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McNeal-strained light mirographs (40 × , 200 × ) of transverse sections of bone specimens filled with the porous scaffolds of H200 (A), H320 (B), H450 (C), and H600 (D) at 4 weeks of post-implantation. OB: Original maturing bone; NB: Newly formed neo-bone; F: Fibrous tissue; CF: Collagenous, non-calcified fibrous tissue; S: Bioceramic strut; Hollow arrow: newly formed vessels; Solid arrow: interface between native bone and materials.
