14 results about "Missing tooth" patented technology

The present application relates to the technical field of image data processing, in particular to a missing tooth shape intelligent reconstruction method based on contralateral tooth mirror image transformation. According to the patient's masseter axial ultrasound image and temporal muscle axial ultrasound image, the robustness of each side of the masticatory muscle of the patient's both cheeks is determined; the average wear degree of each side of the patient's both cheeks is measured, and then a regression equation of the average wear degree and the robustness is constructed; the coordination coefficient between the missing tooth side and the contralateral side of the patient is determined by using the regression equation, and then it is judged whether the contralateral homonym tooth of the missing tooth needs to be corrected; if correction is needed, the wear degree correction coefficient of the contralateral homonym tooth is constructed, and then the contralateral homonym tooth of the missing tooth is corrected, and the missing tooth shape reconstruction is carried out based on the corrected contralateral homonym tooth. The present application corrects the contralateral homonym tooth of the missing tooth, so that the missing tooth shape reconstruction is more consistent with the dynamic coordination of masticatory movement.

The application provides a three-dimensional implant crown intelligent selection and generation method based on U-Net, comprising the following steps: converting a three-dimensional tooth model in STL format into a high-resolution two-dimensional projection image; taking a U-Net network structure with VGG16 as a backbone network, combining a bar pooling module, and designing a neural network model for accurately capturing tooth sequential arrangement features; training the neural network model by using an adaptive learning rate adjustment strategy and a cosine annealing learning rate scheduling strategy, and performing semantic segmentation on the two-dimensional projection image to obtain a 2D tooth classification result image; identifying missing tooth labels based on the 2D tooth classification result image, calculating the center points of left and right adjacent teeth of the missing tooth, calculating the center position coordinates of the missing tooth in the 2D image through the center points of the left and right adjacent teeth, and mapping the center position coordinates to a three-dimensional space to obtain three-dimensional center coordinates of the missing tooth; and moving the template tooth center point to the three-dimensional center coordinates of the missing tooth to generate a three-dimensional crown model that matches the missing tooth position.

This invention belongs to the field of dental medical technology, specifically relating to an automatic positioning method, electronic device, and storage medium for dental template teeth. The method includes: acquiring a patient's dental arch model, the cervical margin of a restoration, and a template tooth model; determining the dimensional characteristics of the template tooth; performing preliminary overall matching of the template tooth; extracting the tooth portions from the dental arch and fitting a dental arch curve; calibrating the position and size of the template tooth based on the dental arch curve, including determining the target position and orientation of the restoration based on the cervical margin and the dental arch curve for restored teeth, and determining and locating the missing tooth based on the projection of adjacent restorations, and scaling it according to the morphology of the cervical margin or the arc length of the missing tooth interval. This invention achieves precise initial positioning and adaptation of the template tooth through an automated algorithm, solving the problems of cumbersome and inefficient manual positioning in existing technologies.

This application provides a protective dental crown, comprising: a dental crown; and a retaining ring detachably connected to the side of the dental crown. The dental crown is fitted onto a target tooth for protecting missing teeth in elderly comatose patients. The retaining ring is fitted onto teeth surrounding the target tooth to secure the dental crown. Applied to comatose elderly patients, the crown covers the missing tooth, and then a retaining ring of appropriate size is fitted onto the patient's healthy teeth to secure the crown. This isolates the defective tooth, preventing contact with oral tissues and complications such as oral ulcers. The solution is simple to operate, convenient to use, and inexpensive, facilitating its widespread adoption.

One embodiment of the present invention provides an apparatus and method for accurately segmenting a tooth image using artificial intelligence technology in a tooth diagnostic device. An apparatus according to one embodiment of the present invention includes: a database storing a hybrid data set comprising a plurality of disclosed tooth images and a plurality of undisclosed tooth images; and a control unit that generates a tooth segmentation image by segmenting at least one tooth in one tooth image included in the hybrid data set through a Seg-CSAB segmentation model, and generates a tooth analysis image by marking the location of the missing tooth on the tooth segmentation image through a missing tooth location prediction module.

The application discloses a kind of digital production methods of activity instant restoration, it is related to denture repair technical field, to solve the technical problem that current activity instant restoration processing and production highly depend on personnel skills, process is complex and low in efficiency and precision is difficult to control, the method integrates intraoral scanning, CAD computer aided design, CAM cutting processing and 3D printing technology, carries exclusive algorithm and corresponding formula such as oral three-dimensional data reconstruction algorithm, base plate adaptive design algorithm, CAM tool path intelligent optimization algorithm, forms the whole process closed loop of "data acquisition-design optimization-fitting verification-precision cutting-finished product detection";The application realizes restoration full digitalization, intelligent preparation, improves processing precision and efficiency, reduces artificial dependence, adapts to different missing tooth scene, and can be widely applied to oral instant repair field.

The utility model discloses a kind of dentition loss supports, including base, clasp and false tooth;False tooth is located on base, base is used to wrap alveolus at missing tooth place, and base is multiple, and elastic rod for conforming to inner wall of alveolus is connected between any two adjacent bases, and base is equipped with clasp for wrapping and fixed to the outer periphery of abutment tooth;The outer edge of base is equipped with sealing rubber ring for conforming to alveolus.The utility model, by the design of elastic rod and clasp, let user be more stable, comfortable when wearing the dentition loss support, adapt to the small deformation of user's oral cavity;And base outer edge is equipped with sealing rubber ring, can reduce food residue, saliva into alveolus.

The application discloses a kind of implant navigation methods, systems, electronic equipment and storage medium for oral medicine image AI maxillofacial reconstruction, belong to oral medicine image processing and intelligent implant planning field.The method obtains oral CBCT data, after pre-processing, automatic segmentation is carried out to dentition, maxilla, mandible, inferior alveolar nerve canal and maxillary sinus and other key anatomical structures, and three-dimensional reconstruction is carried out;Determine the candidate implant region based on the spatial relationship of dangerous anatomical structure and edentulous area, optimize the position, angle and length of implant under the preset safety constraint, and then generate implant guide plate design parameters and three-dimensional model.The scheme can improve the efficiency of preoperative planning of oral implantation, the accuracy of key structure identification and clinical safety.

The utility model discloses a kind of transparent mouthguard type push missing tooth side molar distal upright device, which is convenient and comfortable, comprising a transparent mouthguard and a double-curved tongue spring that covers all teeth in the interproximal space. One end of the double-curved tongue spring is fixed to one end of the transparent mouthguard near the interproximal space, and the other end of the double-curved tongue spring is a pressure application end. The transparent mouthguard covers the clinical crown, and while ensuring aesthetics and comfort, the force transmission is more direct, the fixation force is more stable, and the anchorage control is more controllable. The double-curved tongue spring achieves precise and efficient molar movement through a local force application mechanism, significantly shortening the time required for interproximal space expansion before implantation. The device uses digital oral scanning combined with 3D printing technology to quickly produce the orthodontic device. Doctors do not need to perform complex operations to customize the device. It is suitable for patients who do not need orthodontic treatment or cannot accept full orthodontic treatment. The transparent mouthguard in the device uses domestic hot plastic film and domestic orthodontic materials, which is cost-effective and has a short preparation period.

This invention proposes a method for fabricating an immediate digital implant guide, comprising: S1: acquiring a patient's dental impression and taking CBCT images; S2: identifying the positioning anchor point information on the CBCT image, registering it with the positioning anchor point coordinates of the dental model tray, placing the simulated implant according to the missing tooth location, and obtaining its spatial coordinate position information; S3: pouring quick-setting plaster to fabricate a plaster positive mold; S4: fixing the plaster positive mold onto a guide ring placement device, calculating the movement parameters of each axis of the guide ring placement device, and operating the guide ring placement device to move the guide pin and plaster positive mold to the required positions and angles respectively; S5: curing the guide ring onto the surface of the plaster positive mold using light curing, removing the guide pin, fabricating a film on the surface of the plaster positive mold, shaping and trimming, polishing, and sterilizing before use. This method improves the implantation accuracy and is simple, fast, economical, and practical. This invention also proposes a corresponding coordinate transformation mold and guide ring placement device.

Methods and apparatus for analyzing a patient's dental arch to generate a treatment plan for a dentition are provided herein. Methods and apparatus for analyzing a patient's dental arch when the patient is missing one or more teeth are described in particular. Methods and apparatus are provided to correctly number the teeth of a patient's dental arch after a dental scan, including automatically detecting missing teeth and estimating the size of the missing teeth after a dental scan. Methods and apparatus are provided to perform an analysis of a patient's dental arch using the estimated size of the missing teeth. Methods and apparatus for designing and manufacturing an appliance are also provided.

Horse bridge solution The invention relates to a horse bridge intended to replace one or even two missing teeth, characterized in that it is made of silicone and resin, the bridge being composed of four pieces, the first piece being made of ductile silicone, the second and third pieces being made of resin and fitting onto the silicone, the fourth piece being made of resin, the resin constituting the fourth piece being different from the resin constituting the second and third pieces, the thickness of the fourth piece being able to be 0.5 mm, 1 mm, 1.5 mm or 2 mm.

This utility model relates to the field of dental technology. An occlusal reconstruction brace with a pressure post and spring retainer includes a first brace and a second brace that cooperate with each other. The first brace has a pressure post protruding towards the second brace, and the second brace has a clearance hole for the pressure post, which is used to allow elongated teeth to protrude. A spring retainer is symmetrically mounted on the first brace adjacent to the pressure post, allowing for the detachable installation of a spring. The spring retainer is used to detachably connect the spring, which is used to clamp between the tilted tooth and the spring retainer. The combination of the pressure post and spring retainer in this utility model uses the spring's elasticity to generate a straightening force on the tilted teeth on both sides of the missing tooth, and the pressure post applies longitudinal force to the elongated tooth at the site of the missing tooth, thus depressing the elongated tooth.