Patent ID: 9295533
Filing Date: 2016-03-29
CPC Classification: A61C,A61K,B22F,C22C

Claim Text:
1. A material composition for use in forming a porous metal structure of high void volume during heat treatment between about 1000° C. to about 1200° C. in the preparation of a dental restoration comprising a volatile binder and a composite of metal particles in a matrix including low fusing temperature metal particles which melt at said heat treatment temperature, zero to a relatively minor percentage of high fusing temperature metal particles, which will not melt at said heat treatment temperature and between 65% to 85% medium fusing temperature metal particles by volume with the medium fusing temperature metal particles having a non-spherical platelet shape of thin cross-section, and a jagged edge curvature possessing a melting characteristic which will cause partial melting of all of the medium fusing temperature metal particles during heat treatment of the material composition at said heat treatment temperature and over a heat treatment time of between 1 to 10 minutes such that between 10% to 50% by volume of the particle mass of each the medium fusing temperature metal particles melt during heat treatment and wherein the volatile binder burns off and all of the low fusing temperature metal particles completely melts during heat treatment leaving a residual metal composition of the non-melted portion of the medium fusing temperature metal particles alone or in combination with the relatively minor percentage of high fusing temperature metal particles, if present, for forming a porous skeleton structure of high density.