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Updated: Sep 30, 2026

The Polyvinyl Alcohol Sponge Model Implantation
Published on: April 18, 2012
Disappearance of the polyurethane cover of the Ashley Natural Y prosthesis
Abstract:
Polyurethane foam implanted in our patient was neither inert nor permanent. Clinical observations and animal studies suggest that all polyurethanes implanted to date have slowly disintegrated and have been absorbed in tissue. This process takes several years to complete. The exact time sequence and histology are not known.
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