Abstract: A system and method for creating a model of a patient's mandible and any teeth supported from the mandible and manipulating the mandible relative to anatomical features of the patient's maxilla. The system uses markers positioned on the mandible and on the maxilla to create a functional mandibular axis that approximates an axis through the condyles of the patient. The functional mandibular axis and geometric and anatomical information about the patient's upper and lower jaw are then used to create prostheses for the patient. The system is also used for making corrections to the prosthesis.

Abstract: The invention provides a dentition movement track indicator and a tracing method. The device includes an intra-oral fixation assembly and an extra-oral movement indicating assembly, wherein the intra-oral fixation assembly includes a lower denture base, a left side retention steel wire, a right side retention steel wire and a positioning steel wire. The lower denture base is arranged on the lingual side of the lower dentition and respectively extends from a lower incisor to the far center of the last tooth on the left side and the right side and clings to the lingual mucous membrane. The left side retention steel wire and the right side retention steel wire are distributed in a left-right symmetry mode. The extra-oral movement indicating assembly includes a connecting rod, an arc rod, an indicating plate and a plurality of rectangular parallelepiped thin rods. According to the dentition movement track indicator, an intra-oral fixation assembly.

Abstract: In one aspect of the present application, there is provided a computer-implemented method for generating a digital data set representing a target tooth arrangement, the method comprises: obtaining a first and a second 3D digital models respectively representing upper jaw teeth and lower jaw teeth under an initial tooth arrangement, where the first and the second 3D digital models are in a predetermined relative position relationship; extracting features from the first and the second 3D digital models; generating a first digital data set representing a target tooth arrangement of the upper jaw teeth and the lower jaw teeth based on the extracted features using a trained recurrent neural network based deep learning neural network.

Abstract: Apparatuses, components, devices, methods, and systems for determining and tracking movement are provided. An example apparatus that includes a position indicating system having a first light emitter positioned and oriented to emit light in a first direction, a second light emitter positioned and oriented to emit light in a second direction, the second direction being collinear with and opposite to the first direction; and a third light emitter positioned and oriented to emit light in a third direction, the third direction being different than the first direction and the second direction. The third direction may be offset from the first direction by an offset angle that is an acute angle. The apparatus may also include a screen; an imaging system configured to capture an image of the screen. The first light emitter and the third light emitter may both be configured to emit light toward the screen.

Abstract: The invention relates to a method for producing a guided bite splint for a supporting jaw comprising at least one guide for an opposing jaw. A 3D model of an upper jaw and/or a 3D model of a lower jaw are available, wherein the 3D models of the upper jaw and the lower jaw are arranged relative to one another in an occlusal position and integrated into a virtual articulator model which simulates an articulation movement of the lower jaw relative to the upper jaw, wherein a 3D model of the bite splint is constructed using the 3D model of the upper jaw and/or the 3D model of the lower jaw, wherein the at least one guide for the opposing jaw is constructed automatically on the 3D model of the bite splint with the aid of a computer.

Abstract: Systems and methods of tracking a head of a patient are provided. The system includes a motion tracking system and a head tracker. The head tracker includes a frame, at least one trackable target coupled to the frame, at least one nose pad coupled to the frame, and a pair of adjustable ear coupling members coupled to the frame and shaped for engaging with at least a portion of a back surface of an ear of the patient. The head tracker is configured to apply a clamping force to hold the trackable target in a stable spatial relationship with a location of interest in the head. The motion tracking system includes a sensor for tracking the trackable target and a processor configured for determining a position of the location of interest from the position and orientation of the trackable target and the stable spatial relationship.

Abstract: According to the invention, a method and system are provided for scanning, and for facilitating scanning of, an intraoral cavity. The target parts of the intraoral cavity that it is desired to have scanned are identified, and the spatial s relationships between a scanning device and the target parts of the intraoral cavity suitable for enabling said target parts to be scanned by said scanning device, are also identified or otherwise determined. These relationships are then displayed, and the displayed relationships are used as a guide for scanning the intraoral cavity.

Abstract: A device for moving a lower jaw forward includes an upper teeth mounting portion on which upper teeth of a human body are mountable, a lower teeth mounting portion on which lower teeth of the human body are mountable, a sensing portion capable of sensing information which determines a movement time of the lower teeth mounting portion, and a driving portion capable of moving the lower teeth mounting portion relative to the upper teeth mounting portion according to a sensing result of the sensing portion. The driving portion includes a power portion which provides a force for moving the lower teeth mounting portion and a driving connection portion which connects the power portion to the lower teeth mounting portion.

Abstract: A method for generating a dental arch map for a patient acquires a 3D surface image of patient dentition and automatically segments the 3D surface image to identify individual teeth. A mapping of outlines is formed for the identified teeth. The mapping is labeled according to a tooth numbering scheme and the labeled mapping is displayed.

Abstract: Herein are provided methods, systems, computer-readable media, techniques and processes for occlusion estimation in dental prosthesis design. These include determining a first contact point between antagonist teeth, then simulating motion in order to determine additional contact points. Various of the determined contact points may not be used in the simulated motion, based on the simulated physics. When one or more predetermined stopping criteria have been met, then the contact points may be used to define the relative occlusal positions of antagonists. In some embodiments, sets of teeth in a bridge or crown, e.g., may be simulated as moving separately and a new state for each set of teeth may be determined.

Abstract: An oral anterior guidance system including: a mandibular retention piece; a mandibular guidance component coupled to the mandibular retention piece, the mandibular guidance including a convex outer surface proximate a first end; a maxillary retention piece; and a maxillary guidance component coupled to the maxillary retention piece, the maxillary guidance component including a concave inner surface, wherein the concave inner surface and the convex outer surface are configured to interact to guide movement of a patient's mandibular dental arch when the mandibular retention piece and the maxillary retention piece contact as the patient's mandibular dental arch closes, and wherein the mandibular guidance component is positioned anteriorly to an anterior of the anterior wall of the mandibular retention piece.

Abstract: A method for generating movement rotation information includes: acquiring a jaw image including a plurality of teeth; specifying first position information indicative of positions of three or more points individually corresponding to three or more types of teeth included in the jaw image; acquiring, in accordance with positional relationship information that associates types of teeth with second position information indicating positions of reference points, the second position information corresponding to three or more reference points individually corresponding to the three or more types of teeth; calculating movement rotation information so that a plane including the three or more points is made coincide with a reference plane including the three or more reference points, the movement rotation information including at least either of a movement amount and a rotation amount with respect to the plane including the three or more points; and outputting the movement rotation information.

Abstract: A set of three-dimensional markers enables accurate transfer of scanned dental information from an intra-oral scanner to a virtual articulator, for axis transposition in axiography and for accurate determination of individual values, such as Bennett and condylar guidance angles. The set of three-dimensional markers includes a first marker, which is aligned with a buccal face of an upper incisor, and a second marker, which is positioned outside buccal surfaces of the teeth. The first marker consists of three elements which fit together in a number of different combinations to form a single piece. For edentulous patients, a third marker and a spacer element are provided.

Abstract: A clutch apparatus includes a mandibular clutch device and a maxillary clutch device. The mandibular clutch device includes a mandibular clutch configured to be affixed to mandibular teeth, a mandibular face bow connected to the mandibular clutch, and first and second collimated light sources connected to the mandibular face bow. The maxillary clutch device includes a maxillary clutch configured to be affixed to maxillary teeth, a maxillary face bow connected to the maxillary clutch, and first and second position-sensitive diodes (PSDs) connected to the maxillary face bow. Each of the mandibular and maxillary face bow is selectively adjustable to position the first and second light sources and the first and second PSDs in a plurality of positions.

Abstract: A three-dimensional computer model of the patient's tooth, including the pulp chamber and root canals, is created by combining at least one grey value image of the tooth and/or surface information about at least part of the intra-orally visible part of the tooth with a statistical, parameterized shape model of each tooth type (upper or lower incisors, canines, pre-molars, molars) as the patient's tooth to be treated. This allows for planning and/or simulation of one or more root canal treatments on the computer model of the patient's tooth and that the dentist or dental specialist is given qualitative and/or quantitative information by the system in order to aid in adequately analyzing the risks related to performing the root canal treatment with the proposed or user-selected endodontic tools.

Abstract: Apparatuses, components, devices, methods, and systems for determining jaw movement are provided. An example patient assembly for capturing motion data of a patient includes a clutch configured to be worn by the patient on a dentition of the patient. The clutch includes a dentition coupling device configured to couple to the dentition of the patient and includes an extension member configured to protrude out from the patient's mouth. The clutch also includes a position indicating system rigidly connected to the dentition coupling device. An example position indicating system emits a plurality of light beams. Some examples also include an imaging system and a motion determining device. An example imaging system captures a plurality of image sets that each include at least one of a plurality of screens upon which the light beams project. An example motion determining device processes the captured image sets to determine the motion of the patient's dentition.

Abstract: It is described an arrangement (230, 330, 430, 530) and a method for tracking a movement of an upper jaw (100) relative to a lower jaw (120), the arrangement comprising: a lower mounting structure (231) mountable relative to the lower jaw (120); at least one lower motion sensor system (233) mounted at the lower mounting structure; and at least one data transmission unit (127) adapted to transmit measurement data (245) from the lower motion sensor system to an analysis unit (239).

Abstract: Method and system for displaying an orthodontic related image including one or more image segments, selecting one or more movement indicators associated with a corresponding one or more of the image segments, and dynamically displaying a modified orthodontic related image based on the selected one or more movement indicators are provided.

Abstract: A system for fabricating a dental restoration to restore a plurality of teeth in a dentition of a patient is described. The dentition includes a restoration dental arch and an opposing dental arch. The restoration dental arch includes a restoration site and the opposing dental arch is opposite the restoration dental arch. The system includes an impression apparatus, a motion capture apparatus, an interference model generation system, and a restoration design system. The impression apparatus is configured to capture an impression of the dentition of the patient. The motion capture apparatus is configured to capture a plurality of location data points that represent the locations of the opposing dental arch relative to the restoration dental arch. The interference model generation system is configured to generate an interference model for the restoration site. The restoration design system is for designing a restoration using the interference model.

Abstract: The present invention relates to a three-dimensional surface image generating method and system using a multi-energy X-ray image and an optical image, and more particularly, to a three-dimensional surface image generating method and system using a multi-energy X-ray image and an optical image which reconstruct an X-ray tomographic image with an improved contrast of soft tissue including skin of an object using two or more multi-energy X-ray transmission data, calculate a three-dimensional surface model for the object, and combine optical image information including color information of the object to generate a three-dimensional surface image for the object.

Abstract: A system for fabricating a dental restoration to restore a tooth at a restoration site in a dentition of a patient is disclosed. The dentition includes a restoration dental arch and an opposing dental arch. The restoration dental arch include the restoration site and the opposing dental arch is opposite the restoration dental arch. The system includes an impression apparatus, a motion capture apparatus, an interface apparatus, and a restoration design system. The impression apparatus is configured to capture an impression of the dentition of the patient. The motion capture apparatus is configured to capture a plurality of location data points that represent the locations of the opposing dental arch relative to the restoration dental arch. The interference model generation system is configured to generate an interference model for the restoration site. The restoration design system is for designing a restoration using the interference model.

Abstract: A system and method for creating a model of a patient's mandible and any teeth supported from the mandible and manipulating the mandible relative to anatomical features of the patient's maxilla. The system uses markers positioned on the mandible and on the maxilla to create a functional mandibular axis that approximates an axis through the condyles of the patient. The functional mandibular axis and geometric and anatomical information about the patient's upper and lower jaw are then used to create prostheses for the patient. The system is also used for making corrections to the prosthesis.

Abstract: Embodiments are provided for digital dental modeling. One method embodiment includes receiving a three-dimensional data set including a first jaw and a second jaw of a three-dimensional digital dental model and receiving a two-dimensional data set corresponding to at least a portion of the first jaw and the second jaw. The method includes mapping two-dimensional data of the two-dimensional data set to the three-dimensional digital dental model by transforming a coordinate system of the two-dimensional data to a coordinate system of the three-dimensional data set. The method includes positioning the first jaw with respect to the second jaw based on the two-dimensional data mapped to the three-dimensional data set. The method includes using at least a portion of the two-dimensional data mapped to the three-dimensional data set as a target of movement of the first jaw with respect to the second jaw in the three-dimensional digital dental model.

Abstract: A system for fabricating a dental restoration to restore a plurality of teeth in a dentition of a patient is described. The dentition includes a restoration dental arch and an opposing dental arch. The restoration dental arch includes a restoration site and the opposing dental arch is opposite the restoration dental arch. The system includes an impression apparatus, a motion capture apparatus, an interference model generation system, and a restoration design system. The impression apparatus is configured to capture an impression of the dentition of the patient. The motion capture apparatus is configured to capture a plurality of location data points that represent the locations of the opposing dental arch relative to the restoration dental arch. The interference model generation system is configured to generate an interference model for the restoration site. The restoration design system is for designing a restoration using the interference model.

Abstract: An electronic register device for recording movements of the lower jaw of a person relative to the upper jaw of the person, the device having a bite fork for recording a position of the upper jaw relative to reference points on the head of the person, wherein the bite fork is designed to receive a plastic compound for recording an impression of the dentition of the upper jaw. The register device further includes a lower-jaw attachment for recording movements of the lower jaw relative to the upper jaw. In addition, the register device has a reference body, wherein the register device is designed so that the reference body can be connected in a fixed position to the bite fork. The bite fork and the reference body connected thereto in a fixed position are designed in such a way that both the impression and also the reference body can be recorded by a scanning procedure. In this way, it is possible to establish a relationship between the scanned impression and the movement data recorded by the register device.

Abstract: An impression tray set for edentulous jaw is formed by a maxillary impression tray and a mandibular impression tray respectively including a tray main body having a U-shaped groove on which an impression material is to be applied on a front surface thereof, an engaging part formed on a back surface of the U-shaped groove in a position corresponding to an alveolar ridge of front teeth, and a handle part detachably connected to the engaging part. Each of the maxillary and mandibular impression trays includes projecting parts provided on the back surface at portions corresponding to an alveolar ridge from a first molar part to a premolar part. The projecting parts determine bite position and height in a state in which at least a part of flat top surfaces of the projecting parts contact each other when taking an impression.

Abstract: A speech recognition system is to be used on a human subject. The speech recognition system includes an image capturing device, an oral cavity detecting device and a speech recognition device. The image capturing device captures images of lips of the subject during a speech of the subject. The oral cavity detecting device detects contact with a tongue of the subject and distance from the tongue of the subject, and accordingly generates a contact signal and a distance signal. The speech recognition device processes the images of the lips and the contact and distance signals so as to obtain content of the speech of the subject.

Abstract: A system and method of video-based chew counting by receiving image frames from a video camera, determining feature points within the image frames from the video camera, generating a motion signal based on movement of the feature points across the image frames from the video camera, and determining a chew count based on the motion signal.

Abstract: This invention relates to improved methods and apparatus for recording and simulating the condylar movement of an individual. This invention also provides a dental articulator which is designed to simulate the jaw or condylar movements of a patient. This instrument enables a dentist to obtain the necessary diagnostic information for treatment of the occlusal irregularities, such as malocclusion, and the fabrication of dental cast or “dentures”.

Abstract: A method for determining the position of an intraoral measuring device which is to be moved relative to an organ of mastication of a patient and with which positions in the organ of mastication or areas of the organ of mastication are measured. To be able to carry out measurements without a fixed reference, it is proposed that, independently of a reference that is independent of the patient, the position of the measuring device is measured by means of a position-determining sensor that is in a fixed relationship to the measuring device.

Abstract: A computer implemented method includes providing a first set of digital data corresponding to an upper arch image of at least a portion of an upper dental arch of a patient, providing a second set of digital data corresponding to a lower arch image of at least a portion of a lower dental arch of the patient, providing bite alignment data representative of the spatial relationship between the upper dental arch and the lower dental arch of the patient, and aligning the upper and lower arch images relative to one another based on the bite alignment data until an aligned upper and lower arch image is attained. The aligned upper and lower arch images are moved towards each other until a first contact point is detected and at least one of the upper and lower arch images is moved relative to the other in one or more directions to a plurality of positions for determining optimal occlusion position of the lower and upper dental arches.

Abstract: An intra oral dental device and method for recording the 3D envelope of motion of a patient and translating the recording into digital information used to diagnose, computer design and manufacture dental restorations. The dental device is comprised of upper and lower tracing members having tracing pins on one member and complementary recording material on the other. The method includes forming a set of intra oral gothic arch tracings to define the 3D envelope of motion, converting the tracings to a digital data set reproducing the motion, and using the data to create a virtual model of the patient and the jaw motion. The data is used to mill articulator housings to reproduce jaw motion, to virtually position and shape virtual teeth in conformity with the patient's jaw motion, and to mill the completed dental prosthesis insuring teeth contacting surfaces are in harmony with the patient's jaw motion.

Abstract: Apparatus for detecting motions of a lower jaw relative to the upper jaw of a vertebrate, comprising a first holder (30) to be fixed to the head of a vertebrate with a fixed assignment relative to the upper jaw for accommodating transmitter or receiver units of a position determining system (1) for the detection of motion, a second holder (40A) to be fixed to the lower jaw on the left side for accommodating corresponding left-sided receiver and transmitter units of the position determining system, a third holder (40B) to be fixed to the lower jaw on the right side for accommodating corresponding right-sided receiver and transmitter units of the position determining system, and a first evaluation unit (13) for processing signals from the receiver units so as to generate a differentiated dynamic image of the motions of the left and right sides of the lower jaw from relative positional changes of the transmitter units (11) which are associated with the motions of the lower jaw and are detected by the receiver un

Abstract: An electronic register device for recording movements of the lower jaw of a person relative to the upper jaw of the person, the device having a bite fork for recording a position of the upper jaw relative to reference points on the head of the person, wherein the bite fork is designed to receive a plastic compound for recording an impression of the dentition of the upper jaw.

Abstract: An intra-oral mandibular advancement appliance to be inserted in the mouth of a patient so as to maintain an open airway to the patient's throat and thereby improve breathing during sleep. The mandibular advancement appliance has particular application for use by those wishing to reduce the effects of snoring and/or sleep apnea. The appliance includes an upper tray assembly against which is seated the patient's teeth carried by his upper jaw and a lower tray assembly against which the patient's teeth carried by his lower jaw are seated. The lower tray assembly is mated to and slidably adjustable by the patient relative to the upper tray assembly. By virtue of the foregoing, the position of the patient's lower jaw can be selectively and continuously moved forward with respect to the position of the upper jaw to prevent an occlusion of the airway as the patient's condition changes over time.

Abstract: The invention concerns methods and a device for the determination of the centric position of a human set of teeth with improved precision. This is needed for the adjustment of an articulator in the production of dentures. For this purpose a plurality of successive bite movements or displacement movements of the lower jaw are recorded in form of electronic signal data and evaluated for the determination of the centric position.

Abstract: A method for generating a radiologic three-dimensional digital volume tomography image of a patient's body part includes fixing a marker support to the patient's body part. The marker support is provided with a non-radioopaque support body in which a plurality of radioopaque marker elements are affixed. A nominal size S and/or a nominal distance D of the radioopaque marker elements to each other is known. The body part is image recorded with a digital volume tomography device so as to generate a three-dimensional raw image of the patient's body part. A size S? and/or a distance D? of the radioopaque marker elements in the three-dimensional raw image is measured. An aberration value is generated by comparing the size S? and/or the distance D? with the respective nominal size S and/or the nominal distance D of the radiopaque marker elements. The three-dimensional raw image is corrected with the aberration value.

Abstract: In a method according to an embodiment of the present invention, a plurality of microsphere targets is applied to a surface of a tooth on the upper dentition of a person and a tooth surface of the lower dentition of the person. At least two sets of stereoscopic images are obtained, where the microsphere targets are visible in the field of view of each image. The center position of the beads is photogrammetrically determined in three dimensions for each set using the images taken from perspective positions. The change in bead positions in the sets of stereoscopic images is analyzed to mathematically characterize the jaw motion of the person.

Abstract: A TemporoMandibular Joint (TMJ) balancing appliance and a method for using the same are provided, in which a first base portion accommodates incisor teeth, a second base portion is extended from a left side of the first base portion and accommodates left molar teeth, and a third base portion is extended from a right side of the first base portion and accommodates right molar teeth. The first base portion includes an upper part for accommodating upper incisor teeth and a lower part for accommodating lower incisor teeth and has a center for accommodating the upper and lower incisor teeth higher than the left and right sides.

Abstract: A denture grinding machine includes: a denture-holding table for holding dentures; a grinding tool for grinding the dentures held on the denture-holding table; a main body for holding the grinding tool; a moving mechanism for causing relative movement between the denture-holding table and the main body; and a driving mechanism for relatively driving the main body and the denture-holding table. The moving mechanism moves relatively the denture-holding table and the main body in three-dimensional coordinate directions based on grinding portion data, and the grinding tool performs grinding of the denture occlusal surface from a direction perpendicular to the occlusal surface.

Abstract: Methods, devices, and storage media provide for receiving a selection of parameters pertaining to an animal; receiving a selection of parameters pertaining to an animal interaction with a cable; simulating the animal interaction based on the selection of parameters pertaining to the animal and the animal interaction; collecting test data during the simulating; and storing the test data.

Abstract: Apparatus for detecting motions of a lower jaw relative to the upper jaw of a vertebrate, comprising a first holder (30) to be fixed to the head of a vertebrate with a fixed assignment relative to the upper jaw for accommodating transmitter or receiver units of a position determining system (1) for the detection of motion, a second holder (40A) to be fixed to the lower jaw on the left side for accommodating corresponding left-sided receiver and transmitter units of the position determining system, a third holder (40B) to be fixed to the lower jaw on the right side for accommodating corresponding right-sided receiver and transmitter units of the position determining system, and a first evaluation unit (13) for processing signals from the receiver units so as to generate a differentiated dynamic image of the motions of the left and right sides of the lower jaw from relative positional changes of the transmitter units (11) which are associated with the motions of the lower jaw and are detected by the receiver un

Abstract: A jaw-relation reproduction condition is determined by measuring a jaw movement of a patient, and reproducing a jaw state of the patient on an occlusion-state reproducing apparatus in accordance with the jaw-relation reproduction condition. Dentures are arranged on the apparatus in accordance with the jaw-relation reproduction condition to prepare pre-grinding dentures. Denture data with reference points which is three-dimensional image data containing reference points that represents a positional relationship between the jaw-relation reproduction condition and the dentures and an occlusal surface of the dentures. An occlusion state of the denture data with the reference points is reproduced by using the jaw-relation reproduction condition on a three-dimensional image. Grinding data of a grinding portion is determined under a dynamic condition or set condition from a portion surrounded by an image of upper and lower jaws on the three dimensional image in a reproduced occlusal state.

Abstract: The present invention provides a evaluating system of masticatory efficiency comprising a first step of allowing a human subject to masticate an artificial food material containing microparticles that are finely crushed and ground by mastication and keep a spherical shape unless they are masticated; a second step of enlarging the artificial food material having been thus masticated by applying pressure to a thickness equal to the diameter of the microparticles while sandwiching the artificial food material between two preparation sheets; and a third step of counting microparticles keeping the spherical shape that remain in the artificial food material having been enlarged between the two preparation sheets by applying pressure. By using this evaluating system in the invention, the masticatory efficiency can be evaluated well in precise and at short time without using a solvent and expensive instruments.

Abstract: In certain embodiments, an apparatus for treating a breathing condition includes an oral appliance, a mask, and a tensioning device. The oral appliance is configured to receive at least some of a wearer's teeth and a mask. The mask is configured to deliver gas to the wearer. The mask includes a chamber configured to cover the wearer's mouth. The chamber is at least partially enclosed by an interior of the mask. The tensioning device couples the mask to the oral appliance and includes a flexible tension element at least partially disposed between the oral appliance and the mask and within the chamber. The flexible tension element is configured to apply a tensile force between the mask and the oral appliance.

Abstract: A mandibular manipulator instrument used as a standalone tool or with associated mouthpiece that includes two interlocking laterally sliding frames which interlock to create a movable upper and a lower incisor pull driven by a pair of pinion shafts and shaped for receiving a patient's central incisor teeth. A screw thread is used to provide a precise lateral motion for the sagittal measurement. The mouthpiece is constructed of resilient rubber. The mandibular manipulator may be positioned and held in a resilient flexible mouthpiece by the two pinions protruding through acoustically tight apertures respective to each pinion's position. The manipulator can be used for other application in an embodiment without the mouthpiece and/or in combination with a bite registration shape that is part of the manipulator frame.

Abstract: An oral appliance is provided for the treatment of snoring and obstructive sleep apnea. The oral appliance includes an upper tray adaptable to conform to a user's maxillary dentition and a plurality of lower trays, each of the lower trays adaptable to conform to the user's mandibular dentition. At least some of the lower trays are structured to engage the upper tray, each of the lower trays are structured to impart a different fixed amount of mandibular advancement.

Abstract: A jaw-relation reproduction condition is determined by measuring a jaw movement of a patient, and reproducing a jaw state of the patient on an occlusion-state reproducing apparatus in accordance with the jaw-relation reproduction condition. Dentures are arranged on the apparatus in accordance with the jaw-relation reproduction condition to prepare pre-grinding dentures. Denture data with reference points which is three-dimensional image data containing reference points that represents a positional relationship between the jaw-relation reproduction condition and the dentures and an occlusal surface of the dentures. An occlusion state of the denture data with the reference points is reproduced by using the jaw-relation reproduction condition on a three-dimensional image. Grinding data of a grinding portion is determined under a dynamic condition or set condition from a portion surrounded by an image of upper and lower jaws on the three dimensional image in a reproduced occlusal state.

Abstract: A denture grinding machine includes: a denture-holding table for holding dentures; a grinding tool for grinding the dentures held on the denture-holding table; a main body for holding the grinding tool; a moving mechanism for causing relative movement between the denture-holding table and the main body; and a driving mechanism for relatively driving the main body and the denture-holding table. The moving mechanism moves relatively the denture-holding table and the main body in three-dimensional coordinate directions based on grinding portion data, and the grinding tool performs grinding of the denture occlusal surface from a direction perpendicular to the occlusal surface.

Abstract: An apparatus to replicate and analyze movement of a mandible relative to a maxilla with dental casts thereof includes a base frame, an arm connected to the base frame and a suspension assembly positionable by a plurality of electro-mechanical actuators. The arm connects to the base frame and supports the dental cast of the maxilla in a fixed position relative to the base frame. The suspension assembly, having opposing first and second sides, supports the dental cast of the mandible in working relation to the dental cast of the maxilla. The plurality of actuators each selectively impart movement to the sides of the suspension assembly such that the movement of the mandible obtained during a recording process can be replicated on the apparatus in real time.