颈椎单开门两种固定方法的固定效果之生物力学研究

目的 :分析颈椎单开门不同固定方法的固定效果。方法 :新鲜成人颈椎标本 6具 ,模拟单开门椎管扩大术式 ,依次分 2组 ,A组 :单开门后 ,椎板用 10号丝线固定在对侧椎旁肌肌膜和关节囊 ;B组 :单开门后 ,椎板用 10号丝线斜拉分别固定在C2 和C7棘突。应用生物力学方法 ,测试颈椎单开门后再关门负荷及功耗。结果 :再关门过程中A组和B组的最大负荷分别为 ( 8.5 7± 1.80 )N、( 12 .93± 2 .2 3)N ;完全关门时负荷分别为 ( 8.12± 2 .17)N、( 12 .93± 2 .2 3)N ;功耗分别为 ( 0 .0 6 2± 0 .0 2 1)J、( 0 .0 83± 0 .0 2 3)J。相互间差异显著 (P <0 .0 5或P <0 .0 1)。结论 :斜拉棘突固定法固定效果较好

Biomechanical Study of Two Different Fixation Techniques of Expansive Open-door Laminoplasty of Cervical Spine

Objective: To compare the biomechanical character of two different fixation techniques of expansive open-door laminoplasty of cervical spine.Methods:Six fresh cadaveric spine specimens were harvested to be operated upon with two different fixation techniques of expansive open-door laminoplasty of cervical spine.Open vertebral arcus lamina were fixed at the vertebral side muscle membrane and the articularis capsula on other side in group A and at the spinosus processus of C 2 and C 7 with obliquely pulled silk in group B.The load of reclosed open-door thoroughly,maximum load and maximum energe were collected and calculated.Results:The load of reclosed open-door thoroughly,maximum load and maximum energe were significantly higher in group B than those of group A ( P <0.05 or <0.01).Conclusion:Fixation at the spinosus processus with obliquely pulled silk can provide more efficient and effective fixation.