Biomechanical rationale for choosing a means of fixation of bone fragments during proximal osteotomy of the first metatarsal bone

One of the most common pathologies that occurs in static deformities anterior joint foot is valgus deformity first toe. Distal or diaphyseal osteotomies are used for mild degrees, and proximal severe ones. Spikes, screws plates with angular stability often to fix bone fragments. Purpose - help biomechanical studies, study stress-deformed state model different options osteosynthesis metatarsal after osteotomy. Materials methods. Mathematical modeling during correction toe using osteotomy was carried out. Three variants were modeled: Kirschner pins, screws, a plate. Results. During spikes, maximum stresses 2.1 MPa occur distal fragment. In fragment, twice as low 1.2 MPa. The tension resection zone 0.1 fragments almost same, 0.9 0.8 MPa, respectively. Osteosynthesis plate provides level well an even distribution between 0.7 spikes relative deformation regenerate does not exceed 0.13%. plate, this figure reaches 0.5%. Conclusions. For order eliminate toe, can be used. All investigated types provide stress bone, but, according criterion values showed worst result, best. research out accordance principles Helsinki Declaration. protocol approved by Local Ethics Committee participating institution. informed consent patient obtained conducting studies. No conflict interests declared authors.