经单或双侧椎弓根灌注自固化磷酸钙骨水泥椎体成形的效果比较

Biomechanical efficacy of unipedicular versus bipedicular vertebroplasty assisted with autosetting calcium phosphate cement

中文关键词:  椎体成形术 磷酸钙 骨水泥 生物力学 脊柱骨折

英文关键词:Vertebroplasty  Calcium phosphate cement  Biomechanics  Spine fractures

中文摘要:

  目的：比较经单或双侧椎弓根将白同化磷酸钙骨水泥（autosetting calcium phosphate cement，ACPC）灌注入骨质疏松性压缩骨折椎体的成形效果。方法：自7具老年新鲜尸体脊柱上取T10～T12或L1～L3连续三节段椎体共10个标本，分别测定初始中间椎体和相邻椎间盘非破坏性载荷下标本前屈、后伸、侧屈和扭转运动时的应力、应变值和轴向刚度。然后在前屈压缩下造成中间椎体骨折。标本随机分成两组，分别经单侧和双侧椎弓根将3ml ACPC注入椎体后再同前测试，并测定中间椎体极限抗压强度和刚度。结果：成形术后中间椎体在非破坏性载荷下标本前屈、后伸和侧屈运动时应力和轴向刚度较初始无明显增加，经单侧和双侧椎弓根灌注组之间也无明显差异，但扭转刚度皆有下降。两组抗压极限强度较初始都有显著性提高。两组相领椎间盘应力和轴向刚度皆无明显变化。结论：经单侧和双侧椎弓根灌注3ml ACPC都能较好恢复骨质疏松性压缩骨折椎体的生物力学性能，对相邻椎间盘的抗压力学性能影响小。

英文摘要:

  Objective:To compare the effect between unipedicular and bipedicular vertebroplasty assisted withautosetting calcium phosphate cement(ACPC).Method:Ten specimens consisting of three continuous thora-columbar vertebrae were obtained from 7 fresh cadavers.In