Article

The consequences of lower limb torsion deformity on knee loading in knee
osteoarthritis are poorly understood. The purpose of this study was to quantify
the associations between the mechanical axis, tibial torsion and knee loading in
subjects with medial knee OA and in controls. METHODS: Twenty-four subjects:
end-staged medial knee osteoarthritis (OA) with apparent torsion deformity (TKO,
n=6) and without torsion deformity (KOA, n=8) and controls (CON, n=10) were
imaged using long standing lower extremity (LSLE) radiographs and computed
tomography (CT). Medial knee loading was assessed using the internal knee varus
moment determined by gait analysis. The LSLE mechanical axis, CT tibial torsion
and the foot progression angle were used to predict medial knee loading. RESULTS:
The TKOs had significantly greater mechanical axis varus and knee varus moment
compared to KOAs and CONs.
The regression model predicting medial knee loading
using the mechanical axis (beta=0.898), tibial torsion (beta=0.264) and foot
progression angle (beta=-0.369) showed a goodness of fit of 0.774. CONCLUSIONS:
Medial knee loading was predicted by the mechanical axis and the foot progression
angle. Future longitudinal studies are needed to assess the role of tibial
intorsion during disease progression and following total knee replacement surgery.
CI - Copyright (c) 2011 Elsevier B.V. All rights reserved.

Langue : ANGLAIS