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.

A dental implant system having a first implant part, provided for introduction into a jawbone, and having a second implant part, provided for attaching a tooth replacement part, the implant parts being mechanically interconnectable via a connection pin which is integrally formed on one of the implant parts and which is insertable into a receiving duct provided in the other implant part, is to have a particularly high stability and long duration of use, even when ceramic materials are used for the implant parts. For this purpose, in a contact region to the receiving duct the connection pin is provided with a spacer formed of a material softer than the material of the connection pin, and the connection pin has a porous surface, in the surface region which is provided with the coating, to form a material fit connection to the coating.

A dental cooling device is provided, comprising a muffle (12) and a medium (30) as cooling source. The medium (30), in particular a liquid medium (30), is stored at least in the outer region of the muffle (12) and has an evaporation temperature higher than the room temperature. The quantity of medium (30) is calculated in advance such that the enthalpy of evaporation of the medium is substantially destroyed or consumed when cooling the muffle (12) to the evaporation temperature.

A biocompatible metal implant is provided with a treated surface subject to abrasive mechanical treatment, acid treatment, and sodium treatment, where the biocampatible metal implant treated surface has a macroporosity in the form of cells having dimensions of the order of 50 μm to 250 μm, the cells having pores of from 1 μm to 50 μm, and pores with a size of less than a micrometer, homogeneously over the whole of the treated surface, the treated surface having a surface roughness Ra of greater than or equal to 1.90 μm.

An implant for implantation into bone tissue includes an elongated body having an outer surface. The outer surface has at least one thread. The thread makes a number of turns around the body of the implant and includes a root, a flank and a crest. The root and a segment of the flank have a roughened portion compared to the crest. A method of forming an implant having a threaded outer surface including a root, a flank, and a crest includes treating the threaded outer surface at only the root and a portion of the flank while the crest remains untreated.

The present invention provides a denture block capable of integrally and simply manufacturing a denture by using a CAD/CAM system. A denture is manufactured by cutting using a CAD/CAM system in a state in which the ridge portion 1b is gripped, has: an upper part which is a white part 2 to correspond to a tooth part of the denture; and a lower part which is a gingival color part 3 to correspond to a denture plate of the denture, wherein the white part 2 and the gingival color part 3 are integrally formed by being brought into close contact with each other with no gaps therebetween including the inside thereof, and a plurality of convex portions 4 and concave portions 5 are formed on an upper surface 3a which is the boundary surface of the gingival color part 3 with the white part 2.

The invention relates to a method for surface treatment of a biocompatible metal material, such as an implant, which comprises the following consecutive steps: i) abrasive mechanical treatment of the surface of said material using abrasive calcium phosphate grains, such as a mixture of hydroxyapatite and tricalcium phosphate; ii) acid treatment by hot dipping of said material in a bath comprising sulphuric acid and hydrochloric acid, followed by at least one rinse with demineralised water; iii) sodic treatment by hot dipping of said material in a soda bath followed by at least one rinse with demineralised water and drying in hot air. The implant thus treated has a surface with increased roughness with a triple level of porosity (macro-, micro- and nano-porosity) as well as improved hydrophilic properties. The method can be used for implants made of titanium alloys, such as the TA6V ELI alloy.

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 dental divestment method in which dental restoration parts are divested from a cured muffle by sandblasting. In the production of the muffle molded part or moldings (20) or protrusions (58) are realized in or at the casting mold by means of a casting compound (21), said molded part or moldings or protrusions consisting of a burn-out material. They are removed after curing. The indentations produced in this way are configured as predetermined breaking points for the muffle.

A dental cooling device is provided, comprising a muffle (12) and a medium (30) as cooling source. The medium (30), in particular a liquid medium (30), is stored at least in the outer region of the muffle (12) and has an evaporation temperature higher than the room temperature. The quantity of medium (30) is calculated in advance such that the enthalpy of evaporation of the medium is substantially destroyed or consumed when cooling the muffle (12) to the evaporation temperature.