The invention discloses a process for producing dental shaped parts which consists entirely of porous glass without crystalline portions. The density of the blank is between 50% and 95% of its theoretical density. It has a discoidal shape with a diameter of at least 20 mm.

The blank is produced by a process in which glass powder is first pressed at a pressure of between 10 MPa and 300 MPa and this green body is (pre-)sintered at a temperature of between 580° C. and 750° C. to form a blank of porous glass without crystalline portions.

From the obtained blank, monolithic dental shaped parts can be obtained by mechanical processing followed by sintering, wherein a process according to the invention for stabilizing the shape of the shaped parts is used.

The present invention provides compositions of bioactive dental materials that form a mineral apatite bond between the dental material and tooth structure for increasing bond strength and longevity. Also disclosed are methods for using said compositions in treating teeth.

Described is a milling blank for producing an indirect dental restoration, composed of resin or a resin-based composite, containing water in an amount of at least 25% of the water sorption W.sub.sp. Described is further a method for producing such a milling blank or a moulded part produced therefrom for use as an indirect dental restoration, a use of the water sorption method, a kit for producing indirect dental restorations and a method for indirect dental restoration.

Described is a milling blank for producing an indirect dental restoration, composed of resin or a resin-based composite, containing water in an amount of at least 25% of the water sorption W.sub.sp. Described is further a method for producing such a milling blank or a moulded part produced therefrom for use as an indirect dental restoration, a use of the water sorption method, a kit for producing indirect dental restorations and a method for indirect dental restoration.

Dental prosthesis having a structure similar to that of natural teeth and a method for manufacturing the same. Provided is a dental prosthesis capable of expressing a structure and properties similar to natural teeth in which enamel is a surface layer and dentine is an inner layer underneath the enamel. In addition, a method of manufacturing the same dental prosthesis through three-dimensional printing is provided. The dental prosthesis is a cured product including ceramic particles dispersed in a polymer matrix. The cured product includes a first cured product layer including 70% to 90% by weight of ceramic particles having an average particle diameter of 100 to 1,000 nm and a second cured product layer including 40% to 60% by weight of ceramic particles having an average particle diameter of 10 μm to 500 μm, the second cured product layer being adjacent to the inner surface of the first cured product layer.

Dental prosthesis having a structure similar to that of natural teeth and a method for manufacturing the same. Provided is a dental prosthesis capable of expressing a structure and properties similar to natural teeth in which enamel is a surface layer and dentine is an inner layer underneath the enamel. In addition, a method of manufacturing the same dental prosthesis through three-dimensional printing is provided. The dental prosthesis is a cured product including ceramic particles dispersed in a polymer matrix. The cured product includes a first cured product layer including 70% to 90% by weight of ceramic particles having an average particle diameter of 100 to 1,000 nm and a second cured product layer including 40% to 60% by weight of ceramic particles having an average particle diameter of 10 μm to 500 μm, the second cured product layer being adjacent to the inner surface of the first cured product layer.

Provided is a dental bulk block comprising a crystalline phase includes lithium disilicate as a main crystalline phase and eucryptite as a sub-crystalline phase in an amorphous glass matrix that is a functionally graded material having a main crystalline size gradient with respect to the depth thereof, and having no interface at the point of change in the main crystalline size gradient value, and is useful for manufacturing artificial teeth having structural characteristics similar to those of natural teeth, is facile to machine into an artificial tooth prosthesis due to the inclusion of eucryptite as the sub-crystalline phase compared to when only lithium disilicate exists, and can not only shorten the manufacturing time, but also increase the structural stability in terms of force distribution through functional grading of mechanical properties.

The present invention relates to a composition for a single-paste type hydraulic endodontic filling material comprising dimethyl sulfoxide (DMSO). According to one aspect of the invention, there is provided a single-paste type hydraulic endodontic filling composition, comprising a calcium silicate component and DMSO.

ZrO.sub.2-toughened glass ceramics having high molar fractions of tetragonal ZrO.sub.2 and fracture toughness value of greater than 1.8 MPa.Math.m.sup.1/2. The glass ceramic may also include also contain other secondary phases, including lithium silicates, that may be beneficial for toughening or for strengthening through an ion exchange process. Additional second phases may also decrease the coefficient of thermal expansion of the glass ceramic. A method of making such glass ceramics is also provided.

ZrO.sub.2-toughened glass ceramics having high molar fractions of tetragonal ZrO.sub.2 and fracture toughness value of greater than 1.8 MPa.Math.m.sup.1/2. The glass ceramic may also include also contain other secondary phases, including lithium silicates, that may be beneficial for toughening or for strengthening through an ion exchange process. Additional second phases may also decrease the coefficient of thermal expansion of the glass ceramic. A method of making such glass ceramics is also provided.