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Porous tantalum integration into scaffold-free cartilage constructs. (A) A 1 cm–diameter 4-week tantalum-cartilage composite construct. Cartilage is indicated with an arrow. (B, C) Plastic sections stained with toluidine blue. (C) is a magnified image of (B), showing cartilage growth around tantalum components (arrowheads), which are pseudo-colored black to increase visibility.
