应用KASS系统前路矫正治疗特发性脊柱侧凸

目的]探讨应用KASS系统前路矫正治疗特发性脊柱侧凸的临床效果。方法]应用KASS系统治疗总123例病例。根据King分型法可分为：胸椎侧凸47例（其中Ⅱ型13例，Ⅲ型18例，Ⅳ型16例），胸腰椎或腰椎侧凸76例。所有病例中均对主要侧凸部位行前路矫形手术，平均随访7年7个月（2年～13年6个月）。结果]所有病例均获骨性融合，胸椎生理性后凸和腰椎生理性前凸基本正常。胸椎侧凸部位矫正率为68％，胸腰椎或腰椎侧凸矫正率为81％。胸椎最底椎水平倾斜改善率分别为78％和83％，顶椎旋转矫正率分别为59％和70％。无神经血管及内置物引发的并发症。结论]KASS系统可提供强有力的三维矫正效果，且融合节段少。

Anterior correction of idiopathic scoliosis using the KASS-Dual rod system

Objective] To analyze the clinical results of scoliosis patients treated by anterior correction surgery using the KASS (Kaneda Anterior Scoliosis System: the dual rod system). Method] Total 123 idiopathic scoliosis patients were treated. The patients' curve patterns by King classification were as follows:Thoracic scoliosis type Ⅱ (n = 13), Ⅲ (n = 18 ) , and Ⅳ (n = 16) ,total (n =47) and thoracolumbar or lumbar (TL/L) curve (n = 76)]. In all patients, anterior correction surgery within the range of the major curve was performed. The average follow-up period was 7 years 7 months (2 ～ 13 years 6 months). Result] Fusion was attained in all patients. Correction rates of the major curve scoliosis were 68% in thoracic scoliosis and 81%in TL/L scoliosis. In sagittal alignment, all patients restored nearly physiologic thoracic kyphosis and lumbar lordosis. Correction rates of horizontal tilt of the lowermost end vertebra were 78% in thoracic scoliosis and 83% in TL/L scoliosis. Correction rates of the apical vertebral rotation were 59% in thoracic scoliosis and 70% in TL/L scoliosis. No neurovascular and implant related complications were observed. Conclusion ] KASS allows excellent 3-D correction of the scoliosis and rigid enough stability to maintain the correction with a shorter fusion.