Bone prostheses with direct cast macrotextured surface regions and method for manufacturing the same
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United States of America Patent
Stats
-
Feb 3, 1998
Grant Date -
N/A
app pub date -
Jun 1, 1995
filing date -
Feb 18, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An implantable article having on at least a portion of its exterior surface an integral, as-cast macrotextured surface having pores with undercut edge profiles is provided. The integral, as-cast macrotextured surface is able to be formed on the implantable articles by a modified casting process. As part of a casting process, positive models of the articles to be cast, or parts thereof, are formed by stereolithographic techniques. Cavities or molds, representing negative images of the articles to be cast, are then formed by encasing one or more models in a refractory material. The positive models are then extracted by heating and thus melting the material from which they are made. Thereafter, molten casting material can be poured into the resulting mold to obtain the implantable articles.
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