A polyaryletherketone resin material is provided for dental use having high color tone stability in the case of exposure to visible light. The polyaryletherketone resin material for dental use includes a polyaryletherketone resin, which is a thermoplastic resin containing at least an aromatic group, an ether group (ether bond), and a ketone group (ketone bond) in its structural unit, and having a b* value of 10.0 or more in terms of colorimetric value of a 1.0 mm molded body in a CIELab color system under a black background condition.

The present invention provides a gypsum-based embedding material composition for casting useful for forming a rapid-heating type gypsum-based embedding material and a method for producing the same. The gypsum-based embedding material is formed of the gypsum-based powdery embedding material composition by adding a malaxation liquid into the composition and heating the mixture in a high-temperature furnace. The gypsum-based embedding material composition contains as main components, at least one co-pulverized material selected from a co-pulverized material of calcined gypsum and quartz, that of calcined gypsum and cristobalite, and that of calcined gypsum, quartz, and cristobalite. The composition further contains a powdery moisture-retaining component or a liquid moisture-retaining component having a low water content, and has an average particle diameter of 30 μm or less.

The present invention provides a gypsum-based embedding material composition for casting useful for forming a rapid-heating type gypsum-based embedding material and a method for producing the same. The gypsum-based embedding material is formed of the gypsum-based powdery embedding material composition by adding a malaxation liquid into the composition and heating the mixture in a high-temperature furnace. The gypsum-based embedding material composition contains as main components, at least one co-pulverized material selected from a co-pulverized material of calcined gypsum and quartz, that of calcined gypsum and cristobalite, and that of calcined gypsum, quartz, and cristobalite. The composition further contains a powdery moisture-retaining component or a liquid moisture-retaining component having a low water content, and has an average particle diameter of 30 μm or less.

The proposed solution solves a problem of designing a machine for producing molded composite parts that are homogeneously structured and the problem of finding a method for producing composite for implants. The essence of the design of the machine consists in that it has a portioning assembly, whereby above a mold form unit (14) there is a guiding unit (11) located opposite a dosing unit (6) and above the aforementioned guiding unit (11) there is a pressing assembly (20) slidingly mounted on a vertical frame (19) and which is equipped with at least one piston rod (25) with a rammer (27) at its end. A preliminary molding is being performed by thoroughly filling a preform trough and then the matter is being pushed out of the preform trough in portions and then each portion is rammed separately until consistency containing less than 15% air is achieved.

The proposed solution solves a problem of designing a machine for producing molded composite parts that are homogeneously structured and the problem of finding a method for producing composite for implants. The essence of the design of the machine consists in that it has a portioning assembly, whereby above a mold form unit (14) there is a guiding unit (11) located opposite a dosing unit (6) and above the aforementioned guiding unit (11) there is a pressing assembly (20) slidingly mounted on a vertical frame (19) and which is equipped with at least one piston rod (25) with a rammer (27) at its end. A preliminary molding is being performed by thoroughly filling a preform trough and then the matter is being pushed out of the preform trough in portions and then each portion is rammed separately until consistency containing less than 15% air is achieved.

A frictionally-retained detachable dental attachment assembly or anchor device is designed to attach a dental appliance with a tooth root or implant. The assembly includes a denture attachment housing for securing in the dental appliance, an abutment attached with a tooth root or implant, and a compressible retention member with a first end in fixed attachment with the cap and a second end in snap engagement with the abutment via a frictionally-retained ball secured within a cavity of the abutment. The retention member is formed using a compressible material to allow the ball to compress and the retention member to flex while inserting the ball into the cavity. Additional friction-retained and fixed attachment configurations of the dental anchor device are provided, along with methods of securing a dental appliance in a subject's mouth by means of the friction-retained and fixed attachment dental anchor devices.

A frictionally-retained detachable dental attachment assembly or anchor device is designed to attach a dental appliance with a tooth root or implant. The assembly includes a denture attachment housing for securing in the dental appliance, an abutment attached with a tooth root or implant, and a compressible retention member with a first end in fixed attachment with the cap and a second end in snap engagement with the abutment via a frictionally-retained ball secured within a cavity of the abutment. The retention member is formed using a compressible material to allow the ball to compress and the retention member to flex while inserting the ball into the cavity. Additional friction-retained and fixed attachment configurations of the dental anchor device are provided, along with methods of securing a dental appliance in a subject's mouth by means of the friction-retained and fixed attachment dental anchor devices.

The invention relates to a method for planning a heat treatment of a dental prosthesis part (1), in which a 3D model (9) of the dental prosthesis part to be produced (1) already exists. A temperature profile (16) for the heat treatment of the dental prosthesis part (1) is automatically determined by a computer (17) as a function of determined geometric parameters (10, 11, 12, 13) of the dental prosthesis part to be produced (1) and/or of determined material parameters of the dental prosthesis part to be produced (1).

The invention relates to a method for planning a heat treatment of a dental prosthesis part (1), in which a 3D model (9) of the dental prosthesis part to be produced (1) already exists. A temperature profile (16) for the heat treatment of the dental prosthesis part (1) is automatically determined by a computer (17) as a function of determined geometric parameters (10, 11, 12, 13) of the dental prosthesis part to be produced (1) and/or of determined material parameters of the dental prosthesis part to be produced (1).

A dental furnace having closed or closeable firing chamber (12), which is surrounded by thermal insulation (20) and which comprises at least one inlet terminal (22) and at least one outlet terminal (24). Via said two terminals, a gas, especially air, may be passed through the firing chamber (12) and/or may be discharged from the firing chamber (12), wherein a vacuum source (44) is provided, which is in direct or indirect communication with the outlet terminal (24) and via which the outlet terminal (24) may be set under vacuum pressure. At the outlet terminal (24), an especially T-shaped or Y-shaped connector (26) is attached. The connector (26) comprises two entrance ports (32, 24) and an exit (40), wherein the exit (40) is in communication with the vacuum source (44) and a first entrance port is in communication with the firing chamber (12), and especially is flange-mounted at the outlet terminal (24) thereof, and a second entrance port (34) is in communication with ambient air.