Secondary shallow acetabulum
The hip joint sinks only the acetabulum, but also the stability of the joint.
The flaccidity of the capsule and muscles causes that the head is not deep in the acetabulum and causes shallowness of the acetabulum where the alpha angle according to the Graf does not show it and beta also because the head slides out of the pan without moving the limbus and there is also no standard position because the head is not in the socket.
asymmetry in the appearance of the Hip joints Requires further observation and a different approach to the principles of treatment not abduction and the head in the acetabulum is needed
Shallow acetabulum is 9 times more than dysplastic acetabulums according to American reaserch.
the Graf method has its limitations the head must be in the acetabulum in the flaccid joints so it is not and the method of measuring the executioners is meaningless and introduces an error because we assess the secondary acetabulum with a horizontal shift and not vertically.
And the angles are incorrect
The Graf method cannot distinguish the secondary acetabulum from the real one and makes an error therefore the asymmetry in the appearance of the hips is crucial and clinical examination in this case helps and X-ray examination must be done.
The narrower the ultasound head, the worse the displacement assessment and we do not see where and how the acetabulum really is, especially in complete dislocations typ IV
in the x-ray also this is not visible in the initial stage because everything is of cartilage.
The linear head does not work narrower than the displacement of the head
therefore, depending on the place of application of the head, we have different images of another fragment of the acetabulum.
The convex head is better for observing displacement. But the measurement of the angles is not precis