Appeal No. 1998-2813
Application No. 08/463,203
Claims
19. A medical device for tissue regeneration formed using a
solid free-form fabrication method comprising a matrix of
successive layers of biocompatible polymeric material having
interconnected pores extending throughout the matrix suitable of
seeding or ingrowth of cells.
21. A medical device for bone regeneration formed using
three dimensional printing comprising a matrix of successive
layers of biocompatible composite material having interconnected
pores extending throughout the matrix suitable for seeding or
ingrowth of cells, having pore size of at least five to forty
microns in diameter,
wherein the methods comprises
a) spreading a first dispersion of a resorbable powder
selected from the group consisting of calcium phosphate,
hydroxyapatite, and calcium carbonate onto a bed,
b) printing a layer comprising a second dispersion of
biocompatible polymer or composite powder in a solvent which
binds the first powder to the second biocompatible polymer or
composite powder at locations where it is desired to have walls,
and
c) repeating step b until the desired matrix is made.
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