BIOCHEMICAL FINITE ELEMENT ANALYSIS OF THE LOCKED KIRSCHNER WIRE SYSTEM VERSUS VOLAR PLATE FIXATION OF DISTAL RADIUS FRACTURE

  • Woraphon Jaroenporn Department of Orthopaedics, Police General Hospital, Bangkok, Thailand
  • Wassapol Rerksanan Department of Orthopaedics, Police General Hospital, Bangkok, Thailand
  • Vajarin Phiphobmongkol Department of Orthopaedics, Police General Hospital, Bangkok, Thailand
  • Jaruwat Vechasilp Department of Orthopaedics, Police General Hospital, Bangkok, Thailand
  • Samran Phukang Department of Orthopaedics, Jurarat 3 International Hospital, Bangkok, Thailand
  • Wichit Siritattamrong Department of Orthopaedics, Jurarat 3 International Hospital, Bangkok, Thailand
  • Natcha Ariyaprakai Department of Orthopaedics, Jurarat 3 International Hospital, Bangkok, Thailand
Keywords: Finite element analysis, Distal radius fracture, Volar plate, K-wire, Locked K-wire, Biomechanical study

Abstract

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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Locked K-wire system consisting of seven pins
Published
2021-11-09
How to Cite
1.
Jaroenporn W, Rerksanan W, Phiphobmongkol V, Vechasilp J, Phukang S, Siritattamrong W, Ariyaprakai N. BIOCHEMICAL FINITE ELEMENT ANALYSIS OF THE LOCKED KIRSCHNER WIRE SYSTEM VERSUS VOLAR PLATE FIXATION OF DISTAL RADIUS FRACTURE. J Southeast Asian Med Res [Internet]. 2021Nov.9 [cited 2021Dec.9];5(2):91-8. Available from: https://www.jseamed.org/index.php/jseamed/article/view/97
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Original Articles