Lenke5型青少年特发性脊柱侧凸手术矫形的有限元研究

目的 通过建立有限元模型探讨Lenke 5型青少年特发性脊柱侧凸(adolescent idiopathic scoliosis,AIS)的最佳手术方案.方法 建立Lenke 5型AIS的有限元模型,模拟4种不同方案的90°去旋转和压缩序贯矫形,比较矫形效果及矫形后脊椎的应力水平.结果 4种方案有限元模型模拟矫形后的...

Finite element study of Lenke 5 adolescent idiopathic scoliosis surgical correction

Objective To seek the best surgical protocol of Lenke 5 adolescent idiopathic scoliosis（AIS） through finite element simulation.Methods Four surgical strategy with the model of AIS were designed and simulated.All the main steps including derotation and compression of each strategy were simulated.The stress variation of the spine and corrective effect were compared among the protocols of different surgical approach and fusion level.Results Coronary lumbar deformity was corrected to 22°,23°,26°and 26°for the 4 surgical protocols used in the simulation,respectively.Physiological sagittal plane configuration was maintained,but higher stress in the anterior short fusion.A similar apical rotational correction was recorded between anterior single-rod corrction（41.68°） and posterior whole segment pedicle screw fixation（37.79°）when fused to the inferior extremity vertebra.Conclusion The model simulate correction procedures including 90°derotation and compression successfully.For Lenke 5 AIS,when fuse to the inferior extremity vertebra,whole segment pedicle screw fixation can achieve satisfactory correction effect.