Fig. 7From: Additive-manufactured Ti-6Al-4 V/Polyetheretherketone composite porous cage for Interbody fusion: bone growth and biocompatibility evaluation in a porcine modelHistological analysis and fluorescence microscopy. Sections a–d were stained with Sanderson’s Rapid Bone Stain and counterstained with acid fuchsin (RBS). Sections E–H were examined with fluorescence microscopy to identify new bone formation labeled with tetracycline. A and E: PEEK cage; B and F: Ti alloy nonporous cage; C and G: Ti alloy/PEEK composite cage with 60% porosity; and D and H: Ti alloy/PEEK composite cage with 80% porosity. A and E: white arrows indicate a gap between the bone and implant. B and F: white arrows denote close contact between the bone and implant, with new bone formation on the interface. C, D, G, and H: white arrows represent bone growth into the porous structure of the implantBack to article page