Table 1.

Measurements in adult hip.

Measurement	Measure	Normal value
Acetabular depth ratio	Deepness of acetabulum	>250
Center-edge angle	Coverage of acetabulum	20–40
Tönnis angle	Slope of the sourcil	0–10°
Sharp angle	Acetabular slope	<45°
Crossing ratio	Percentage of acetabular walls crossing	<20%
Alpha angle	Degree of bulging of the femoral head-neck junction	Male > 68°  Female > 50°
Femoral head-neck offset	Offset of the femoral head with regard to most prominent aspect of the femora neck	>10 mm
Offset percentage	Femoral head-neck offset related to femoral head diameter	>0.18