An oral appliance (OA) made as add-on optional feature in a denture of a user with or without implants to facilitate adjustable mandibular advancement assisting in partially or fully reducing snoring and thus ameliorating obstructive sleep apnea (OSA). The mandibular advancement is realized by deployment of pins in the denture set, and a set of straps that may have optional features such as recess, reinforcement, and the OA may be made of bio-compatible materials using several manufacturing approaches including 3D printing, molding, or milling. An optional additional process comprises of economical production of a similar or alternatively simpler, lighter secondary unit that may be offered to a patient ordering a primary denture, at a discounted price that may serve the purpose of cosmetic function as well as anti-snoring function.

A device for powder based additive material manufacturing of dental appliances. The device has a recoater (10) for providing a powder layer to a build area. The recoater (10) has a slide (11) and is adapted for dispensing of the powder to the build area. The recoater (10) has further at least two powder supplies for individually supplying a first and a second powder on the slide (11) and a powder transport section in which the first and second powder are brought in touch with each other for at least partially merging. The invention is advantageous in that it allows providing dental blanks having color gradients in all three dimensions.

The invention shows a dental press furnace comprising a pressing punch (36) which acts on a green product (32) made of in particular a ceramic masspossibly by means of an interposed ram (28), the green product (32) being guided in a press channel (30) which is configured in a muffle (24), and a pressure, distance and/or speed sensor detecting at least one motion parameter of the pressing punch (36), and comprising a control device for controlling the pressing process based on the output signal of the sensor, the trigger criterion for the start of the pressing process being a change of at least one motion parameter of the pressing punch upon heating and/or softening of the green product which change is detected by means of the sensor.

The invention relates to a method for producing a plastics body with patterned layers for producing dental prostheses having the steps: method for production, wherein the method is characterized by the following steps: A) providing a first and a second PMMA-based compound which are uncured and have different colorations; B) heating of a first patterned pressing surface to between 90? C. and 150? C.; C) pressing of the first PMMA-based compound with the heated first pressing surface, such that a patterned surface of the first PMMA-based compound is obtained; D) detachment of the first pressing surface; E) heating of the first or of a second patterned pressing surface to between 90? C. and 150? C.; F) pressing of the second PMMA-based compound with the heated pressing surface, such that a patterned surface of the second PMMA-based compound is obtained; G) detachment of the pressing surface; H) subsequent laying of the patterned first and second PMMA-based compounds on one another such that the patterned surface of the second PMMA-based compound is oriented toward the patterned surface of the first PMMA-based compound; and I) compression molding of the first with the second patterned PMMA-based compound, such that a solid bond is created between the first PMMA-based compound and the second PMMA-based compound.

The invention also relates to a device for implementing such a method.

Quartz solid solution glass ceramics and precursors thereof are described, which are characterized by very good mechanical and optical properties and can be used in particular as restorative materials in dentistry.

A method of use of an oral appliance (OA) made as add-on optional feature in a denture of a user with or without implants to facilitate adjustable mandibular advancement assisting in partially or fully reducing snoring and thus ameliorating obstructive sleep apnea (OSA). Steps of the method of use include obtaining intra-oral information necessary and adequate for manufacture of a primary denture set for chewing purposes and using the same information for manufacture of a simpler, lighter secondary denture set that may be offered to a patient ordering a primary denture set, at a discounted price that may serve the purpose of cosmetic function or anti-snoring function or both.

A device for powder based additive material manufacturing of dental appliances. The device has a recoater (10) for providing a powder layer to a build area. The recoater (10) has a slide (11) and is adapted for dispensing of the powder to the build area. The recoater (10) has further at least two powder supplies for individually supplying a first and a second powder on the slide (11) and a powder transport section in which the first and second powder are brought in touch with each other for at least partially merging. The invention is advantageous in that it allows providing dental blanks having color gradients in all three dimensions.

Dental crowns and methods of making the same. The dental crown may include a metal shell shaped to cover a portion of a tooth of a patient; a coating retention metal layer diffusion bonded to the metal shell, wherein an interface between the coating retention layer and the metal shell comprises a plurality of interstitial regions; and a composition on the coating retention layer and within the plurality of the interstitial regions to bond the coating composition to the metal shell.