Abstract
There are several prosthetic knee designs currently in use. There are however very few studies comparing long-term functional outcomes between patients using different models of knee pros-thesis in elective knee replacement. In this study, we used the validated Oxford Knee Score (OKS) to retrospectively compare the outcomes of a total of 1635 patients who had an elective total knee replacement in a large District General Hospital, using fifteen different models of knee prosthesis, over a ten-year period. The average scores reported by all patient groups showed significant improvement by three months post-operatively (pre-operative mean score 15.8, post-operative mean score 39.4, p < 0.05), and remained similar for all models of prosthesis used over the total ten-year period. Based on the OKS as an assessment tool, we report no significant difference in long-term functional outcomes for this group of patients following an elective knee replacement, regardless of the type of prosthesis used.
Highlights
Over 70,000 knee replacements are performed in the United Kingdom each year, and this number is steadily in-How to cite this paper: El-Osta, B., Ghoz, A., Dawson, A. and Andrews, M. (2014) A Comparison of Patient Outcomes Following Prosthetic Knee Replacement Using a Variety of Knee Prosthesis: A Ten-Year Study
In this paper we provide a direct comparison between a large number of prosthetic designs, over an extended period of time, with the aim of obtaining information about the influence, if any, of the choice of prosthesis on long-term patient outcomes after total knee replacement
The average Oxford Knee Score (OKS) score pre-operatively was 15.8, and at 3 months post-operatively was 39.4 (Table 3). This was statistically significant for all models of prosthesis in the series with available pre-operative scores
Summary
Over 70,000 knee replacements are performed in the United Kingdom each year, and this number is steadily in-How to cite this paper: El-Osta, B., Ghoz, A., Dawson, A. and Andrews, M. (2014) A Comparison of Patient Outcomes Following Prosthetic Knee Replacement Using a Variety of Knee Prosthesis: A Ten-Year Study. The commonest indication for knee replacement remains degenerative osteoarthritis of the knee, and the majority of patients undergoing this operation are over 65 years of age. The vast majority of procedures are successful and patients report significantly improved pain and function in the immediate and long-term post-operative period [2]. The risk of post-operative complications remains; most notably, prosthetic loosening and instability, leading to prosthesis failure and the need for revision surgery. This occurrence is estimated at less than 1% per year, with an overall rate of 5% - 10% at 10 years [3]. Several models have been designed with the aim of optimising the bone–prosthesis interface and kinetics, to improve functionality and long-term prosthesis survival
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