38 results about "Articular fossa" patented technology

A glenoid implant assembly is provided. The assembly includes a first component for attachment to the glenoid fossa of a scapula. The component defines an assembly face of the component. The assembly also includes a second component removably secured to the first component. The second component includes an assembly face of the second component. The assembly face of the second component is in close approximation to the assembly face of the first component. The second component is attachable to the first component in a direction generally normal to the assembly faces.

A method of shoulder arthroplasty in one embodiment includes accessing a scapula, identifying an inferior glenoid circle center of the scapula, preparing a glenoid fossa of the scapula to receive a prosthesis, selecting a glenoid component, and implanting the selected glenoid component based upon the identified inferior glenoid circle center in the prepared glenoid fossa.

Oral apparatus 60 and methods for the reduction of cortisol levels due to psychological stress are disclosed. The oral apparatus 60 include at least a first bite pad 62 and a second bite pad 64 configured to be positioned between at least one of the molars of a user to relieve pressure at the temporomandibular joint or to withdraw the mandibular condyle from the articular fossa of the temporomandibular joint. The oral apparatus 60 is configured and the methods designed to downregulate the levels of cortisol in a user.

The invention relates to an artificial temporomandibular joint based on three-dimensional printing. The artificial temporomandibular joint comprises a temporal bone joint surface, a temporal bone zygomatic process fixing plate, a processus condyloideus and a processus condyloideus fixing handle. The temporal bone joint surface and the temporal bone zygomatic process fixing plate form an articular fossa. The processus condyloideus is a joint. The processus condyloideus performs activities such as opening and closing through the articular fossa. The tail end of the processus condyloideus is also provided with a processus condyloideus fixing handle. The processus condyloideus and the processus condyloideus fixing handle are manufactured by means of three-dimensional printing technology. The articular fossa is made of high-wearing-resistance and high-biological-compatibility material such as poly(ether-ether-ketone). The material can reduce joint wearing. According to the artificial temporomandibular joint, individual design is performed according to patient anatomical features such as radian of the temporal bone joint surface and the temporal bone zygomatic process, the width, the angle and the appearance of a mandible ramus, so that the temporal bone zygomatic process fixing plate and the processus condyloideus fixing handle can well abut against the temporal bone joint surface, the temporal bone zygomatic process and the mandible ramus, thereby manufacturing the artificial temporomandibular joint which accords with the anatomical features of Chinese people.

Exemplary embodiments of the present disclosure are directed towards an implantable device for complete replacement of temporomandibular joint comprising of a condyle component to reconstruct a mandibular end of the temporomandibular joint designed for movement within the implantable device with a plate; and a condyle surface where the plate is configured to mechanically secure the condyle component to a ramus surface of a patient undergoing implant with the aid of screws; and the condyle surface polished to generate a mirror effect to reduce the friction in the implantable device and infection rate; a zygomatic arch component to reconstruct a temporal bone (glenoid fossa) of the temporomandibular joint comprising at least one of: a plate; a plurality of multiple threaded counter sink holes; a plurality of conically tapered holes and a zygomatic arch surface, whereby the multiple threaded counter sink holes are structured within the plate; and a fossa component configured to be positioned between the condyle component and the zygomatic arch component to anchor the movement of the temporomandibular joint and the fossa component comprising of a low density biocompatible material made of a polycarbonate which is utilized in the additive manufacturing for the synthesis of implantable device for temporomandibular joint.

The invention provides a temporal-mandibular joint motion reconstruction method based on multi-modal information fusion. The temporal-mandibular joint motion reconstruction method is characterized by comprising the following steps: making an upper and lower jaw marking device; acquiring and processing mandibular movement data; acquiring and processing CBCT data images; fusing the mandibular movement data and the CBCT image data; a multi-jaw-position biteplate is manufactured; acquiring and processing an MRI data image; the mandibular movement data, CBCT image data and MRI image data are registered and fused, and mandibular movement is visually reproduced in a 3D model and image mode. According to the method, the ternary relative motion relation and the space posture of the temporomandibular glenoid fossa, the joint disc and the condyle process are accurately recorded, the real functional motion state of the temporomandibular joint is revealed in a visual and quantitative mode, and the method can be used for clinical research of the temporomandibular joint, serves as an auxiliary means for diagnosis, treatment and prognosis evaluation of temporomandibular joint diseases and has a good application prospect. Clinical operation is easy and convenient, the difficulty that a clinician judges the position of the joint disc can be lowered, and the accuracy of diagnosis and treatment of temporomandibular joint diseases is improved.

A bone reamer (14) includes a shaft (30) and a cutting element (32). The shaft includes a proximal end (34), a distal end (36), and a flexible portion (37) disposed between the proximal and distal ends. The cutting element is carried by the shaft and includes a cutting surface (62) facing the distal end of the shaft such that the distal end of the shaft is offset from the cutting surface. The cutting element may have arms (60) and a propeller-shaped profile. The shaft defines a cannula (42). A guide (16) for the bone reamer has a boss (66) along a first axis (76), a hub (68) along a second axis (81) forming an angle [alpha] with the first axis, and a flange (70) substantially perpendicular to the second axis. The reamer can be used for reaming the glenoid.

The present invention relates to the field of implant prostheses and particularly to a temporomandibular joint prosthesis. The temporomandibular joint prosthesis comprises a mandible prosthesis, a mandible fixing plate, a glenoid fossa prosthesis made of ultra-high molecular weight polyethylene/ceramic, a glenoid fossa fixing plate and a condyle process prosthesis prepared from cobalt-chromium-molybdenum alloy by mechanical processing/ceramic, a positioning boss is formed at one end, matched with the condyle process prosthesis, of the mandible prosthesis, and a positioning groove matched withthe positioning boss is formed in the condyle process prosthesis. A condyle process on the mandible prosthesis is designed into the separated single condyle process prosthesis, and the condyle processprosthesis is made of the cobalt-chromium-molybdenum alloy or ceramic and matched with the glenoid fossa prosthesis made of the high polymer polyethylene material or ceramic to form a structure of amovable joint part. Therefore, the mandible joint and the mandible fixing plate can be subjected to 3D printing by a titanium alloy material to adapt to a unique face shape of each patient, and meanwhile, a problem of osteolysis caused by long-term use is also solved.

The invention provides a temporomandibular joint (TMJ) and mandible joint prosthesis which at least comprises a TMJ fossa prosthesis, a mandible prosthesis and a joint head prosthesis, wherein the mandible prosthesis comprises a mandible ascending ramus part and a mandible extending part, the mandible ascending ramus part and the mandible extending part are connected to form an individualized simulation mandible ascending ramus and at least part of mandible body form; the tail end of the mandible ascending ramus part of the mandible prosthesis is fixedly connected with the articular head prosthesis; and the bent concave surface of the mandible prosthesis is used as the upper side, and a continuous or discontinuous porous structure area is arranged in the middle of the mandible prosthesis.The TMJ and mandible joint prosthesis can repair TMJ functions, mandible forms, dentition defects and the like of various TMJ-mandible joint defects individually at the same time to achieve joint reconstruction of TMJ-mandible-dentitions.

The invention belongs to the technical field of artificial joints and particularly discloses a composite diamond-ene artificial joint. The composite diamond-ene artificial joint comprises an articular head and an articular fossa which are matched with each other. The articular head comprises a metal matrix, and a superfine diamond-ene layer formed by nano diamond-ene is arranged outside the metal matrix. The articular fossa comprises a polyethylene matrix, one side, matched with the articular head, of the polyethylene matrix is provided with a wear-resistant layer which is formed by nano diamond-ene and polyethylene, and the volume ratio of the nano diamond-ene to the polyethylene is 2:3 or 1:1. The composite diamond-ene artificial joint is high in hardness, good in wear resistance and long in service life.

The invention provides a muscle function preservation type all-temporal lower joint prosthesis which at least comprises an articular fossa piece and an articular head piece abutting against the articular fossa piece. The articular head piece comprises a lower jaw rear edge fixing plate, a Z-shaped incisura fixing plate and a joint head part; the lower jaw rear edge fixing plate is connected with the lower end of the joint head part, extends downwards, is of a plate-shaped structure and comprises a lower jaw rear edge surface fitting surface; the Z-shaped incisura fixing plate protrudes out ofone side of the lower jaw rear edge fixing plate, extends in the direction far away from the lower jaw rear edge fixing plate, is of a plate-shaped structure and comprises a lower jaw ascending and supporting second incisura portion attaching face. The prosthesis can effectively repair the normal anatomical structure of the temporal-mandibular joint, preserve attachment of normal extraprandial muscles and occlusal muscles, recover the functions of chewing, speaking, movement and the like of a patient, solve the problems of postoperative mandibular deflection and chewing weakness of the patient, is more precise and smaller in design, reduces operation wounds, shortens operation time and reduces operation difficulty.

The invention relates to a temporomandibular joint disc anterior displacement model for teaching, which comprises an upper jaw skull, a lower jawbone and a joint disc, the joint disc is positioned between a joint nodule and a condylar process, the front end of the joint disc is provided with a non-elastic anterior ligament, and the rear end of the joint disc is provided with an elastic posterior ligament; the model further comprises an adjuster arranged at the coracoid position of the lower jawbone, the adjuster comprises adjusting teeth and an adjusting rod arranged on the adjusting teeth, tooth grooves are formed in the sides, connected with the adjusting rod, of the adjusting teeth at intervals in the axial direction, the adjusting rod is connected with the anterior ligament of the joint disc, and the adjusting rod moves in the axial direction of the adjusting teeth. The joint disc is driven to move forwards between the joint nodule and the condylar process, and the normal joint disc state, the renaturable joint disc forward displacement state and the non-renaturable joint disc forward displacement state are simulated; the posterior ligament of the joint disc is connected with the posterior upper wall bone of a glenoid fossa to drive the joint disc to return. The problems that a special model is lacked at present, and temporomandibular joint disc anterior displacement symptoms are difficult to explain and display to students and patients can be effectively solved.

The utility model relates to an articular fossa file, and belongs to the technical field of medical instruments. The articular fossa file comprises a ball cage cutter body and a connecting rod, wherein a connecting sleeve is integrally formed on the ball cage cutter body; and one end of the connecting rod can be inserted into the connecting sleeve, the other end of the connecting rod is used for being connected with an external driving device, and under the driving of the external driving device, the connecting rod can drive the ball cage cutter body to rotate for filing. The articular fossa file has the advantages of being easy and convenient to install, wide in application range and stable in transmission.

The invention discloses a skull three-dimensional model with temporomandibular joint discs, and relates to the technical field of medical treatment, the skull three-dimensional model comprises a skull component model and a mandibular body model, two groups of guide discs are symmetrically arranged at the bottom of a joint fossa, and screws and first upper rotating shafts are jointly connected between the skull component model and each group of guide discs; when the skull composition model and the mandibular body model are subjected to mouth opening and mouth closing motions, under the action of the bearing, when the mandibular body model rotates anticlockwise around the first connecting rod, the mandibular body model embodies the mouth opening motion; when the mandible body model rotates clockwise around the first connecting rod, the lower jawbone achieves closed movement, and when the lower jawbone model moves forwards and backwards, the joint disc slides along with movement of the condylar process. The two sets of fastening bolts slide forwards in an arc shape along the interior of the guide sliding groove, and the motion trail of the temporomandibular joint can be displayed.

The invention discloses a method for preparing an in-situ and pulmonary metastasis tumor model through intra-tibial injection. A nude mouse is anesthetized by ketamine according to the amount of 100mg/ kg, and an operation is performed after 5min. The method comprises the following steps: (1) enabling the left hind limb of the nude mouse to be bent, wherein the included angle of the tibia and thefemur is 45 degrees; (2) preparing a Hamilton LT type injection needle with a common 1ml syringe needle, enabling the needle to penetrate into the joint gap of the tibia and the femur, inserting the needle from the concave point of the joint fossa of the tibia, and slowly penetrating through the cancellous bone part of the tibia along the long axis direction of the tibia backbone to enter the marrow cavity, so that an obvious breakthrough feeling is achieved; (3) slowly injecting 10 microliters of human sarcoma cell suspension, wherein about 1 * 105 cells are injected; and (4) pulling out theneedle, and putting back the nude mouse into a cage after the nude mouse is revived. The success rate of the in-situ lung metastasis tumor prepared by the method is 100%, and the pathological characteristics of clinical osteosarcoma morbidity and lung metastasis can be simulated.

The temporomandibular joint therapeutic apparatus comprises a reduction head sleeve and a jaw bone reduction device, the reduction head sleeve comprises a chin shield, a chin strap, an upper reduction block, a tension spring, a locking mechanism and a head strap, the chin shield is connected with a lower reduction block through the chin strap, the upper reduction block is arranged on the lower reduction block in a sliding mode, and the jaw bone reduction device is arranged on the lower reduction block. A tension spring and a locking mechanism are arranged between the upper reset block and the lower reset block, and a head band is arranged on the upper reset block. The jaw reduction device comprises a base, adjusting supporting plates, a distraction reduction mechanism, a connecting rod, a distraction grip and a distraction pull rod, the adjusting supporting plates are slidably arranged at the front end and the rear end of the right side of the base, the distraction reduction mechanism is arranged on the outer sides of the adjusting supporting plates, the connecting rod is connected with the base and the supporting rod grip, and the distraction pull rod is slidably arranged in the distraction grip. And one stay wire is connected with the distraction pull rod and controls the two distraction reset mechanisms. The temporomandibular joint distraction device can distraction temporomandibular joints, enables dislocation mandibular bones to be reset synchronously, and finally pushes the corrected mandibular bones into glenoid fossa.

The invention provides a bridge movable joint device and a construction method, and relates to the field of bridge engineering. The bridge movable joint device comprises a first structural part, a second structural part, a joint head, a joint fossa and a first elastic part. The second structural member is arranged on the top of the first structural member. The joint head is connected with the first structural part. The articular fossa cover is arranged at one end of the articular head, and the articular fossa is connected with the second structural member. A joint cavity is formed between the joint head and the joint fossa. The first elastic piece is arranged in the articular cavity, and the first elastic piece is configured to allow the articular head and the articular fossa to move relatively. According to the bridge movable joint device, the joint head is connected with the first structural part, the joint nest is connected with the second structural part, the first elastic part is arranged between the joint head and the joint nest, and the first structural part can move relative to the second structural part, so that the bending moment and torque of the first structural part and the second structural part are released, and the structural stress is improved; the service life of the bridge is prolonged.

The invention belongs to the technical field of artificial joints and particularly discloses a diamond-ene artificial joint. The diamond-ene artificial joint comprises an articular head and an articular fossa which are matched with each other. The articular head comprises a metal matrix, and a superfine diamond-ene layer formed by nano diamond-ene is arranged outside the metal matrix. The articular fossa is made of nano diamond-ene and polyethylene, and the volume ratio of the nano diamond-ene to the polyethylene is 2:3 or 1:1. The surface roughness of the articular fossa is smaller than 0.1 micrometer. The diamond-ene artificial joint is high in hardness, good in wear resistance and long in service life.