Abstract
BackgroundWe compared the midterm results after total knee arthroplasty (TKA) using PFC Sigma RP-F mobile model with PFC Sigma PS fixed model.Materials and methodsIn this randomized controlled trial, we analyzed 50 knees that underwent TKA with PFC Sigma RP-F and 60 knees with PFC Sigma PS fixed model. The follow-up period ranged from 76 to 104 months.ResultsThe knee score, function score, and radiographic evaluation were significantly not different between the two groups at final follow-up. No revisions, subluxations, dislocations, or infections were seen. Also, no radiographic evidence of component loosening, osteolysis, or malalignment was observed in any knee. The results for both groups show good patient satisfaction.ConclusionsThe midterm clinical and radiographic results of the two prostheses did not show significant differences between the two groups.Level of evidenceLevel of evidence is level II.
Highlights
Total knee arthroplasty (TKA) has become a standard operative procedure to alleviate pain and restore function in patients with end-stage knee arthritis [1]
Clinical Knee Society score (KSS), functional KSS, and radiographic evaluation were performed in all patients
The press-fit condylar (PFC) Sigma rotating platform (RP)-F system, which reduces the radius of curvature of the posterior femoral condyles offset and rotation of the bearing surface, improving internal rotation of the tibia for high flexion of the knee, is one such prosthesis
Summary
Total knee arthroplasty (TKA) has become a standard operative procedure to alleviate pain and restore function in patients with end-stage knee arthritis [1]. Both fixed and mobile bearing designs in TKA solve the main purpose of relieving pain and maintaining functional stability of the knee joint [2, 3]. Both designs show excellent survival rates and long-term durability [4,5,6,7]. We compared the midterm results after total knee arthroplasty (TKA) using PFC Sigma RP-F mobile model with PFC Sigma PS fixed model
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