Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

Before proceeding to longer-term studies, we have studied the early clinical results of a new mobile-bearing total knee prosthesis in comparison with an established fixed-bearing device. Patients requiring bilateral knee replacement consented to have their operations under one anaesthetic using one of each prosthesis. They also agreed to accept the random choice of knee (right or left) and to remain ignorant as to which side had which implant. Outcomes were measured using the American Knee Society Score (AKSS), the Oxford Knee Score (OKS), and determination of the range of movement and pain scores before and at one year after operation. Preoperatively, there was no systematic difference between the right and left knees. One patient died in the perioperative period and one mobile-bearing prosthesis required early revision for dislocation of the meniscal component. At one year the mean AKSS, OKS and pain scores for the new device were slightly better (p < 0.025) than those for the fixed-bearing device. There was no difference in the range of movement. We believe that this is the first controlled, blinded trial to compare early function of a new knee prosthesis with that of a standard implant. It demonstrates a small but significant clinical advantage for the mobile-bearing design.

Original publication

DOI

10.1302/0301-620x.85b1.13233

Type

Journal article

Journal

The Journal of bone and joint surgery. British volume

Publication Date

01/2003

Volume

85

Pages

62 - 67

Addresses

Department of Orthopaedic Surgery, Nuffield Orthopaedic Centre, Oxford, Headington, UK.

Keywords

Humans, Prosthesis Failure, Arthroplasty, Replacement, Knee, Single-Blind Method, Prosthesis Design, Knee Prosthesis, Aged, Middle Aged, Female, Male