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In vivo bone morphology stained with Sanderson’s rapid bone stain (Dorn & Hart Microedge, Loxley, AL) and counterstained with acid fuchsin. (a) Nonporous titanium cage (NPTi), (b) 60% porous titanium cage (PTi), and (c) porous tantalum cage (PTa); (d) modified bone healing scores for NPTi, PTi, and PTa. n = 6, *** p < 0.001, **** p < 0.0001.
