Radiopaque dental materials with nano-sized particles
Assignee3M Innovative Properties Company
InventorsXiaodong Zhang, Brant Ulrick Kolb, Douglas Alan Hanggi, Sumita Basu Mitra, Paula D'Nell Ario, Richard Paul Rusin
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Abstract
A dental material comprising a hardenable resin, a non-heavy metal oxide particle and a heavy metal oxide. The dental materials can be radiopaque, strong, translucent, or resistant to toothbrush abrasion, or combinations thereof.
Claims58
A dental material comprising non-heavy metal oxide particles having an average diameter of less than about 300 nm, an acid modified heavy metal oxide, and a hardenablc resin.
A dental material comprising silica particles having an average diameter of less than about 300 nm, an acid modified heavy metal oxide, and a hardenable resin.
A method of making a dental material comprising:
- a) admixing a surface modifier with silica particles having an average diameter of less than about 300 nm;
- b) admixing an acid surface modifier with heavy metal oxide particles having an average diameter less than about 100 nm;
- and
- c) admixing said surface modified silica particles and acid modified heavy metal oxide particles with a hardenable resin.
A dental material comprising non-heavy metal oxide particles having an average diameter of less than about 100 nm, acid modified heavy metal oxide particles having an average diameter of less than about 100 nm, and a hardenable resin.
A method of using a dental material comprising:
- placing the material near or on a tooth surface;
- changing the topography of the material;
- and
- hardening the material,
- wherein the dental material comprises non-heavy metal oxide particles having an average diameter of less than about 300 nm;
- surface treated heavy metal oxide particles;
- and a hardenable resin;
- and wherein the surface treatment provides heavy metal oxide particles that are stabilized to provide for dispersion in the hardenable resin.
A method of using a dental material comprising:
- placing the material near or on a tooth surface;
- changing the topography of the material;
- and
- hardening the material,
- wherein the dental material comprises non-heavy metal oxide, heavy metal oxide, and a hardenable resin;
- the heavy metal of the heavy metal oxide has an atomic number greater than 30 but less than 72;
- and each of the non-heavy metal oxides and heavy metal oxides present are particles having an average diameter of less than about 100 nm.
Dependencies are inferred from the claim text.