9 results about "Articular disc" patented technology

The temporomandibular joint disc suture needle with the holding structure comprises a needle tube main body, and the two ends of the needle tube main body are a puncture end and a propelling end respectively. The holding mechanism is used for forming a transverse holding type holding structure, the propelling mechanism is used for suturing the joint disc, the puncturing mechanism is used for puncturing and anchoring the joint disc, the holding mechanism is arranged on the side portion of the needle tube body, and the propelling mechanism is assembled at the propelling end of the needle tube body. The needle tube has the advantages that the holding mechanism is arranged, the holding mechanism and the needle tube body jointly form a T-shaped transverse holding type holding structure, an operator can hold the needle tube conveniently, the situation that the operator exerts force difficultly during suturing is avoided, and it is guaranteed that fine suturing operation is carried out smoothly; the propelling mechanism is arranged to be matched with the puncture mechanism, the anchoring part can be stably pushed to the designated position of the temporomandibular joint disc, anchoring of the suture line can be achieved through one-time pushing, and operation is easy.

This invention provides a biomimetic training model for temporomandibular arthroscopic disc reduction and suturing. The biomimetic training model includes: a skull model with several traction positioning components; a simulated articular disc; a simulated joint capsule including a superior and inferior joint capsule, which are respectively connected to the upper and lower surfaces of the simulated articular disc; the superior joint capsule has an upper opening, and the inferior joint capsule has a lower opening; a temporal bone connector connected to the upper opening and detachably connected to the temporal bone of the skull model; a mandibular bone connector connected to the lower opening and detachably connected to the mandible of the skull model; and several traction components, one end of which is connected to the simulated articular disc, and the other end is adapted to be detachably connected to the traction positioning components, thereby adapting the shape and position of the simulated articular disc by connecting the traction components to the traction positioning components.

The invention provides a temporal-mandibular joint disc segmentation measurement method and device, electronic equipment and a medium, and the method comprises the steps: detecting a temporal-mandibular joint region from a magnetic resonance image containing a temporal-mandibular joint, and cutting a temporal-mandibular joint region image; segmenting a temporal-mandibular joint disc contour and a condylar process contour from the temporal-mandibular joint area image; constructing at least one maximum inscribed circle located in the condylar process contour based on the condylar process contour, determining the direction of a reference line based on the center of the maximum inscribed circle, and taking the intersection point of the reference line and the condylar process contour as a condylar process vertex; identifying a joint disc anterior zone leading edge point, a joint disc middle zone thinnest center point and a joint disc posterior zone trailing edge point from the interior of the temporomandibular joint disc contour; and measuring joint disc information according to the condyle vertex, the reference line, the circle center, the joint disc anterior zone leading edge point, the joint disc middle zone thinnest center point and the joint disc posterior zone trailing edge point. Through the method, the measurement efficiency of the joint disc information is improved.

The invention discloses a manufacturing method of a functional jaw pad for temporomandibular joint disc-derived dentomaxillofacial deformity. The manufacturing method comprises the following steps: 1) determining a dentomaxillofacial deformity type of a patient; 2) determining a required condyle process moving direction; then, the condylar process positions of the uninjured side and the affected side are accurately adjusted in 3D design software; after the condylar process position is adjusted, the temporal-mandibular joint gap needs to meet the condition that the posterior gap and the anterior gap are not less than 2; the upper gap is greater than or equal to 2mm; the anterior tooth mandibular covering and the dentition midline of the patient are synchronously optimized in the condylar process moving process; 3) preparing an individualized functional jaw pad by using a 3D printing technology; and 4) realizing quantitative evaluation and safety guarantee of condyle movement through accurate adjustment of the condyle in design software and establishment of a grid reference frame. By improving the jaw position relation and the occlusion stability in advance, a better skeleton and joint foundation can be provided for postoperative tooth movement, and the recurrence risk caused by unstable joints in the orthodontic process is reduced.

The application discloses a manufacturing method of a digital guide plate for temporomandibular joint cavity injection, and the CT and MRI data of a patient are subjected to image segmentation, three-dimensional reconstruction and image registration in a computer software, so that the models of the condylar process, the articular disc and the articular tubercle of the temporomandibular joint are obtained and the relative position relationship is confirmed, and thus the positions of the upper cavity and the lower cavity of the joint are determined. According to the patient's condition, the drug is injected into the upper cavity or the lower cavity of the joint, and the needle insertion position, angle and depth of the injector are simulated in the software. On the basis of the soft tissue of the maxillofacial part reconstructed by the CT of the patient, a 3D printing guide plate which can be attached to the surface of the soft tissue is designed individually, and the guide hole is determined on the guide plate in combination with the needle insertion position, angle and depth. The guide plate comprises a positioning wing for assisting installation and positioning and a preset needle insertion guide hole, and can be used for guiding the needle insertion of the injector and the drug injection in the joint cavity injection treatment.

The invention relates to a folding ruler with a plurality of flat links (1, 2) elongated in a longitudinal direction (L) which are connected in pairs via a joint connection (10) about an axis of rotation (D) in a pivotable manner, wherein - the joint connection (10) has a first articulating disc (11) fixed to a first member (1) and a second articulating disc (12) fixed to a second member (2), - the joint discs (11, 12) have mutually complementary locking means which lock into each other in a folded position and in an unfolded position of the links (1, 2) on the one hand, and in an angled intermediate position between them when the first link (1) is pivoted relative to the second link (2) on the other hand, - the joint discs (11, 12) have an outer diameter (A) that is smaller than a link width (B) of the links (1, 2), - the first joint disc (11) has a total of four internally and diametrically arranged detent through holes (13.1, 13.2, 13.3, 13.4) as detent means, - the second joint disc (12) has a total of two diametrically arranged detent projections (14.1, 14.2) as detent means with respect to the axis of rotation (D) and - the grid elevations (14.1, 14.2) are each arranged on an elastically flexible spring tongue (15.1, 15.2) of the second joint disc (12) on the inside.

This utility model relates to the field of lower limb assistive device technology, and more particularly to a power joint mechanism for a lower limb assistive device. The technical solution includes: a flexible joint assembly, which comprises a joint disc frame, a flexible disc disposed within the joint disc frame, a spiral spring disposed within the flexible disc, and two sets of limiting arc grooves formed on the flexible disc. Each set of limiting arc grooves contains a positioning pin. Leg components are disposed at the lower end of the joint disc frame and the upper end of the flexible disc. Each leg component includes a fitting plate, with a strap and an adjustment strap respectively disposed on both sides of the fitting plate, and a positioning post disposed on the strap. Compared to traditional complex mechanical structures, this utility model, through the coordinated arrangement of the flexible joint assembly and the two sets of leg components, results in a more compact overall structure, smaller size, lighter weight, and easier wear and use, as well as easier storage and portability.

The utility model discloses an anchoring system for a temporomandibular joint disc reduction anchoring operation, which comprises a suture line anchored on a joint disc, an anchoring sheet for quickly anchoring the suture line and the joint disc, and a positioning nail for positioning the suture line, the suture line is arranged on the inner side of the joint disc, the anchoring piece is assembled in the middle of the suture line and arranged on the inner side of the joint disc, the positioning nail is assembled on the suture line, and the positioning nail and the anchoring piece are arranged at intervals. In the operation process, the suture line and the joint disc can be connected without the operation of threading and line pulling, the operation requirement for an operator is low, the operation time is effectively shortened, and extra operation wounds caused to a patient are avoided; the anchoring force and stability of the positioning nail can be effectively improved, the falling phenomenon of the positioning nail is avoided, and the anchoring effect is guaranteed.

The invention belongs to the technical field of magnetic resonance, and particularly relates to a temporal-mandibular joint dynamic magnetic resonance radio frequency coil capable of adapting to different head types, which comprises a magnetic resonance machine body, a fixed coil and a movable coil, the multiple fixed coils are arranged on the outer side of an inner cavity of the magnetic resonance machine body in a surrounding mode. The multiple movable coils are arranged in an inner cavity of the magnetic resonance machine body in a surrounding mode and located on the inner rings of the multiple fixed coils. Each movable coil is positioned between two adjacent fixed coils; the plurality of movable coils can move towards the center of the magnetic resonance machine body through a pushing mechanism; the movable coil can be tightly attached to temporomandibular joints of different head types through dynamic adjustment, the signal sensitivity and the image signal-to-noise ratio are effectively improved, and fine structures such as a joint disc are displayed more clearly. The problem that the imaging quality is unstable due to the difference of the head shape and the face contour of the patient is solved, and the consistency and the accuracy of diagnosis are guaranteed.