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Knee ; 22(2): 122-5, 2015 Mar.
Article in English | MEDLINE | ID: mdl-25533210

ABSTRACT

BACKGROUND: The Medial Rotating Knee replacement (MRK) was first used in 1994, reporting high rates of satisfaction. It is designed to replicate natural knee kinematics and improve stability and function. There are limited studies on the mid-term clinical outcomes, in particular in a district general hospital (DGH) environment. This is the first study that we are aware of that evaluates the learning curve of the implementation of this knee system in this environment. PATIENTS/METHOD: Between 2007 and 2009 we performed 38 consecutive MRK replacements (MAT ORTHO, UK) in 36 patients. The mean follow-up was four years. Patients were evaluated clinically, using OKS and patient questionnaire and radiographically (good/acceptable/poor) to assess outcome. RESULTS: Mean age was 73.0 years. Mean pre-operative OKS was 17.7 (range 8-29), which rose to 38.1 (range 23-48) at latest follow up (p<0.005). Overall 71% of the patients were either satisfied (29%) or very satisfied (42%). 81% felt an improvement of the ability to go up or down stairs and 92% felt stable. All poor radiographic and the majority of acceptable outcomes were experienced in the first 50% of cases. CONCLUSION: The MRK can be successfully implanted in a DGH environment. It improves pain and function comparably to standard TKRs, however, subjective improvement may be higher. Radiographic evaluation shows an acceptable learning curve. LEVEL OF EVIDENCE: Level IV case series.


Subject(s)
Arthroplasty, Replacement, Knee/methods , Knee Joint/surgery , Knee Prosthesis , Aged , Aged, 80 and over , Follow-Up Studies , Hospitals, General , Humans , Knee Joint/diagnostic imaging , Learning Curve , Middle Aged , Osteoarthritis, Knee/surgery , Patient Satisfaction , Radiography , Retrospective Studies , Surveys and Questionnaires , Treatment Outcome
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