操作单间隙平均90 min,双间隙平均130 min.结论 人工颈椎间盘置换手术临床疗效良好.

Functional evaluation of the cervical spine after Bryan artificial disc replacement

OBJECTIVE: To assess the effect of Bryan cervical disc replacement on the function of the cervical spine. METHODS: Bryan cervical artificial disc replacement was performed in 164 cases from Dec 2003 to Aug 2007, and all the cases were retrospectively followed up. Among them, 1 disc replacement was done in 132 cases, 2 discs in 28 cases and 3 discs in 4 cases with a total number of 200 artificial discs. There were 102 male patients and 62 female patients. Their age ranged from 25 to 70 years old (with an average of 47 years old). All the cases were operated according to the standard procedure for Bryan artificial disc replacement, and immobilized in a cervical collar for 2 weeks after operation. Motion of the replaced disc in sagittal direction, JOA score and satisfaction rate of the patients were followed up and evaluated. RESULTS: In this group, no acute complications happened during the operation. All patients returned to work 4 to 6 weeks after operation. The postoperative ameliorate rate of JOA score was 56%. Range of motion in sagittal direction of the operated disc was 14.4 degrees before operation, decreased to 5.7 degrees at 1 week after operation , but improved to 14.7 degrees at the time of final follow-up and was not significantly different from preoperative range. Motion in the upper adjacent disc to the replacement level was 10.9 degrees before operation, decreased to 5.5 degrees at 1 week after operation , and improved to 8.2 degrees at the time of final follow-up but was significantly smaller than preoperative range. The satisfaction rate of the patients was 94%. Loosening of the prosthesis happened in 1 case 6 months after operation but remained stable afterwards. Subsidence up to 1 mm occurred in another case 7 months after operation but also remained stable afterwards. Automatic posterior union occurred in 3 cases in which relative small size artificial discs were implanted. CONCLUSIONS: The clinical outcome of Bryan artificial disc replacement was quite good. Pre-operaive range of motion of the cervical spine can be maintained.