Биомеханический анализ надежности фиксации проксимального отдела бедренной кости при фиброзной дисплазии в условиях остеосинтеза различными типами фиксаторов (экспериментальное исследование)

Fibrous dysplasia is a non-hereditary congenital disease of the skeleton, which is accompanied by the cysts formation filled with abnormal fibrous bone tissue. Surgical treatment using various types of the osteosynthesis aimed to reinforcing diseased dysplastic process of the femur is generally accepted and widely used by orthopedic surgeons. The choice of osteosynthesis for surgical treatment of fractures and deformations of proximal femoral bone in the patients with fibrous dysplasia remains currently important due to a large part of complications associated with migration of structure elements and unstable osteosynthesis. A synthetic femur Sawbones (USA) model was used for biomechanical research of proximal hollow defects, which formed the standard volume and localization (simulation model of focal forms of fibrous dysplasia). Femoral model with hollow defect has been fixed by the typical methods of osteosynthesis: locking compression plate (LCP); femoral interlocking nail (FIN); angled blade plate (ABP). The samples under compressive static load were tested in TIRAtest-2151 machine. We determined the boundaries of strength and deformation during the destruction of the sample. The destruction of all the samples occurred at loads considerably higher than those ones that occur in normal conditions, indicating the effectiveness of these techniques osteosynthesis. The results reflect the benefits of LCP and FIN, providing greater rigidity fixation of the proximal femur and have choices in patients with fibrous dysplasia.