Skip to the content

The relationship of the angle of immobilisation of the knee to the force applied to the extensor mechanism when partially weight-bearing: a gait-analysis study in normal volunteers

Jones, RK, Khan, WS, Nokes, L and Johnson, DS 2007, 'The relationship of the angle of immobilisation of the knee to the force applied to the extensor mechanism when partially weight-bearing: a gait-analysis study in normal volunteers' , Journal of Bone and Joint Surgery - British Volume, 89-B (7) , pp. 911-914.

Full text not available from this repository. (Request a copy)

Abstract

We describe the influence of the angle of immobilisation during partial weight-bearing on the forces across the extensor mechanism of the knee. Gait analysis was performed on eight healthy male subjects with the right knee in an orthotic brace locked at 0°, 10°, 20° and 30°, with the brace unlocked and also without a brace. The ground reaction force, the angle of the knee and the net external flexion movement about the knee were measured and the extensor mechanism force was calculated. The results showed a direct non-linear relationship between the angle of knee flexion and the extensor mechanism force. When a brace was applied, the lowest forces occurred when the brace was locked at 0°. At 30° the forces approached the failure strength of some fixation devices. We recommend that for potentially unstable injuries of the extensor mechanism, when mobilising with partial weight-bearing, the knee should be flexed at no more than 10°.

Item Type: Article
Themes: Subjects / Themes > R Medicine > R Medicine (General)
Subjects / Themes > Q Science > QP Physiology
Health and Wellbeing
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Environment and Life Sciences
Journal or Publication Title: Journal of Bone and Joint Surgery - British Volume
Publisher: British Editorial Society of Bone and Joint Surgery
Refereed: Yes
ISSN: 0301620X
Depositing User: H Kenna
Date Deposited: 15 Dec 2008 17:04
Last Modified: 20 Aug 2013 16:46
URI: http://usir.salford.ac.uk/id/eprint/216

Actions (login required)

Edit record (repository staff only)