Biomechanical comparison of bone staple techniques for stabilizing tibial tuberosity fractures

Kyu-Tae Park, Min-Yeong Lee, Hwi-Yool Kim
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Abstract

This study compared the biomechanical properties of bone-stapling techniques with those of other fixation methods used for stabilizing tibial tuberosity fractures using 3-dimensionally (3D)-printed canine bone models. Twenty-eight 3D-printed bone models made from computed tomography scan files were used. Tibial tuberosity fractures were simulated using osteotomy. All samples were divided into 4 groups. Group 1 was stabilized with a pin and tension-band wire; group 2, with a pin and an 8 mm-wide bone staple; group 3, with 2 horizontally aligned pins and an 8 mm-wide bone staple; and group 4 with a 10 mm-wide bone staple. Tensile force was applied with vertical distraction until failure occurred. The load and displacement were recorded during the tests. The groups were compared based on the load required to cause displacements of 1, 2, and 3 mm. The maximum failure loads and modes were recorded. The loads at all displacements in group 4 were greater than those in groups 1, 2, and 3. The loads at 1, 2, and 3 mm displacements were similar in groups 1 and 3. There was no significant difference between groups 1 and 3. Groups 1 and 4 provided greater maximum failure loads than groups 2 and 3. Failure occurred because of tearing of the nylon rope, tibial fracture, wire breakage, pin bending, and fracture around the bone staple insertion. In conclusion, these results demonstrate that the bone-stapling technique is an acceptable alternative to tension-band wire fixation for the stabilization of tibial tuberosity fractures in canine bone models.
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钉骨技术稳定胫骨粗隆骨折的生物力学比较
本研究利用三维打印的犬骨模型,比较了骨钉技术与其他固定方法稳定胫骨粗隆骨折的生物力学特性。使用了28个由计算机断层扫描文件制成的3d打印骨骼模型。采用截骨术模拟胫骨粗隆骨折。所有样本分为4组。第一组用针和张力带丝固定;第二组,用大头针和8mm宽的骨钉;第三组,2个水平对齐的针和一个8mm宽的骨钉;第四组用10毫米宽的骨钉。拉力在垂直牵引下施加,直至失效。在试验过程中记录了载荷和位移。根据引起1、2和3毫米位移所需的载荷对各组进行比较。记录最大失效载荷和失效模式。第4组各位移荷载均大于第1、2、3组。1、2和3mm位移的载荷在1组和3组相似。第1组与第3组间无显著差异。组1和组4的最大失效载荷大于组2和组3。失败的原因包括尼龙绳撕裂、胫骨骨折、金属丝断裂、针弯曲、钉钉插入周围骨折。总之,这些结果表明,骨钉技术是一种可接受的替代张力带钢丝固定胫骨粗隆骨折的犬骨模型。
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来源期刊
Korean Journal of Veterinary Research
Korean Journal of Veterinary Research Veterinary-Veterinary (all)
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