Patent ID: 8765836

Claim:
A dental appliance comprising a hard, shaped body having at least one portion comprising a polymerized blend of: A) from 0% to about 50% by weight of an uncrosslinked polymer capable of dissolving in component B); B) from about 2% to 45% by weight of a monofunctional polymerizable monomer; C) from about 10% to 40% by weight of a first crosslinked polymer in the form of ground particles having average diameters up to 500 microns; D) from about 5% to 40% by weight of a second crosslinked polymer in the form of discrete particles having average diameters up to 500 microns and being easily swellable by said monomer; and E) from about 5% to about 40% by weight of a di- or polyfunctional crosslinking agent; wherein said first crosslinked polymer is different from said second crosslinked polymer, wherein the first crosslinked polymer particles are not capable of imbibing the monofunctional polymerizable monomer while the second crosslinked polymer particles are capable of imbibing the monofunctional polymerizable monomer.