Biomechanical comparison of miniature steel plates and Kirschner wires fixation for metacarpal fractures&nbsp;

doi:10.13418/j.issn.1001-165x.2025.4.16

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Chinese Journal of Clinical Anatomy ›› 2025, Vol. 43 ›› Issue (4) : 460-465. DOI: 10.13418/j.issn.1001-165x.2025.4.16

Biomechanical comparison of miniature steel plates and Kirschner wires fixation for metacarpal fractures

Lin Zejin¹, Zhang Meichao²* , Deng Kai¹, Du Xuehua¹, Xie Xihong¹, Wu Haidong¹

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Abstract

Objective To conduct mechanical analysis on three different fixation methods for metacarpal fractures so as to provide experimental data for clinical application. Methods By applying different fixation methods for metacarpal fractures, conducting three-point bending tests and compression tests, the bending stiffness and compression stiffness were calculated respectively. The change of load-displacement loading was monitored. The stiffness of different fixation methods was compared. Results Compared with the standard cross Kirschner wire fixation method, the titanium locking plate (4/6 screws) posterior fixation showed a significant difference in the three-point bending test (palmar compression). There was no significant difference in the three-point bending test (lateral compression) and compression test. In the three-point bending test and compression test, there was no significant difference in the fixation effect between the titanium locking plate with 4 locking screws or 6 locking screws. Conclusions The main force causing the displacement of the metacarpal fracture comes from the flexion side, and the dorsal plate fixation is consistent with the biomechanics of the human body, which is the best choice for treating the metacarpal instability fracture.

Key words

Biomechanical analysis / / / Metacarpal fracture / / / Miniature locking steel plates / / / K-wire

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Lin Zejin, Zhang Meichao , Deng Kai, Du Xuehua, Xie Xihong, Wu Haidong. Biomechanical comparison of miniature steel plates and Kirschner wires fixation for metacarpal fractures [J]. Chinese Journal of Clinical Anatomy. 2025, 43(4): 460-465 https://doi.org/10.13418/j.issn.1001-165x.2025.4.16

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