22 results about "Articular fossa" 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 invention provides a temporomandibular artificial joint replacement device, a preparation method and a surgical robot system.The temporomandibular artificial joint replacement device is characterized in that a mandibular fixing support is fixedly connected with the outer side face of the mandible of the human body, a temporal bone fixing support is fixedly connected with the outer side face of the temporal bone of the human body, a containing cavity is formed in a glenoid fossa liner, and a spherical joint head is movably arranged in the containing cavity; a base layer, a variable-rigidity elastic buffer layer and a surface layer are sequentially arranged on the inner wall of the containing cavity in the thickness direction of the side wall of the glenoid fossa liner. By means of the temporal-mandibular artificial joint replacement device, efficient simulation of the temporal-mandibular joint replacement device on a real human body temporal-mandibular joint structure can be achieved, the structural strength and the use comfort of the temporal-mandibular artificial joint replacement device are improved, and based on artificial intelligence and a surgical robot auxiliary technology, the device is simple in structure and convenient to use. The preparation function of the temporomandibular artificial joint replacement device matched with the human tissue structure and the automatic assembly surgical operation are achieved.

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.

The embodiment of the invention provides a glenoid fossa prosthesis, a glenoid fossa prosthesis model generation method, a glenoid fossa prosthesis model generation device, computing equipment and a computer program product. The method comprises the following steps: acquiring mandibular movement data and skeleton image data of a test object; establishing a skeleton model of the test object according to the skeleton image data; carrying out motion loading on the skeleton model according to the mandibular motion data; performing motion simulation based on the skeleton model after motion loading to generate a mandibular motion envelope surface; determining parameters of a glenoid fossa prosthesis model according to the mandibular movement envelope surface, and generating the glenoid fossa prosthesis model, namely, constructing a kinematics model based on temporal-mandibular joint movement data of a normal person with extrawings attached, and determining the mandibular movement envelope surface based on a condylar process vertex; according to the articular fossa prosthesis model of the artificial temporomandibular joint prosthesis with the extrawing muscle attachment, the technical problem that the articular fossa prosthesis cannot adapt to the physiological movement range of the artificial mandibular branch prosthesis in the related technology is solved.

A muscle function preservation type total temporomandibular joint prosthesis includes an articular fossa member (1) and an articular head member (2) abutting against the articular fossa member (1). The articular head member (2) includes a mandibular trailing edge fixing plate (21), a sigmoid notch fixing plate (22) and an articular head portion (23). The mandibular trailing edge fixing plate (21) is connected to a bottom end of the articular head portion (23) and extends downwards, and has a plate-shaped structure and includes a mandibular-trailing-edge-surface attaching surface. The sigmoid notch fixing plate (22) protrudes from one side of the mandibular trailing edge fixing plate (21) and extends in a direction away from the mandibular trailing edge fixing plate (21), and has a plate-shaped structure and includes a mandibular-ramus-proximal-sigmoid-notch-portion attaching surface.

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 provides an assembled radial head prosthesis, and belongs to the technical field of medical instruments. The invention provides an assembled radial head prosthesis which comprises a radial head, a radial handle and a plurality of sets of filling parts, a joint nest is formed in the upper end of the radial head, and a mounting groove is formed in the lower end of the radial head; a mounting head is arranged at the upper end of the radial handle and is arranged in the mounting groove; the multiple sets of filling parts are sequentially arranged in a stacked mode and all arranged on the outer side of the radial handle in a sleeving mode, the inner side walls of the filling parts are matched with the outer side wall of the radial handle in shape, and the filling part at the lowermost end is located above the osteotomy bone surface of the radius of the patient. According to the assembled radial head prosthesis, the number of the filling pieces is selected according to the actual situation, the filling pieces are arranged between the radial head and the osteotomy bone surface of a patient, the osteotomy bone surface is supported, the position of the radial head is limited, the stability of the prosthesis after implantation is improved, and the risks that the prosthesis is loosened and fractures occur around the prosthesis are reduced.

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 present invention provides a method for reconstructing temporomandibular joint movement based on multimodal information fusion, which is characterized by: making upper and lower jaw marking devices; collecting and processing mandibular movement data; collecting and processing CBCT data images; fusing mandibular movement data and CBCT image data; making multi-jaw position occlusal splints; collecting and processing MRI data images; registering and fusing mandibular movement data with CBCT and MRI image data steps to visually reproduce mandibular movement in the form of 3D models and images. The present invention realizes accurate recording of the relative movement relationship and spatial posture of the temporomandibular joint fossa, articular disc, and condyle, reveals the true functional movement state of the temporomandibular joint in an intuitive and quantitative form. This method can be used in clinical research of the temporomandibular joint, as an auxiliary means for the diagnosis, treatment, and prognosis evaluation of temporomandibular joint diseases. The clinical operation is simple, which can reduce the difficulty of clinicians in judging the position of the articular disc and improve the accuracy of the diagnosis and treatment of temporomandibular joint diseases.

The invention relates to the technical field of minimally invasive surgery, in particular to a mandible condylar fracture bionic simulation trainer and a use method thereof. According to the technical scheme, the device comprises a profiling upper jaw part, a bionic lower jaw part, a left glenoid fossa, a skin, a right glenoid fossa, a bionic left profiling tissue and a bionic right profiling tissue. The right joint fossa is fixed in the fixing hole in the rightmost end, when the center locking piece is loosened, the center locking piece can slide in the corrugated hole, when the center locking piece is locked, the center locking piece is fixed in the corrugated hole, and the telescopic support assembly is fixed to the first main framework through the center locking piece. And meanwhile, the bionic lower jaw part, the bionic left profiling tissue and the bionic right profiling tissue are matched, so that the simulation accuracy is improved, detailed data are given to medical staff, and the occurrence of later-stage operation problems is reduced.

The present invention discloses a method for preparing digital complete dentures based on precise mandibular positioning, belonging to the technical field of denture preparation. The above preparation method includes the following steps: S1: Obtain oral data; S2: Perform digital design and adjust the jaw position through 3D editing software; S3: Design a jaw guide plate with a tray function through anatomical missing teeth and arrange teeth; S4: Prepare a fine impression and obtain an occlusion record; S5: Design and prepare complete dentures according to the edentulous jaw data and occlusion record. The present invention solves the problems that patients with tooth loss are difficult to obtain accurate occlusal relationships, the process is complex, and the technical sensitivity is high. It provides a method for directly moving the condyle and mandible on the clear and visual three-dimensional relationship of the glenoid fossa, condyle and mandible to obtain a therapeutic jaw position, and can directly use the adjusted mandibular position to prepare complete dentures through digital design. The obtained complete denture data is accurate, the preparation operation is simple, and the technical sensitivity is low.

The invention relates to the technical field of oral disease animal model construction methods, in particular to a construction method of a traumatic temporomandibular ankylosis animal model. The construction method comprises the following steps: selecting an anterior auricular region on one side of an experimental subject, avoiding temporal superficial artery and vein, passively separating from front to back along a zygomatic arch to a joint capsule, exposing a mandibular condylar process neck and part of the zygomatic arch, and separating a condylar process after opening the joint capsule; the outer side attachment of the joint disc is separated through the joint gap, the peripheral attachment of the joint disc is cut off after the joint disc is exposed, and part or all of the joint disc is removed; the joint space is exposed through horizontal blunt separation of the joint capsule, part of fibrous cartilage on the condylar process head is removed, and fossa articular cartilage is damaged; after being sober, the animals eat soft food, and the traumatic temporomandibular joint ankylosis animal model is obtained. Modeling is carried out in the mode that the condyle process and the temporal bone glenoid fossa part fibrous cartilage and the articular disc are removed in a surgical operation mode, and the animal model established in a composite trauma mode fits the complex pathological environment of human diseases.

The application provides a suture and anchoring device matched with a temporomandibular joint arthroscope and a use method thereof. The device comprises a suture needle and an anchoring device. The anchoring device comprises a device body in a through barrel shape, and a device head arranged at one end of the device body. The device head comprises a porous shell connected to one end of the device body, a film layer arranged on the porous shell for wrapping the holes of the porous shell, a temperature-sensitive gel layer filled in the porous shell, the temperature-sensitive gel layer being inflatable and changed into a gel solid state in a body temperature environment, a movable rod arranged in the device body, one end of the movable rod extending into the porous shell and the other end extending out of the device body, and an anchoring body wrapped around the outer periphery of the porous shell, the anchoring body being provided with a first anchoring line and a second anchoring line. The application reduces the surgical incision of the external auditory canal, realizes minimally invasive surgery, and after the anchoring device is screwed into the posterior slope of the joint socket and is coagulated, only two times of passing through the articular disc by the suture needle with a line and knot fixing are needed to complete the articular disc reduction and anchoring fixation.

The present application belongs to the technical field of spinal surgery implants, and discloses a new lumbar facet joint prosthesis, which comprises a first fixed base and a second fixed base, a central auxiliary support module connecting the first fixed base and the second fixed base, two groups of joint modules, a joint socket and a joint head, the joint head is ellipsoidal, the joint head is arranged in the inner cavity of the joint socket, the joint head and the inner cavity of the joint socket are in clearance fit, a first opening and a second opening are arranged on the joint socket, and the height of the side wall of the joint socket near the central auxiliary support module on one side is higher than that on the opposite side. The two groups of joint modules symmetrically arranged are used for supporting and limiting the two sides of the vertebral body respectively, instead of the arrangement of a single central elastic connecting piece, so that more stable support is provided, and the stability of the prosthesis is improved; through the clearance fit of the ellipsoidal joint head and the joint socket, the two groups of joint modules are dynamically active, the multidimensional movement of the natural facet joint is simulated, and the movement mode of the lumbar vertebrae is more fitted.

The present application discloses a lumbar intervertebral disc prosthesis, which includes two groups of support assemblies. When the two groups of support assemblies are in working state, they are respectively located on both sides of the first sagittal plane; the support assembly includes two support members, and the rear ends of the two support members are respectively provided with bone screws that can be connected to the vertebrae. One of the support members is provided with a first sliding structure, and the other support member is provided with a second sliding structure. When the first sliding structure and the second sliding structure are connected, they can form a glenoid cavity structure. One of the support members is movably connected to the other support member through the glenoid cavity structure, and the two support members can rotate and tilt relative to each other. The present application using the above structure can reduce surgical incisions and reduce surgical risks.

Artificial socket (10) for a joint implant, wherein the socket (10) comprises a cup-shaped base body (12) with a rim (20) and a pole (24), and wherein the base body (12) has engagement elements (36) projecting towards the bone on an outer surface (14) facing a bone in the insertion position, wherein the base body (12) is coated at least partially on the outer surface (14) with an osteointegrative coating (56), wherein the engagement elements (36) have a first side surface (48) facing a plane (32) defined by the rim (20), and a second side surface (50) facing the bone, characterized in that the coating (56) on the first side surface (48) is thinner than on the second side surface (50) and / or that the engagement elements (36) are coated at least partially in such a way thatthat the coating (56) extends beyond the coating (56) on the first side surface (48) at its free ends in the direction of a plane (32) defined by the edge (20) and the engagement elements (36) with the coating (56) applied to them form an undercut (58) in a direction transverse to the plane (32).

A new type of artificial sitting, iliofemoral ligament and matching anti-dislocation total hip joint prosthesis, including artificial ligament, acetabular cup, acetabular liner and artificial femoral head, the acetabular liner is sleeved with acetabular cup outside, the acetabular liner is a semispherical shape with a plane surface, the center of the plane surface is provided with an inwardly concave joint cavity, the artificial femoral head is inserted into the joint cavity with interference, constituting a movable structure, a plurality of outward ligament fixing holes are arranged on the periphery of the plane surface of the acetabular cup, a nail channel is arranged on the femoral stem of the artificial femoral head, the ligament sleeve ring of the artificial ligament is fixed in the ligament fixing hole through the fixing device, the tail line of the artificial ligament passes through the nail channel on the femoral stem and is fixed on the femoral stem through the locking nail, constituting an anti-dislocation structure; the present application has the advantages of simple structure, close to human physiological structure, low production cost, easy production and manufacturing, can prevent dislocation, solves the pain caused by prosthesis dislocation to patients and doctors, and has significant social and economic benefits.

The invention discloses a real-time CBCT (Cone Beam Computed Tomography)-guided median relationship determination method, system and equipment and a storage medium. The method comprises the following steps: acquiring three-dimensional data of dental arches of upper and lower jaws and jaw bones through intraoral scanning and CBCT scanning, and fitting to establish a virtual patient model; acquiring a spatial position relationship between the motion acquisition marker and the dentition of the patient; taking dental arch feature points by using a probe point, and establishing a space mapping relation from the motion acquisition marker to a CBCT coordinate system; the position of a marker is tracked in real time through an electronic plane bow system, and the position of a condylar process in a glenoid fossa is dynamically displayed in real time on a CBCT image based on a space mapping relation; a physician preliminarily determines a median relation position candidate in combination with a clinical technique under real-time visual guidance; guiding the patient to perform joint function movement, synchronously monitoring the joint function and masticatory muscle movement, and determining the final median relation position after the temporomandibular joint function health is verified. According to the invention, chair-side real-time visualization and functional verification are realized, and the diagnosis and treatment efficiency of jaw position determination is obviously improved.

The application provides a novel biopsy forceps with controllable direction and size, relates to the technical field of medical devices, and comprises a forceps body with a holding end and a working end, the interior of the working end far from the holding end is provided with a joint socket, a lower jaw is provided with a joint ball at one end, and the joint ball of the lower jaw is inserted into the interior of the joint socket of the working end; the lower jaw is rotationally connected with an upper jaw, and the upper jaw has a movement tendency away from the lower jaw; at least three connecting pieces are movably connected with the joint ball of the lower jaw at one end, and the other end of the connecting pieces penetrates through the working end and protrudes out of the holding end; one end of a traction piece is connected with the upper jaw, and when the traction piece moves towards the holding end, the upper jaw is driven to rotate towards the lower jaw, thereby solving the problems that the direction of the jaw of the conventional biopsy forceps is inconvenient to control during use, and the opening size of the jaw can only be adjusted through the operation of medical staff.

The invention discloses a manufacturing and testing method, system and equipment of a double-jaw digital biteplate and a medium. Preoperative masticatory muscle depolarization preprocessing is conducted on a patient, and temporomandibular joint soft and hard tissue three-dimensional data, face proportion data, dentition form data and mandibular dynamic movement track data of the patient are obtained; inputting the soft and hard tissue data into medical image processing software, correcting a condylar process position and virtually positioning the condylar process position to a central position or a muscle-bone stable position of a glenoid fossa in combination with a dentition overlay coverage condition, and obtaining corrected data; by taking the corrected condylar process position as a jaw position reference, the face proportion as a height constraint and the dynamic trajectory as a motion simulation basis, carrying out cooperative processing to generate a three-dimensional model of the biteplate; and manufacturing an entity according to the model, carrying out myoelectricity and occlusion pressure test on the wearer, judging the suitability, and feeding back to adjust the model and remanufacturing the test if the model is abnormal. The personalized adaptation precision, functionality and treatment reliability of the biteplate are improved.

The application discloses a kind of real-time CBCT guided centric relation determination method, system, equipment and storage medium. Upper and lower jaw dental arch and jaw three-dimensional data are obtained by intraoral scanning and CBCT scanning, and a virtual patient model is fitted and established;Obtain the spatial position relationship between motion acquisition marker and patient dentition;Use probe to pick up dental arch feature points, establish the spatial mapping relationship from motion acquisition marker to CBCT coordinate system;Real-time tracking of marker position is realized through electronic facebow system, and the position of condyle in glenoid cavity is dynamically displayed in real time on CBCT image based on spatial mapping relationship;Under the guidance of real-time visualization, the clinician preliminarily determines the centric relation position candidate in combination with clinical method;Guide the patient to carry out joint function movement, and monitor the joint function and masticatory muscle activity synchronously, and determine the final centric relation position after verifying the health of temporomandibular joint function.The application realizes chair-side real-time visualization and function verification, and significantly improves the diagnosis and treatment efficiency of jaw position determination.

The invention relates to the technical field of medical treatment, in particular to a bionic artificial temporomandibular joint replacement prosthesis which comprises a glenoid fossa prosthesis and a mandibular branch prosthesis, the bottom of the glenoid fossa prosthesis is provided with a glenoid fossa lining plate, and the glenoid fossa lining plate is of a semi-elliptic structure; two transverse telescopic sleeves and a plurality of circumferential telescopic assemblies are arranged in the glenoid fossa lining disc; a spherical nest is connected between the two transverse telescopic sleeves, a condyle process ball is arranged at the top of the mandibular branch prosthesis and movably connected into the spherical nest, and the problems that in the prior art, a bionic artificial temporomandibular joint replacement prosthesis is prone to being abraded, a large number of chippings are generated, local infection and inflammation are caused, transplantation fails, and the prosthesis is prone to being damaged are solved. The problems that in the prior art, existing joints are difficult to move, limitation is large, the conditions of model selection difficulty and insufficient adaptability are prone to occurring, popularization is not convenient, effective movement of the joints cannot be guaranteed, and the movement effect needs to be enhanced are solved.