Effect of Minimally Invasive Transforaminal Lumbar Interbody Fusion on Adjacent Segment Intrusion and Postoperative Imaging Degeneration of Adjacent Segment Disorder
CHEN Zhi-hui, SUN Peng-cheng, WANG Guo-zhu, et al
The Second Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine,Xi'an Shaanxi 710000
Abstract:【Objective】To investigate the effects of in minimally invasive transforaminal lumbar interbody fusion (MIS-TLIIF) on the intrusion of adjacent segments and postoperative imaging degeneration of adjacent segments disorder (ASDed). 【Methods】A total of 185 patients with single-segment degenerative lumbar spine disease treated with MIS-TLIIF in our hospital were enrolled in the syudy.Three months after surgery,the incidence of intrusion of the adjacent joint facet joints was counted.Patients were divided into the intrusive group and the non-intrusive group according to whether the adjacent segmental facet joints were invaded.The related factors affecting the intrusion of adjacent segmental facet joints after MIS-TLIIF were analyzed.After 3 years of follow-up,the incidence of ASDed after the operation was compared between the intrusive group and the non-intrusive group. 【Results】Three months after surgery,64 cases of adjacent segmental facet joint intrusion occurred,the incidence was 34.59%,while 121 cases were not disturbed.In the intrusion group,body mass index (BMI) ≥30 kg/m2,apical vertebral segment of L5,preoperative facet joint angle ≥40°,facet joint axial diameter,coronal diameter and sagittal of the shape diameter were higher than those of the non-intrusive group (P<0.05).The preoperative screw inclination angle and the distance between nut and superior articular process in the intrusion group were lower than those in the non-intrusion group (P<0.05). Logistic multivariate regression analysis showed that the apical vertebral segment of L5,BMI≥30 kg/m2,and preoperative facet joint angle ≥40° were all influencing factors for the intrusion of the adjacent segmental facet joint after MIS-TLIIF (P<0.05).After 3 years of follow-up,2 cases in the intrusion group and 4 cases in the non-intrusion group were lost to folloe-up.The follow-up rate was 96.76%.The incidence of ASDed in the intrusion group (56.45%) was higher than that in the non-intrusion group (39.32%,P<0.05). 【Conclusion】The apical vertebral segment of L5,BMI≥30 kg/m2 and preoperative facet joint angle ≥40° are the influencing factors of the adjacent segmental facet joint invasion after MIS-TLIIF.And Patients with the adjacent segmental facet joint invasion after MIS-TLIIF have a higher risk of ASDed within 3 years after surgery.
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