Flask for microwave processing of dental protheses
AssigneeUniversity of Pittsburgh
InventorsRobert E. McKinstry, Ivo Zini
Life of this patent
Estimating the term…
Abstract
The present invention relates to an improved dental flask that is suitable for use in microwave, irradiation processing of dentures, obturators and other dental prosthesis in which the dental flask is manufactured from a composition that is a mixture of a predominant amount of a liquid, polymerizable plastic resin mixed with lesser amounts of a gypsum-based material and plastic resin fibers.
Claims16
A dental flask suitable for use in microwave, irradiation processing of dentures, obturators and other dental protheses manufactured from a composition comprising a predominant amount of a liquid, polymerizable plastic resin selected from the group consisting of methyl methacrylate, polystyrene, polycarbonate and polyesters mixed with lesser amounts of (i) a gypsum-based material selected from the group consisting of plaster (Type II), artificial dental stone (Type III) and improved dental stone (Type IV), and (ii) fibers selected from the group consisting of nylon fibers, Dacron.TM. fibers and glass fibers.
A composition suitable for a dental flask usable in microwave, irradiation processing of dentures, obturators, and other dental protheses comprising a predominant amount of a liquid, polymerizable plastic resin mixed with (i) lesser amounts of a gypsum-based material and (ii) fibers selected from the group consisting of plastic resin fibers and glass fibers, said composition exhibiting a compression strength of at least 1500 psi.
Dependencies are inferred from the claim text.