Influence of bone tissue regenerate on rigidity of fractures fixation
DOI:
https://doi.org/10.32347/2410-2547.2021.107.89-102Keywords:
bone regenerate, rigidityof systems, osteosynthesis, biomechanical characteristics, tibia, compression, bending, torsion, permissible loadAbstract
Based on experimental studies, an analytical method is proposed for an estimation of the influence of a regenerate of a bone fabric on rigidity of the system of osteosynthesis.
A method for the experimental determination of displacements in the fracture region under the action of loads taking into account the regenerate has been developed and tested.
A number of experiments were performed in compression, bending and torsion to determine the deformation characteristics of systems without regenerate and in its presence.
The results of experiments related to the influence of bone regenerate formed during the fusion of fractures on the mechanical characteristics of the system "bone with a fracture - a means of fixation" are described. To assess the impact of bone regeneration, a method for studying the deformation of osteosynthesis systems using the method of modeling bone regeneration with a polymeric material with specified properties was developed and implemented.
Using the stiffness condition, the expression for the calculation of permissible loads that do not lead to dangerous displacements of fracture points is obtained. The reduced deformations and permissible loads for the systems "bone with a fracture - a means of fixation" at different stages of bone tissue (ВT) regeneration under the action of compression, bending and torsion are calculated. It is established that the formed regenerate significantly increases the rigidity of the system "bone with a fracture - bone regenerate - a means of fixation", which increases the level of allowable loads on the extremities at different stages of treatment.
Test and calculation data can be used to improve methods of treatment of damaged limbs in the intermediate and final stages of fracture fusion.
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