Mechanical contributors to sex differences in idiopathic knee osteoarthritis

Table 1 The influence of limb alignment on the normal stress (relative to body weight) and strain for the medial (top) and the lateral (bottom) cartilage of the tibia and femur during the gait cycle

	Medial Cartilage Normal Stress		Medial Cartilage Normal Strain
Subject	Tibia	Femur	Tibia	Femur
1 (varus)	0.020	0.023	18.66	26.66
2 (normal)	0.017	0.020	17.01	20.67
3 (valgus)	0.016	0.018	14.99	16.16
	Lateral Cartilage Normal Stress		Lateral Cartilage Normal Strain
Subject	Tibia	Femur	Tibia	Femur
1 (varus)	0.001	0.003	4.64	6.79
2 (normal)	0.003	0.004	8.06	11.41
3 (valgus)	0.008	0.010	9.22	11.38

The data were obtained at 25% of the stance phase when both the axial load and the varus knee moment were at peak values. The results showed the magnitude of the stresses and strains in the medial compartment increased with varus alignment, whereas the magnitude of the stresses and strains in the lateral compartment increased with valgus alignment [61].

ISSN: 2042-6410