Fig. 2From: Additive-manufactured Ti-6Al-4 V/Polyetheretherketone composite porous cage for Interbody fusion: bone growth and biocompatibility evaluation in a porcine modelThe ROIs (region of interest) of bone ongrowth analysis and bone ingrowth analysis were shown. ROI of bone ongrowth was defined as 0–500 μm around metallic implant border. ROI of bone ingrowth was defined as the area inside metallic implant border. The border was calculated by computer using shrink-warp algorithmBack to article page