Spontaneous Mineral Deposition in Sponge Biopsy Connective Tissue.

Abstract
Polyvinyl alcohol sponges implanted subcutaneously in rats induce connective tissue ingrowth. That this is not a valid model for studying electrolytes in such connective tissue is demonstrated by finding salt deposition resembling hydroxyapatite at the sponge-tissue interspace. Also the potential disadvantage of using this material as a pliable human prosthesis is pointed out. This phenomenon was not noted in other materials tested.

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