Figure 2.

(Left) Force and rotation differences between the applied gait patterns alter the maximum contact stress magnitude and the time at which it occurs during stance phase of gait. DEA models loaded with the dysplastic and matched control gait patterns developed pre-operative maximum contact stress near toe-off, whereas the models loaded with normal or post-THA gait patterns developed maximum contact stress shortly after heel-strike. (Right) DEA models loaded with the dysplastic and matched control gait patterns had average decreases in maximum contact stress after PAO, which were significantly (p<0.001) different from the increases in maximum contact stress for models loaded with arthritic and normal gait patterns. Statistical significance is indicated with the following symbols: *dysplastic vs. post-THA. ^#dysplastic vs. normal, ^†dysplastic vs. matched control. ^§post-THA vs. normal. ^¥post-THA vs. matched control. ^£normal vs. matched control.