Objective:To introduce a key-vertebral-screws technique(KVST) in the surgical treatment of scoliosis extending to main thoracic levels, and to find the role of fulcrum bending in predicting the result of surgical trea...Objective:To introduce a key-vertebral-screws technique(KVST) in the surgical treatment of scoliosis extending to main thoracic levels, and to find the role of fulcrum bending in predicting the result of surgical treatment for scoliosis by this technique. Methods: Seventeen consecutive patients with scoliosis extending to main thoracic spine,who underwent pure posterior fusion without anterior or posterior release by KVST between January 2004 and July 2005 were evaluated for fulcrum bending flexibility, surgical correction rate, fulcrum bending correction index (FBCI) in main thoracic curves. Universal Spine System (USS) instrumentation was used in 15 cases,Monarch in another 2 cases. The severity of the curves was measured by Cobb's method using Rad Work 6. 0 software. Preoperative standing AP radiographs, preoperative fulcrum bending anterioposterior (AP) radiographs, postoperative standing AP radiographs, and most recent follow-up standing AP radiographs for spine were measured and recorded. All the data were analyzed with two-sample paired t-test by Origin 7. 0 software. Results: Infection and neurological complications were not noted. No major complications were found. Just one case had some axial back pain, which got a full recovery from physiotherapy for 2 weeks. In the X-ray, there was an average correction of 71. 5% of the fused main thoracic curves, which had no significant lose of correction in final follow-up. For the whole fused main thoracic curves, the fulcrum bending flexibility were lower to operation correction rate (P = 0. 013). The average FBCI was 123%. From the data, the more rigid curves (especially fulcrum bending flexibility <50%), the more correction rate operation could get, compared with fulcrum bending flexibility. Conclusion: (1) KVST is a good method in the surgical treatment of thoracic scoliosis, which can get satisfying result with lower medical cost. (2) Fulcrum bending flexibility is lower than operative correction rate by KVST in main thoracic curves (P<0. 05). In the more rigid curves assessed by fulcrum-bending radiograph, the operative corrective could be gained, especially in the curves which FBCI is lower than 50%.展开更多
文摘[目的]评估Lenke I型青少年特发性脊柱侧凸（adolescent idiopathic scoliosis,AIS）采用后路凸侧旋棒矫形与凹侧旋棒矫形至少2年的随访效果。[方法]收集本中心2008年7月～2011年7月间收治的Lenke I型AIS患者66例,平均年龄14.9岁,术前主弯均〈70°。按术中矫形技术分为凸侧旋棒组（32例）和凹侧旋棒组（34例）,所有患者均具有完整术前、术后及术后2年的全脊柱正侧位X线片以及术前、术后CT平扫。研究分析两组病例的主弯Cobb角及其矫正率、T_（5～12）后凸角、顶椎偏移距离（apical vertebral translation,AVT）、C_7偏离骶骨中央垂线距离（coronal C_7 to centre sacral vertical line,C_7-CSVL）和C_7偏离骶骨后上角距离（the sagital C_7 to centre sacral vertical line,C_7-SSVL）,置钉密度及置钉破壁率,并进行统计学比较。[结果]两组患者皆成功获得手术矫正,术中及术后2年随访无严重并发症发生;凸侧旋棒组和凹侧旋棒组的术前主弯Cobb角分别从平均（53.2±10.7）°和（51.2±10.8）°（P=0.455）矫正至术后平均（8.0±7.3）°和（12.9±7.0）°（P=0.008）,平均矫正率为（86.2±12.7）%和（75.3±13.0）%（P=0.001）;T_（5～12）后凸分别从术前平均（18.4±12.6）°和（23.2±19.3）°（P=0.248）,矫正至术后平均（20.2±10.9）°和（21.8±8.9）°（P=0.533）;术后冠状面和矢状面皆获得良好平衡。所有病例的凸侧和凹侧总椎弓根螺钉破壁率分别为1.2%和3.9%（P=0.162）;凸侧旋棒组和凹侧旋棒组的总椎弓根钉破壁率分别为1.3%和3.2%（P=0.01）。[结论]青少年脊柱侧凸采用凸侧旋棒技术矫正是一种安全有效的方法,较凹侧旋棒矫形具有更好的侧凸矫形效果和置钉安全性;结合胸椎小关节松解、体内折弯和增加凹侧预弯棒角度有助于矢状面后凸的维持或矫正,且至少2年随访的矫形效果维持良好。
文摘Objective:To introduce a key-vertebral-screws technique(KVST) in the surgical treatment of scoliosis extending to main thoracic levels, and to find the role of fulcrum bending in predicting the result of surgical treatment for scoliosis by this technique. Methods: Seventeen consecutive patients with scoliosis extending to main thoracic spine,who underwent pure posterior fusion without anterior or posterior release by KVST between January 2004 and July 2005 were evaluated for fulcrum bending flexibility, surgical correction rate, fulcrum bending correction index (FBCI) in main thoracic curves. Universal Spine System (USS) instrumentation was used in 15 cases,Monarch in another 2 cases. The severity of the curves was measured by Cobb's method using Rad Work 6. 0 software. Preoperative standing AP radiographs, preoperative fulcrum bending anterioposterior (AP) radiographs, postoperative standing AP radiographs, and most recent follow-up standing AP radiographs for spine were measured and recorded. All the data were analyzed with two-sample paired t-test by Origin 7. 0 software. Results: Infection and neurological complications were not noted. No major complications were found. Just one case had some axial back pain, which got a full recovery from physiotherapy for 2 weeks. In the X-ray, there was an average correction of 71. 5% of the fused main thoracic curves, which had no significant lose of correction in final follow-up. For the whole fused main thoracic curves, the fulcrum bending flexibility were lower to operation correction rate (P = 0. 013). The average FBCI was 123%. From the data, the more rigid curves (especially fulcrum bending flexibility <50%), the more correction rate operation could get, compared with fulcrum bending flexibility. Conclusion: (1) KVST is a good method in the surgical treatment of thoracic scoliosis, which can get satisfying result with lower medical cost. (2) Fulcrum bending flexibility is lower than operative correction rate by KVST in main thoracic curves (P<0. 05). In the more rigid curves assessed by fulcrum-bending radiograph, the operative corrective could be gained, especially in the curves which FBCI is lower than 50%.
