Fig. 2

Silk protein rod implantation procedure. a Silk protein rod implantation post-core decompression. b The remaining osteonecrotic space was filled with artificial bone. c Completion of silk protein rod implantation. d Force loading diagram. Hip contacting force J = 1620 N, abductor force N = 1061 N, iliotibial band force R = 1720 N, ψ = 24.4°, θ = 29.5°, α = 135°