Mathematical Modelling with Definition of Stress Strain State in TibioFemoral Zone under Articular Cartilage Defect

I.A. Lazarev, O.A. Kostogryz, M.V. Skyban

Abstract


There is necessity of restoration of the anatomic structure and function of the knee joint, caused by the cartilage injury. On the basis of the mathematical finite elements modeling, we estimated stress strain state of the elements of biochemical model of knee joint — medial epicondyle of femur and articular cartilage with defect’s size of 5, 10, 15 and 20 mm. With the cartilage defect advents the tension is increasing sharply on it because of marginal effect. So, the edge of defect is the tensions concentrator and with growth of the defect’s size tensions increasing. Already at 5 mm defect’s size tensions increasing by 66.0 %, and at 20 mm — by 181.14 % (3-fold). In the dynamic loading conditions (in everyday life walking) such tensions can accelerate fast progressing of degenerative changes in structures of the knee joint.


Keywords


knee joint; tibiofemoral area; articular cartilage defect; finite elements modeling; tensions and deformations

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DOI: https://doi.org/10.22141/1608-1706.4.14.2013.88221

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