Mathematical modeling of the stress-strain state of the knee joint model with aplasia of the cruciate ligaments and after restoration of the ligamentous apparatus

Defects in the establishment and development of cruciate ligaments are one main causes instability knee joint congenital longitudinal defects lower limbs. This pathology occurs with a frequency 0.017 per 1000 newborns. The absence leads to change shape articular surfaces joint, is formed due hypoplasia femoral condyles, intercondylar fossa femur, elevation tibia. Purpose - study stressed-deformed state aplasia before after reconstructive interventions compare obtained results norm. Materials methods. A basic finite-element model limb was developed, which supplemented collateral joint. On basis model, reflecting surgery using SUPER KNEE method according D. Paley were developed. tested under influence vertical load position bending at an angle 135. Results. mathematical modeling showed that increase stress level, both bone elements ligamentous apparatus. Restoration apparatus artificial materials allows reduce level while femur determined be even compared normal model. Ligaments made material assume loads ensure mylar tape on sides high stresses ties higher modulus elasticity its plasticity. Conclusions. Aplasia bony ligament aplasia, brings values closer parameters Tensions restoration significantly, mechanical properties replaces ligaments. increased indicates it firmly holds arising research carried out accordance principles Helsinki Declaration. protocol approved by Local Ethics Committee participating institution. No conflict interests declared authors.