The Hilgenreiner line is also used as a reference line to calculate the acetabular angle—this is the angle between the Hilgenreiner line and a further line drawn tangential to the acetabular roof. At birth, this angle should measure less than 28°. As the normal hip joints mature, they become progressively shallower and by the age of 1 year the acetabular angle should measure less than 22°. In DDH (and in neuromuscular disorders such as cerebral palsy and some skeletal dysplasias), the acetabular angle will be increased. There are excellent illustrations of these lines provided in the references.
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- Please see the Test 2, Image 14 references regarding the imaging of suspected physical abuse in infants and young childrenGoogle Scholar
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