Biomechanical analysis of different osteosynthesis configurations in the pin and plate fixation method for distal humerus fractures.

Autor: Hakiminejad A; Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran., Nourani A; Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran. nourani@sharif.edu., Ghias N; Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran., Mahmoudi A; Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran., Same K; School of Medicine, Tehran University of Medical Sciences, Tehran, Iran., Kamrani RS; Department of Orthopedic and Trauma Surgery, Tehran University of Medical Sciences, Tehran, Iran., Nabian MH; Center of Orthopedic Trans-Disciplinary Applied Research (COTAR), Tehran University of Medical Sciences, Tehran, Iran. mh-nabian@sina.tums.ac.ir.
Jazyk: angličtina
Zdroj: BMC musculoskeletal disorders [BMC Musculoskelet Disord] 2023 Jul 17; Vol. 24 (1), pp. 579. Date of Electronic Publication: 2023 Jul 17.
DOI: 10.1186/s12891-023-06709-y
Abstrakt: Distal humerus fractures commonly occur in adults with low bone mineral density causing major technical challenges for orthopedic surgeons. Persian fixation method was introduced as a novel technique to stabilize small fragments in comminuted distal humerus fractures using a set of K-wires and a reconstruction plate. The present study aims to measure this technique's stiffness and stability of this technique and analyze the effect of influential parameters with numerical simulation and biomechanical testing on a cadaveric specimen. Validation of the finite element (FE) model was conducted based on results of experiments. The results indicated that Delta configuration mainly led to a higher stiffness in the case of axial loading and anterior bending compared to L configuration. Analyzing the influential factors of this technique suggests that changes in diameter and number of K-wires have a similarly significant effect on the construct stiffness while the height of plate had a slight influence. Also, the diameter of wires was the most effective parameter for implant failure, particularly in the 3-pin construct, which caused a reduction in failure risk by about 60%. The results revealed that the Persian fixation method would achieve suitable stability compared to the dual-plating technique.
(© 2023. The Author(s).)
Databáze: MEDLINE
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