Patent ID: 6139322
Filing Date: 2000-10-31
Classification: A61K,C08F

Abstract:
An interpenetrating polymer network artificial dental tooth having a reduced coefficient of friction in combination with denture base formed into a denture comprising a tooth body, and denture base formed into a denture, said tooth body consisting essentially of an interpenetrating polymer network having a polymer matrix, said interpenetrating polymer network being formed by polymerization of monomers of a polymer matrix forming composition, said polymer matrix forming composition comprising a blend of particulate material and liquid polymerizable monomers, said liquid polymerizable monomers comprising monofunctional polymerizable monomer and di or polyfunctional crosslinking agent reactive with said polymerizable monomer,said particulate material comprising from about 10% to about 70% by weight of said tooth body, said particulate material comprising self lubricating polymer particles and crosslinked polymer particles having average diameter up to about 500 microns,said crosslinked polymer particles being sufficiently crosslinked as to maintain substantially their structural identity when exposed to said monomers,said crosslinked polymer particles being substantially swollen by imbibing at least 10% by weight of said crosslinked polymer particles of said monomers,said self-lubricating particles comprising a polymer of the general formula: ##STR5## wherein p is an integer from 100 to 1,000,000, (--) is a single or a double bond;when (--) is a double bond R, R' and R.sub.11 independently are hydrogen, or a lower alkyl of from 1 to 6 carbons, and R.sub.9 and R.sub.10 are not present; when (--) is a single bond R, R', R.sub.9, R.sub.10, and R.sub.11 independently are hydrogen, fluorine or a lower alkyl of from 1 to 6 carbons,said self-lubricating particles being effectively bonded to and distributed in said polymeric matrixsaid interpenetrating polymer network artificial tooth comprising at least 0.1 percent by weight of said self-lubricating particles and said interpenetrating polymer network artificial tooth effectively having a reduced coefficient of friction compared to said interpenetrating polymer network artificial tooth from which said self-lubricating particles are omitted,said denture having a bond strength between said tooth and said denture base of at least 4,480 psi.