Giordano Anthony R, Fallat Lawrence M
Department of Podiatric Surgery, Oakwood Healthcare System, Dearborn, MI, USA.
J Foot Ankle Surg. 2004 Jul-Aug;43(4):225-30. doi: 10.1053/j.jfas.2004.05.005.
The objective of this study was to gather pilot data of the pullout strength of intraosseous wire for fixation of fifth metatarsal avulsion fractures and to compare intraosseous wire fixation with tension-band wiring. Osteotomies consistent with fifth metatarsal avulsion fractures were created in 5 matched pairs of cadaver limbs. One limb of each pair underwent fixation with intraosseous wiring and the other with tension band wiring. Metatarsals were then loaded to failure, defined as the maximum force achieved before the slope of the load curve moved from a positive to a negative value. Tension-band wiring showed a mean strength of 164.5 +/- 103.7 N compared with a mean strength of 113.7 +/- 46.6 N for intraosseous wiring. No significant difference in strength was shown between methods of fixation. Although the power of this data is small (.143), the data indicate that intraosseous wiring shows similar pullout strength when compared with tension-band wiring for fixation of fifth metatarsal avulsion fractures.
本研究的目的是收集用于固定第五跖骨撕脱骨折的骨内钢丝拔出强度的初步数据，并将骨内钢丝固定与张力带钢丝固定进行比较。在5对匹配的尸体肢体上制造与第五跖骨撕脱骨折一致的截骨术。每对中的一个肢体采用骨内钢丝固定，另一个采用张力带钢丝固定。然后将跖骨加载至失效，失效定义为载荷曲线斜率从正值变为负值之前达到的最大力。张力带钢丝固定的平均强度为164.5 +/- 103.7 N，而骨内钢丝固定的平均强度为113.7 +/- 46.6 N。两种固定方法之间未显示出强度上的显著差异。尽管该数据的效力较小（0.143），但数据表明，在固定第五跖骨撕脱骨折时，骨内钢丝固定与张力带钢丝固定的拔出强度相似。
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