210 results about "Mandible/Mandibular" patented technology

The invention discloses a mandibular neural tube automatic segmentation method based on multi-view guidance, and relates to the technical field of oral medical treatment. Comprising the following steps: collecting original oral cavity CBCT image data, and performing preprocessing; sending the preprocessed image data into a mandible segmentation network, and segmenting a mandible region containing a mandible neural tube; a contrast enhancement technology is adopted for the segmented mandible area; projecting the processed mandible image along three orthogonal tangent planes of a coronal plane, a sagittal plane and a cross section; performing key point detection on the mandibular neural tubes on the three projection planes by using the trained key point detection network to obtain shape information of the mandibular neural tubes; and the features are combined with texture direction features to be input into a three-dimensional CBCT mandibular neural tube segmentation network, and accurate 3D segmentation is carried out. Two-dimensional missing space information is avoided, and mandibular neural tube segmentation is more complete and accurate.

The invention discloses an artificial intelligence-assisted standard artificial temporomandibular joint automatic placement method. The method comprises the following steps: training a three-dimensional reconstruction model used for extracting a mandible and zygomatic bone zygomatic arch joint prosthesis placement area; based on an improved 3D U-Net neural network, carrying out segmentation extraction on the interested areas of the glenoid fossa and the mandibular branch, and obtaining a space geometric structure for prosthesis installation; the method comprises the following steps: extracting outer bone surface point cloud data of a zygomatic arch and a mandibular ramus on the basis of a space geometric structure of prosthesis installation, identifying anatomical key points, and generating a standard prosthesis fitting surface through geometric fitting and constrained optimization; determining the relative position relation between the maxillary joint fossa prosthesis and the mandibular branch prosthesis, and determining the installation direction, the hole position definition and the assembly reference point; and determining a contact area, a posture direction and a placement position of the prosthesis, and completing three-dimensional positioning and posture matching of the prosthesis in the patient model as a surgical planning scheme.

A dental appliance apparatus is disclosed herein. In various aspects, the dental appliance may include a body removably attachable to one or more teeth selected from premolars and molars, and a flange extending forth from lingual portions of the body to contact a tongue at one or more locations proximate the premolars and the molars in order to cause a contraction of the genioglossus that positions the tongue anteriorly and downward toward the mandible by stimulation of the hypoglossal nerve. The dental appliance may include a connector connected to the body. The connector may define an anterior flange to stimulate the hypoglossal nerve proximate a tip of the tongue in order to cause contraction of the genioglossus to position the tongue anteriorly and downward toward the mandible.

A firearm stock adjustment device for attachment to a firearm stock provides for a consistent, stable cheek weld and improves speed and consistency for an aimed shot. The device includes a thickness that fills and empty space between the maxilla and the front of the mandible with the firearm stock during a cheek weld and provides rest to the zygomatic arch and bone and pushes the firearm outward away from the jaw and tilts the head more vertically. This provides a quick and consistent sighting with the firearm when the cheek weld is performed and reperformed. The device is disposable, lightweight, cost effective, and comfortable and is universally attachable to common rifle stocks.

The artificial jawbone comprises a fixing frame, a connecting piece and a mandible support, the connecting piece is arranged on the fixing frame, the upper end of the mandible support is connected with the fixing frame through the connecting piece, the mandible support comprises a mandible branch and a mandible body, and a long hole extending in the front-back direction is formed in the connecting piece; a connecting column is arranged at the upper end of the lower jaw branch part and penetrates through the long hole, the upper end of the lower jaw branch part can rotate around the connecting column, the connecting column can slide in the long hole in the length direction of the long hole and can slide in the long hole in the axial direction of the connecting column, and the near-middle end of the connecting column is connected with the upper end of the lower jaw branch part; a limiting block is arranged at the far middle end of the connecting column. The artificial jaw bone has the advantages that the artificial jaw bone can simulate lifting, descending, advancing, retreating and left-right lateral movement of the lower jaw, the function recovery effect is good, connection is stable, and dislocation is not prone to occurring.

The embodiment of the invention relates to the technical field of medical instruments, and discloses a mandibular movement modeling method, electronic equipment and a storable storage.The mandibular movement modeling method comprises the steps that image data pictures of the mandible of a patient at different positions are received, and a three-dimensional maxillary model and a mandibular model are digitized; the image data picture at least can display a part of maxillary dentition and a part of mandibular dentition; according to the relative position of the maxillary dentition and the mandibular dentition in the image data picture, determining the spatial position and posture of the digital three-dimensional mandibular model relative to the maxillary model; wherein the image data pictures of different positions of the mandible correspondingly determine the spatial position and posture of one mandible model; and analyzing each spatial position and posture of the determined mandibular model to obtain a movement track of the mandibular model relative to the maxillary model, thereby solving the problem of automatically establishing the mandibular dynamic movement model conforming to the actual condition of the patient.

The invention discloses a manufacturing and application method of a lower jawbone sagittal splitting deboning and nerve protection guide plate, and belongs to the field of medical instruments in surgical operations. The manufacturing method comprises the following steps: S01, acquiring CT data of the lower jawbone of a patient; s02, importing the CT data of the lower jawbone of the patient into three-dimensional software to segment and reconstruct a model of the lower jawbone and the inferior alveolar nerve of the patient; s03, on the segmented and reconstructed mandible model, simulating a sagittal splitting operation of the mandible; s04, according to the simulated osteotomy line, designing a boning and nerve protection guide plate matched with the mandible model; and S05, the boneless and nerve protection guide plate is manufactured through 3D printing. Compared with the prior art, the deboning and nerve protection guide plate matched with the lower jawbone of the patient is customized in a personalized mode through the CT image digital design and the 3D printing technology, and the deboning position of the patient is accurately positioned; and meanwhile, a hand doctor can be helped to control the position of the inferior alveolar nerve, and the inferior alveolar nerve is prevented from being injured during boning.

The novel digital mandibular advancement appliance parameter design method comprises the following steps: step 1, constructing a three-dimensional finite element model comprising upper and lower jawbones, dentition, periodontal ligament, temporal-mandibular joints and a mandibular advancement appliance based on the three-dimensional finite element model; adjusting the boundary of the three-dimensional finite element model through the mandible kinematics parameters to form a simulation boundary; 2, constructing a multi-parameter collaborative prediction model based on the obtained stress data under different combinations of the mandibular protraction amount and the vertical opening amount; based on the stress data, constructing a three-dimensional stress distribution cloud picture by adopting three-dimensional simulation interaction software; 3, inputting the simulation boundary into the multi-parameter collaborative prediction model, and outputting risk early warning information; and 4, determining design parameters of the mandibular advancement appliance based on the three-dimensional stress distribution cloud picture and the risk early warning information. According to the method, the parameters of the appliance are customized, and the designed forward movement amount and the opening amount of the appliance better conform to personal characteristics.

The present invention is oral device that inhibits mastication and ingestion of solid food while minimizing intrusiveness and discomfort in other oral activities. This device is ideal for individuals following an all-liquid diet without relying on willpower alone. The oral device allows a full range of motion of the jaw and the wearer keeps the ability to open and close the mouth, allowing all oral functions other than chewing and swallowing solid food. In various embodiments of the invention, the oral device comprises a set of retainers worn over teeth or retainer bars bonded to, or integrated as part of the retainers. A set of flexible mastication barriers coupled to the retainers or retainer bars and extending from mandible to the maxilla on the lingual side of the mouth inhibit the movement of solid food to the occlusal surfaces of the posterior teeth for chewing. An artificial intelligence platform is implemented to improve fabrication of the oral device and predict and eliminate undercuts in the retainers or retainer bars.

The utility model relates to a headgear muscle excitation appliance with a lower lip shield, and belongs to the technical field of orthodontic appliances. In order to solve the problems that the existing headgear muscle excitation appliance cannot stimulate the development of the lower jawbone and cannot eliminate the tension effect of chin muscles, the headgear muscle excitation appliance is provided with a muscle excitation appliance body, the front end of the muscle excitation appliance body is provided with an upper jaw labial arch and a lower lip blocking part, and the upper jaw labial arch is clamped at the gingiva of two upper canine teeth of a patient; the lower lip blocking part is located on the oral vestibule of the lower lip of the patient, the lower lip of the patient is guided and supported outwards through the arch-shaped supporting piece and the two blocking pieces, and the tension effect of chin muscles is eliminated. According to the structure, the direct acting force of the lower lip on the teeth can be effectively weakened, the posture of the lower lip is improved, normal development of the lower jawbone is promoted, and great application value and popularization prospects are achieved clinically.

The invention discloses a method and a device for determining a movement track of a mandible and electronic equipment. The method comprises the steps that an auxiliary part, fixed to the gingiva, in the mouth of a target object is scanned through intraoral scanning equipment, intraoral scanning data are obtained, and the auxiliary part is provided with a feature structural part; acquiring mark point track data corresponding to the mark points on the feature structural component through face scanning equipment; and according to the mark point trajectory data and the intraoral scanning data, determining the motion trajectory of the mandible of the target object. The technical problem that mandible movement measurement in the prior art is not suitable for edentulous jaw patients is solved.

The utility model discloses a mandible isolation tongue block structure, which comprises two belt rings respectively sleeved on first molars on two sides of a mandible; the connecting rod is arranged on the tongue side, the two ends of the connecting rod are connected with the two bands respectively, and the connecting rod has a radian bent in the arrangement direction of the teeth of the lower jaw; the tongue block is arranged on the tongue side, and the tongue block is vertically arranged on the connecting rod and used for isolating tongue muscles. The mandible isolation tongue blocking structure designed by the utility model is an appliance capable of relieving the thrust of tongue muscles to the mandible. The tongue blocking structure for isolating the lower jaw is convenient and fast to use, can effectively eliminate the cause of the reverse jaw problem caused by the low tongue position, is very suitable for being used by children with poor habits of the low tongue position, has high clinical value, and is suitable for clinical popularization and use.

The invention discloses a mandible fracture detection system based on wavelet transform feature enhancement and multi-scale attention focusing. A constructed mandible fracture detection model is adopted; the mandible fracture detection model comprises a backbone network, a feature fusion network and a detection head part; the backbone network is responsible for efficiently extracting low-level features in an image, then performing further feature extraction, obtaining global and local feature information through a C3K2WT module, further enhancing detail expression of a mandible fracture line, and enhancing spatial attention of feature mapping through a C2PSAEMA module. The feature fusion network aggregates feature maps from different resolutions and transmits the feature maps to the detection head, and the C3K2WT module is utilized again to improve the ability of the model to extract the most important part of the image; and combining prediction results generated by the three detection heads through non-maximum suppression to obtain a final result, and accurately positioning the position of the mandible fracture line. By utilizing the method, the detection precision of the mandible fracture line and the robustness of the model can be remarkably improved.

A kit and a method are described for fixing a fixable orthodontic implant device to the palatal and / or mandibular bones of a patient, the orthodontic implant device comprising a frame (1) superimposable on an external surface of the palate (P) and / or mandible of the patient, the frame (1) having at least one fixing hole (2) extending through a section of the frame (1), and being sized and shaped to receive a bone mini-screw (3) and a drill guide (4) therein, the drill guide (4) being sized and shaped to receive the bone mini-screw (3) therein, the drill guide (4) being removably fastened to the frame (1) via the fixing hole (2) when the drill guide (4) is fastened to the frame (1). The bone mini-screw (3) is in communication with the respective fixing hole (2) via the drill guide (4).

The present invention discloses an auxiliary evaluation method and device for a damaged mandible, comprising an image acquisition module for acquiring CT images of the damaged mandible; a mandibular fracture model construction module for constructing a mandibular fracture model based on the CT images; a numerical analysis model construction module for constructing a numerical analysis model based on the mandibular fracture model; a mathematical model construction module for the damaged mandible for constructing a mathematical model of the fixed position and angle of the titanium plate after mandibular fracture repair based on the numerical analysis model; and an evaluation module for evaluating the quality of mandibular fracture repair based on the mathematical model. The present invention can quickly construct a model of a damaged mandibular fracture, and the constructed evaluation model is accurate. The obtained titanium plate is installed in a reasonable and reliable position and angle on the mandible, avoiding stress concentration and secondary human damage after installation.

The invention relates to the technical field of medical instruments, and provides a mandibular protraction position multidirectional adjustment oral cavity supporting mechanism which comprises a head hoop body worn on the head, two first fixing frames symmetrically installed on the head hoop body, metal arms inserted into the inner sides of the first fixing frames and a plurality of insertion holes formed in the metal arms. The device is worn on the head of a patient through the head band main body, and then the height and the angle of the metal arm upper and lower jaw supporting frame can be adjusted under the cooperation of the fixing assembly, the inserting holes, the T-shaped rotary knob and the positioning mechanism. Meanwhile, under the cooperation of the clamping mechanism, the elastic clamp and the dilator, the mouth of the patient can be dilated, then the airway of the patient can be kept smooth, the situation that an anesthetist manually lifts the lower jaw for a long time is avoided, the airway is rapidly established in first aid, and the suffocation risk is reduced.

The utility model discloses a complete denture teaching aid. An upper jaw bone and a zygomatic arch are integrally connected, and the upper jaw bone and a lower jaw bone are oppositely arranged at intervals; the upper false tooth is detachably connected with the upper jawbone, and the lower false tooth is detachably connected with the lower jawbone; the two telescopic pieces are fixedly connected to the side portion of the zygomatic arch and the side portion of the mandible respectively, and the fixed ends of the two telescopic pieces are connected to the periphery of the outer side of the zygomatic arch and the top of the outer side of the mandible respectively. The adjusting parts are arranged among the corresponding telescopic parts, the zygomatic arch and the mandible in a suspended mode, and the adjusting parts are fixedly connected with the movable ends of the corresponding telescopic parts respectively. The upper jawbone is integrally connected with the zygomatic arch and is arranged opposite to the lower jawbone at an interval, and the upper jawbone and the lower jawbone in a real oral cavity are simulated. The upper false tooth and the lower false tooth are detachably connected to the upper jawbone and the lower jawbone respectively and are used for simulating and replacing missing teeth. The stretching length and angle of the telescopic piece are controlled through the adjusting piece, and the relative distance and position relation between the maxilla and the mandible are adjusted, so that the alignment process of the maxilla and the mandible is displayed in real time.

This application discloses a method, device, and medium for measuring the three-dimensional morphology of the temporomandibular joint (TMJ), relating to the field of image processing. The method comprises: inputting target TMJ CBCT data into a mandibular three-dimensional segmentation model to obtain a mandibular three-dimensional segmentation result; determining an image of the TMJ center region based on the mandibular three-dimensional segmentation result and the target TMJ CBCT data; inputting the TMJ center region image into a condyle and fossa two-dimensional segmentation model to obtain two-dimensional segmentation results of the condyle and fossa regions; and calculating condyle morphological information, fossa morphological information, and position information of the condyle in the fossa based on the two-dimensional segmentation results of the condyle and fossa regions; wherein the mandibular three-dimensional segmentation model and the condyle and fossa two-dimensional segmentation model are both obtained by training a deep learning network. This application can achieve automatic and accurate measurement of the three-dimensional morphology and position of the condyle and fossa of the TMJ.

A bruxism training device is disclosed that is capable of detecting bruxism events (e.g., jaw clenching and teeth grinding) via external electromyography (EMG). The training device is shaped to be easily placed in a proper location and proper orientation over a masseter muscle of a user. A locator region is provided to facilitate easy locating of a reference electrode over the gonial angle of the mandible, while an alignment edge of the training device is provided to facilitate easy locating of end electrodes adjacent an end of the masseter muscle coupled to the mandible. With the locator region and alignment edge in place, an array of mid electrodes is automatically positioned over a bulk of the masseter muscle, allowing useful EMG measurement to be acquired of masseter activation.

The invention discloses a mandibular canal segmentation method and system, electronic equipment and a storage medium. The method comprises the following steps: acquiring an oral maxillofacial region image; cutting the oral maxillofacial region image to obtain a plurality of local images of the mandible; inputting the plurality of local images into a mandibular canal segmentation model, and outputting to obtain a segmentation result; the mandibular canal segmentation model comprises an encoder, a decoder and a feature fusion module, three two-dimensional convolution branches are configured on three orthogonal projection planes in the feature fusion module, and each two-dimensional convolution branch can obtain boundary information, center trend and local bending features of the mandibular canal on different orthogonal planes and fuse the boundary information, the center trend and the local bending features to obtain multi-view features; and fusing the multi-view feature and the local texture feature to obtain an enhanced feature, fusing the local texture feature and the enhanced feature by a decoder, and outputting to obtain a segmentation result. And through the feature fusion module, comprehensive coverage of multi-view geometric features is realized, and the problems of segmentation fracture and boundary blur caused by single feature extraction are effectively avoided.

A composition tor use in treating a dental implant. Tire composition comprises a porous biodegradable polymer scaffold and a dicalciurn phosphate dihydrate (DCPD) coating within pores of the scaffold.

The application discloses a kind of digital lower jaw accurate positioning and customized removable denture preparation integrated method, it is related to stomatology technical field. Including: initial diagnosis data collection;Digital modeling and jaw position adjustment;Design treatment jaw position guide plate;Try on jaw position guide plate, check lower jaw movement, confirm facial form beautiful, prepare silicon rubber final impression, record the actual occlusion relationship of patient;Based on occlusion relationship preparation-final denture, the obtained-final denture is carried out clinical evaluation.The application is for complex oral conditions, such as occlusion disorder, temporomandibular joint disorder patient, by obtaining personalized fitting removable denture, adjusting the relative position relationship of upper and lower jaw bones, relieving abnormal stress of joint, assisting the stability and recovery of temporomandibular joint, realizing the unity of stability and aesthetic effect of stomatognathic system after repair.

The utility model discloses a lower jawbone reduction cutting component, which relates to the field of maxillofacial reshaping appliances and comprises a filing board, the filing board is an arc-shaped extending board body, the arc-shaped concave surface of the filing board is provided with a main filing surface and an auxiliary filing surface, the arc-shaped convex surface of the filing board is provided with an arc-shaped convex part, the surface of the convex part is provided with an auxiliary filing surface, and the grab handle is connected with the filing board. The arc-shaped main filing face is arranged on the concave face of the arc-shaped filing plate, the main filing face and the bone section of the mandibular angle have the matched curvature, the grinding combination face is more perfect, and therefore the grinding precision is improved, and the bone section line of the mandibular angle is more attached to the preoperative design line.

The present embodiments relate to systems and methods relating to an implant that enables the jaw to be held forward while sleeping that advances the lower jaw without the discomfort provided by other techniques. The implant can be configured to be positioned between the mastoid bone and the mandible bone of a user. The implant may not affect natural jaw movement that can include opening and closing of the jaw but also side-to-side movement.

A ventilation assembly (37) for use in ventilation of a subject using a laryngeal mask (5) comprises a head-wearable harness (39) and a pusher (41). The harness is arrangeable on the subject's head (H) for supporting the pusher to press against the floor of the mouth (15) of the subject (P). The pusher comprises laterally opposite protrusions to displace, in use and operably supported by the harness on the subject (P), soft tissue of the subject at the left and right submandibular triangles (trigonum submandibulare) in cranial direction relative to the mandible (29) of the subject and surrounding tissue of the subject such as the submental triangle (trigonum submentale) for, when the laryngeal mask is installed in the airway of the subject, urging internal soft tissue of the subject against the laryngeal mask in the airway of the subject. Each protrusion or the pusher as a whole is hollow providing a recess for accommodating an operators' finger.

This invention relates to a markerless real-time registration and tracking method and system for mandibular surgery. The method includes the following steps: the patient performs multiple opening and closing movements of the upper and lower jaws while the robotic arm is fixed, and the system synchronously records the changes in the angles of each joint of the robotic arm; based on the forward kinematics of the robotic arm, the continuous motion trajectory of the distal end of the jaw in space is calculated to form an actual jawbone trajectory point cloud; a preoperative image model is formed using the actual jawbone trajectory point cloud, a simulated jawbone trajectory is constructed in the preoperative image model, and the actual trajectory is aligned using the ICP registration algorithm to achieve automatic registration; the system establishes a mapping between angle changes and the spatial posture of the jawbone to achieve dynamic tracking and visual navigation during surgery. This invention solves the problems of large errors, high complexity, many limitations, and low efficiency in preoperative image data registration technology during maxillofacial surgery, avoids the need for preoperative implantation of markers, and achieves high-precision registration, high automation, and strong real-time performance under natural conditions.

An arch bar system for maxillomandibular fixation is disclosed. A contourable, trim-to-fit bar includes a series of elongated oval apertures oriented substantially parallel to the bar axis. The apertures guide wire, coated suture, or other ligatures at varied approach angles, limit vertical clearance to resist slippage, and cooperate with intervening structural columns to distribute loads while the bar is cinched to teeth. Low-profile depending attachment features—cleats and / or J-hooks—project below the lower edge to receive interarch wire loops, guiding elastics, or other connectors. All patient-facing edges and transitions are radiused to minimize gingival and mucosal trauma. Bars may be metal or engineered polymer and segmentable for partial-arch use. Methods include threading ligatures through successive apertures to secure each bar and joining opposing bars at the depending features. Kits include paired bars, ligatures, interarch connectors, and tools.

A mandibular advancement device (MAD) facilitating protrusion, retraction, translation, and rotation of a mandible is provided. The MAD comprises a fit connector, and left and right bite tray assemblies. Each bite tray assembly, mirror images of each other, comprise top and bottom bite plates, hinge plate, pin, and circumduction anchor rod. The top and bottom bite plates cradle upper and lower teeth respectively, while the hinge plate facilitates mouth opening and closing via a pin connection to the top bite plate and secure yet mobile connections to the bottom bite plate via the circumduction anchor rod. This rod, insertable into elliptical cylinder holes and semi-cylindrical depressions, allows lateral translation and rotation between connected parts. The hinge plate incorporates a flexible member for mandible protrusion and retraction, teeth-like structures to maintain minimum advancement, and a tension prong for stable fit. Adjustable-length circumduction anchor rods cater to varying mandibular advancement needs.

The present invention discloses an individualized osteotomy and repositioning surgical guide system for mandibular body osteotomy, including an individualized osteotomy guide and a bone plate; the osteotomy guide can be fitted with the front of the mandible and used for osteotomy of the mandibular body, and the bone plate can be fitted with the mandibular body after osteotomy and used to locate and fix the bone end. The osteotomy guide is an integrated structure, including a first guide plate, a second guide plate, and a third guide plate covering the front of the mandible. The bone plate is a split structure, including a first bone plate and a second bone plate; the first bone plate and the second bone plate each include an integrated bone plate body, the bone plate body is rectangular as a whole, and a first extension portion and a second extension portion are also provided thereon. The present invention also discloses a preparation method of the above-mentioned surgical guide system and its application in mandibular deformity correction.

The invention relates to the technical field of medical data processing, and discloses a three-dimensional lower jawbone mark point determination method, system and device based on a thermal point cloud network and a medium, and the method comprises the steps: calculating the Euclidean distance between a three-dimensional lower jawbone point cloud data midpoint and a three-dimensional lower jawbone mark point, obtaining the Gaussian distribution, and determining the three-dimensional lower jawbone mark point. The relevancy between the points in the three-dimensional lower jawbone point cloud data and the three-dimensional lower jawbone mark points is represented, and better guidance is provided for training of a lower jawbone mark point prediction model. The mandible mark point prediction model performs local feature extraction of three-dimensional mandible point cloud data through a local feature extraction module based on a PointNet + + architecture by using a thermodynamic point cloud network, performs global feature extraction in combination with a global feature extraction module based on the PointNet architecture, and outputs a three-dimensional thermodynamic diagram and a coordinate deviation value through feature fusion and decoding; the three-dimensional lower jawbone mark point can be accurately predicted, and reliable data support is provided for medical research.