83 results about "Mandible maxilla" patented technology

A facemask and accessories which overcomes the adverse effects and limitations of current designs by moving the maxilla and mandible in forward direction, which assists in correcting maxillary and mandibular skeletal and dentoalveolar deficiency and help expand the upper airway by advancing the mandible. This is accomplished by a design that is supported only by forehead and produces forces in front of maxilla and mandible. The extra-oral facebow design is characterized by providing two independent force adjustments, one above the forehead and the other one in front of the face by attachments to the upper and lower jaw bones and teeth. In particular, the two independent adjustments are provided by a fully adjustable forehead pad and bilateral adjustable bows on opposite sides of the facebow's extra-oral frame to provide protracting forces.

The invention provides a complete denture manufacturing method for determining a plane and jaw position relation based on digitization, and relates to the technical field of dentistry, the method comprises the following steps: using a finished product tray to prepare an initial impression, filling a plaster model, and scanning to obtain a three-dimensional data STL file of the plaster model of the upper and lower jaws; recording the occlusion relationship by using oil sludge silicone rubber, and scanning to obtain a three-dimensional data STL file of the upper and lower jaw plaster model with the occlusion record silicone rubber; obtaining a CBCT DICOM file when the patient wears and occludes the silicone rubber, and extracting a three-dimensional data STL file of the face, the maxilla and the mandible; fitting the archive to construct a virtual patient; and digitally designing a plane and a median relation jaw position, and the like. According to the method, the upper and lower jawbones are segmented by using CBCT DICOM data, the position of the lower jawbone is moved by using software, the jaw position is accurately designed, and the false tooth is manufactured on the basis of a correct plane and a correct median relationship, so that temporomandibular joint health and false tooth stability of a patient are facilitated.

The invention relates to dental medicine. A method for restoring an individual's vertical dimension of occlusion taking into account their facial proportions consists in obtaining, from a frontal view of the patient's face, an image of the patient's temporomandibular region and of the outline of the face, and determining from the image of the temporomandibular region the presence of condylar displacement in the joint space and the direction of the displacement in relation to the centric position. The same image is used to determine the patient's vertical dimension of occlusion and to ascertain the angular deviation from the Ricketts angle of normal vertical dimension of occlusion. The lower jaw is then relocated by the amount of the ascertained deviation and in the direction of said deviation to the SNA-Pm line of an SNA-Xi-Pm intermaxillary angle. The current Gl-Sn-Pog facial convexity angle is then determined for subsequent adjustment of the relocation of the lower jaw, and a digital graphical model is obtained of the lower jaw with the condyles in the normalized position in the joint space and in relation to the normalized intermaxillary angle and facial convexity angle.

The invention relates to a method and a device for generating a panoramic curved surface fault slice based on a CBCT image of three-dimensional segmentation, and the method comprises the steps: S1, carrying out the three-dimensional segmentation of teeth and a mandible in the CBCT image through a deep learning algorithm, and obtaining a tooth and mandible segmentation result; s2, acquiring a reference dental arch line for representing the dentition condition of the patient based on the segmentation result; s3, adjusting the dental arch line of each layer of slice containing the segmentation result based on the segmentation result and the reference dental arch line; and S4, extracting panoramic slice data from the CBCT image according to the dental arch line of each layer of slice, and generating a panoramic curved surface fault slice. According to the method, by means of the segmentation result, the oral cavity panoramic image with the target anatomical structure is accurately extracted from the CBCT image, a dentist can conveniently measure the length, the angle and the like, the adjacent relation of the dentition periphery can be conveniently observed, meanwhile, radiation absorption of secondary shooting is avoided, and the imaging accuracy is improved. And the problems of poor patient cooperation, inaccurate focusing positioning and the like during panoramic actual shooting are solved.

The invention provides a condyle positioning device and a lower jaw fixator with the condyle positioning device.The condyle positioning device comprises a condyle positioning component, a tooth retention guide plate and a dividing structure formed between the condyle positioning component and the tooth retention guide plate. Wherein the tooth retention guide plate and the condyle positioning component are of an integrated structure and can be separated along the segmentation structure, the condyle positioning component is suitable for being fixed to the front edge of the ramus of the mandible of a patient, and the tooth retention guide plate is manufactured based on the tooth form of the mandible part of the patient and fixed to the corresponding dentition. The condyle positioning component is connected with the lower jaw fixator through a mortise and tenon joint structure so as to position the specific position of the condyle of the patient after the lower jaw operation.

The invention discloses a fine-grained segmentation method and system for a three-dimensional CBCT skull image. The method comprises the following steps: firstly, constructing a first training data set; thirdly, in combination with the first training data set, training the secondary segmentation neural network model to obtain a trained secondary segmentation neural network model; then, segmenting a to-be-processed three-dimensional CBCT skull image by using the trained secondary segmentation neural network model to obtain a segmentation result of each structure of the skull; and finally, segmenting the bone cortex and cancellous bone of the upper and lower jawbones by using an improved region growing method to obtain a bone cortex and cancellous bone segmentation result corresponding to the upper and lower jawbones, thereby completing fine-grained segmentation of the three-dimensional CBCT skull image. According to the method provided by the invention, fine-grained areas of the oral maxillofacial region can be separated, and the fine-grained areas comprise intact skull, upper and lower jawbone, teeth, bone cortex, cancellous bone, neural tubes, maxillary sinus, incisor canals and other structures.

The present invention provides an osteosynthesis plate for fixing bone fragments in the repair of bone, particularly the mandible. [Solution] The plate body P comprises a plate body having at least one bridge portion BU used to bridge a gap S extending between bone fragments K1, the plate body comprising fixing portions BA1, BA2 each associated with at least one fixing point, at least one fixing point BP1, BP2 of the fixing portions formed on an island portion IA, the island portion being connected to each associated fixing portion only via spring segments FS1, FS2 which allow elastically restorable relative displacement between each fixing portion and each island portion, at least one of the spring segments causing relative displacement between the island portion and the associated fixing portion when a load is applied in the principal loading direction of the bone, and increasing the distance between the island portion and at least one bridge portion.

The invention relates to the technical field of oral tooth sockets, in particular to an oral bow adaptive adjusting tooth socket for stopping snore, which comprises an adaptive foundation, the adaptive foundation is used for fixedly adjusting the relative position relation of a connecting mechanism and a tooth socket assembly, and a connecting part is used for adjusting the tooth socket tension between an upper part and a lower part; the tooth socket assembly is composed of an upper tooth socket and a lower tooth socket and used for fixing the position of the mandible at different tooth positions adaptive to the foundation, and latticed lines and a plurality of T-shaped protrusions are distributed on the two sides of the upper tooth socket and the two sides of the lower tooth socket; the connecting mechanism is respectively connected with the tooth socket assembly and the adaptive foundation and is divided into an asymmetrical U-shaped upper part and an asymmetrical U-shaped lower part, trapezoidal latches are arranged on two sides of the U-shaped upper part and the U-shaped lower part, a plurality of adjusting holes are formed in the U-shaped bottom end, convex slide fasteners are arranged on two sides of the adjusting holes, and the tooth socket assembly can be clamped at different tooth positions of the adaptive foundation by the connecting mechanism. The distance between the upper jaw and the lower jaw is adjusted by moving the tooth positions and the connecting hole positions, and the device adapts to different oral cavity bow channel widths.

An intraoral device system includes an intraoral device; an upper splint structured to engage with at least a portion of one or more teeth on a maxilla of a patient; a lower splint structured to engage with at least a portion of one or more teeth on a mandible of the patient; a drive system for moving the lower splint with respect to the upper splint; and an adjusting feedback system. The adjusting feedback system can comprise a memory storing machine-readable instructions; and a control system including one or more processors configured to execute the machine-readable instructions. The machine readable instructions can cause the control system to: receive sensor data from one or more sensors associated with the patient; process the sensor data to determine a respiratory event likelihood parameter of the patient; and output control instructions to the intraoral device that operate the drive system to move the lower splint with respect to the upper splint responsive to the determined respiratory event likelihood parameter.

The application discloses a kind of three-dimensional CBCT skull image fine granularity segmentation method and system.The present application includes the following steps: first, construct first training dataset;Then, in combination with first training dataset, after training secondary segmentation neural network model, obtain trained secondary segmentation neural network model;Then, using trained secondary segmentation neural network model to the three-dimensional CBCT skull image to be processed is segmented, and the segmentation result of each structure of skull is obtained;Finally, using the improved region growing method is carried out the segmentation of the bone cortex and bone marrow of upper and lower jaw bones, and the bone cortex and bone marrow segmentation result corresponding to upper and lower jaw bones is obtained, so as to complete the fine granularity segmentation of three-dimensional CBCT skull image.The method proposed in the present application can separate the fine granularity region of oral and maxillofacial region, including complete skull, upper and lower jaw bones, teeth, bone cortex, bone marrow, nerve canal, maxillary sinus, incisor canal and other structures.

The invention relates to a system and / or an apparatus for an improved helmet system that may help reduce the severity of injuries by enhancing overall helmet protection through uniquely designed facemasks and facemask bumpers. The facemask and facemask bumpers that are particularly adapted to redistribute pressure and impact forces, decrease vibration, sudden shock, noise and / or the peak forces transmitted from the facemask to the rest of the helmet system. The facemask bumpers may be disposed into specific regions of the facemask, including the brow region, the glabella region, orbit region, the frontal region, the mandible (front, right and / or left side) region, the maxilla region, the nasal region, zygomatic region, the ethmoid region, the lacrimal region, the sphenoid region and / or any combination thereof.

The invention discloses an orthodontic visualization system and method for temporomandibular joint rotation simulation, and relates to the technical field of orthodontic medical treatment, and the system comprises a hard tissue extraction module which automatically extracts hard tissue image data from a patient skull CBCT image; the joint recognition control module recognizes anatomical features of the condyle process and the glenoid fossa and generates optimized condyle process rotation parameters; the jaw rotation control module dynamically optimizes a lower jaw rotation angle based on first-order and second-order change rates in the contact pressure distribution model; the tooth image intelligent virtual module is used for identifying a tooth form outline, simulating a tooth embedding or separating state and quantifying a vertical displacement amount of the tooth; the microprocessor integrates data of each module to generate dynamic image data; the visual terminal module dynamically displays a condylar process rotation track, contact pressure distribution and a tooth displacement state, and marks high-pressure and low-pressure areas through colors. According to the method, the accuracy and efficiency of orthodontic scheme design are improved, and the method has important clinical application value.

The invention discloses a tooth supporting type mandible tractor fixing guide plate and a manufacturing method, the fixing guide plate comprises a tooth fixing part, a connecting rod and a guide plate body, the tooth fixing part is fixed on a part of dentition of the lower jaw, and the two ends of the connecting rod are respectively fixed on the tooth fixing part and the guide plate body; a plurality of fixing holes used for determining the three-dimensional position of the retractor are formed in the guide plate body, first baffles protruding out of the guide plate body are arranged at the positions of the fixing holes, and bone nail guide grooves are formed in the surface of the guide plate body; the bone nail guide groove is formed by a strip-shaped groove formed in the guide plate body or a second baffle arranged on the guide plate body. After the fixing guide plate is implanted into a target position, a bone nail slides into the fixing hole along the bone nail guide groove, and the first baffle plate limits the bone nail to increase the accuracy, so that the fixing guide plate only needs to see the edge of the guide plate body close to the tooth side, the visual field exposure surface in an operation is reduced, the bone nail is guided to be in place from a minimally invasive intraoral incision, and the operation efficiency is improved. And safety and accuracy are both considered.

The snore-ceasing equipment comprises an upper tooth socket and a lower tooth socket, an upper tooth biting groove is formed in the upper end of the upper tooth socket, a lower tooth biting groove is formed in the lower end of the lower tooth socket, a vertical plate is fixedly arranged in the middle of the upper end of the lower tooth socket, a through hole is formed in the vertical plate, and a tightness adjusting rod is movably inserted into the through hole. The snore-ceasing equipment is characterized in that a tightness adjusting rod is fixedly arranged on the upper tooth socket, the end, extending into the inner side of the vertical plate, of the tightness adjusting rod is fixedly connected with the upper tooth socket, a pressing head is fixedly arranged at the other end of the tightness adjusting rod, and two conical rubber rings are fixedly arranged on the tightness adjusting rod. Three-gear adjustment can be carried out according to the requirements of different individuals to adapt to people with different mandible movement ranges, and the tightness adjusting rod is fixedly connected with the upper tooth socket and abuts against the upper tooth socket inwards, so that the mandible is driven to be supported outwards, the smoothness of the airway is guaranteed, and the snoring problem is solved.

A device (100) for treating sleep apnea or other breathing disorders is provided. The device (100) comprises an upper portion (101), a lower portion (102), and an intermediate portion (103). The upper portion (101) is configured to be placed on at least one tooth of the upper jaw of a patient, and the lower portion (102) is configured to be placed on at least one tooth of the lower jaw of the patient. The intermediate portion (103) is configured to couple the upper and lower portions (101, 102) together to maintain a fixed position of the upper and lower jaws when placed on the teeth of the upper and lower jaws of the patient. The device (100) further comprises at least one fastening member, such as floss, nitinol wire, rubber band or the like. The fastening member is configured to engage at least one interdental space of each of the upper and lower jaws to fasten the upper and lower portions (101, 102) to the teeth of the upper and lower jaws, respectively. The device of the present invention, thus, provides an improved oral appliance for treating sleep apnea, specifically obstructive sleep apnea, that is able to maintain the upper and lower jaws of the patient in a fixed position to keep the airway open.

The invention relates to the technical field of medical instruments, and provides a positioner for orthognathic surgery in order to solve the problems of large jaw bone positioning deviation, poor operation collaboration and insufficient flexibility in the surgery in the orthognathic surgery, the positioner comprises a fixing mechanism which sleeves the head of a patient and is used for providing a supporting reference relatively fixed with the head for the whole positioner; the distraction mechanism is connected to the fixing mechanism and used for distraction of lip and cheek soft tissue of the patient so as to expose an operation area; the positioning mechanism is connected to the lower portion of the distraction mechanism and used for locking the upper and lower jawbones of the patient at the preoperative designed positions and achieving reproduction. The device can synchronously realize skull reference fixation, stable exposure of soft tissues in an operation area and accurate positioning of the upper and lower jawbones, solves the problem of offset of the lower jawbones, supports rapid separation and reproduction of the positions of the jawbones in the operation, is adaptive to different patient forms, is suitable for various complex orthognathic operations, and improves the positioning accuracy and the operation collaboration.

The invention discloses an improved mandible navigation reference frame, and relates to the technical field of medical instruments, the improved mandible navigation reference frame comprises a main shaft, the top of the main shaft is provided with a navigation reference piece used for navigation in a mandible operation, the bottom of the main shaft is provided with a fixing piece used for being fixed to the lower jaw of a patient, and the main shaft is provided with a mouth distraction assembly used for distraction of the mouth of the patient; the hollow cup motor drives the driving nut to rotate, then the driving screw pushes the telescopic part to extend under the action of threads, the mouth of a patient is opened through the opening part at the movable end of the telescopic part, the driving nut is locked through the self-adaptive locking component, the telescopic part stops extending, and the mandible is exposed to the outside. A traction screw is screwed into the fixing piece, and the navigation reference frame is fixed to the lower jaw of the patient so as to navigate the lower jaw operation; the device has the advantages of being convenient to operate, high in mounting efficiency, good in fixing effect and wide in application range.

Devices, methods, software, and kits are provided for performing oral therapy with biofeedback to provide real-time data for clinicians to aid in designing a customized therapy plan and track patient compliance with a prescribed therapy regimen. The device provides mouthpieces, which are capable of providing both passive and active range of motion for the jaw. Inclusion of a distance sensor on the device allows measurement of mandible range of motion or maximal interincisal opening. The force, applied to the upper jaw and lower jaw during oral therapy, can be controlled by inserting springs into the device, which have different spring constants. The force on the jaw can further be adjusted by using spring offset inserts. In addition, the maximum range of motion for the jaw can be set using interchangeable top limit brackets or a top limit bracket comprising an adjustable range of motion limiter.

Orthodontic device (1) capable of causing a displacement of a mandible relative to a maxilla, comprising a lower part secured to said mandible and an upper part secured to said maxilla, connected in an articulated manner by two telescopic connecting rods (2), characterized in that the upper and lower parts each comprise a frame (3) produced digitally to at least partially surround a part of the teeth of the maxilla and the mandible, each frame (3) having a tongue (5) projecting laterally and towards the outside of the maxilla or the mandible, the tongue (5) comprising an orifice (9) comprising means for coupling an articulation element (7) of the connecting rod (2). Figure for the abstract: Fig. 6

The invention discloses a method for establishing a mouse radioactive jawbone injury animal model, which comprises the following steps of: performing tooth extraction operation, performing radiation treatment after one day, and performing Micro-CT (Computed Tomography) scanning, intraoral examination and histopathologic detection on the lower jawbone on the thirteenth day after radiation so as to determine that the radioactive jawbone injury mouse model is successfully constructed. The animal model has the advantages that the pathological process of human early radioactive jaw necrosis is accurately simulated; the model is stable, good in repeatability and suitable for large-scale experimental research; and a reliable, short-cycle and convenient-to-operate animal model is provided for the mechanism research of radioactive jaw necrosis and the development of new drugs.

The utility model discloses an adjustable jaw fixing device, which relates to the technical field of medical instruments, and comprises a lower jaw supporting plate and an elastic band, a driving mechanism is connected between two ends of the elastic band, the elastic band is connected with a cooling mechanism, a pair of first cavities is arranged in the lower jaw supporting plate, and a pair of second cavities is arranged in the lower jaw supporting plate. The elastic band penetrates through the two first cavities, and a pair of sliding blocks are fixedly connected to the elastic band; according to the adjustable jaw fixing device, a sliding block with an extension spring is arranged in a first cavity, an elastic band is fixed to the sliding block, adjustment of the elastic band can be achieved in cooperation with a fastening bolt, and therefore the adjustable jaw fixing device is suitable for patients with various lower jaw fractures, a hose capable of conveying cooling liquid is further arranged in the elastic band, and therefore the adjustable jaw fixing device is convenient to use. By matching with the driving mechanism and the cooling mechanism, circulating flow of cooling liquid can be achieved, a good cooling effect can be achieved, and the wearing comfort of a patient can be effectively improved.

Examples show a device for correcting the positioning of the teeth of the maxilla or mandible of an individual, comprising an orthodontic splint. The splint comprises an open cavity delimited by a rim and formed by a plurality of individual dental sockets whose shape is adapted to that of the teeth of the maxilla or mandible of the individual. The corrective device further comprises a base forming the rim of the cavity of the dental sockets, and the dental sockets have a lower hardness than the base. Abstract figure: [Fig. 1].

Disclosed herein is a method for acquiring a dental object of a patient with an object volume, in particular at least a part of a skull, an upper jaw and / or a lower jaw. To do so, a plurality of segment volume ranges are defined in the object volume, where the segment volume ranges overlap at most partially and directions of the segment volume ranges are not parallel to one another. The image data of the segment volume ranges is recorded by an MRI machine within a measuring volume of the MRI machine. A two-dimensional composite image is generated from the image data of the individual segment volume ranges by projecting the image data onto a target plane. The target plane is disposed parallel to a defined midsagittal plane of the skull or corresponds to the midsagittal plane, where a first segment volume range at least partially includes the midsagittal plane of the skull.

The invention relates to a manufacturing method of silica gel snore-preventing equipment, and belongs to the technical field of medical products. The method comprises the following steps: S1, data acquisition and modeling; s2, registering: registering the three-dimensional tooth jaw model with a skull side position sheet to realize space alignment of the tooth jaw model and airway soft tissue; s3, measurement and analysis: measuring airway clearance, tongue shape and jaw position parameters; s4, personalized correction: automatically setting the protraction amount and the vertical opening amount of the lower jawbone according to the measurement result, designing the dental arch expansion width according to the WALA ridge and the FA point, and designing the inclined plane angle of the tongue induction screen to guide the tongue body to move forwards and upwards; and S5, manufacturing. The limitation that a traditional snore preventing device can only move the lower jaw forwards singly is broken through, the three-dimensional comprehensive expansion of the length, the width and the height of the airway is achieved by cooperatively regulating and controlling the three-dimensional posture of the lower jawbone, the width of the dental arch and the posture of the tongue body, the airway volume is effectively increased, the ventilation efficiency is improved, and the correction effect on OSAHS is remarkably improved.

The embodiment of the invention provides a method for generating a three-dimensional tooth-jaw composite model, which comprises the following steps: acquiring an initial three-dimensional tooth-jaw composite model, the initial three-dimensional tooth-jaw composite model comprising an upper jaw tooth virtual model, an upper jaw bone virtual model, a lower jaw tooth virtual model and a lower jaw bone virtual model; under the condition that the relative pose relation of the maxillary virtual model and the mandibular virtual model is kept unchanged, teeth in the maxillary tooth virtual model and the mandibular tooth virtual model are subjected to decompensation alignment to obtain a preoperative three-dimensional tooth-jaw composite model; obtaining relative poses of a tooth model and a corresponding bone block model in the preoperative three-dimensional tooth-jaw composite model and a jaw correction treatment demand; under the condition that the relative poses of the tooth model and the corresponding bone block model in the preoperative three-dimensional tooth jaw composite model are kept unchanged, the poses of all the bone block models in the preoperative three-dimensional tooth jaw composite model are adjusted according to the orthognathic treatment requirement, and a postoperative three-dimensional tooth jaw composite model is obtained.

The utility model provides a head support for a neurointervention operation. The head support comprises cheek protection pads arranged on the left side and the right side of the head respectively and an afterbrain protection pad connected with the lower portions of the left cheek protection pad and the right cheek protection pad jointly. A supporting frame is fixed outside the cheek protection pad and the afterbrain protection pad, a height adjusting device is vertically connected to the lower portion of the supporting frame, a fork frame is fixed to the bottom of the height adjusting device, and the head support is installed on an operating bed through the fork frame. The shape of the cheek protection pad is improved, the head of a patient is wrapped and fixed from the side face of the patient, and auricle spaces are reserved to prevent auricles from being extruded. The air cushions are arranged at the positions, corresponding to the frontal bone and the mandible, of the cheek protection pad, protruding bones of the face can be clamped and fixed, the situation that the head can slightly move due to clamping of soft tissue is avoided, the forehead bandage and the jaw bandage are matched to fix the whole head of the patient, and the patient can be limited to rotate, tilt, pitch and other actions.

To easily design and manufacture an optimum oval cavity device for obstructive sleep apnea treatment suitable for the skeleton of each patient.SOLUTION: A method for designing an oral cavity device for obstructive sleep apnea treatment on a computer from three-dimensional shape data on a patient oral cavity defined in a three-dimensional coordinate space includes: a step for acquiring the upper jaw shape data UJ and the lower jaw shape data LJ of a patient; a step for acquiring occlusion data BTS on the lower jaw initial position in the state that the lower jaw is opened from the central occlusion point; a step for acquiring occlusion data BTE on the lower jaw maximum protraction position in the state that the lower jaw is moved forward to the maximum while it is kept opened; and a step for designing a plurality of oral cavity devices in which the positions of the lower jaw with respect to the upper jaw are all different from the upper jaw shape data UJ, the lower jaw shape data LJ, the occlusion data BTS, and the occlusion data BTE.SELECTED DRAWING: Figure 10a1

The invention discloses a preparation method of a 3D printing PEEK network stent for repairing large-scale defects of lower jawbone, and belongs to the field of biomedical engineering and mouth rehabilitation, and the preparation method comprises the following steps: reversely deducing the elastic modulus required by the stent in a specific area according to local stress distribution by introducing a mechanical calculation formula, further optimizing the microstructure of the stent, and obtaining the 3D printing PEEK network stent for repairing the large-scale defects of the lower jawbone. And the stent can dynamically meet the growth requirement of bone tissues in the whole repair process, so that the regeneration of endogenous bones and blood vessels is effectively promoted.

Apparatus and method for installing a dental prosthesis to maxillary or mandibular jawbone of a patient are shown and described. The apparatus and method include a fixation base for providing an attachment surface and an abutment guide attachable to said fixation base in a position wherein the abutment guide is oriented to receive abutments and guide the abutments for placement on the implants. The abutment guide has at least one peg that is designed to be scannable by an intraoral scanner and is designed as a positioning structure that allows a dental prosthesis to be releasably attached to the abutment guide in a specific position.