A device for positioning and stabilizing individual teeth during laboratory research for cutting or crown removal. The device includes an adjustable bar having a first side wall and a second side wall located opposite the first side wall. An adjustment mechanism is located on the second side wall. The adjustment mechanism is adjustable in a direction perpendicular to the first side wall. A plate is located between the first side wall and the second side wall. A height adjusting screw is located at the bottom of the adjustable bar moving the plate in a vertical direction adjusting the height of the plate. A first tilt screw is located at an opposite end of the adjustable bar as a second tilt screw allowing for rotation of the adjustable bar around the first and second tilt screws.

A device for positioning and stabilizing individual teeth during laboratory research for cutting or crown removal. The device includes an adjustable bar having a first side wall and a second side wall located opposite the first side wall. An adjustment mechanism is located on the second side wall. The adjustment mechanism is adjustable in a direction perpendicular to the first side wall. A plate is located between the first side wall and the second side wall. A height adjusting screw is located at the bottom of the adjustable bar moving the plate in a vertical direction adjusting the height of the plate. A first tilt screw is located at an opposite end of the adjustable bar as a second tilt screw allowing for rotation of the adjustable bar around the first and second tilt screws.

An artificial tooth 30 to be polished is fixed at a tooth neck 32 side and rotated about a tooth axis 33. Abrasives, preferably elastic abrasives formed by kneading abrasive grains into or supporting abrasive grains on an elastic material, are ejected together with a compressed gas at an ejection pressure of from 0.1 MPa to 0.5 MPa onto an occlusal portion 31 side of the artificial tooth 30 while the artificial tooth 30 is being rotated. The abrasives are ejected at an inclination angle with respect to the tooth axis 33 of the artificial tooth 30 of from 0 to 90, and preferably from 15 to 75. Portions on the occlusal portion 31 and side surfaces 38 of the artificial tooth 30 are thereby polished at the same time by the abrasive sliding over these portions.

An arrangement (1) including at least one workpiece (2) for sintering, more particularly a dental workpiece, and having at least one support material (3), and including a sintering apparatus (4) for sintering the workpiece (2), wherein the sintering apparatus (4) has at least one gas inlet duct (5) for protective gas and at least one base surface (6), and the workpiece (2) lies on the base surface (6) on the support material (3) and protrudes at least partially beyond the support material (3), wherein the protective gas can be supplied to the workpiece (2) preferably exclusively through the support material (3).

An arrangement (1) including at least one workpiece (2) for sintering, more particularly a dental workpiece, and having at least one support material (3), and including a sintering apparatus (4) for sintering the workpiece (2), wherein the sintering apparatus (4) has at least one gas inlet duct (5) for protective gas and at least one base surface (6), and the workpiece (2) lies on the base surface (6) on the support material (3) and protrudes at least partially beyond the support material (3), wherein the protective gas can be supplied to the workpiece (2) preferably exclusively through the support material (3).

A processing target mold is usable to form, by molding, a processing target to be shaved by a shaving device. The processing target includes a hold portion held by the shaving device, a target portion to be formed into a post-shaving item, and a coupling portion coupling the hold portion with the target portion. A main body of the processing target mold includes a bottom member, an outer frame member extending upward from the bottom member, and a protruding member extending upward from a portion of the bottom member that is enclosed by the outer frame member as seen in a plan view. The main body includes an injection space enclosed by the bottom member and the outer frame member. A material is injected into the injection space. The injection space includes a hold space, a target space and a coupling space in which the hold portion, the target portion and the coupling portion are respectively formed by molding.

A processing target mold is usable to form, by molding, a processing target to be shaved by a shaving device. The processing target includes a hold portion held by the shaving device, a target portion to be formed into a post-shaving item, and a coupling portion coupling the hold portion with the target portion. A main body of the processing target mold includes a bottom member, an outer frame member extending upward from the bottom member, and a protruding member extending upward from a portion of the bottom member that is enclosed by the outer frame member as seen in a plan view. The main body includes an injection space enclosed by the bottom member and the outer frame member. A material is injected into the injection space. The injection space includes a hold space, a target space and a coupling space in which the hold portion, the target portion and the coupling portion are respectively formed by molding.

A dental prosthesis including a prosthesis base and at least one artificial tooth, and including at least one micro drive for detaching the dental prosthesis from an alveolar crest. The invention further relates to a method for removing such a dental prosthesis from an oral cavity, wherein the dental prosthesis is detached from an alveolar crest in the oral cavity by means of a micro drive and then manually removed from the oral cavity. In order to detach a dental prosthesis adhering to the alveolar crest, the micro drive according to the invention is a micro motor which drives a lifting means which lifts the dental prosthesis from the alveolar crest.

A system for scanning a dental arch of a patient includes a reference element having a reference pattern thereon; a holding mechanism configured to hold the reference element in a fixed position inside the patient's oral cavity adjacent to and spaced from the dental arch, wherein the holding mechanism is configured to be installed on the patient without contacting an occlusal surface of the dental arch; and an intra-oral scanner configured to scan the dental arch and an adjacent portion of the reference element to obtain a scanned image comprising the scanned portion of the dental arch and the scanned adjacent portion of the reference pattern.