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目的:评价全脊椎切除术后应用三种不同重建方式对脊柱稳定性的影响。方法:选用6具新鲜尸体T9～L3脊柱标本,建立T12全脊椎切除模型,进行三种不同的前后方重建:(1)前方人工椎体+后方椎弓根螺钉固定;(2)前方人工椎体、钢板+后方椎弓根螺钉固定;(3)前方骨水泥-螺钉复合体+后方椎弓根螺钉固定。采用非损伤性加载对完整标本和三种重建方式下的每个脊柱标本的稳定性进行测试。结果:三种方法重建术后在4N载荷下T11~L1各运动方向的平均运动范围均较完整标本小(P<0.001),三种重建方式之间无统计学差异(P>0.05)。结论:全脊椎切除术后三种重建方式均可以重建脊柱的稳定性。
OBJECTIVE: To evaluate the effect of three different reconstruction modalities on spinal stability after total splenectomy. Methods: Six fresh corpses T9-L3 spine specimens were selected and T12 total spondylectomy model was established. Three different reconstruction methods were performed: (1) anterior artificial vertebral body and posterior pedicle screw fixation; (2) anterior artificial vertebra Body, plate + posterior pedicle screw fixation; (3) anterior bone cement - screw complex + posterior pedicle screw fixation. Non-invasive loading was used to test the integrity of the entire specimen and the stability of each spinal specimen under the three reconstruction modalities. Results: The mean range of motion of T11 ~ L1 under the 4N load was smaller than that of the intact specimen (P <0.001) under the 4N load. There was no significant difference among the three reconstruction methods (P> 0.05). Conclusion: Three kinds of reconstruction after total spondylectomy can reconstruct the stability of the spine.