37 results about "Face bow" patented technology

A facebow which overcomes the adverse effects and limitations of current designs by rotating the maxilla in a downward and forward direction, which assists in correcting anterior open bites. This is accomplished by a design that produces forces above the center of resistance of the maxilla and parallel to the Frankfurt horizontal plane. The extra-oral headgear design is characterized by providing two independent adjustments (forehead width and horizontal / vertical dimensions) that allow the appliance to be customized to each patient. In particular, the two independent adjustments are provided by a fully adjustable forehead pad and bilateral adjustable blocks on opposite sides of the facebow extra-oral frame to provide horizontal and vertical adjustments.

The aim of this face bow and protraction headgear design is to correct the anterior open bite in dentally Class III open bite cases. Patients were selected and full coverage acrylic cap splint-type rapid maxillary expansion appliance was cemented and activated twice a day for 5 days. After sutural separation, newly developed face bow and protraction headgear was worn and 750 g of force was applied. Newly developed appliance consisted of a face bow and forehead pad. The face bow had intraoral and extraoral components and was custom made individually for each patient. The intraoral bow was inserted from the distal openings of the tubes which was soldered to the extraoral face bow. The extraoral face bow was extended backward till the front of the ear then turned upward and ended at the level of the hooks on the forehead pad. In this extraoral appliance design only the forehead was used as anchorage unit. On both sides of the pad, adjustable wire hooks were placed which allowed us to maintain the distance from the forehead pad hooks to the face bow hooks. Heavy elastics were attached in between the hooks of the face bow and the hooks on the forehead pad.

It is intended to provide an occludator whereby joint movements at occlusion being similar to the actual tempromandibular joint movements of an individual patient or ideal movements can be reproduced, and a face bow to be used for the occludator. To achieve this object, an occlusion plane against a standard plane is accurately drawn by using the above face bow F whereby the occlusion plane can be drawn at a high accuracy. A solid model of the tempromandibular joint similar to the tempromandibular joint form of an actual patient is used as the joint unit of the occludator K, while the positional relationship in the body at occlusion is three-dimensionally reproduced in the occludator I with the use of the above-described face bow F. It is also intended to provide an occlusion-confirming system and a tempromandibular joint-reproducing system with the use of an occludator whereby joint movements at occlusion being similar to the actual tempromandibular joint movements of an individual patient or ideal movements can be reproduced. To achieve this object, the tempromandibular joint of the body is photographed with a local X-ray CT device to give three-dimensional image data and then a solid model of the tempromandibular joint is constructed based on the three-dimensional image data. This solid model is employed as the joint unit of the occludator K and the positional relationship in the body at occlusion is three-dimensionally reproduced.

In this invention, a high-accuracy jaw motion tracking system and method using the same are disclosed. The jaw motion tracking system of the invention mainly comprises an eyewear facebow static positioning device, a lower jaw dynamic tracking device and a stereo-vision charge-coupled device (CCD) and can provide information regarding the locations and relative movement of lower and upper jaws. The eyewear facebow static positioning device has several passive and active reflective markers. The lower jaw dynamic tracking device equips with a plural of lightweight light emitting devices. Using OpenCV-based self-developed algorithm and post-iterative compensator, the disclosed system can record the dynamical jaw movement with a high accuracy. The disclosed jaw motion tracking system and related method have minimal occlusal disturbance and provide smooth motion-tracking performance. The disclosed system can be used in clinical dentistry.

The invention discloses a pluggable gothic arch tracing system used for dental restoration and a method thereof. The pluggable gothic arch tracing system comprises an upper jaw arch plate and a lowerjaw arch plate, the upper jaw arch plate is in a U-shaped structure, and a T-shaped upper jaw tracing plate is embedded in an inner side of the upper jaw arch plate; the lower jaw arch plate is in a U-shaped structure, a handle is inserted at a front end of the lower jaw arch plate 3, a T-shaped lower jaw arch plate is embedded in the inner side of the lower jaw arch plate 3, and a tracing needleis connected with the lower jaw arch plate through screw thread. According to the tracing system, a front tooth zone tongue side avoidance groove is arranged at a front end of the upper jaw arch plate, a wax rim space is reserved, and the tracing system is in favor of recording and transferring fullness of a maxillary anterior region through wax addition or reduction during dental restoration forpatient. The handle is a pluggable type, is inserted at a channel section of the lower jaw arch plate while mold taking and facebow using, and the can be removed while the aesthetics information is recorded by wax rim. According to the invention, a fork and a bite silicone rubber are not used for facebow transfer, and an upper lip is not interfered while aesthetics information is transferred.

A digital face bow system for capturing a patient's dento-facial characteristics by acquiring and registering data defining the tilt or slant of the occlusal or incisal plane of a patient's teeth in three planes of space in relation to the cranium, head and / or face. The system includes a substrate adapted to support bite registration material, and a digital multiple axis inclinometer coupled to the substrate for registering the orientation of the occlusal or incisal plane, where the midline of the patient's horizontal-facial plane is registered. An adjustable mounting platform is adapted to receive the substrate and replicate the inclination registered by the digital multiple axis inclinometer.

A dental face bow suitably used for odontotherapy against edentulous jaw disease and multi-tooth coloboma, comprising a base frame having a pair of right and left side-frames along both side parts of the head part of a sufferer and a laterally extending lateral frame connecting the pair of right and left side-frames to each other and a rotating frame rotatably supported on the base frame so as to be moved close to and apart from the face of the sufferer on the inside of the side-frames. A mouthpiece inserted into the oral cavity of the sufferer is fitted to the lateral center part of the rotating frame. Ear pieces locked near the right and left earholes of the sufferer and a reference point indicator indicating the occlusal force concentrated part which is set near the nasion of the sufferer are fitted to the rotating frame.

The invention discloses a positioning device and method for a natural head position of a virtual skull model, and belongs to the technical field of clinical medicines. The positioning device comprises an arc-shaped surface bow, a plurality of electromagnet automatic tracing pens and a plurality of supports; and the arc-shaped surface bow is fixed at the top ends of the multiple supports, the heights of the supports can be adjusted, and the multiple electromagnet automatic tracing pens are uniformly fixed on the arc-shaped surface bow. Before use, the pen points of the automatic electromagnet tracing pens are coated with X-ray developing paste, pen cores are compressed after being powered on, during use, a patient is advised to be adjusted to a natural head position state, the arc-shaped surface bow is adjusted to the height of a lower orbital plane of the patient, and the pen points are one centimeter away from the skin; and the power is cut off, the pen cores are popped out by a spring, the electromagnet automatic tracing pens extend and trace mark points capable of being developed under X rays on the lower part of the orbital of the patient, and natural head position recording is completed. The application of the device for accurately determining the natural head position of the virtual head model provides more accurate and scientific guarantee for determining the natural head position of the virtual head model during preoperative digital design of orthognathic surgery.

The invention discloses a multifunctional final impression device, a using method and a digital complete denture manufacturing method. The multifunctional final impression device comprises an upper jaw base, a lower jaw base, an upper jaw dentition, a lower jaw dentition and an external interface, the bottom of the upper jaw base is provided with an upper jaw dentition interface matched with the upper jaw dentition, and the top of the lower jaw base is provided with a lower jaw dentition interface matched with the lower jaw dentition; a tracing plate connector is arranged at the bottom of theupper jaw base, the upper jaw tracing plate is connected into the tracing plate connector to be fixed to the upper jaw base, and a positioner is installed on the upper jaw tracing plate; a positioningplate interface is formed in the top of the lower jaw base, the lower jaw positioning plate is connected into the positioning plate interface to be fixed with the lower jaw base, a positioning needleis mounted on the lower jaw positioning plate, and the lower jaw base is connected with the positioner through the positioning needle; the external connector is arranged at the front end of the upperjaw base and connected with a handle connecting piece or a face arch connecting piece.

Disclosed is a method for determining the geometrical relationship between a patient's dental structure and a reference feature on the head of the patient, the method including obtaining a first digital representation of a facebow including a fiducial marker, an adjustable pin member attached to the facebow and an attachment section of the facebow for placing the facebow in relation to the reference feature, the attachment section having a geometrical relationship with the fiducial marker; obtaining a second digital representation comprising a part of the patient's dental structure, a part of the pin member, and part of the facebow including the fiducial marker; obtaining information about the placement of the attachment section relative to the reference feature; and determining the geometrical relationship between the patient's dental structure and the reference feature based on the first and second digital representations and the placement of the attachment section.

The invention discloses a manufacturing method of a digital 3D printing soft elastic mouthguard. Step 1: obtaining the relationship between the user's intraoral optical impression and dentition; step 2: obtaining the user's intraoral optical impression and dental The relationship between the columns establishes a digital model; step 3: print the digital model through a 3D printer to obtain a mouthguard. The present invention collects the user's dentition data through high-precision optical impression technology (ie digital oral scanning), realizes the computer simulation of the user's upper and lower jaw opening and closing movement through the electronic facebow and virtual joint frame, and is based on the above two steps Export the digital model of the upper and lower first molars with an appropriate distance, build the mouthguard model in industrial-grade CAD software, and finally use biocompatible soft elastic 3D printing materials and high-precision 3D printing technology to materialize the mouthguard .

The intraoral disposable gothic arch tracer of the present invention has simple structure, low cost, and one-time use reduces the chance of clinical cross-infection, and is convenient for popularization and use in a wide range of oral clinics; use the arch tracer to determine the median position of edentulous patients The clinical operation process is simple, the vertical height can be adjusted modularly, and the accuracy is 0.5mm, which fully meets the clinical needs and is convenient for clinical operation. The three contour tracing needles arranged in a triangle ensure the balance and stability of the tracing board, and finally guarantee It ensures the stability of the median relationship and overcomes the slight deviation of the upper and lower jaw positions that may exist in the conventional Gothic arch monographic needle fixation. The upper jaw is pre-finished with wax embankments to facilitate the transfer of the facebow to the upper joint frame and the accurate position of the artificial teeth arrangement.

The objective of the present invention is to provide a zero moment adjuster capable of reproducing simply and accurately an occlusal curve specific to a patient, within the oral cavity, and which is more convenient to use. The zero moment adjuster according to the present invention is provided with: a base frame 11; face-bow attachment portions 12A, 12B; a face-bow 13; a mouthpiece 14; a securingmeans 15 which can be attached to and removed from one of the face-bow attachment portions 12A to secure the face-bow 13 to the face-bow attachment portions 12A, 12B with a prescribed attachment angleTheta 3; an earpiece attachment portion 16; an earpiece 17; a pad portion 18; and a reference point indicating tool 19 for indicating an occlusal force concentration part N. The mouthpiece 14 is formed in the shape of a curved surface along an occlusal spherical surface centered around a point on an occlusal line which passes through the occlusal force concentration part N and is parallel to sideframes 11a, 11b, and the prescribed attachment angle Theta 3 is an angle designed such that the mouthpiece 14 is located on an occlusal curved surface C in the oral cavity.

The invention discloses a temporomandibular joint condyle development inducer and a preparation method thereof, which obtains the patient's median position, condyle guide, and cutting guide through an electronic face bow; according to the median relationship position, condyle guide, and cutting guide Set up a virtual articulator in the three-dimensional modeling software; design the first accessory condyle development inducer according to the virtual articulator; obtain the patient's bilateral mandibular ramus height difference and the generation of mandibular tubercle sag Compensation amount; adjust the thickness of the posterior tooth area of ​​the first accessory condyle development inducer according to the compensation amount of the height difference of the bilateral mandibular ramus and the sagging of the mandibular tuberosity, and obtain the Nth accessory condyle development induction In order to realize the early non-invasive intervention of condylar hypertrophy, inhibit the excessive development of the hypertrophic side, promote the normal development of the healthy side, and induce the symmetrical development of bilateral condyles, which is conducive to clinical promotion and has an ideal effect.