Prestige LP颈椎椎间盘置换术后“张口不良”原因分析

目的探讨Prestige LP颈椎椎间盘置换术术后＂张口不良＂原因。方法 2008年2月～2010年3月行PrestigeLP颈椎椎间盘置换术26例。通过对患者术前及术后颈椎正侧位、动力位X线片及三维CT影像学资料的搜集和对比,分析Prestige LP颈椎椎间盘置换术术后＂张口不良＂原因,并对患者颈椎功能障碍指数（neck disability index,NDI）及颈部、上肢疼痛视觉模拟量表（visual analogue scale,VAS）评分,以及依据动力位X线片测量手术节段单间隙矢状面屈伸运动度进行统计学分析。结果 8例患者发生置换椎间盘＂张口不良＂。正常患者与＂张口不良＂患者术后VAS评分及NDI的差异无统计学意义（P〉0.01）,但＂张口不良＂患者术后颈椎活动度小于正常组,差异有统计学意义（P〈0.01）。出现置换椎间盘＂张口不良＂患者中,1例术前存在颈椎结构性后凸,术后颈椎后凸无改善;5例置入椎间盘与上下相邻椎间隙不平行,提示椎间隙处理不准确;1例椎间隙处理中椎体后缘骨质切除过多导致置换椎间盘＂张口不良＂。结论 Prestige LP颈椎椎间盘置换手术操作较简单方便,但手术依赖术者主观性和经验性较多,手术本身客观性和精确性较少,易出现局限性后凸和椎间盘＂张口不良＂。术后椎间盘＂张口不良＂不影响患者症状改善,但影响术后颈椎活动度;要获得满意的间盘动-静态平衡,需要严格掌握适应证、遵循手术关键原则和一个较长的学习曲线。

Cause analysis for reverse gape after Prestige LP cervical disc replacement

Objective To analyze the reasons for reverse gape after Prestige LP artificial cervical disc replacement.Methods Twenty-six patients who received Prestige LP disc replacement from February 2008 to March 2010 were enrolled in this study.They were all followed up for at least 2 years.Their radiographs including X-ray films at anteroposterior and dynamic positions,and 3D CT were collected and compared.Neck disability index(NDI),visual analogue scale(VAS) score of neck pain and brachialgia,and cervical range of...