Porous Polymeric Orthopedic Implants
The use of polymer sponges as non-weight-bearing bone prostheses has received some degree of investigation. Encouraged by reports on the successful use of polyvinyl sponge, a polymer made by treating polyvinyl alcohol with formaldehyde and sulfuric acid, Struthers  in 1955, tested its compatibility with soft tissue and bone. Using nine young adult dogs, he placed the material in the periosteal bed of the ribs, the sternum, and in the rectus abdominis muscle. He reported that bone ingrowth occurred within four weeks of implantation, and that the addition of chips or small particles of autogenous bone to the implant increased the extent of ingrowth. Histologic evaluation revealed that no foreign body reaction had occurred up to a period of 20 weeks after implantation.
KeywordsHigh Density Polyethylene Foreign Body Reaction Bone Ingrowth Autogenous Bone Butyl Acrylate
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