Finite elemental analysis of local osteoporosis formation in the surgical treatment of fubilar fractures

Background.  When providing surgical medical care to patients with fibular fractures, one of the most common types of treatment is fixing the fracture area with a metal plate with screws during metallosteosynthesis surgery. During treatment, bone tissue is often thinned in the area of the fracture, which significantly increases the duration of treatment.  Aim.  Establishment of the mechanism of formation of osteoporosis in the fracture area after the operation of osteosynthesis of the fibula.  Material and methods.  The finite element method is used to simulate the destruction process using ANSYS.  Results.  A comparative study of the location of formation of focal osteoporosis formed in the fracture area of the distal part of the fibula diaphysis, under a metal plate installed during osteosynthesis, and the area of formation of maximum equivalent loads in the experimental mathematical model of the stress-strain state revealed complete similarity of the location.  Conclusions.  The formation of a zone of local osteoporosis in the area of a fibular fracture after osteosynthesis surgery is explained by a combination of factors, which are the presence of a fibular fracture fixed with metal screws with a metal plate, the support of the foot on the foot with pressure on the fibula. The zone of local osteoporosis in the area of the fibula fracture after osteosynthesis surgery occurs from the compression of compact plates of the fracture edges with limited mobility under the metal fixing plate.