Provided are methods for preparing iron nanoparticles and to iron nanoparticles produced by those methods. The invention also provides methods for coating the iron nanoparticles with oxides and functionalizing the iron nanoparticles with organic and polymeric ligands. Additionally, the invention provides methods of using such iron nanoparticles.

The present invention relates to an aqueous dental composition having a pH of at most 7. Furthermore, the present invention relates to the use of a specific composition for the preparation of an aqueous dental composition.

The present invention relates to an aqueous dental composition having a pH of at most 7. Furthermore, the present invention relates to the use of a specific composition for the preparation of an aqueous dental composition.

The present invention relates to an aqueous dental composition having a pH of at most 7. Furthermore, the present invention relates to the use of a specific composition for the preparation of an aqueous dental composition.

The present invention relates to an aqueous dental composition having a pH of at most 7. Furthermore, the present invention relates to the use of a specific composition for the preparation of an aqueous dental composition.

The present invention relates to a method of fabricating an improved lithium silicate glass ceramic and to that material for the manufacture of blocks for dental appliances using a CAD/CAM process and hot pressing system. The lithium silicate material has a chemical composition that is different from those reported in the prior art with 1 to 10% of germanium dioxide in final composition. The softening points are close to the crystallization final temperature of 800° C. indicating that the samples will support the temperature process without shape deformation.

The present invention relates to a method of fabricating an improved lithium silicate glass ceramic and to that material for the manufacture of blocks for dental appliances using a CAD/CAM process and hot pressing system. The lithium silicate material has a chemical composition that is different from those reported in the prior art with 1 to 10% of germanium dioxide in final composition. The softening points are close to the crystallization final temperature of 800° C. indicating that the samples will support the temperature process without shape deformation.

The invention relates to a radiation-curable radiopaque dental composition comprising a resin matrix comprising cross-linkable component(s) as Component A, ethylenically unsaturated component(s) with acidic moiety as Component B, an initiator system comprising photoinitiator(s) as Component C, reducing agent(s) as Component D, Component A containing at least two (meth)acrylate moieties and a brominated aromatic moiety selected from brominated resorcinol, catechol, tyrosol, benzoic acid, or phenol moieties. The composition can be used for producing an x-ray visible dental adhesive composition, restoration primer or dental sealant.

The invention relates to a radiation-curable radiopaque dental composition comprising a resin matrix comprising cross-linkable component(s) as Component A, ethylenically unsaturated component(s) with acidic moiety as Component B, an initiator system comprising photoinitiator(s) as Component C, reducing agent(s) as Component D, Component A containing at least two (meth)acrylate moieties and a brominated aromatic moiety selected from brominated resorcinol, catechol, tyrosol, benzoic acid, or phenol moieties. The composition can be used for producing an x-ray visible dental adhesive composition, restoration primer or dental sealant.

The present invention relates to a dental composition comprising (i) an acidic polymerizable compound of the following formula (Ia), (Ib) or (Ic):

##STR00001##

wherein X, Y, Y, Z, L, R.sup.2, R.sup.3 and R.sup.4 are as defined in claim 1; and (ii) an initiator system. Furthermore, the present invention relates to the use of the polymerizable compound of formula (I) for the preparation of a dental composition.