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

👥 Alireza Hakiminejad, Amir Nourani, Narges Ghias, Alireza Mahmoudi, Kaveh Same, Reza Shahriar Kamrani, and Mohammad Hossein Nabian*

📔 BMC Musculoskeletal Disorders (Q2)

🗓 July 2023 / Volume 24

🗂 Original Research

📄 Abstract: 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.

🔗 https://doi.org/10.1186/s12891-023-06709-y

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