Varus deformity occurs in 32-45% of patients with gonarthrosis, causes pathological overload of the medial meniscus and initiates severe degenerative changes in the knee joint. In 2018, a minimally invasive technique for correcting varus deformity, fibula proximal osteotomy, was described for the first time. In the work, based on the constructed three-dimensional model of the lower limb, considering the ligamentous apparatus and trabecular elements of the femur and tibia apices, the effect of fibula proximal osteotomy on the stress-strain state of the knee joint meniscus was analyzed using the finite element method, depending on the varus deformity degree. The limits of this method applicability were established. Fibula proximal osteotomy significantly reduces the high-stress region area in the case of varus of 2 and 4 degrees, less noticeably in the case of normal geometry and does not change the size of the high-stress area at 6 degrees of varus. It has been shown that considering the action of the long peroneus muscle in the model further reduces stress on the medial meniscus and also leads to an increase in stress on the lateral meniscus.

Arseniy A. Rimsky, PhD student; e-mail: arsrim@mail.ru; https://orcid.org/0009-0008-6141-983X

Ekaterina Yu. Krylova, Candidate of Physical and Mathematical Sciences (PhD), Associate Professor; e-mail: kat.krylova@bk.ru;

https://orcid.org/0000-0002-7593-0320; AuthorID: 722982

Nikolay V. Ostrovsky, Doctor of Medical Sciences, Professor; e-mail: nvostrovsky@mail.ru; https://orcid.org/0000-0002-8370-2299; AuthorID: 116256

Andrey V. Garkavi, Doctor of Medical Sciences, Professor; e-mail: avgar22@yandex.ru; https://orcid.org/0000-0003-4996-1657