Abstract
Background
The purpose of this study is to report the outcome of navigation-assisted cruciate-retaining total knee arthroplasty (TKA) using one type of cemented, second-generation, floating-platform (FP), mobile-bearing system.
Methods
We retrospectively reviewed 42 patients (51 knees) who underwent cruciate retaining TKAs using e.motion-FP prostheses under navigational guidance. The preoperative diagnosis was osteoarthritis in all knees except one rheumatoid arthritis. There were 2 men (2 knees) and 40 women (49 knees) with a mean age of 64.0 ± 4.7 years (range, 51 – 76 years) at the time of index surgery. The mean follow-up was 120.0 months (range, 106 – 126 months). Clinical and radiographic results as well as mechanical survival rate of this type prosthesis were investigated at a mean follow-up of 10 years.
Results
The mean mechanical femorotibial angle was improved from 11.7° ± 3.3° (range, 5.0° to 19.7°) preoperatively to 1.4° ± 1.7° (range, −2.9° to 6.4°) at the latest follow-up. No prosthesis-related complications such as bearing dislocation or breakage occurred and no knees showed aseptic loosening or progressive osteolysis. Kaplan-Meier survivorship at 10.5 years was 100% with an endpoint of revision for any prosthesis-associated reason.
Conclusions
The emotion-floating platform mobile-bearing design yielded satisfactory mid-term durability and implant performance under navigational guidance.
