bioprosthesis

Prosthesis, usually heart valve, composed of biological material and whose durability depends upon the stability of the material after pretreatment, rather than regeneration by host cell ingrowth. Durability is achieved 1) mechanically by the interposition of a cloth, usually polytetrafluoroethylene, between the host and the graft, and 2) chemicall...
Found on http://www.encyclo.co.uk/local/20973

bioprosthesis

(bi″o-pros-the┬┤sis) a prosthesis made of biological material.
Found on http://www.encyclo.co.uk/local/21001
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