OBJECTIVE:To analyze the evolution of a group of patients submitted to unicompartmental arthroplasty of the knee to treat arthrosis and in osteonecrosis that involve only the medial compartment. METHODS: 49 patients with unicompartmental knee arthrosis were evaluated. Ages ranged between 47 and 88 years, 12 of them male, and 37 female. All were submitted to the Miller-Galante type unicompartmental arthroplasty. After a minimum follow-up of four years the patients were evaluated objectively by the orthopedic exam and subjectively by the HSS system. RESULTS: Only one patient required a revision for total arthroplasty, four patients presented non-disabling pain, and three complained of sporadic instability, though not disabling. In the HSS evaluation, 30 patients had excellent results, 18 had good results, and one had a regular result. CONCLUSION: Unicompartmental arthroplasty is a good option for arthrosis and osteonecrosis of the medial compartment of the knee.
Osteonecrosis; Arthroplasty, replacement, knee; Knee joint; Treatment outcome; Retrospective studies
