Unicompartmental Knee Arthroplasty: Short-Term Results

Abstract

Background. Among the methods of surgical treatment of early stages medial knee osteoarthritis in the partial knee replacement (PKR) becomes more and more relevant. The relevance and increasing number of PKR are confirmed by data from various national registers.The aim of the study was to research the early functional results of PKR and to analyze the complications at various stages of the postoperative period.Material and Methods. Study design: a single-center prospective study. The results of 90 operations of PKR in the period from March 2018 to April 2020 are presented. Assessment of knee function and quality of life of patients was performed according to three scalesquestionnaires: KOOS, WOMAC, SF-36, which were filled in preoperatively and then at 3, 6, 9, 12, 18 months. after surgery. Patients within the reporting period provided X-rays and filled in the scales at the face-to-face examination and at remote contact.Results. The most significant improvement of quality of life and median values of the functional results observed after 3 months, and after 18 months. After replacement the best median functional outcome scales KOOS, WOMAC, SF-36 — 79,4 (73,6–84,3); 27,1 (24,8–30,6); 89,1 (85,3–92,6) compared with the functional results obtained before surgery 32,3 (22,8–38,4); 73,6 (63,6–78,8); 35,2 (31,3–42,1); p = 0,027; p = 0.023; p = 0,028, respectively. A negative correlation was obtained between BMI and functional outcome (p = 0.027, R = -0.7).Conclusion. PKR allowed us to achieve an improvement in the quality of life and functional results already in the early postoperative period (from 3 to 18 months after the operation). The improvement of the operating technique, the analysis of errors and the regularity of the performed PKR will improve the results of PKR and minimize the number of complications.