Representative histological images of defects in sheep that were sacrificed between 6 – 20 days due to tibial plateau fractures. (A,B) Low magnification images of (A) CG/nHA-PEUR and (B) BGCG/nHA-PEUR tibial plateau defects. (C,D) High magnification images of (C) CG/nHA-PEUR and (D) BGCG/nHA-PEUR tibial plateau defects near the host bone interface. B denotes bone (stained red), P residual nHA-PEUR polymer (stained light gray), and CG residual ceramic granules (stained dark gray) (E,F) Low magnification images of (E) CG/nHA-PEUR and (F) BGCG/nHA-PEUR femoral plug defects. (G,H) High magnification images of (G) CG/nHA-PEUR and (H) BGCG/nHA-PEUR femoral plug defects near the host bone interface. BG particles appear transparent[1] and CG particles appear dark gray.[2]