164 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.

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 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.

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.

The method for creating a digital 3D model of a patient's dentition according to the present invention comprises, in a computing unit, generating a digital 3D model of a plurality of dentition variations, each of which comprises a combination of a digital 3D model of the patient's upper jaw and a digital 3D model of the patient's lower jaw, the plurality of dentition variations differing from one another in the relative positioning of the upper and lower jaws, respectively: - a digital 3D model of the patient's maxilla is combined with a digital 3D model of the mandible such that the maxilla and mandible rest on top of each other at several contact points without any spatial overlap of parts of the maxilla and mandible; - The contact surfaces between the upper and lower jaws are determined, This results in an optimized denture variation being selected for the 3D model of the denture, taking into account the contact surfaces.

The present invention relates to a condyle positioner device that allows the guided positioning of the mandibular condyles in the glenoid fossa, thereby improving the quality of life of many people.

The invention relates to the field of oral digitization, and provides a three-dimensional form automatic reconstruction method and system for a mandible defect. The method comprises the following steps: importing CBCT image data of a patient with the mandible defect into three-dimensional reconstruction software, and extracting hard tissues of the mandible through threshold segmentation to obtain three-dimensional data of the mandible defect; obtaining structured mandible three-dimensional template data; performing size normalization and initial alignment on the structured mandible three-dimensional template data and the mandible defect three-dimensional data to obtain initial alignment template data; gradually deforming and registering the initial alignment template data to the mandible defect three-dimensional data based on a non-rigid registration algorithm added with symmetry constraint to obtain template deformation registration data; and outputting the template deformation registration data as a mandible defect three-dimensional reconstruction result. According to the method, the automation degree and efficiency of three-dimensional reconstruction of the mandible defect are improved.

1. The name of the product of this design: mandibular prosthesis (PEEK polyetheretherketone). 2. Purpose of the product of this design: to repair mandibular bone defect and mandibular bone surface dysplasia. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design key points: 3D image of component 1.

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

This invention discloses a series of osteotomy guides for condylar osteotomy and their manufacturing method, relating to the field of medical device technology. The manufacturing method includes the following steps: creating a hard plaster dental model; establishing a virtual three-dimensional craniomaxillary model; acquiring virtual dentition data and replacing the dentition data in the three-dimensional model with virtual data; determining the target position of the mandibular bone segment; planning and virtually designing the osteotomy lines for coracoid and condylar resection, and virtually resecting the affected side's coracoid and condylar processes, and virtually designing the affected side's temporomandibular joint reconstruction to obtain a three-dimensional model of the affected side's ascending ramus; drawing the coracoid osteotomy guide; drawing the condylar osteotomy guide based on the mandibular morphology and osteotomy line position; and three-dimensionally printing the guide. By employing the above method, the guide can be fixed using its own shape, eliminating the need for additional fixation measures, reducing the difficulty of the procedure, shortening the operation time, and improving the accuracy of condylar resection; it also reduces the possibility of design errors caused by multi-data matching and fusion during the digital design process.

The invention relates to a computer-implemented method for processing an image of a dentate region of interest of a patient, the method comprising: a) obtaining an image of the jaws of a patient on which a region of interest is defined comprising a dentate sector with one or more teeth to be extracted; b) processing the region of interest in order to predict at least one edentulous sagittal 2D section, referred to as edentulous 2D section, the edentulous 2D section being a sagittal section perpendicular to the occlusion curve representative of a residual bone volume of a bony plate at an extraction site after extraction and healing, the processing implementing at least one model for predicting an edentulous section trained on the basis of pairs of dentate and edentulous 2D sections that are symmetrical with respect to the axis of symmetry passing through the middle of the mandibular symphysis of a reference patient for the lower jaw and by the median axis passing through the nasal spine for the upper jaw.