CafeDoor

shows that the femoral neck angles a bit forward ( anteversion = forward tilt). Babies have extra anteversion to fold flat in the womb. The deRotation part of VRO is (saving 12 years of this anteversion gradually going away) so as to move the femoral head away from the CDH/DDH anterior cup damage. With that pressure turned backward, the cup can heal itself in the front as the causal pressure is gone. Works fine for CDH/DDH. But it points the femoral head right into the trouble spot more so when we have PDH ! Besides, where the femoral head is pointing in CP is much more from where the entire leg is pointing or crossing than anteversion.

Everybody has heard of the shoulder rotator cuff. Well, the hips have them too. It is a stack of short deep muscles that converge from inside and outside the pelvis to the upper femur just behind and above the head/neck area – a lot like the shoulder. We all KNOW [name your favorite] a baseball pitcher or two [or three] whose pitching went bad as their shoulders 'subluxed' (slid off center of the shoulder shallow cup). Why??? Muscle imbalance. Because those muscles were made crazy strong striking out high paid home-run hitters. SOME of the muscles meant to stabilize the ball in the shallow socket were overdeveloped in the throwing direction, but not maintaining balance in the full circular array of the cuff whose normal job is stability – centering the ball, by tension, at dead center. Pitcher? Get a job color commenting. Your pitching days are over.