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目的：比较腰椎后路融合术（PLIF）单、双枚椎间融合器（Cage）的使用对远期疗效的影响。方法：回顾我院2004-2011 年间164 例因腰椎退变疾病行单节段PLIF患者的临床资料，按Cage 数目将其分为单Cage 组（114 例）与双Cage 组（50 例）。获得其住院资料和术后2 年以上临床与影像学随访资料并比较分析。结果：平均随访时间47.5个月。两组间的年龄、性别、术前JOA 评分、术后随访时间的差别无显著性（P>0.05），但单Cage 组失血量更低（P<0.05），但随访时相对椎间隙高度低于双Cage 组（P<0.05）；而两组间JOA评分改善率、随访时JOA评分、优良率、手术耗时、住院天数、并发症发生率的差别无显著性（P>0.05）。结论：PLIF中单、双Cage 的使用均能获得满意的疗效与安全性，与双Cage 相比，单Cage 手术失血更少，但术后远期相对椎间隙高度更低，对于这类患者应加强随访并警惕断钉等并发症的发生。

英文摘要:

Objective:To compare the influence of single and double cages in single segment posterior lumbar interbody fusion (PLIF).Methods:164 patients with lumbar vertebra regeneration who underwent single segment PLIF in our hospital from 2004 to 2011 were selected and divided into the single cage group (n=114) and the double cages group (n=50). Then the hospitalization, the clinical effects and follow-up's data after the operation in two groups were observed and compared.Results:The average follow-up was 47.5 months. There was no statistically significant difference about the age, gender, preoperative JOA score and the average follow-up time in the two groups (P>0.05); The blood loss and the relative height of intervertebral space in single cage group were lower than those of the double cages group with statistically significant differences (P<0.05); There was no statistically significant difference about the improvement rate of JOA score, follow-up's JOA score, excellent and good rate, operation time, hospitalization and the incidence of complications in the two groups (P>0.05).Conclusion:Both single and double cages can achieve satisfactory efficacy and safety in PLIF, but the single cage operation with lower blood loss, relative height of intervertebral space after operation, which should be strengthened in the follow-up for the PLIF patients.

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