Authors
Khominets V.V.1, Brizhan L.K.2, Davudov D.V.2, Khominets I.V.2, Dol A.3
1 S.M. Kirov Military Medical Academy, Saint Petersburg
2 Main Clinical Hospital named after N.N. Burdenko Centre of Traumatology and Orthopedics, Moscow
3 Saratov State University, Saratov
Abstract
Osteosynthesis of the long bones of the limbs by plates is widely used in modern traumatology. However, the design of implants, options for their installation, the working length of the plate and the number of blocked screws, the angles of their holding, directly affecting the stability of osteosynthesis, remain the subject for further scientific discussions. The aim of the study was to develop a biomechanical model of the original double — row locking compression plate and its biomechanical substantiation of the possibility of using in the treatment of patients with diaphysis fractures. The material for this study was the original double-row locking compression plate from a titanium and the possibility of the introduction of polyaxial screws (Patent RU 2476180). The biomechanical model of the implant is developed on the basis of the finite element method. The straining and deformation that arises by the typical strains, that a healthy man can usually undergo, were explored in the research process. The calculation of the resource by the number of loading cycles, and calculated the stresses and strains that occur with various installation options of the plates plate. As a result, displacement and stress fields in bones and plates were obtained. Statistical calculation of the stress-strain junction of bone and plate was carried out for 3 types of loading: static support on one leg, walking, body rotations. The analyzed results of the biomechanical study indicate that the implant used for osteosynthesis of diaphysis fractures of type A3 is able to withstand static and dynamic typical cyclic loads while maintaining a stable fixation. It is established that the plate shall be located directly on the surface of the bone. Also, analyzing the results of the fatigue strength assessment of the material, it was found that the structure of the metal does not experience fatigue disorders under typical cyclic loads.
Keywords: biomechanics, bone, plate, fracture, diaphysis, osteosynthesis, tension, deformation.
References
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