Biomechanical comparison of conventional versus modified technique in distal chevron osteotomies of the first metatarsal: A cadaver study
| Autor: | Lennard Loweg, Jan Bredow, Matthias Trost, Peer Eysel, Matthias Knieps, Sönke Percy Frey, Tobias L. Schulte, Wolfram F. Neiss |
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| Rok vydání: | 2018 |
| Předmět: |
Male
Chevron osteotomy 03 medical and health sciences 0302 clinical medicine Cadaver Chevron (anatomy) Medicine Humans Orthopedics and Sports Medicine Hallux Valgus Metatarsal Bones Aged Orthodontics Aged 80 and over 030222 orthopedics Universal testing machine Osteosynthesis biology business.industry First metatarsal Modified technique 030229 sport sciences biology.organism_classification Biomechanical Phenomena Osteotomy Valgus Female Stress Mechanical business |
| Zdroj: | Foot and ankle surgery : official journal of the European Society of Foot and Ankle Surgeons. 25(5) |
| ISSN: | 1460-9584 |
| Popis: | Background Distal chevron osteotomy can be performed using a conventional or a modified technique. The aim of this biomechanical study was to compare the stability of the two techniques. Methods Eighteen first metatarsals from nine pairs of fresh frozen human cadaver feet were used. A distal chevron osteotomy was performed using the conventional technique in group 1 (n = 9) and using the modified technique in group 2 (n = 9). The head of the first metatarsals was loaded in two different configurations (cantilever and physiological), using a materials testing machine. Results In the cantilever configuration, the relative stiffness of the osteosynthesis in comparison with intact bone was 60% (±21%) in group 1 and 65% (±25%) in group 2 (p = 0.61). In the physiological configuration, it was 47% (±29%) in group 1 and 47% (±21%) in group 2 (p = 0.98). The failure strength in the cantilever configuration was 235 N (±128 N) in group 1 and 210 N (±107 N) in group 2 (p = 0.47). Conclusions The conventional and the modified technique for distal chevron osteotomy in the treatment of hallux valgus show a comparable biomechanical loading capacity in this cadaver study. |
| Databáze: | OpenAIRE |
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