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Vol. 19, Art. 74 (pp. 1038-1052)    |    2018       

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Estimation of distribution of stresses of structure of bionic endoprosthesis of brush joint

Nikolaenko A.N.

State Budget-funded Educational Institution of Higher Professional Education Samara State Medical University

Brief summary

The biomechanical behavior of endoprosthesis replacement systems with implant fixation plays an important role in its functional durability inside the bone. The finite element method showed that the concentration of stresses occurring exclusively in the cortical bone near the neck of the implants is responsible for initiating bone resorption in this area. The purpose of the study is to assess the stress distribution in the design of the bionic endoprosthesis of the hand joint by the finite element method. The results showed that cases without power load are not dangerous for the prosthesis. In the case of ball gripping with a brush with a finger load of 25.16 ? 3.3 N, sufficient safety factors were obtained both for bone tissue (at least 4) and for the material of the prosthesis (at least 4.65). The fatigue safety factor has a minimum value of 1.36 for the second case of loading on the prosthesis of the first part of the model. This shows that in case of constant loading in this mode, fatigue defects may appear and physical activity with high loads on the prosthesis should be limited.


Key words

bionic endoprosthesis, hand joints, biomechanics, finite element method

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