ANATOMICAL AND FUNCTIONAL PREREQUISITES FOR THE DEVELOPMENT OF ENDOPROSTHESIS INSTABILITY AFTER MONOCANDYLAR KNEE ARTHROPLASTY

Monocondylar knee arthroplasty allows to restore normal kinematics and function of the joint in case osteoarthritis limited medial or lateral part joint. Objective. To identify patterns features secondary anatomical functional changes after monocandylar depending on patientʼs gender, weight, etiology gonarthrosis, magnitude primary deformity bone tissue condition. Methods. The results examination 71 patients (age 37–83 years, follow-up period 3–10 years) were analyzed. In 20 (28.2 %) patients, problems with occurred. joint: increased frontal angle — 8 (40 %), decreased mobility 12 (60 pain implantation area 10 (50 %). Results. Preoperative factors that may affect outcome identified. main one is reduced density, especially localized osteoporosis. presence osteoporotic areas arthroplasty, risk endoprosthesisinstability can reach 100 %. second important factor deformities more than 10°. Other factors, such as obesity, meniscal crossed ligament injuries, fractures femoral tibial condyles, also development complications, a simultaneousdecrease mineral density and/or significant Conclusions. reliable, costeffective, low-traumatic method treating but subject clear indications for its implementation. long term, osteoporosis, ligamentous 10° develop signs endoprosthesis instability.