Cannulated screws versus nitinol staple for tarsometatarsal fusion: A cadaveric biomechanical comparison model

IF 1.9 3区医学 Q2 ORTHOPEDICS Foot and Ankle Surgery Pub Date : 2024-12-01 DOI:10.1016/j.fas.2024.05.011

Temitope Adebayo, Zachary Koroneos, Erdi Özdemir, Alex Herrin, Sherif El Akkari, Gregory Lewis, Umur Aydogan

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Abstract

Background

The objective of this study was to evaluate the biomechanical stability of a medially placed nitinol staple compared to two crossed-screws in the first TMT-1 joint fusion in a cadaveric cyclic loading model.

Methods

Seven matched pairs (N = 7) of lower limb cadaveric specimens were utilized. TMT-1 joints from each donor were fixed with a medially placed nitinol staple or dorsally placed two 3.5 mm partially threaded cannulated crossed-screws. Specimens were tested in a 4-point bending setting with increasing cyclic forces.

Results

The mean plantar gapping was not significantly different between the two groups at any loading stage below 200 N. Specimens fixed with a nitinol staple failed at a mean load of 305 ± 57 N. Conversely, those fixed with crossed-screws failed at 373 ± 86 N. (P = .09).

Conclusion

There was no statistical difference between a medially placed nitinol staple and dorsally placed crossed-screws in failure loads and plantar gapping under cyclic loads at the TMT-1 joint, however, the staple fixation was much more variable.

Level of evidence

Level V, basic science study, biomechanics

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跖跗关节融合术中的套管螺钉与镍钛诺钉：尸体生物力学比较模型

本研究的目的是评估在尸体循环加载模型中首次TMT-1关节融合术中，与两个交叉螺钉相比，中间放置镍钛诺钉的生物力学稳定性。方法采用7对匹配的下肢尸体标本（N = 7）。每个供体的TMT-1关节用中间放置的镍钛诺钉或背侧放置的两个3.5 mm部分螺纹空心交叉螺钉固定。试件在4点弯曲设置中进行测试，并增加循环力。结果两组在200 n以下加载阶段的平均足底间隙无显著差异，镍钛诺钉固定在305±57 n时失败，而十字螺钉固定在373±86 n时失败（P = 0.09）。结论在TMT-1关节处，中侧放置镍钛诺钉与背侧放置十字螺钉在循环载荷下的破坏载荷和足底间隙无统计学差异，但钉固定的变化较大。证据等级：V级，基础科学研究，生物力学

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来源期刊

Foot and Ankle Surgery ORTHOPEDICS-

CiteScore

4.60

自引率

16.00%

发文量

202

期刊介绍： Foot and Ankle Surgery is essential reading for everyone interested in the foot and ankle and its disorders. The approach is broad and includes all aspects of the subject from basic science to clinical management. Problems of both children and adults are included, as is trauma and chronic disease. Foot and Ankle Surgery is the official journal of European Foot and Ankle Society. The aims of this journal are to promote the art and science of ankle and foot surgery, to publish peer-reviewed research articles, to provide regular reviews by acknowledged experts on common problems, and to provide a forum for discussion with letters to the Editors. Reviews of books are also published. Papers are invited for possible publication in Foot and Ankle Surgery on the understanding that the material has not been published elsewhere or accepted for publication in another journal and does not infringe prior copyright.