The invention concerns an apparatus for a denture preparation assembly, comprising an impression tray piece for insertion into the mouth of the patient and to receive impression material and a dental model jig attachable to the impression tray piece, said dental model jig including model teeth, wherein the attachment between the impression tray piece and the dental model jig is adjustable to allow the dental model jig to be moved in the mouth of the patient to a desired position relative to the impression tray piece, said relative position being retainable to allow scanning of the impression material and the dental model jig.

The invention assists in 3D scanning for digital design/manufacture of dentures, and allows the model teeth to be positioned and orientated in the patient's mouth relative to the impression material in the impression tray piece in the patient's mouth, the position and orientation being retained when the apparatus is removed.

The invention concerns an apparatus for a denture preparation assembly, comprising an impression tray piece for insertion into the mouth of the patient and to receive impression material and a dental model jig attachable to the impression tray piece, said dental model jig including model teeth, wherein the attachment between the impression tray piece and the dental model jig is adjustable to allow the dental model jig to be moved in the mouth of the patient to a desired position relative to the impression tray piece, said relative position being retainable to allow scanning of the impression material and the dental model jig.

The invention assists in 3D scanning for digital design/manufacture of dentures, and allows the model teeth to be positioned and orientated in the patient's mouth relative to the impression material in the impression tray piece in the patient's mouth, the position and orientation being retained when the apparatus is removed.

The present disclosure relates to a dental cutting zirconia blank having high relative density for preparing a dental restoration. More specifically, the present disclosure relates to a dental cutting zirconia blank which consists of a zirconia ceramics used for the cutting with the CAD/CAM system in the dental field, a semi-sinter zirconia blank (pre-sintered body) of which has high relative density, and which can provide a prosthesis device having high aesthetics after sintering. There is provided a dental cutting zirconia blank wherein the dental cutting zirconia blank has at least one layer consisting of zirconia powder containing 4 to 15 mol % of yttria or erbium oxide as a stabilizer, a relationship among pre-sintering density, final-sintering density and relative density satisfies the following relation:

54≤Relative density (%)={(Pre-sintering density)/(Perfect-sintering density)}×100≤70

A dental prosthesis fabrication system includes: an intraoral information obtaining unit that obtains three-dimensional shape information of a tooth and color information of the tooth; a data generation unit that generates three-dimensional shape data and color data of the tooth based on the three-dimensional shape information of the tooth; a forming unit that forms a dental prosthesis based on the three-dimensional shape data of the tooth; and a coloring unit that applies color to a surface of the dental prosthesis based on the color data of the tooth.

A dental prosthesis fabrication system includes: an intraoral information obtaining unit that obtains three-dimensional shape information of a tooth and color information of the tooth; a data generation unit that generates three-dimensional shape data and color data of the tooth based on the three-dimensional shape information of the tooth; a forming unit that forms a dental prosthesis based on the three-dimensional shape data of the tooth; and a coloring unit that applies color to a surface of the dental prosthesis based on the color data of the tooth.

A method is provided for providing a set of ingredients for manufacturing of a dental prosthesis covering. The method comprises receiving a background colour value providing information on a colour of a background substrate on which the prosthesis is to be provided, receiving an appearance colour value providing information on an appearance colour of the prosthesis and receiving a thickness value providing information on a thickness of the dental prosthesis covering. In an electronic memory, a first ingredient record is looked up comprising first ingredient value, based on the measured background value and the measured appearance colour value. The first ingredient values are adjusted in an electronic processor adjusted based on the thickness value and through electronic output means, the adjusted ingredient data is provided. By adjusting ingredients for thickness, a more natural appearance may be achieved.

Disclosed in a method, a user interface and a system for use in determining shade of a patient's tooth, wherein a digital 3D representation including shape data and texture data for the tooth is obtained. A tooth shade value for at least one point on the tooth is determined based on the texture data of the corresponding point of the digital 3D representation and on known texture values of one or more reference tooth shade values.

Polymeric shells which fit over one or more natural teeth to change the perceived color of the teeth, and optionally to provide orthodontic support. The shells can be prepared by thermoforming selected polymeric sheets which contain optical additives over a physical image of the teeth, or by depositing polymeric compositions containing optical additives over a physical image of the teeth, or by additive manufacturing based upon a digital image of the teeth. The optical additives cause the combination of the shell and the teeth to have a desired appearance. At least part of the shell preferably has transparency greater than 75%, particularly greater than 85%.

Provided are a matte reinforced zirconia abutment and a method for manufacturing the same wherein zirconia powder corresponding to the standard colors of a shade guide is used to provide the abutment with a quality similar to a natural tooth, while solving the problem a titanium abutment has had, that is, the difficulties in digital scanning because light is reflected by the gloss of the titanium abutment, and the whole machining method of the abutment is improved to greatly upgrade the durability of the abutment, and the method includes: a main material preparation step; a main material coloring step; a molded body producing step; a primary heat treatment step; a secondary heat treatment step; and a coupling hole formation step.

A dental implant, and a manufacturing method for the same. The dental implant includes a form in which, in order to increase the strength of the connection between a metallic abutment and a dental prosthesis, the abutment and the prosthesis are integrally connected, wherein the prosthesis and the abutment are integrally connected to each other by means of a forming method.