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Selective versus nonselective fusion for idiopathic scoliosis: does lumbosacral takeoff angle change?

机译:特发性脊柱侧凸的选择性与非选择性融合:腰ac起飞角是否改变?

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摘要

STUDY DESIGN: Retrospective review of a prospective, multicentered database. OBJECTIVE: To determine the relationship between preoperative lumbosacral takeoff angle (LSTOA) and postoperative thoracolumbar/lumbar Cobb angle (TL/L Cobb angle) in patients undergoing selective thoracic fusions SUMMARY OF BACKGROUND DATA: Selective fusion of the thoracic curve can improve the lumbar curve inpatients with idiopathic thoracic scoliosis and a compensatory lumbar curve. Predicting improvement is controversial and determining whether to perform a selective fusion or nonselective fusion can be difficult. METHODS: Patients had undergone either nonselective or selective spinal fusion for adolescent or juvenile idiopathic scoliosis (Lenke 1B/3B/1C/3C). Outcome measures were: coronal and sagittal thoracic Cobb angle, TL/L Cobb angles, lumbar apical vertebral translation, LSTOA and coronal decompensation. Analyses compared relationships between preoperative and postoperative radiographic measures. RESULTS: Positive, significant correlations were found between preoperative LSTOA and preoperative TL/L Cobb angle in the nonselective (r=0.7; P<0.001) and selective (r=0.5; P<0.001) fusion groups. Mean two-year postoperative coronal TL/L Cobb angles were significantly improved in nonselective and selective fusion groups (32 degrees and 20 degrees , respectively, P<0.001). In the nonselective fusion group, LSTOA significantly decreased by 11 degrees (P<0.001), and in the selective group, the LSTOA had a modest but significant decrease of 2 degrees (P<0.001). The nonselective fusion also resulted in more lordosis between T10 and L2 (7.5 degrees of lordosis) than the selective approach (2.7 degrees kyphosis, P<0.001). For both groups, upper thoracic kyphosis increased after surgery (P<0.001, P<0.001). For nonselective fusions, regression modeling predicted TL/L Cobb angle at two-year follow-up based on preoperative TL/L Cobb angle and preoperative LSTOA (r=0.4, P<0.001). CONCLUSION: Collectively, these data demonstrate the preoperative TL/L Cobb angle and LSTOA can be useful predictors of postoperative TL/L Cobb angle after a selective instrumented fusion. Analyses of distal fixation levels demonstrated that to appreciably change the LSTOA using a posterior instrumented fusion, the distal level of fixation must be beyond the lumbar apex.
机译:研究设计:回顾性研究前瞻性,多中心的数据库。目的:确定接受选择性胸腔融合术的患者的腰pre骨起飞角(LSTOA)与术后胸腰段/腰椎Cobb角(TL / L Cobb角)之间的关系。背景数据摘要:胸廓曲线的选择性融合可改善腰椎弯曲度特发性胸椎侧弯和代偿性腰椎弯曲的住院患者。预测改进存在争议,确定执行选择性融合还是非选择性融合可能很困难。方法:对青少年或青少年特发性脊柱侧凸患者(Lenke 1B / 3B / 1C / 3C)进行了非选择性或选择性脊柱融合术。结果指标为:冠状和矢状胸Cobb角,TL / L Cobb角,腰椎顶椎体平移,LSTOA和冠状失代偿。分析比较术前和术后影像学检查之间的关系。结果:在非选择性(r = 0.7; P <0.001)和选择性(r = 0.5; P <0.001)融合组中,术前LSTOA与术前TL / L Cobb角之间存在显着正相关。在非选择性和选择性融合组中,术后两年平均冠状TL / L Cobb角明显改善(分别为32度和20度,P <0.001)。在非选择性融合组中,LSTOA显着降低了11度(P <0.001),而在选择性组中,LSTOA则有适度但显着的下降了2度(P <0.001)。非选择性融合还导致T10和L2之间的脊柱前凸(7.5脊柱前凸)比选择性方法(2.7驼背,P <0.001)更多。两组的上胸椎后凸畸形均在手术后增加(P <0.001,P <0.001)。对于非选择性融合,回归模型基于术前TL / L Cobb角和术前LSTOA预测两年随访时的TL / L Cobb角(r = 0.4,P <0.001)。结论:这些数据表明,术前TL / L Cobb角和LSTOA可作为选择性器械融合后术后TL / L Cobb角的有用预测指标。远端固定水平的分析表明,要使用后路器械融合明显改变LSTOA,远端固定水平必须超出腰椎尖。

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