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目的:比较经皮球囊扩张后凸成形术(percutaneous balloon kyphoplasty,BKP)与JACK椎体扩张器后凸成形术(JACK vertebral dilator kyphoplasty,DKP)对骨质疏松性椎体压缩骨折(osteoporotic vertebral compression fractures,OVCFs)生物力学的影响。方法:T11-L2老年骨质疏松椎体标本24个,分为BKP组(12椎)和DKP组(12椎)。DSFW-50型万能试验机将椎体前屈压缩25%制成OVCF