Patent ID: 6506816
Filing Date: 2003-01-14
Classification: A61K,A61P

Abstract:
A dental resin cement material for adhering a prefabricated prosthetic device or a direct restorative material to an oral surface, the dental resin cement material comprising a mixture comprising:a) a filler; b) a polymerizable component, which may be monomers, oligomers, or polymers, containing a polymerizable group; c) a polymeric handling modifier which is present, and is present in an amount of less than 20% by weight, wherein the polymeric handling modifier has a weight average molecular weight between about 500 and about 100,000, and further wherein the polymeric handling modifier is selected from the group consisting of methacrylate modified polycaprolactonediols, methacrylate modified polyethylene glycols, polyethylene glycol methyl ethers, methacrylate modified polytetramethylene oxides, polytetramethylene oxides, N-polyvinyl pyrrolidones, polymeric ethoxylated Bisphenol A dimethacrylates, dicarboxy terminated polybutadienes, hydroxyl endcapped polybutadienes, copolymers of Bisphenol A and epichlorohydrin, and combinations thereof; and d) a polymerization initiator; wherein the polymeric handling modifier and the polymerizable component are selected such that upon visual inspection by the unassisted eye of the polymeric handling modifier dispersed in the polymerizable component at 25Â° C. more than one phase cannot be discerned; wherein components a), b), and c) are present in an amount effective to provide a material having a Viscosity vs Shear Rate Curve at a temperature of 25Â° C.Â±1Â° C. that fits a power law model curve fit of F(x)=A xB wherein B is less than about âˆ’0.01, and said material correlating to said Curve at a correlation value greater than 0.85 for both increasing and decreasing shear rate over at least ten logarithmically spaced data points for both the increasing direction and the decreasing direction over a shear rate range, having a lowest value of 0.4-0.5 sâˆ’1 and a highest value of 20-25 sâˆ’1; and wherein said dental resin cement material does not utilize water as its chemistry for curing.