Abstract: A method for generating a 3D model for assisted navigation of an oral cavity, comprises: receiving a first dataset including surface boundary information from a first scan and generating a 3D model from at least a portion of the first dataset, performing a 3D surface scan of a part of the intraoral cavity using a 3D scanner to acquire the 3D scan, the 3D scan including a ROI, matching the 3D scan to at least a portion of the 3D model, determining, employing the 3D scan and the model, a spatial transformation configured to align or bring into a degree of registration the 3D scan and the 3D model, determining a position and orientation information of the 3D scanner relative to the 3D model using the transformation, and generating a second dataset including the position and orientation information of the 3D scanner relative to the 3D model.

Abstract: A process for aligning at least two different digital scan data each representing at least a part of a dentition of a patient includes scanning the patient's dentition so as to record volumetric 3-dimensional digital scan data in a volumetric coordinate system and scanning the patient's dentition so as to record topographic 3-dimensional digital scan data in a topographic coordinate system. The teeth or jaws of the patient's dentition are segmented and approximated from the digital scan data by grouping the digital scan data with respect to structures and approximating a surface of the segmented teeth using triangle meshes. A key point determination is performed for each tooth based on the triangle mesh representation to define 3-dimensional coordinates of a tooth surface feature in the volumetric or topographic coordinate system. The key points are aligned to obtain aligned digital scan data by coordinate transformation of one coordinate system.

Abstract: A two-component composition including a first component A including water or an aqueous solution, and a second component B including a self-setting adhesive powder including at least a multivalent metal salt and phosphoserine, and at least one monocarbonate selected from the group of sodium carbonate, ammonium carbonate and potassium carbonate, wherein the monocarbonate is present in a concentration between 4 and 12% by weight of component B.

Abstract: A two-component composition including a first component A including water or an aqueous solution and a second component B including a self-setting adhesive powder including at least a multivalent metal salt and phosphoserine, and at least one hydrogen carbonate, wherein the hydrogen carbonate is present in a concentration between 1 and 8% by weight of component B.

Abstract: An electronic dental torque wrench is described, including a head with a receiving opening defining a rotation axis and configured to receive a screwing instrument, a shaft defining a shaft axis and configured for applying a torque to the head, wherein the receiving opening is configured to engage with the screwing instrument upon rotation of the shaft around the rotation axis in a tightening direction, wherein the shaft includes a force sensor including one or more force-sensitive resistors and configured to sense the force on the shaft generated upon rotation of the shaft around the rotation axis in a tightening direction, wherein the one or more force-sensitive resistors are arranged at one or more sensor surfaces which are substantially perpendicular to the tightening direction.

Abstract: A dental implant for implantation in bone tissue, comprising an implant body having a threaded portion including a core having a core surface from which at least one thread extends radially outwards wherein the thread has a plurality of recesses interrupting the thread and having each time a surface and a base defined as a region of the surface comprising a radially inner most point of the recess, wherein recesses of the plurality of recesses have a recess surface that is planar and forming a flat base that extends in a plane parallel to a central longitudinal axis of the implant or to a plane parallel to a plane tangent to the core surface at a point corresponding to the intersection of the core surface with a radius of the core crossing the radially inner most point of the recess.

Abstract: A powder injection molding apparatus for molding a dental article, the apparatus including: a) an injection unit including a barrel, a nozzle and conveying the arranged in the barrel for conveying feedstock in the direction towards the nozzle, and b) a mold enclosing a mold cavity fluidically connected with the injection unit via a mold gate, the mold cavity extending along a longitudinal axis A from a proximal cavity area, into which the mold gate opens, to a distal cavity area, The apparatus wherein the mold includes a mold block and a mold piston, which together delimit the mold cavity, the mold piston being slideably arranged in the mold block and moveable in relation to the mold block along the longitudinal axis A.

Abstract: The present disclosure discusses techniques for fabricating bite interference elements within polymeric dental appliances. The techniques disclose at least one polymeric shell that includes a number of cavities shaped to fit over a patient's teeth. The polymeric shell includes an occlusal appliance surface shaped to fit over an occlusal tooth surface of the patient. One or more bite interference elements are formed within the occlusal appliance surface, and each bite interference element includes a partially disc-shaped feature extending radially away from the occlusal tooth surface when worn by the patient.

Abstract: A process for manufacturing an orthodontic device includes scanning at least a part of a patient's dentition so as to record a volumetric 3-dimensional scan data, and segmenting the scan data so as to obtain individual teeth and/or jaws. A tooth main axis is determined for each tooth in order to obtain a two-dimensional key point representation of each tooth in the occlusal plane. An even order parametric polynomial curve is fit to approximate the dental arch. The even order polynomial curve is transformed into a spline representation. One or more 2-dimensional cuts through the volumetric 3-dimensional digital scan data is selected, wherein at least one size dimension of a tooth is determined from the 2-dimensional cut. An orthodontic device is manufactured, wherein at least one size dimension of the orthodontic device is a function of the size dimension of the tooth.

Abstract: A method for generating a virtual model of an object in a patient's anatomy. The method employs a surface scan of an anatomical region of the patient's oral cavity and a volumetric density scan of the anatomical region. The method includes receiving a first dataset of labeled surface scan segments, receiving a second dataset of labeled volumetric density scan segments, cross-mounting in a coordinate system, labeled surface scan segments from the first dataset to labeled volumetric density scan segments from the second dataset, receiving identification of the targeted extraction object, identifying the 3D volumetric density model and the 3D surface model associated with the volumetric density scan segment label, and generating a third dataset comprising and 3D model of a socket, a 3D model of portions of a tooth crown, a 3D model of portions of a target extraction tooth, and/or a 3D model of the extraction contour.

Abstract: In one aspect, a method for manufacturing a glazed dental prosthesis includes at least the steps of: a) providing a dental prosthesis body; b) position sensitive application of a predetermined amount of a glaze composition to at least a part of the dental prosthesis body surface, wherein the glaze comprises a heat sensitive coloring indicator and wherein this step is performed one or more times; c) controlling the applied glaze amount at least at one position of the glazed dental prosthesis body surface by assessing the color intensity at that position; and d) subjecting the coated dental body to a heat treatment to form the glazed dental prosthesis, wherein the temperature in the heat treatment is larger or equal to the de-composition temperature of the heat sensitive color indicator, wherein at least 90 mol-% of the coloring indicator are transformed into the colorless leuko-form.

Abstract: An arrangement for manufacturing a plurality of orthodontic appliances in parallel, includes an additive printing machine comprising a build platform and configured for additively manufacturing a plurality of teeth models in parallel, a plurality of plates each configured for teeth model printing by the additive printing machine, whereby each plate comprises a unique machine-readable identifier and each plate is detachable and precisely fixed to the build platform, and a thermoforming machine configured for thermoforming a thermoformable material over the plurality of teeth models for receiving the plurality of orthodontic appliances.

Abstract: A dental device is described. The dental device includes a surgical template having one or more sites for drilling osteotomies in the maxillary or mandibular jaw and a false teeth set. The surgical template and false teeth set are configured to fit together to form a denture prosthesis that can be implanted in a patient. Also described are a method for creating a surgical dental template, a method for implanting a dental prosthesis, and a method for reducing jaw bone in a patient.

Abstract: A ceramic dental implant for implantation into a jaw bone extending from an apical end to a coronal end. The implant has a blind bore open towards the coronal end and extends towards the apical end along a central longitudinal axis. The blind bore includes a threaded section having a base surface where a thread protrudes radially inwards. The threaded section includes a main portion, wherein the maximum thread radius remains constant along the portion length and, adjacent to the main portion, a tapered portion where the base surface tapers radially inwards from the maximum thread radius to the minimum thread radius at the apical end of the tapered portion, the tapered portion extending over an axial length greater than the thread pitch, forming a tapered thread having gradual reduction in thread depth, the tapered thread extending over more than one thread turn.

Abstract: A dental implant including an implant surface having at least partially a contact angle of less than 20°, the implant surface being at least partially covered by a protective layer having a keratin hydrolyzate.

Abstract: The invention relates to an additive method for producing a dental working model for an articulator, comprising the steps: additively producing a base plate for attachment to the articulator, and additively producing a dental model, wherein the base plate and the dental model are configured to be fixed to one another in a positionally secure manner. Another object of the invention is an additively produced dental working model for an articulator, comprising an additively produced base plate configured for attachment to the articulator, and an additively produced dental model, wherein the base plate and the dental model are configured to be fixed to one another in a positionally secure manner.

Abstract: A surface mapping and generating device which has devices for the process and/or cost optimization, in particular raw material recovery devices, an automatic control of the intensity of a used laser light, devices for carrying out a calibrating procedure by evaluating overlap errors at matching points, devices for archiving especially three-dimensional data of the jaw and/or for modeling the bite position of the upper and the lower jaws, devices for the optimized preparation of at least one dental stump for the production and placement of a dental prosthesis thereon and/or devices for taking into consideration the bite position of the upper and lower jaws.