Abstract:
Preparation of a dental prosthesis that includes a gingiva part having retention holes for seating of manufactured teeth, with the retention holes being enlarged relative to the manufactured teeth. Wax in the enlarged retention holes permits adjustments in positioning of the manufactured teeth, and a helper structure preserves this positioning when the wax is removed and a curable gingiva material is filled into the retention holes. Aspects described herein include digital and/or automatic design of the dental prosthesis and its constituent pieces, as well as automated fabrication thereof in whole or in part, such as in a dental CAD/CAM system.
Abstract:
The invention relates to a method for creating a virtual dental image from a 3D volume (1) comprising volumetric image data. Firstly, a sub-volume (8, 12, 15, 18) of the 3D volume (1) is defined and then a virtual projection image (30, 41) is generated for said sub-volume (8, 12, 15, 18) from a specific X-ray imaging direction (11) by computation of the volumetric image data in said X-ray imaging direction (11).
Abstract:
The invention relates to a laser handpiece 1, an exchangeable fiber-optic insert 10, and a control unit 70 therefor. The laser handpiece 1 comprises a optical waveguide 35, which is connected to a light coupling site in a base member 21 and in which the application element 10 for laser light is exchangeably attached to the base member 21. The base member 21 is mounted in a sleeve-type grip 3 for axial displacement therein. The light guide 10 can be wound around a control device 70 which has an annular gap 73 for this purpose and a lower housing part 75 which is offset from an upper housing part 74. An exchangeable fiber-optic insert 10, 27 acting as an application element is provided with a sleeve 80 serving as protection during transportation and as an assembling tool.
Abstract:
Preparation of a dental prosthesis that includes a gingiva part having retention holes for seating of manufactured teeth, with the retention holes being enlarged relative to the manufactured teeth. Wax in the enlarged retention holes permits adjustments in positioning of the manufactured teeth, and a helper structure preserves this positioning when the wax is removed and a curable gingiva material is filled into the retention holes. Aspects described herein include digital and/or automatic design of the dental prosthesis and its constituent pieces, as well as automated fabrication thereof in whole or in part, such as in a dental CAD/CAM system.
Abstract:
The invention relates to a method for producing an x-ray image (1) of an object (2) by means of an x-ray device (3). An x-ray source (4) and an x-ray detector (5) are moved about an object (2) during an at least partial circulation (8, 9), and the x-ray beams (10) which are generated by the x-ray source (4) and pass through the object (2) are detected from multiple different directions by means of the x-ray detector (5). In the process, at least one optical camera (13, 14) captures the object (2) during the circulation, wherein an optical image (15, 17) is produced. The optical camera (13, 14) has a rigidly defined position relative to the x-ray source (4) and/or the x-ray detector (5). The optical image (15, 17) is then used to determine a movement trajectory of the object (2) relative to the x-ray source (4) and/or the x-ray detector (5).
Abstract:
The invention relates to a sintering furnace for components consisting of sintering material, especially dental components and in particular components consisting of ceramic, and a method for sintering such components. The sintering furnace 1 comprises a heatable furnace chamber 2 for the component 9 to be sintered, the furnace chamber 2 having a wall section 6 to be opened for inserting the component 9 to be sintered into the furnace chamber 2. Drive means 10 are provided for mechanized opening and closing of the wall section 6, and a control 11 is provided for the drive means 10 that has an actuation element 12 for the drive means 10. Furthermore, a heating device 5 for the furnace chamber 2 is provided, and the control 11 causes the furnace chamber 2 to be heated. Actuating the control element 12 triggers the loading sequence of the control 11, and the drive means 10 are automatically actuated by the control 11 corresponding to the loading sequence. An additional subject is a method for operating the sintering furnace, as well as a computer program therefor.
Abstract:
The invention relates to a method for measuring a dental object (1) using a dental camera (2). During measurement, several optical three-dimensional images (3, 50, 51) of the object (1) are produced. During measurement, an acoustic sound (10, 12) is generated by means of a sound producer (9, 11), said sound (10, 12) being used as feedback for the user and information relating to the current status of a recording of the images (3, 50, 51) and/or relating to image requirements of the dental camera (2) are transmitted to the user. Then, each individual image (3, 50, 51) it is automatically checked by a computer (6) as to whether an overlapping area (7, 8) between the images (3, 50, 51) which are to be combined meets the defined recording requirements for a correct recording.
Abstract:
The invention relates to a data base for the storage of data, which comprises dental data relating to real teeth in the form of digitized images, which digitized images involve universally applicable dentition-specific and/or universally applicable tooth-specific features or structural properties, such as sex-specific and/or tooth family-specific and/or biography-specific and/or person-specific characteristics, with or without anomalous characteristics. It also relates to a tooth model, whose outer and inner surfaces and/or internal structure are specified by means of data from a data base and are displayed on an output device, and, in particular, the data used for this purpose are taken from a data base and are suitably adapted. The invention also relates to a method of conceiving a tooth model whose external shape and/or internal structure are designed and/or constructed by means of data which represent sex-specific and/or race-specific and/or biography-specific and/or person-specific characteristics, with or without anomalous characteristics, wherein the user and/or the client, with the aid of an electronic data processing system, accesses data base(s), combines these data on display means to form an image of a tooth model, and, with the aid of said image of a tooth model, produces the tooth model, whose shape can be processed with the aid of the input and output devices of the electronic data processing system.
Abstract:
In a method of imaging an object, for dental purposes, comprises: a) projecting a striped pattern on to the object to be imaged, b) recording the projected striped pattern as a basic image (Ri) with a camera, steps a) and b) being carried out at a number of different positions of the phase relationship of the striped pattern, and c) computing an image of the object from the plurality of mutually out-of-phrase basic camera images. Provision is made for suppression of periodic disturbances in that, in step c), c1) at least two groups of basic images (R1, R2, . . . , Rn; R2, R3, . . . , Rnnull1) are formed from the basic camera images (R1, . . . , Rm), c2) a phase related image (Pj) of the object to be imaged (20) is computed from each group of basic images (R1, R2, . . . , Rn; R2, R3, . . . , Rnnull1), c3) the computed phase related images (P1, P2) are averaged such that a phase related image (P) having a reduced amount of noise is formed, and that c4) an image of the object is computed from the phase related image (P) having a reduced amount of noise.
Abstract:
A 3D printer comprising a resin vat, a component carrier, a transport box for depositing the component carrier, a transport device for removing the component carrier from the transport box and transporting it into the resin vat, and for moving the component carrier downward and upward in the resin vat The transport device has translatory axes in the vertical and horizontal directions, each of which can be driven independently by a motor, the transport device having a locking device that detachably connects the component carrier. The locking device, during the downward movement along the vertical translatory axis, reaches a specific position (P) by the drive of the respective motor, at which a stop located on the vertical translatory axis sets a coupling element in motion. A spring-loaded locking pin arranged in contact with the coupling element is immersed in a bayonet opening of the component carrier by the movement. The immersed locking pin can be brought into a locking position in the bayonet opening via the horizontal translatory axis.