مقايسه تاثير پروتزهاي با سطح مفصلي متحرك و ثابت در آرتروپلاستي كامل زانو

Comparison of Mobile-Bearing and Fixed-Bearing Total Knee Arthroplasty

Background: The role of a mobile-bearing knee arthroplasty is still not clear. This study was designed to compare the mobile and fixed-bearing prosthesis. Methods: In 30 knees a fixed-bearing and in 38 knees a mobile-bearing prosthesis was used. The results were compared using the "Knee Society Scoring System". Results: The mobile-bearing group of patients had an average age of 65 and 34 months average follow-up. The fixed-bearing group had an average age of 69 years and a mean follow-up of 30 months. The average knee score, functional score and overall score in the mobile-bearing group rose from 29, 45, 73 to 64, 67, 128; and in the fixed-bearing group from 31.7, 34, 65.9 to 68, 57, 125 prospectively. The difference between two groups was not significant statistically. Conclusion: Although in both groups the average knee scores increased after the operation, there were, however, no significant difference between knee scores in the two types in short-term, and no preference between two types of prosthesis.