Effect of 3D Printing Technology in Proximal Femoral Osteotomy in Children with Developmental Dysplasia of the Hip

Table 2

McKay’s criteria for clinical evaluation [6, 7].

Grade	Criteria
Excellent	Stable, painless hip; no limp; negative Trendelenburg sign; full range of motion
Good	Stable, painless hip; slight limp; slight decrease in range of motion
Fair	Stable, painless hip; limp; positive Trendelenburg sign; and limited range of motion or a combination of these
Poor	Unstable or painful hip or both; positive Trendelenburg sign