BIOCHEMICAL FINITE ELEMENT ANALYSIS OF THE LOCKED KIRSCHNER WIRE SYSTEM VERSUS VOLAR PLATE FIXATION OF DISTAL RADIUS FRACTURE
DOI:
https://doi.org/10.55374/jseamed.v5i2.97Keywords:
Finite element analysis, Distal radius fracture, Volar plate, K-wire, Locked K-wire, Biomechanical studyAbstract
Background: Volar locking plate (VP) and Kirschner wire (K-wire) fixations of distal end radius fractures are the most frequently used techniques that produce similar long term clinical results. However, inadequate fixation strength of the K-wire may cause pin loosening or migration. Although these complications can be prevented by immobilization, joint stiffness and a prolonged recovery period can occur.
Objective: Herein, a technique that provided more stability, allowing immediate motion after fixation by linking the K-wires into a single system (locked K-wire system) was proposed.
Methods: We evaluated biomechanical responses of the locked K-wire system and a VP in extraarticular distal radius fracture models AO/OTAa type 23A2 and 23A3 using three-dimensional finite element analysis. All models were tested under axial, bending, and torsional loads.
Results: From the simulation results, the total displacement was greater in the dorsal wedge fracture than that from the simple fracture under all loads for both fixation systems. The locked K-wire system and the VP could withstand immediate physiologic load with maximum displacements of 1.15 mm and 1.39 mm, respectively.
Conclusion: Considering the immediate physiologic load resistance and the ability to preserve its position during the bone-healing period, the locked K-wire system might be used as an alternative to fix distal radius fractures.
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References
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