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Abstract

Experiments have been devised to study the rate of ingrowth of bone into porous metal with pore sizes up to 100 μ and to study the significance of a gap between the porous metal surface and bone.

When the porous coat was in direct apposition with bone, the implant was firmly locked in place after a three week period and the plateau value of implanttissue shear strength was reached at four weeks. A gap of 1.5 mm between the bone and the implant was bridged by new bone wihtin four weeks.