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目的 通过观察腰椎小关节角的改变,探讨腰椎小关节矢状化与退行性腰椎滑脱(degenerative lumbar spondylolisthesis,DLS)间的相关性.方法 研究纳入2013年1月-2016年2月收治并符合选择标准的DLS患者57例(DLS组),其中男26例,女31例;年龄34 ～ 84岁,平均54.0岁.以40例同期收治的非DLS患者作为对照组,男23例,女17例;年龄29～ 82岁,平均55.6岁.两组患者性别及年龄比较,差异均无统计学意义(P＞0.05).两组行腰椎MRI扫描,测量并比较腰椎小关节角差异;DLS组常规摄腰椎正侧位X线片,参照Meyerding分度标准对腰椎滑脱进行分度,比较不同分度患者间腰椎小关节角差异.结果 DLS组腰椎小关节角为(34.18±4.81)°,显著小于对照组的(45.87±1.09)°,比较差异有统计学意义(t=15.073,P=0.000).DLS组中Ⅰ度滑脱24例,Ⅱ度19例,Ⅲ度14例;其腰椎小关节角分别为(39.00±2.69)、(32.15±1.68)、(28.68±1.23)°;随滑脱程度增加,腰椎小关节角逐渐减小,比较差异有统计学意义(P＜0.05).结论 腰椎小关节矢状化可能是发生DLS的风险因素之一.“,”Objective To study the relationship between sagittal facet joint and degenerative lumber spondylolisthesis (DLS) by observing the changes of the lumbar facet joint angle.Methods Fifty-seven patients with DLS who met the inclusion criteria between January 2013 and February 2016 were collected (DLS group).There were 26 males and 31 females,with the mean age of 54.0 years (range,34-84 years).Forty patients without DLS at same stage were collected as control group.There were 23 males and 17 females with the mean age of 55.6 years (range,29-82 years).There was no significant difference in gender and age between 2 groups (P＞0.05).The lumbar facet joint angles were measured and compared by MRI scanning images in 2 groups.In DLS group,X-ray films were used to evaluated the degree of the lumbar spondylolisthesis on the basis of the Meyerding standard,and compared the facet joint angles between patients of different DLS degree.Results Facet joint angles in the DLS group [(34.18± 4.81)°] were significantly smaller than those in control group [(45.87±1.09)°] (t=15.073,P=0.000).In DLS group,the patients were rated as degree Ⅰ in 24 cases,degree Ⅱ in 19 cases,degree Ⅲ in 14 cases.As the degree of DLS increased,the lumbar joint angle decreased gradually,and showing significantly differences between patients of different DLS degree (P＜0.05).Conclusion Sagittal lumbar facet joint may be one of the main risk factors of DLS.