Table 1. Ratliff scoring standards.

Grade	Clinical manifestation	Imaging inspection
Excellent	No pain, Normal or slightly limited hip motion, Normal daily activity	Normal or mild deformity of the femoral neck
Good	Occasional pain, Limited hip joint movement <50%, Normal daily activities	Severe deformity of the femoral neck, mild osteonecrosis of the femoral head
Poor	Persistent pain, Limited hip movement >50%, Limited daily activities	Degenerative arthritis, joint fusion