Similar TKA designs with differences in clinical outcome
نویسندگان
چکیده
BACKGROUND AND PURPOSE To try to improve the outcome of our TKAs, we started to use the CKS prosthesis. However, in a retrospective analysis this design tended to give worse results. We therefore conducted a randomized, controlled trial comparing this CKS prosthesis and our standard PFC prosthesis. Because many randomized studies between different TKA concepts generally fail to show superiority of a particular design, we hypothesized that these seemingly similar designs would not lead to any difference in clinical outcome. PATIENTS AND METHODS 82 patients (90 knees) were randomly allocated to one or other prosthesis, and 39 CKS prostheses and 38 PFC prostheses could be followed for mean 5.6 years. No patients were lost to follow-up. At each follow-up, patients were evaluated clinically and radiographically, and the KSS, WOMAC, VAS patient satisfaction scores and VAS for pain were recorded. RESULTS With total Knee Society score (KSS) as primary endpoint, there was a difference in favor of the PFC group at final follow-up (p = 0.04). Whereas there was one revision in the PFC group, there were 6 revisions in the CKS group (p = 0.1). The survival analysis with any reoperation as endpoint showed better survival in the PFC group (97% (95% CI: 92-100) for the PFC group vs. 79% (95% CI: 66-92) for the CKS group) (p = 0.02). INTERPRETATION Our hypothesis that there would be no difference in clinical outcome was rejected in this study. The PFC system showed excellent results that were comparable to those in previous reports. The CKS design had differences that had considerable negative consequences clinically. The relatively poor results have discouraged us from using this design.
منابع مشابه
Similar TKA designs with differences in clinical outcome A randomized, controlled trial of 77 knees with a mean follow-up of 6 years
متن کامل
Patient Satisfaction Following Total Knee Arthroplasty: Comparison of Short-Term Results in Rheumatoid Arthritis and Osteoarthritis
Background: Due to the obvious differences in the natural course of rheumatoid arthritis (RA) and osteoarthritis (OA),different functional outcomes might be expected after Total Knee Arthroplasty (TKA) in these distinct patients. Althoughseveral studies have reported the objective outcome of TKA in RA and OA patients, few studies have compared postoperativepatient-satisfaction levels.Methods: I...
متن کاملComputed Tomographic measurement of distal femor rotation in Iranian population
Background: Proper rotation of components in total knee arthroplasty (TKA) will largely affect the postoperative outcome. Ethnical variation may affect rotational profile. We aimed to evaluate distal femur rotation in Iranian population using transepicondylar axes. Methods : From a total of 450 knee CT scans and via consecutive sampling, 150 qualified subjects with normal lower extremities ...
متن کاملClinical and Biomechanical Evaluations of Staged Bilateral Total Knee Arthroplasty Patients with Two Different Implant Designs
BACKGROUND Various implants of total knee arthroplasty (TKA) are used in clinical practice and each presents specific design characteristics. No implant managed this day to reproduce perfectly the biomechanics of the natural knee during gait. OBJECTIVES We therefore asked whether (1) differences in tridimensional (3D) kinematic data during gait could be observed in two different designs of TK...
متن کاملDoes a Previous High Tibial Osteotomy (HTO) Influence the Long-term Function or Survival of a Total Knee Arthroplasty (TKA)?
High tibial osteotomy (HTO) is a well established technique for the treatment of medial osteoarthritis ofthe knee with varus malalignment. The outcome of total knee arthroplasty (TKA) after HTO remains uncertain.The aim of this paper is to revise the literature with the aim of answering the following question: Does a previous (HTO)influence the long-term function or survival of a TKA?. The sea...
متن کامل