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Alpha angle - developmental dyplasia of the hip

The alpha angle is a measurement used in ultrasonographic assessment of developmental dysplasia of the hip (DDH).

The angle is formed by the acetabular roof to the vertical cortex of the ilium. This is a similar measurement to the acetabular angle.

The normal value is greater than or equal to 60 degrees. Less than 60 degrees suggests dysplasia of the acetabulum.

The term "alpha angle" is also used in a separate and unrelated context in evaluation of femoroacetabular impingement.

See also


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