The present invention relates to a 3D printer (1) comprising a resin vat, a component carrier (2), a transport box (3) for depositing the component carrier (2), a transport device (4) for removing the component carrier (2) from the transport box (3) and transporting it into the resin vat, and for moving the component carrier (2) downward and upward in the resin vat, wherein the transport device (4) has translatory axes (5) in the vertical and horizontal directions, each of which can be driven independently by a motor (6), the transport device (4) having a locking device (7) for detachably connecting the component carrier (2), characterized in that the locking device (7), during the downward movement along the vertical translatory axis (5), reaches a specific position (P) by the drive of the respective motor (6), at which a stop (8) located on the vertical translatory axis (5) sets a coupling element (9) in motion, wherein a spring-loaded locking pin (10) arranged in contact with the coupling element (9) is immersed in a bayonet opening of the component carrier (2) by the movement, wherein the immersed locking pin (10) can be brought into a locking position in the bayonet opening (2a) via the horizontal translatory axis.
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
B29C 64/129 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
B29C 64/379 - Handling of additively manufactured objects, e.g. using robots
2.
X-RAY IMAGING METHOD AND SYSTEM FOR REDUCING OVERLAPPING OF NEIGHBORING TEETH IN PANORAMIC IMAGES
The present invention relates to a computer-implemented x-ray imaging method for generating a panoramic image (1) with reduced overlapping of neighboring teeth (8), comprising: a step of acquiring a plurality of 2D x-ray images (2) respectively at a plurality of different radiographic directions (3) by means of rotating an x-ray source (4) and an x-ray detector (5) around the jaw (6) of a patient; characterized by further comprising: a step of identifying one or more regions (7) each including at least one pair of overlapping neighboring teeth (8) in the 2D x-ray images (2) and/or in temporary panoramic images reconstructed from the 2D x-ray images (2) for which an optimal radiographic directions (3') may be determined, among the corresponding radiographic directions (3), which reduces the overlap in the panoramic image (1) to be reconstructed, and a step of determining one or more optimal radiographic directions (3') respectively among the corresponding radiographic directions (3) of the 2D x-ray images for which one or more regions (7) each including at least one pair of overlapping neighboring teeth (8) has been identified in the identifying step, to reduce the overlaps in the panoramic image (1) to be reconstructed.
A61B 6/14 - Applications or adaptations for dentistry
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
The present invention provides a building plate assembly (1) for use in an additive manufacturing apparatus comprising means for additively manufacturing a component (2) through curing photocurable resin, the building plate assembly (1) comprising: a building plate (3) having a front surface (3a) on which said component (2) can be attached during the additive manufacturing; a plurality of through holes (3b) formed between the rear surface (3c) and the front surface (3a) of the building plate (3); characterized by further comprising: a detachment means (4) having one or more projections (4a) which can be relatively moved towards the rear surface (3c) and into the through-holes (3b) to detach the component (2) from the front surface (3a) and, retracted to at least partly clear the through-holes (3b), wherein the through-holes (3b) and the corresponding projections (4a) are arranged in a two-dimensional array.
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
The present invention relates to a dental machining system for manufacturing a dental restoration, comprising: a dental tool machine (1) which comprises: a dental blank holder for holding one or more dental blanks (2) relatively movable with respect to one or more dental tools (3); one or more driving units (4) each for movably holding at least one dental tool (3) for machining the dental blanks (2); a determination unit for determining the type of each dental blank (2); an adjustment means for allowing the user to adjust the machining time, a level of quality of the dental restoration, and a level of security of the dental restoration and dental tool (3) against machining damage; characterized by further comprising: a control unit which is further adapted to execute a trained artificial intelligence algorithm adapted to generate process parameters for the machining based on the type of the dental blank (2), the machining time, the level of quality of the dental restoration, and the level of security of the dental restoration and dental tool (3) against machining damage, to calculate the temporal trajectory of the dental tool (3) for the machining based on construction data of the dental restoration and the generated process parameters, and to control the dental blank holder and the driving units (4) based on the calculated temporal trajectory.
The present invention relates to a dental machining system for manufacturing a dental restoration/appliance, comprising: a dental tool machine (1) which comprises: a dental blank holder for movably holding at least one dental blank (2) relative to one or more dental tools (3); one or more driving units (4) each for movably holding one or more dental tools (3), a control unit for controlling the dental blank holder and the driving units (4) based on construction data of the dental restoration/appliance and a plurality of machining processes specific for the manufacturing of the dental restoration/ appliance from the dental blank (2); characterized in that the control unit is further adapted to execute a trained artificial intelligence algorithm adapted to predict the machining time for manufacturing the dental restoration/appliance based on input data comprising: process parameters defining the machining processes respectively; and mappings which include information on the target geometry of the dental restoration/appliance, which are constructed based on the said machining processes respectively.
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
The present invention relates to a computer-implemented method for determining the optimum relative position of at least one sensor and/or at least one imaging source of an imaging device for at least one intraoral imaging, and for the non-overlapping imaging of at least two tooth root canals. The present invention also relates to a sensor holder (1) for intraoral imaging comprising at least one biting device (2) that is insertable into the mouth of a patient, at least one holding device (3) at least indirectly engaged with the biting device (2) for fixing at least one sensor, and at least one centering means (4) for aligning at least one imaging device, wherein the centering means (4) is at least indirectly in operative connection with the biting device (2) via at least one centering means holding portion (5), characterized in that the centering means holding portion (5) is so designed that positioning of the holding device (3) with respect to the centering means (4) is continuously variable in angle and/or distance, as well as methods for optimizing and performing intraoral imaging.
A post-exposure unit (1) for post-exposure of a body (2) manufactured by means of an additive manufacturing method from a substance curable by radiation, the post-exposure unit (1) comprising at least one radiation source (7) configured for post-exposure, the post-exposure unit (1) comprising at least one radiation sensor (8), the radiation sensor (8) being configured to capture radiation emitted by the radiation source (7), wherein the post-exposure unit has a receiving space for receiving a body to be post-exposed, wherein the radiation sensor is configured to capture radiation emitted by the radiation source and traversed at least a part of the receiving space at least once.
A system (1) and method for cleaning and/or post-exposure of a body (2) manufactured by means of an additive manufacturing method from a substance curable by radiation, the system (1) comprising a cleaning tank (13) for cleaning the body (2) and/or an exposure chamber for post-exposure of the body (2), the system (1) further comprising a transport device (4) having a drive (17) for moving a build platform (3) relative to the cleaning tank (13) and/or to the exposure chamber, the transport device (4) comprises a force sensor (18), the force sensor (18) being configured to capture a force acting on the build platform (3) and provide a force signal, and being connected to a processing unit (19) for controlling the drive (17) and/or for outputting process parameters based on the force signal; and, as part of the method, the body (2) on a build platform (3) being moved relative to the cleaning tank (13) and/or to the exposure chamber by a transport device (4) comprising a drive (17), and during and/or after the cleaning and/or post-exposure, a force acting on the build platform (3) being captured using a force sensor (18) providing a force signal and a processing unit (19) connected to the force sensor (18) controlling the drive (17) and/or outputting a process parameter on the basis of the force signal.
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing
B08B 3/10 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
B29C 71/00 - After-treatment of articles without altering their shape; Apparatus therefor
9.
DENTAL MACHINING SYSTEM FOR PREDICTING THE WEAR CONDITION OF A DENTAL TOOL
The present invention relates to a dental machining system for manufacturing a dental restoration comprising: a dental tool machine (1) which comprises: a dental blank holder for holding at least one dental blank (2) relatively movably with respect to one or more dental tools (3); one or more driving units (4) each for movably holding at least one dental tool (3) for machining the dental blank (2), a control unit for controlling the dental blank holder and the driving units (4) based at least on a temporal trajectory of the dental tool (3) relative to the dental blank (2) and a spatial amount of material removal from the dental blank (2) along the temporal trajectory; characterized in that the control unit is further adapted to execute a primary trained artificial intelligence algorithm adapted to predict dynamical quantities based on the temporal trajectory and, the spatial amount of material removal, wherein the dynamical quantities correspond to one or more physically measurable quantities which relate to the respective dental tool (3) along the temporal trajectory; a secondary trained artificial intelligence algorithm adapted to predict the wear condition of the dental tool (3) based on the predicted dynamical quantities.
B23Q 17/09 - Arrangements for indicating or measuring on machine tools for indicating or measuring cutting pressure or cutting-tool condition, e.g. cutting ability, load on tool
G05B 19/4065 - Monitoring tool breakage, life or condition
10.
METHOD OF IDENTIFYING DENTAL CONSUMABLES EQUIPPED INTO A DENTAL TOOL MACHINE
The present invention relates to a method of identifying dental consumables including at least one of a dental blank (2) and a dental tool (3) equipped into a dental tool machine (1), the method comprising: a step of colliding the dental tool (3) with the dental blank (2) or a dental blank holder of the dental tool machine (1); a step of detecting a signal indicative of the collision, characterized by further comprising: a step of analyzing the detected signal through trained artificial intelligence; and a step of identifying the type and/or condition of at least one of the dental consumables based on the analysis.
G05B 19/401 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
11.
METHOD OF MACHINING A DENTAL BLOCK FOR MANUFACTURING A DENTAL RESTORATION
The present invention relates to a method of machining a dental block (2) by using at least one dental tool (4) to finish or pre-finish a dental restoration (5) at least completely along the equator (5a) with or without a holding stub (5b), the method characterized by comprising: a step of moving the axis (4a) of the dental tool (4) along a path (6) with an overlaid lateral motion having an amplitude (A), and without separating an unmachined piece (2´) from the rest of the dental block (2), wherein the path (6) lies away from the equator (5a) at least by an amount equal to half of the diameter of the dental tool (4) plus half of the amplitude (A) of the overlaid lateral motion.
B23C 3/16 - Working surfaces curved in two directions
B23Q 3/16 - Devices holding, supporting, or positioning, work or tools, of a kind normally removable from the machine controlled in conjunction with the operation of the tool
B23Q 15/00 - Automatic control or regulation of feed movement, cutting velocity or position of tool or work
G05B 19/4093 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
12.
METHOD OF MACHINING A DENTAL RESTORATION WITH REDUCED CONTOUR FALSIFICATION
The present invention relates to a method of machining at least one dental restoration (1) from a workpiece (2) using one or more dental tools (3), comprising: a step of defining a target contour (4) of the dental restoration (1); characterized by further comprising: a step of predicting the deflection of the dental tool (3) during pre-machining through a model based on one or more machining parameters; a step of determining based on the prediction step one or more primary locations (5) at which the target contour (4) would have been damaged during pre-machining; a step of modifying the target contour (4) or the corresponding machining path by adding an oversize of material (6) substantially only at the primary locations (5) for preventing damage; and a step of pre-machining the workpiece (2) based on the modified target contour (7) or the corresponding modified machining path.
G05B 19/404 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
The present invention relates to a method of manufacturing a dental restoration, the method comprising: a construction step (S2) of preparing through a construction means construction data for a dental tool machine for machining the dental restoration from a workpiece, wherein the construction data defines at least the geometry of the dental restoration within the workpiece; and a starting step (S3) of starting machining of the dental restoration from the workpiece in accordance with the construction data; characterized by further comprising: a preparing step (S4) of starting preparing, before termination of the construction step (S2), the dental tool machine at least through equipping it with all the consumables essential for starting the starting step (S3), and completing preparing the dental tool machine before start of the starting step (S3).
The present invention relates to a dental tool (1) for use in a dental CNC milling/grinding machine for machining a dental restoration from a workpiece (6), the dental tool (1) comprising: a shaft (2); characterized by further comprising: a miniaturized RFID tag (3) which is arranged in front of the back end (2a) of the shaft (2). The present invention also relates to a dental CNC milling/grinding machine (5) characterized by comprising: a machine compartment (5a) including one or more carriage units (5b) each adapted to exchangeably receive and drive one or more dental tools (1) for machining a dental restoration from a workpiece (6); one or more transceiver units (5c) each adapted to read and/or write the miniaturized RFID tag (3) of a dental tool (1); and a control unit adapted to control the transceiver units (5c), and the carriage units (5b) based on the information read from the miniaturized RFID tags (3).
The present invention provides a computer-implemented method of planning of the shapes of free-form tool paths (P) for simultaneous two-sided machining of a dental restoration (1) having an individual free-form target geometry from a workpiece (2) by using a dental tool machine (3) comprising at least two tool spindles each having at least one tool (4) arranged on a different side of the workpiece (2) which is simultaneously movable along an axis (y) relative to the tools (4) and thereby imposing a kinematic axis coupling, characterized by further comprising: a step of determining transformations (T´, T´´) of the target geometry by which the kinematic axis coupling is converted into a common coupling parameter for both tools (4); and a step of generating dependent on these transformations (T´, T´´) the shapes of the free-form tool paths (P) in which the common coupling parameter is identical in time for all participating tool spindles that are driven simultaneously.
B23Q 39/02 - Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
The present invention relates to a method of imposing quality requirements on a 3D model (1) including support structures (2) to be built by an additive manufacturing apparatus comprising: a platform (3) for holding the 3D object corresponding to the 3D model (1), the method comprising: a step of defining the surface geometry and the orientation of the 3D model (1) with respect to the platform (3), wherein the surface geometry includes surface segments; characterized by further comprising: a step of attributing a degree of quality (L;H) to the surface segments respectively against post-processing for the subsequent removal of the support structures (2); a step of calculating, based on the defined orientation, the surface geometry and the degree of quality (L;H) attributed, the positions on the surface segments where the support structure (2) may be added; and a step of adding the support structure (2) to the 3D model (1) based on the calculated positions and the degree of quality (L;H) attributed.
The present invention relates to a method of determining the orientation of a 3D Model (1) to be generated by an additive manufacturing apparatus comprising: a vat for holding photocurable material; and a platform for holding the 3D object corresponding to the 3D model (1), wherein the platform is relatively movable with respect to the vat, the method comprising: a step of defining the surface geometry of the 3D model (1), wherein the surface geometry includes a plurality of surface segments s i , wherein i denotes an integer, and A i denotes the surface area of the i th surface segment s i ; characterized by further comprising: a step of assigning, either manually by the user or automatically by a computer program, one or more weighing factors f i to the surface segments s i , respectively, wherein the weighing factor f i is indicative of a degree of sensitivity of each of the surface segments s i , against effects arising from mechanical removal of any support structure thereon, wherein the weighing factor f i is larger than 1 for surface segments s i, which are considered as being sensitive, and for all other surface segments s i, f i , is equal to 1; a step of defining an evaluation function R ( T,f) = - ( I ), wherein T and f respectively denote the polar and the azimuth angles of the 3D model orientation relative to the building direction, P supp,i denotes a probability indicative of the need of the individual surface segments s i to be supported through a support structure, and the summations denoted with S extend over all surface segments s i ; and a step of determining the orientation of the 3D model (1) relative to the platform based on the evaluation function R through optimization with respect to the polar and the azimuth angles respectively in order to avoid or reduce as much as possible support structures in sensitive surface segments of the 3D model.
The present invention relates to a method of determining layer thicknesses (t) of a three- dimensional model (1) for generation with an additive manufacturing apparatus, the method comprising: a step of determining the layer thicknesses (t) according to an adaptive slicing algorithm in which the thickness of a layer (2) is calculated through a relation based on the inclination of the normal vectors (n) of the surface elements (s) of the 3D model (1) which at least partly enclose the layer (2) from a horizontal direction (x;y), the method being characterized by further comprising: a step of selectively imposing on at least one surface element (s) of the 3D model (1) a precision requirement out of one or more selectable different precision requirements which respectively differently alter in the determination step the relation with respect to the inclination of the normal vector (n) of the said at least one surface element (s) which allows, through the altered relation, the layer thickness (t) to obtain a value smaller or larger than the layer thickness (t) determined through the unaltered relation.
The present invention relates to a method of operating a stepper motor for use in a dental tool machine (1) for removing material from a dental blank (2), the method comprising: a step of adapting torque reserves of the stepper motor at operating points to net load moments (M_net) respectively, characterized by further comprising: a first step (S1) of predicting, through simulation, the net load moments (M_net) beforehand; a second step (S2) of predicting, through simulation, the supply current (I_tr) to be supplied to the stepper motor for setting up the torque reserves that correspond to the predicted net load moments (M_net) respectively; and a step (S3) of driving the stepper motor based on the predicted supply current (I_tr).
The present invention relates to an endodontic file clip (1) for an apex locator, comprising: a hollow body (2); a push button (3) movably linked to the body (2); a spring (4) pushing the push button (3) away from the body (2); an electrically conductive hook (5) movably arranged within the body (2) and partly protruding out of the tip (2a) of the body (2) and fixed to the push button (3) to securely attach an endodontic file (6) to the tip (2a) when the push button (3) is released towards the closed position, and disengage from the endodontic file (6) when the push button (3) is pressed towards the open position; characterized by further comprising: a detachment mechanism (7) for re-attachably detaching the push button (3), the spring (4) and the hook (5) from the body (2) for cleaning and disinfection in a dental washer disinfector, wherein the detachment mechanism (7) comprises a detachment slot (2c;2c´) in the body (2) which extends up to the tip (2a) and joins said hole, to allow manual detachment of the push button (3), the spring (4) and the hook (5) from the body (2) when the hook (5) is manually moved from said hole into the detachment slot (2c, 2c´).
The present invention relates to a method of preparing a digital 3D model suitable to be generated and post-processed with an additive manufacturing system (1) comprising: an additive manufacturing apparatus (2) for generating the 3D object (3) corresponding to the prepared digital 3D model, attached to a platform (4) which can be gradually moved upwards, out of a fluid resin (5a) in a vat (6); and at least one post-processing apparatus (7) for performing at least one of washing, drying and curing the 3D object (3) received and maintained in the state attached to the platform (4) during the post-processing, the method comprising: a step of providing the digital 3D model; the method being characterized by further comprising: a step of determining fluid-collecting, basin-like, open regions (8) or fluid-sucking, dome-like, open regions (9) of the digital 3D model orientated in said state relative to the platform (4), and a step of including at least one drain channel (10) and/or at least one vent channel (11) into the fluid-collecting, basin-like, open region (8) and/or the fluid-sucking, dome-like, open region (9) in the digital 3D model respectively for preventing collection of fluid (5a, 5b) or suction of fluid (5a, 5b) during the generation process and the post-processing process.
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
The invention relates to a method for producing a tooth replacement part (120) from a blank (112) using a CAM processing device (102). The method comprises a step of varying the orientation of a blank body (114) in a processing position relative to two processing tools (104, 106). The varying comprises a first orienting of the blank body and processing tools relative to one another from a first processing orientation into a second processing orientation. In so doing, the orientation of the blank body relative to the two processing tools in the first processing orientation in relation to the orientation of the blank body relative to the two processing tools in the second processing orientation is pivoted at a first pivot angle.
A stereolithography apparatus (1) for generating a three-dimensional object (2), comprising: an optical unit (4) for projecting an image towards the photocurable substance (3) for hardening the photocurable substance (3) deposited in the focus layer (5); a control unit (6), characterized by further comprising: a detection unit (7) which comprises: a detection means (8) movably arranged in a detection region (9) for detecting during the generation process or in a generation-pause the image projected by the optical unit (4) and for outputting a detection signal; and a first driving means (10) for moving the detection means (8) into or out of the detection region (9), wherein the optical unit (4) comprises: a second driving means (11) linked to the optical unit (4) for moving the focus layer (5) into or out of the detection region (9), wherein the control unit (6) adjusts the optical unit (4) and/or modifies the image to be projected based on the signal indicative of the detected image.
B29C 64/129 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B29C 64/232 - Driving means for motion along the axis orthogonal to the plane of a layer
B29C 64/236 - Driving means for motion in a direction within the plane of a layer
A stereolithography apparatus (1) for generating a three-dimensional object (2) from a photocurable substance (3), comprising: a vat (4) for storing the photocurable substance (3); and a platform (5) for supporting the three-dimensional object (2), wherein the platform (5) is movable relative to the vat (4); an optical unit (6) for sequentially projecting layered images towards the photocurable substance (3) for hardening the photocurable substance (3) deposited between the three-dimensional object (2) and the bottom of the vat (4); further comprising: an oscillation unit (7) adapted to horizontally oscillate the vat (4) concomitantly with the projection of the layered images with a substantially constant amplitude that is smaller than the pixel size of the layered images in the horizontal direction for preventing adhesion of the three-dimensional object (2) to the bottom of the vat (4).
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
B29C 64/255 - Enclosures for the building material, e.g. powder containers
25.
MATERIAL UNIT FOR AN ADDITIVE MANUFACTURING DEVICE
Material unit (1) for an additive manufacturing device (AM) having a resin vat (2), wherein the resin vat (2) comprises a base (3) which is transparent at least in sections, wherein the resin vat (2) is connected to a holder (4) for a reservoir (5), and wherein the holder (4) is configured such that resin (R) emerging from an outlet (6) of a reservoir (5) held by said holder can flow into the resin vat (2).
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
B01F 31/441 - Mixers with shaking, oscillating, or vibrating mechanisms with stirrers performing an oscillatory, vibratory or shaking movement performing a rectilinear reciprocating movement
B01F 33/452 - Magnetic mixers; Mixers with magnetically driven stirrers using independent floating stirring elements
26.
TRANSPORTABLE ASSEMBLY UNIT FOR AN ADDITIVE MANUFACTURING DEVICE
Transportable assembly unit for attachment to a stereolithographic additive manufacturing device (1), comprising a component carrier (45) for an additive manufacturing device (1), wherein the component carrier (45) comprises a construction surface (7), on which a component (8) to be manufactured is disposed during the operation of the manufacturing device (1), wherein the component carrier (45) comprises a sealing surface (14) which radially surrounds the construction surface (7), the transportable assembly unit further comprising a container (5), wherein the component carrier (3) is adapted for placement onto the container (5) as a lid; and method for post-processing a component (8) manufactured according to an additive manufacturing process using such a component carrier (3).
B08B 3/04 - Cleaning involving contact with liquid
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B29C 64/379 - Handling of additively manufactured objects, e.g. using robots
B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing
B08B 3/10 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
27.
METHOD FOR MEASURING PATIENT-SPECIFIC TEMPOROMANDIBULAR JOINT RELATION AND TRANSFERRING IT INTO A VIRTUAL ARTICULATOR
The present invention relates to method of measuring patient-specific temporomandibular joint relation and transferring it into a virtual articulator (2) by using a device (1) comprising: a transfer linkage (3) which can be attached from its upper end to a face bow (4); an impression means (5) for holding impression material (6) and for taking the impression of the upper jaw and/or the lower jaw of the patient through said impression material (6); at least a first form-fitting component (7) fixed at the lower end of the transfer linkage (3), for leaving an impression (8) on the impression material (6) to be placed on the grip (9) of the impressions means (5) projecting out of the mouth of the patient.
A61C 19/045 - Measuring instruments specially adapted for dentistry for recording mandibular movement, e.g. face bows
A61C 7/00 - Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
28.
DENTAL DEVICE FOR RIDGE PRESERVATION AND PROMOTION OF JAW BONE REGENERATION IN AN EXTRACTION SITE
Dental device (1) for ridge preservation around the socket (2) of an extracted tooth and for promoting jaw bone regeneration inside the socket (2) of the extracted tooth, the dental device (1) comprising: a screw (3) which is entirely made of a biodegradable material to eliminate the need for a removal surgery, wherein the screw (3) is adapted for tight fixation within the jaw bone (4) in the socket (2) to prevent micromovements during bone-tissue regeneration, wherein the screw (2) has a length such that its top is, in the inserted state, flush with the alveolar ridge (5) around the socket (2) to promote full bone regeneration inside the socket (2), and wherein the screw (3) has a hollow (6) and pores (7), wherein the diameters of the pore (7) is substantially equal to or larger than 20 micrometers.
A system for visualizing patient stress or discomfort during dental treatment. By visualizing a patient's changing stress conditions during treatment, a clinician may react accordingly such as by stopping a treatment activity, slowing a treatment activity, refreshing anesthesia, etc. in order to improve the patient's experience.
A method, system and a computer readable storage media for operating dental machines through an augmented reality control interface. A hands free interface may enable the control of a dental machine during dental treatment by using dexterous parts of the body other than the upper limbs (e.g. by using the lower limbs) on a first user/control interface to send instructions corresponding to a second user/ control interface that is different from the first user/control interface.
A method and system for dynamically providing visual feedback about a quality of data collected during intra-oral scanning. Images or light patterns are projected onto an object such as teeth for 3D measurement and for relaying feedback about a quality of the 3D measurement to a user. In this way unsuccessful registrations surface areas of the teeth that have not been acquired yet may be corrected by informing the user to repeat scans at corresponding locations in the intra-oral cavity.
A method, system and computer readable storage media for proposing and visualizing orthodontic treatments. A patient may use a mobile device such as a smart phone to quickly and inexpensively visualize an orthodontic treatment for misaligned teeth and overlay it on a 3D model of the face and jaw, with a depth sensor being used to detect depth information. The orthodontic treatment may also be visualized in an augmented manner for a clinician. 3D data of the orthodontic treatment may be used for further analysis or fabrication of a treatment appliance.
The invention relates to a method for constructing a dental component (1) using a graphic representation (5) of a dental condition. A 3D volume model (6) of the dental condition is thus already correlated with a 3D surface model (7) of the dental condition, wherein the graphic representation (5) of the 3D volume model (6) is restricted to relevant regions (34) by delimitation using the 3D surface model (7) or using a section (21) thereof, wherein the remaining regions of the 3D volume model (6) are hidden.
The present invention relates to a method for the design and manufacture of a dental component with a surface, wherein a 3D model of the dental component is designed by means of a CAD unit and the dental component is manufactured by a CAM unit on the basis of the 3D model. In order to provide a method which significantly shortens the time required for the design and manufacture of a dental component, so that the length of the dental session at which the patient must be present is shortened, it is inventively proposed that the 3D model is manufactured in at least one first design step, in which a first 3D submodel is designed with at least one first surface section, and a second design step in which a second 3D submodel is designed with at least one second surface section, wherein the first design step is completed before the second design step and the CAM unit begins the manufacture of the first surface section of the dental component based on the first 3D submodel before the design of the second 30 submodel is completed.
A61C 13/20 - Methods or devices for soldering, casting, moulding or melting
G05B 19/4097 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
35.
SYSTEM AND METHOD FOR DETERMINING THE COLOR OF TEETH AND ATTACHMENT FOR USE IN THE SYSTEM
The invention relates to a system and a method for determining the color of teeth or tooth surfaces, wherein the system comprises a 2D or 3D camera and an attachment on said camera, which sets a geometry of a captured image in such a way that, compared to capturing an image without the attachment, the distance, spatial angle and orientation of tooth surfaces relative to the camera are restricted. The attachment according to the invention can in particular be fitted to the camera in a simple manner.
G01J 3/50 - Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
A61B 1/24 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth
A61C 19/04 - Measuring instruments specially adapted for dentistry
The present invention relates to a device (16) for editing a panoramic radiography image (24) of an examination object (12) generated by a panoramic X-ray machine (14), comprising: an input interface (36) for receiving the panoramic radiography image as well as reconstruction data of the panoramic radiography image, the reconstruction data including information on a course of projection lines (28) of the panoramic radiography image between an X-ray source (18) and an X-ray detector (20) of the panoramic X-ray machine as well as information on an image surface (30) of the panoramic radiography image; an evaluation unit (38) for evaluating the reconstruction data and for determining an image section (46) of the panoramic radiography image that has been generated on the basis of one of the projection lines with two intersection points (32, 34) with the image surface; an image editing unit (40) for editing the panoramic radiography image based on the determined image section; and an output unit (42) for outputting the edited panoramic radiography image. Moreover, the invention relates to a method for editing a panoramic radiography image (24) of an examination object (12) generated by a panoramic X-ray machine (14) as well as a diagnosis system for examining a craniomaxillofacial area of a patient.
In a method of planning a restorative dental treatment for a patient, at least two dental restorations are digitally constructed (20). In the process, an optimum specification (40) for the insertion of the restorations into the mouth of the patient is calculated (30), wherein the optimum specification for the insertion of the restorations comprises an optimum sequence of the restorations to be inserted; if applicable, including optimum insertion paths for the restorations to be inserted.
The invention relates to a device (1) for a system for the layer-by-layer construction of a body (K) from a radiation-curable substance (S), having a trough (3) with a trough base (2) for receiving the radiation-curable substance (S), having a construction platform (4) which is arranged above the trough base (2) and can be height-adjustable in relation to the trough base (2), and having a sensor (5) which interacts with the trough base (2). The trough base (2) is at least partially flexible and a chamber (6) is provided, said chamber (6) being defined on the lower side of the trough base (2) and the sensor (5) is designed to detect a change in volume of the chamber (6) and to provide a sensor signal from which a sign of the volume change can be determined.
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
The present invention relates to an apparatus (28) for varying a focal point (24) of an optical system in a dental 3D-scanner (10), comprising: a lens unit (30) with a lens (20) being movable between a front reversal position and a rear reversal position to vary a position of a focal point with respect to a scan object (22); a guide unit (34) for guiding a movement of the lens unit between the front reversal position and the rear reversal position along a guide axis (48) being parallel to an optical axis (46) of the lens; and a drive unit (36) for driving the movement of the lens unit, said drive unit including a linear motor (38) with an anchor (40) and a stator (42), said anchor being movable along a drive axis (44) of the drive unit that is parallel to the guide axis, said stator being affixed to the guide unit. The present invention further relates to a dental 3D-scanner (10) for scanning a three-dimensional scan object.
A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
G02B 7/08 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
G02B 27/64 - Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
CA 03098404 2020-10-26 Abstract Method for constructing a dental component The invention relates to a method for constructing a dental component (1, 2, 4, 5), specifically a restoration (2, 4, 5), bite tray or impression tray, wherein a tooth situation (7) is measured by means of a dental camera (6) and a 3D model (10) of the tooth situation (7) is generated. A convolutional neural network (CNN) for machine learning is applied to the 3D model (10) of the tooth situation (7) and a 3D model (21, 23, 25) of the component (1, 2, 4, 5), specifically the restoration (2, 4, 5), bite tray or impression tray, is generated automatically. Date Recue/Date Received 2020-10-26
The invention relates to a method for designing a drilling template (1), wherein, by means of a dental camera (2) or a LaborScanner a dental situation (3) is measured and a 3D surface model (5) of the dental situation (3) is produced and/or by means of an X-ray device (6) or an MRI device the dental situation (3) is measured and a volume model (11) of the dental situation {3) is produced. In this case an artificial neural network for machine learning (convolutional neural network; CNN) is applied to the 3D surfaces (5) of the dental situation (3) and/or to the volume model (11) of the dental situation (3) and/or to an initial 3D model (50) of the drilling template (1) and automatically produces a ready made 3D model (30) of the drilling template (1).
The present invention relates to a dental prosthesis forming block (10) for producing a dental prosthesis (50). Said forming block comprises a pin (20) with a self-tapping outer thread, which is arranged on a first surface (11) of the dental prosthesis forming block (10). The invention further relates to a method for producing a dental prosthesis (50). In this method the dental prosthesis block (10) is provided and the dental prosthesis (50) is produced by removing material from the dental prosthesis forming block (10) by means of a CAD/CAM method, such that the pin (20) forms part of the finished dental prosthesis (50).
A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
43.
DENTAL PROSTHESIS MOLDING BLOCK AND METHOD FOR PRODUCING A DENTAL PROSTHESIS PART FROM THE DENTAL PROSTHESIS MOLDING BLOCK
The present invention relates to a dental prosthesis molding block for producing a dental prosthesis part. The block comprises an inner material that is at least partially surrounded by an outer material, the hardness of which differs from the hardness of the inner material. The inner material forms part of a first surface of the dental prosthesis molding block. The invention further relates to a method for producing a dental prosthesis part. In said method, a dental prosthesis 10 molding block is provided, and the dental prosthesis part is produced by removing material from the dental prosthesis molding block using a CAD/CAM process. In doing so, a pin having a self-tapping external screw thread is created.
A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
44.
METHOD FOR PRODUCING A DENTAL PROSTHESIS PART AND DENTAL PROSTHESIS PART
The invention relates to a dental prosthesis part production method, wherein: a dental prosthesis part model (2) is generated taking into account a denture model (3); a load analysis of the dental prosthesis part model (2) is carried out; a first reinforcing structure model (4) having a first shape and position is arranged inside the dental prosthesis part model (2) and the dental prosthesis part model (2) is reduced by a volume corresponding to the arranged first reinforcing structure model (4); the reduced dental prosthesis part model (2) is divided into a lower partial volume (6) and an upper partial volume (8); a lower part (10.1) of the dental prosthesis part (10) according to the lower partial volume (6) is produced from a first composite material by means of the 3D printer (9); a first reinforcing structure (11) corresponding to the first reinforcing structure model (4) is arranged on the first part (10.1) of the dental prosthesis part (10); and an upper part (10.3) of the dental prosthesis part (10) according to the upper partial volume (8) is placed, by means of the 3D printer (9) using the first composite material, onto the lower part (10.1) of the dental prosthesis part (10) having the arranged first reinforcing structure (11).
The invention relates to a method for producing an artificial gingiva (1), in which a 3D model (3) of the artificial gingiva (1) is already provided. A gingiva template (4) representing at least partial areas (5) of the 3D model (3) of the artificial gingiva (1) is made as a female mould using the 3D model (3) of the artificial gingiva (1).
30 Abstract Container for use in stereolithographic systems The invention relates to a container for holding a s photosensitive liquid for use in a stereolithographic system in which a reference layer is exposed to radiation for the layer-by-layer or continuous creation of workpieces. At least one element of the container which is directly adjacent to the reference layer consists of at least one material which is at least partially transparent to the radiation and at least some of which has structures and/or pores which can receive and discharge, preferably also store, an inhibitor and/or an inhibitor mixture. Therefore, the element is not just able to supply the inhibitor but to a significant extent consists of the inhibitor itself, as a result of which the supplied flow is equalized or homogenized. Rapid or even continuous 3D printing is thus made possible in a cost-effective manner. 2 0 Date Recue/Date Received 2020-12-10
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
The invention relates to a window system for an intraoral scanner. Said window system has an optical element (20) with a thermal conductivity of more than 1 W m-1 K-1. A window (30), which has a pane (31) made for example of a plastic, glass or corundum, is releasably arranged on the optical element (20) spaced apart therefrom at an average distance of less than 1 mm. At least one heat source (40) is also connected to the optical element (20). The invention further relates to an intraoral scanner. Said intraoral scanner has the window system. The optical element (20) and the at least one heat source (40) are connected to the intraoral scanner. The window (30) is arranged in a cover. Said cover can be arranged on the intraoral scanner such that the window (30) is spaced apart from the optical element (20) at an average distance of less than 1 mm.
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
A61B 1/12 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements
A61B 1/253 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth with means for viewing areas outside the direct line of sight, e.g. dentists' mirrors with means for preventing fogging
48.
METHOD FOR PRODUCING A DENTAL AID FROM A THERMOPLASTIC FILM OR PLATE
The invention relates to a method for producing a dental aid from a thermoplastic film or plate, wherein a digital three-dimensional working model is created in a computer-aided manner using a three-dimensional data set of at least one part of an upper jaw and/or lower jaw; a physical working model is produced based on the digital working model; the plastic film or plate is deep drawn on the physical working model inside a deep-drawing device; the dental aid is created from the deep drawn plastic film or plate by separation along a cutting line; prior to producing the physical working model, the digital working model is supplemented with an auxiliary structure automatically and/or via manual input means; the auxiliary structure is configured as an elevation or a depression and extends along a digital cutting line model in the working model; and the digital cutting line model is created in the digital working model automatically and/or via manual input means.
A61C 7/00 - Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
The invention relates to a method for constructing a restoration (1), in which a dental situation (3) is measured by means of a dental camera (2) and a 3D model (4) of the dental situation is generated. In this case, a computer-assisted detection algorithm is applied to the 3D model (4) of the dental situation (3), wherein a type of restoration (17) and/or at least a tooth number (18) and/or a position of the restoration (1) to be inserted are automatically determined.
The invention relates to a measuring system (1) for measuring an implant-implant situation (5) for planning an implant-supported tooth replacement part (33) supported on at least two implants (3, 4, 6, 7), comprising a scanning template (2) and the at least two set implants (3, 4, 6, 7). The scanning template (2) has cut-outs (11, 12, 13, 14) for the individual implants (3, 4, 6, 7), wherein first markings (25) are arranged on surface regions (24) around the cut-outs (11, 12, 13, 14).
A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
51.
COMPUTER-ASSISTED MANUFACTURING METHOD FOR A DENTAL REPLACEMENT PART OR A DENTAL AUXILIARY ELEMENT
The invention relates to a method for the computer-assisted manufacturing of a tooth replacement part or a dental auxiliary element from a blank, which can be rotated about an axis of rotation (10), by means of a machine tool, wherein a blank data set (8) comprising the axis of rotation (10) and a model data set (1) of the tooth replacement part or dental auxiliary element are stored and the model data set (1) has a first region (4) having a first insertion axis (5) and a second region (6) having a second insertion axis (7) askew to the first insertion axis (5), wherein in a first positioning step (S1) the model data set (1) is arranged in the blank data set (8) in such a way that the first insertion axis (5) of the model data set (1) is oriented perpendicular to the axis of rotation (10) of the blank data set (8) and in a second positioning step (S2) the second insertion axis (7) of the model data set (1) is oriented perpendicular to the axis of rotation (10) of the blank data set (8) by rotating the model data set (1) about the first insertion axis (5).
The invention relates to a method for calibrating a temperature measuring device (1) of a dental oven (2) by means of at least one calibration element (6), which is heated in the dental oven (2) during a heating time interval (dt), wherein the at least one calibration element (6) has at least one measurement material (7) having a reversible phase transition occurring at a first transition temperature (TC1), the phase transition causes a rapid change to at least one first parameter (I) of the dental oven (2), the temperature in the furnace chamber (3) is measured by means of the temperature measuring device (1) as an actual temperature (T), and the parameter (I) is measured, at least one first rapid change (dl1) of the first parameter (I) is determined, a deviation of the first actual temperature value (T1) from the first transition temperature (TC1), measured by the temperature measuring device (1), upon the first rapid change (dl1) of the first parameter (I) is determined, and the actual temperature (T) of the temperature measuring device (1) is corrected according to the deviation.
The invention relates to an induction furnace for carrying out a heat treatment of a dental replacement part, comprising an induction coil, a radiant heater, an insulation layer and a furnace chamber. The induction furnace has a cooling system with a liquid cooling system in order to control an internal temperature of the furnace chamber.
A system for scanning anatomical structures and for displaying the scanning result is made available, wherein the system has the following: an intra-oral scanner (10), which records an image of the anatomical structures intra-orally, an extra-oral detection unit (20), which detects a spatial position of the intra-oral scanner (10) relative to an observer or to a person carrying out the scanning, and a computing unit (30) which, during the scanning procedure, places the scanner (10) in communication with a screen (40) and with the detection unit (20) and generates a scanning result based on the intra-orally recorded image of the anatomical structures and the detected spatial position of the intra-oral scanner (10) relative to the observer, and which, during pauses in the scanning procedure, estimates the position, orientation and scaling of the anatomical structures and generates an image, corresponding to the estimation, of the anatomical structures as a scanning result, wherein the screen (40) displays the scanning result generated by the computing unit (30).
A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
A61B 90/00 - Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups , e.g. for luxation treatment or for protecting wound edges
A61B 5/107 - Measuring physical dimensions, e.g. size of the entire body or parts thereof
55.
METHOD AND MEASUREMENT SYSTEM FOR OPTICALLY MEASURING AN OBJECT
The invention relates to a measurement system (1) for optically measuring an object (2), comprising a dental camera (5) and an optical attachment (6). The optical attachment (6) comprises at least one lens (7, 8), which is shaped and arranged in such a way that the optical attachment (6) has a negative focal length such that a measurement field or a measurement volume (9) of the dental camera (5) is enlarged by the optical attachment (6).
Sintering furnace for components made of sintered material - in particular, dental components The invention relates to a sintering furnace for components made of a sintered material - especially, for dental components - comprising a furnace chamber having a chamber volume and a chamber inner surface, wherein a heating device, a receiving space having a gross volume located in the chamber volume and delimited by the heating device, and a useful region having a useful volume located in the gross volume are arranged in the furnace chamber, and the furnace chamber has an outer wall consisting of several walls with a wall portion to be opened for introduction into the receiving space of a component to be sintered with an object l'olume. The heating device has, in the furnace chamber, a thermal radiator with a radiation field, which radiator is arranged on at least one side of the receiving space. This thermal radiator has a specific resistance of 0.1 Omm2/m to 1,000,000 Omm2/m and has a total surface area that is at most 3 times the chamber inner surface area. With a maximum power consumption of 1.5 kW, a heating temperature of at least 1,100 C can be achieved with this sintering furnace within 5 minutes.
F27D 11/06 - Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer
57.
SINTERING FURNACE FOR COMPONENTS MADE OF SINTERED MATERIAL, IN PARTICULAR DENTAL COMPONENTS
The invention relates to a sintering furnace (1) for components (15) made of a sintered material, in particular for dental components, comprising a furnace chamber (2) having a chamber volume (VK), wherein a heating device (5), a receiving space (9) having a gross volume (VB) located in the chamber volume (VK) and delimited by the heating device (5), and a useful region (10) having a useful volume (VN) located in the gross volume (VB), are disposed in the furnace chamber (2). The furnace chamber (2) has an outer wall (3) consisting of a plurality of walls having a wall portion (7) to be opened for introduction of a component to be sintered having an object volume (VO) into the receiving space (9). In the furnace chamber (2) the heating device (5) has a thermal radiator (6) having a radiation field (13) which is disposed on at least one side of the receiving space (9). At least the useful volume (NV) disposed in the receiving space (9) is disposed in the radiation field (13) of the radiator (6), wherein the maximum possible distance (d) of the component (15) to be sintered from the radiator (6) corresponds to at most twice the dimension (Dy) of the maximum useful volume (VN).
The invention relates to a method for planning a heat treatment of a dental prosthesis part, in which a 3D model of the dental prosthesis part to be produced already exists. A temperature profile for the heat treatment of the dental prosthesis part is automatically determined by a computer as a function of determined geometric parameters of the dental prosthesis part to be produced and/or of determined material parameters of the dental prosthesis part to be produced.
The invention relates to a magnetic field unit (1) of an MRI system (18) for image capturing a head region as the region to be recorded, comprising at least one permanent magnet (2) for generating a main magnetic field, a device (3) for generating a gradient field, and at least one coil (4) for generating and receiving radio frequencies. The magnetic field unit (1) is fastened to a mounting (19) such that a longitudinal axis (A) of the magnetic field unit (1), together with a vertically extending axis, forms an angle of no more than ±45° and that the magnetic field unit (1) and the patient (P) can be adjusted relative to each other such that the magnetic field unit (1) can be moved to a position surrounding the head of the patient (P).
In a method for processing a blank (1), in which the blank (1) can be densely sintered with shrinkage following machining and machining of the blank (1) is carried out in a machining device (7) allowing for an individual scale-up factor (F) relevant to the blank (1) for compensating for the shrinkage occurring during dense sintering, a linear measurement of the blank (1) is performed in one or more of the dimensions length, width, and height for determining the scale-up factor (F), wherein the measured linear measure (1) bears a known relationship to the scale-up factor (F), the type of blank (1) being known. Linear measurement of the blank (1) can be carried out in the machining device (7).
The invention relates to a process, a blank, an assortment of blanks, a tooth database, and a database of blanks, for the production of a dental prosthetic item. The method comprises the provision of a 3D model of a dental prosthetic item and the selection of a suitable blank from a plurality of possible blanks. The provision of the 3D model of the dental prosthetic item comprises the determination of an esthetically relevant designed subregion of the 3D model of the dental prosthetic item as part of an exterior surface of said dental prosthetic item, and a blank is specified from a plurality of blanks having a prefabricated esthetically relevant terminal subsurface of a surface of the tooth, the terminal subsurface of said blank being such that it at least approximates the thus specified designed subregion. The 3D model of said dental prosthetic item is carved from the selected blank such that the prefabricated terminal sub-surface of said blank remains unmachined in at least a central region thereof.
The invention relates to a device for selecting an area (2; 22; 32; 42; 52; 62; 72; 82) of a dental restoration body (1;71), which is depicted in a 3D representation. At least portions of the area limit are provided in the form of dental-specific lines (5, 6, 8). The aim of the invention is to carry out a dental construction of a restoration body with the aid of a CAD system, whereby certain areas of the restoration body can be selected and construction tools are provided for machining the selected area in a 3D representation. To this end, the area (2; 22; 32; 42; 52; 62; 72; 82), which is to be machined with a construction tool, can be determined by selecting dental-specific lines (5, 6, 8) or dental-specific points (7.1 7.4) or a preparation edge (4). The method is used for assigning area limits to the selected area, said area limits being provided, at least in part, in the form of dental-specific lines (5, 6, 8).
patents
