Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5032617 | Medical Engineering & Physics | 2017 | 6 Pages |
Abstract
Hallux valgus (HV) was one of the most frequent female foot deformities. The aim of this study was to evaluate mechanical responses and stabilities of the Kirschner, bandage and fiberglass fixations after the distal metatarsal osteotomy in HV treatment. Surface traction of different forefoot regions in bandage fixation and the biomechanical behavior of fiberglass bandage material were measured by a pressure sensor device and a mechanical testing, respectively. A three-dimensional foot finite element (FE) model was developed to simulate the three fixation methods (Kirschner, bandage and fiberglass fixations) in weight bearing. The model included 28 bones, sesamoids, ligaments, plantar fascia, cartilages and soft tissue. The peak Von Mises stress (MS) and compression stress (CS) of the distal fragment were predicted from the three fixation methods: Kirschner fixation (MSÂ =Â 6.71Â MPa, CSÂ =Â 1.232Â MPa); Bandage fixation (MSÂ =Â 14.90Â MPa, CSÂ =Â 9.642Â MPa); Fiberglass fixation (MSÂ =Â 15.83Â MPa, CSÂ =Â 19.70Â MPa). Compared with the Kirschner and bandage fixation, the fiberglass fixation reduced the relative movement of osteotomy fragments and obtained the maximum CS. We concluded that fiberglass fixation in HV treatment was helpful to the bone healing of distal fragment. The findings were expected to guide further therapeutic planning of HV patient.
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Physical Sciences and Engineering
Engineering
Biomedical Engineering
Authors
Mao Rui, Guo Junchao, Luo Chenyu, Fan Yubo, Wen Jianmin, Wang Lizhen,