초록 ▼

A process for producing a radiopaque cement comprises reacting a polymer containing free carboxyl groups (generally a homo or copolymer of acrylic acid) with a particulate acid-leachable source of polyvalent metal ions (such as an acid-leachable glass) in the presence of water and strontium fluoride

A process for producing a radiopaque cement comprises reacting a polymer containing free carboxyl groups (generally a homo or copolymer of acrylic acid) with a particulate acid-leachable source of polyvalent metal ions (such as an acid-leachable glass) in the presence of water and strontium fluoride.

대표청구항 ▼

A substantially optically translucent dental restorative material comprising a polymerized matrix containing an acid or an alkali-leachable source of polyvalent metal ions, said matrix consisting essentially of a homopolymer or copolymer of acrylic acid having a molecular weight of 20,000 to 125,000

A substantially optically translucent dental restorative material comprising a polymerized matrix containing an acid or an alkali-leachable source of polyvalent metal ions, said matrix consisting essentially of a homopolymer or copolymer of acrylic acid having a molecular weight of 20,000 to 125,000 and said leachable source consisting essentially of by weight about 15-33% SrF2, not more than 25% CaO, 28-38% Al2O3, 25-30% SiO2, 0-9% P2O5, the ratio of said homopolymer to said leachable source being between 0.15 to 1 and 0.5 to 1 whereby the strontium fluoride provides essentially all of the radiopaque properties.