121 results about "Mandible/Mandibular" patented technology

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 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 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 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.

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.

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.

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.

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 provides a vertical control type silica gel jaw pad appliance for high-angle cases, which comprises an appliance body, a tooth accommodating groove and a jaw pad structure are arranged on the appliance body, and a wedge-shaped structure is arranged at the tail end part of the jaw pad structure; the wedge-shaped structure is provided with a guide surface, and the guide surface is an inclined surface which is formed when the tooth positioning groove is in an occlusion state and is formed by taking an occlusal surface as a base surface and is inclined downwards relatively; when teeth make contact with the guide face of the wedge-shaped structure, upward correction force which is provided by the guide face and is close to the rear portion of the oral cavity can be obtained, the correction force can guide maxillary rear teeth to extend in the direction close to the throat, and anterior displacement of the mandible is induced through change of the occlusion relation.

A mandible adjustment device comprises an upper teeth brace and a lower teeth brace wherein the upper teeth brace and the lower teeth brace have an upper teeth accommodation space and a lower teeth accommodation space, respectively: the upper teeth accommodation space and the lower teeth accommodation space are developed according to a user's dental pattern for matching a human being's maxillary dental arch and mandible dental arch, respectively; the upper teeth brace and the lower teeth brace laterally extend a mucosa protection device opposite to an upper molar area and a positioning part opposite to a lower molar area, respectively. The upper teeth brace and the lower teeth brace, both of which have been installed, drive the positioning part and the mucosa protection device to combine each other and keep a flexible displacement space for neither discomfort at a condyle of the mandible.

The present invention discloses a mandibular fracture detection system based on wavelet transform feature enhancement and multi-scale attention focusing, which adopts a constructed mandibular fracture detection model; the mandibular fracture detection model includes a backbone network, a feature fusion network and a detection head part; the backbone network is responsible for efficiently extracting low-level features in the image, and then further feature extraction is performed. Through the C3K2_WT module, global and local feature information is obtained to further enhance the detailed expression of the mandibular fracture line, and then the spatial attention of the feature map is enhanced through the C2PSA_EMA module. The feature fusion network aggregates feature maps from different resolutions and passes them to the detection head, and the C3K2_WT module is used again to improve the model's ability to extract the most important part of the image; the prediction results generated by the three detection heads are merged through non-maximum suppression to obtain the final result, and the position of the mandibular fracture line is accurately located. By using the present invention, the detection accuracy of the mandibular fracture line and the robustness of the model can be significantly improved.

The invention relates to the technical field of oral and maxillofacial surgical operating instruments, and discloses a mandible condyle fracture precise and reliable reduction combined instrument which comprises a condyle tooth hook, a double-end drag hook, a V-shaped pusher and a large-angle drag hook which are all made of 17-4PH stainless steel. The condylar process tooth hook is of a double-end design, and the double-end draw hook has two working forms. According to the precise and reliable reduction combined instrument for the mandible condylar fracture and the application method, by arranging a special instrument set with the complementary functions of the condylar tooth hook, the double-end drag hook, the V-shaped pusher and the large-angle drag hook, view exposure, soft tissue protection and bone segment reduction and stabilization are all considered, meanwhile, a systematized operation scheme formed by the set instrument is achieved, and the operation efficiency is improved. The whole-course operation from soft tissue exposure to bone segment fixation is covered, the technical blank of the complete set of instruments in China is filled, and the standardization and efficiency of the operation are greatly improved.

This invention discloses a method for reconstructing a three-dimensional motion and joint force dynamic model of the jaw system, relating to the field of medical technology. The method includes: S1, acquiring a multimodal dataset synchronously collected through a multimodal sensing system and unified to a skeletal coordinate system based on the mandible and temporomandibular joint; S2, constructing an individualized mandibular musculoskeletal model based on the patient's jaw CT image data; S3, using an optimization algorithm, taking the multimodal dataset as input, and under the constraints of the mandibular musculoskeletal model, performing inverse kinematics solution to deduce the six-degree-of-freedom motion trajectory of the mandible in three-dimensional space; S4, based on the six-degree-of-freedom motion trajectory, applying the optimization algorithm and the mandibular musculoskeletal model, and calculating the dynamic contact reaction force distribution of the temporomandibular joint through inverse dynamics analysis; S5, using the dynamic contact reaction force distribution as input, feeding it back to the mandibular musculoskeletal model to calculate the intensity distribution of key muscles involved in mandibular movement.

The utility model belongs to the technical field of medical apparatus and instruments, concretely relates to a kind of extraoral anterior traction during dentition period. Including cap body and rigid brim, still including jaw bag, the jaw bag two sides are movably connected with rigid brim by telescopic elastic band, the jaw bag two sides are also connected or bypass patient neck interconnect by elastic band with the rear end of cap body. The middle of cap body is also connected with maxilla traction belt, and multiple fixed columns are distributed on the maxilla traction belt. The two ends of oral appliance are connected with the fixed column on maxilla traction belt by rubber band. The lower end of maxilla traction belt can also be connected with the elastic band, so that the whole equipment structure is more compact. The utility model not only helps children patients to reduce the frequency and degree of mouth opening, but also produces a forward and upward traction on the mandible, changes the growth direction of the mandible growing backward and downward due to mouth opening, and tends to be normal.

The application provides a self-conchal process condyle and mandible reconstruction bone support type guide plate and titanium plate assembly, which comprises a condyle reconstruction osteotomy guide plate, a condyle reconstruction fixed titanium plate, a mandibular median joint osteotomy guide plate and a mandibular median joint fixed titanium plate. The combination of the above-mentioned bone support type guide plate and titanium plate assembly improves the accuracy of the self-conchal process condyle and mandible reconstruction through CAD / CAM combined with screw rail transfer technology, helps to shorten the operation time, and is beneficial to the recovery of the occlusal function after the mandibular body reconstruction.

In CT visualization software, zones of the right and left temporomandibular joints (TMJs) are visualized sequentially. In a frontal plane, each of the condylar processes of the TMJs are delimited into sections. In a sagittal plane, separate 3D contours of the fossae and the condyles of the TMJs are created. The contours of the condyles are combined with a 3D model of the mandibular teeth, and a 3D model of the mandible with the teeth and the condylar processes is obtained. The contours of the fossae are combined with a 3D model of the maxillary teeth, and a 3D model of the maxilla with the teeth and the contours of the glenoid fossae is obtained. The 3D scene objects obtained are distributed according to side and identification code, and precise tracking of the movement of the condyles and the fossae of the TMJs during movement of the mandible is provided.

The utility model relates to the technical field of medical instruments, in particular to an electronic gothic arch device for determining dentition defect jaw position relation, which comprises an upper jaw part and a lower jaw part, the upper jaw part comprises an upper jaw plate and upper jaw supports arranged on two sides of the upper jaw plate, and the lower jaw part comprises a lower jaw plate and lower jaw supports arranged on two sides of the lower jaw plate. The electronic Gothic bow further comprises a tracing needle connected to the lower jaw plate and a piezoelectric film sensor arranged on the lower surface of the upper jaw plate. The upper end of the tracing needle can abut against the piezoelectric film sensor, the tracing needle can generate a dynamic pressure signal on the surface of the sensor along with displacement of the lower jaw plate, and the pressure signal is used for generating lower jaw movement track data in real time. Compared with the prior art, the mandibular movement track is accurately recorded in real time, the central relation position of the upper and lower jawbones can be accurately determined, high-precision and repeatable jaw position relation data is provided for subsequent false tooth repair, and the false tooth repair quality is remarkably improved.

The utility model discloses a kind of improved mandibular protrusion appliance, it includes the upper dental brace (1) of sleeve fixed on maxillary plate and the lower dental brace (2) of sleeve fixed on mandibular plate, the front side welding of the upper dental brace (1) has upper traction hook (3), the rear side welding of the lower dental brace (2) has lower traction hook (4), the upper traction hook (3) and lower traction hook (4) are mutually traction by elastic rubber band (5) between, the middle part of the upper dental brace (1) is provided with an arch expander (6), the bottom of the upper dental brace (1) is provided with upper inclined plane (7).The utility model is easy to adjust and grind, can be adjusted according to replacement tooth condition;Arch expander is arranged in the upper dental brace, and anterior teeth are retracted;Mandible can be protruded by the traction of mouth outer bow and head cap, realize counterclockwise rotation jaw plane, carry out good vertical control, improve face shape better.

The invention relates to the field of medical teaching equipment, in particular to a mandible movement simulation mechanism for teaching a simulated person, which comprises a simulated mandible, a simulated temporal bone and a mandible movement mechanism for connecting the simulated mandible and the simulated temporal bone, the mandible movement mechanism comprises a right movement mechanism, a left movement mechanism and a right movement mechanism, the left movement mechanism is matched with the right movement mechanism for linkage; one end of the left movement mechanism is fixedly connected to the left side of the simulated temporal bone, and the other end is fixedly connected to the rear side of the left wisdom tooth of the simulated mandible. By arranging the left movement mechanism and the right movement mechanism, the left movement mechanism and the right movement mechanism move cooperatively, the movement track of the mandible in the mouth opening and closing process of a real person is restored, and therefore the space of the throat wall of the trachea cannula is simulated when the mouth is opened for clinical operation. In the opening and closing process, the simulation of composite motion of rotation and sliding is realized, so that the teaching requirements in medical teaching activities are met.

Mandibular repositioning devices providing downward movement as well as forward movement of the mandible have a maxillary tooth covering having a driver flange protruding laterally outward on one or both sides thereof and have a mandibular tooth covering having a protrusive flange extending cranially therefrom positioned to have a posterior side engaged with the anterior side of each driver flange. The anterior side of each driver flange has a convex curvature. The posterior side of each protrusive flange has a concave-to-convex curvature positioned to move the convex portion thereof along the convex curvature of the driver flange when the mouth opens, which also moves the mandible forward. A plateau of a preselected height, which prevents disconnect between each protrusive flange and its respective driver flange relative to a fully open mouth measurement, is present between the base of the protrusive flange and the tooth covering.

A temporomandibular joint replacement system comprising a condylar component anatomically contoured for attachment with a mandibular bone with a condylar head and a fossa component 102 with a fossa ba

A configurable time-delayed oral mandible displacement device includes a top member and a bottom member, the bottom member slidably coupled to the top member for movement between a non-extended position and an extended position. A control mechanism is coupled between the top member and the bottom member for controlling extension of the bottom member. The control mechanism an element fabricated from a shape memory material. The control mechanism further includes a heat-transfer control portion providing configurability by variation of a characteristic thereof. The configurability allows for controllably selecting a duration of an activation time delay, during which the temperature of the element fabricated from shape memory material increases to an activation temperature by absorbing body heat from a human wearer after the device is inserted into the mouth of the human wearer.