42 results about "Articular fossa" patented technology

A glenoid component for treatment of rotator cuff arthropathy includes attachment to the coracoid process by a pin or post imbedded into a hole formed in the coracoid process. The glenoid component preferably also has a keel for extending into the glenoid fossa and protrusions such as ridges cemented to the acromion process. This way, an attachment point is preferably provided in / on the coracoid process, the acromion process, and the glenoid fossa, and at least two of the attachment points include a protrusion extending into a hole / slot drilled or otherwise formed in the bone. A jig is used for guiding / drilling into the bone, wherein the jig has both a glenoid fossa drill guide and a coracoid drill guide. The coracoid drill guide includes structure that abuts against opposing sides of the base of the coracoid process to prevent rotation of the jig relative to the scapula.

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.

An artificial joint (3), particularly for replacing a talocrural joint, including a first primary joint surface (1) that forms an articular fossa (4) particularly for replacing the tibia composed of concave curvatures extending parallel to a primary function plane of the joint (3), which corresponds to the sagittal plane, and a second primary joint surface (2) which cooperates with the first primary joint surface (1) as a component of a condoyle (5) that replaces the talus and has convex curvatures (7, 8, 9, 10) on the primary function plane that are adapted to the first primary joint surface (1). To achieve high stress resistance and optimal joint mobility, depending on the position of the joint, the radii of the curvatures (7, 8, 9, 10) are calculated such that the differential amounts arising between the corresponding radii of the first and second primary joint surfaces (1, 2) in an ascending angular position (V) relative to a descending angular position and also simultaneously between a medial face (11) and a lateral face (12) of the joint (3) deviate from one another.

An artificial joint (3), particularly for replacing a talocrural joint, including a first primary joint surface (1) that forms an articular fossa (4) particularly for replacing the tibia composed of concave curvatures extending parallel to a primary function plane of the joint (3), which corresponds to the sagittal plane, and a second primary joint surface (2) which cooperates with the first primary joint surface (1) as a component of a condoyle (5) that replaces the talus and has convex curvatures (7,8,9,10) on the primary function plane that are adapted to the first primary joint surface (1). To achieve high stress resistance and optimal joint mobility, depending on the position of the joint, the radii of the curvatures (7,8,9,10) are calculated such that the differential amounts arising between the corresponding radii of the first and second primary joint surfaces (1,2) in an ascending angular position (V) relative to a descending angular position and also simultaneously between a medial face (11) and a lateral face (12) of the joint (3) deviate from one another.

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 a device for cutting out and removing cylinders of tissue from a tissue, which is located inside a body or joint cavity and / or in or on a wall region thereof, comprising a cutting device (12) with a hollow-cylindrical base body (14), a distal opening (18) on a distal end (16) of the base body (14), and a cutting element (20) surrounding the distal opening (18), further anactuating device (22) for rotating the base body (14) about the longitudinal axis (24) thereof on a proximal end (26), and / or on a region (28) facing the proximal end (26), of the base body (14), anda sealing device (30) for closing and opening a proximal opening (32) on the proximal end (26) of the body (14), and the use thereof.

A method, and devices for facilitating the method, for shoulder replacement surgery. The method entails establishing a mechanical support in a the anatomical neck plane of the proximal humeral head, fixing a jig to the mechanical support, where the jig supports a drill guide with its axis perpendicular to the anatomical neck plane, adjusting the drill guide it coincide with the axis of the humeral head, drilling a hole through the humeral head for insertion of a shaft which will support and rotate a reaming bit. The reaming bits used to resurface the humeral head and the glenoid fossa are inserted through the back of the patient, through a gap created between two easily separated muscles, rather than through a gap cut through the subscapularis muscle on the front of the joint. A suitable jig is provided to facilitate the method.

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 invention relates to a method for detecting and displaying the movement of a temporomandibular joint (4) which connects a lower jaw (2) and an upper jaw (5) by means of magnetic resonance imaging.A marker (1) is secured to the lower jaw (2), a marker movement curve (7) is generated using magnetic resonance imaging measurement data sets (6) during a first measurement interval (T1), during which the lower jaw (2) is moved relative to the upper jaw (5), and a point which corresponds to a first position (P1) of the lower jaw (4) relative to the upper jaw (5) is ascertained on the movement curve. An image data set (8) is generated during a second measurement interval (T2), during which the temporomandibular joint (4) is not moved, and a first model (50), which represents at least one partof the upper jaw and / or a temporal bone part that comprises the temporomandibular joint socket, and a second model (20), which represents at least one part of the lower jaw, are ascertained therefrom.A movement curve of the second model (20, 20') relative to the first model (50) is calculated and displayed using the marker movement curve (7).

An all-trans wrist joint prosthesis retaining the function of a distal radioulnar joint comprises a carpal bone base, a carpal bone joint fossa, a movable ball and a radial handle, and a wrist bone marrow needle is arranged on the carpal bone base; the carpal joint fossa is connected with the carpal base through a connecting plate; the movable ball body is of an elliptical hemispheroid structure matched with the lower surface of the carpal joint fossa; the movable ball body is connected with the radius handle through the radius connecting plate, the radial bone marrow needle and the ulna bone marrow needle are arranged below the radius handle, a lock hole is formed in the upper surface of the ulna bone marrow needle, a limiting lock catch is arranged below the radius handle, and the ulna bone marrow needle is connected to the limiting lock catch through the lock hole. The defects in the prior art are overcome, and a larger movement range is obtained through the design of the reverse wrist joint; and through the detachable design of the carpal joint fossa and the movable ball body, the material cost for rebuilding is greatly reduced, and meanwhile, the angle of the prosthesis joint surface can be adjusted, so that the optimal palmar inclination angle and the optimal ulnar deflection angle can be conveniently adjusted, and the error-tolerant rate of osteotomy in an operation is improved.

The invention discloses a basis cranii-temporo-mandibular joint combination prosthesis, which comprises a basis cranii portion, a zygomatic arch portion, an articular fossa portion, a condylar process head portion and a joint handle, wherein the basis cranii portion, which is in charge of repairing basis cranii defect, is made from a titanium alloy material; a plurality of fixing holes are formed in the edge of the basis cranii portion, so that the basis cranii portion is fixed to temporal bone; the zygomatic arch portion, which is in charge of repairing zygomatic arch defect, is made from a titanium alloy material; a plurality of fixing holes are formed in the front end of the zygomatic arch portion, so that the zygomatic arch portion is fixed to zygomatic arch; the articular fossa portion is an articular surface capable of simulating mandibular movements of a human body, and the articular fossa portion is made from an ultrahigh molecular weight polyethylene material; the basis cranii portion, the zygomatic arch portion and the articular fossa portion are integrally connected; the condylar process head portion, which is made from a cobalt-chrome-molybdenum alloy material, is represented as a hollow cylindrical structure; the joint handle, which is made from a titanium alloy material, is used for repairing partial ascending limbs; a fixing hole is formed in the joint handle; and the condylar process head portion and the joint handle are integrally connected. The best effect can be achieved since different parts are made from different materials; and the individual basis cranii portion, zygomatic arch portion and articular fossa portion as well as the condylar process head portion and the joint handle, which are made from special materials, are integrally connected, so that the prosthesis is more stable and firmer and is better in fixing effect.

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.

Customizable scapular anchor (1) for fixing a glenoid component of a shoulder joint prosthesis to a patient's scapula with compromised anatomy, comprising a glenoid support (2), said glenoid support (2) being defined by a pin element (3) for fixing said glenoid component to said scapular anchor (1) and by a flange (4) integral with said pin element (3), said flange (4) having a distal surface (5) adapted to be placed at least partially in contact with a glenoid cavity of said scapula and a proximal surface (6) opposite said distal surface (5); wherein at least one customized portion (5, 7, 8) is specifically shaped with respect to the bone morphology of a single patient's scapula with compromised anatomy; the customized portion (5, 7, 8) comprises at least one coracoid support projection (7) arranged to abut at a coracoid process (52) of the scapula (50).

The invention discloses an industrial robot capable of detecting the wear degree of joints in real time and belongs to the field of robots. The industrial robot capable of detecting the wear degree ofthe joints in real time. Through arrangement of fixed-point detection layers and under the actions of wear-resistant particles in pre-reminding layers, the time that wear occurs at the joints can beeffectively delayed. When wear occurs to one joint, sunken deformation can occur to one or both of an articular head and a articular fossa of the worn part, pressure data detected by two pressure sensors in the same balance detection layer can lose balance to generate a certain pressure difference. The wear condition can be judged according to the pressure difference. Meanwhile, the worn point canbe judged. When receiving a wear signal, a control system can control spines to pierce reminding inhibiting balls adjacent to the worn point. On the one hand, continuous expansion of the wear phenomenon is effectively suppressed, and on the other hand, working staff can be reminded visually of timely maintenance, and the service life is prolonged.

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.

A centric relation position demonstration device comprises a base plate, an upper rack, a lower jaw simulation rack, an upper dental cast, and a lower dental cast; the application method comprises thefollowing steps: A, preparing the upper dental cast and the lower dental cast according to teaching demands; B, fitting the upper dental cast with the lower dental cast; C, enabling the upper and lower dental casts to form centric bite, and observing motion relations in the centric bite; D, simulating different centric relation positions, and observing influences on biting relations by differentcentric relation positions. The centric relation position demonstration device application method can directly display teeth biting relation changes caused by changes of position relations between a condyle and an articular fossa, thus providing clear and direct feelings for dentistry students and oral cavity clinic doctors to understand and analyze the centric relation positions.

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 device for recording, locating and recovering the positional relationship of the condyle during mandibular ramus sagittal splitting operation, which includes a position recording component, an upper universal retaining arm, a lower universal retaining arm, a ball and socket structure and a central locking structure. The location record component includes an upper record component and a lower record component. The upper and lower ends of the central locking structure are respectively connected to the end of the upper universal retention arm and the lower universal retention arm, and the other end of the upper universal retention arm is connected by a ball and socket structure for recording the maxillary The upper recording component of the position, and the other end of the lower universal retaining arm is connected to the lower recording component for recording the position of the condyle through a ball and socket structure. The device digitizes the spatial positional relationship of the condyle in the glenoid fossa of the temporal bone, records and reproduces the position of the condyle before and after the operation, has high accuracy and repeatability, and can make the mandibular ramus sagittal split the condyle before and after the operation The position of the process in the temporal bone joint fossa remains unchanged, and the clinical application is accurate and convenient.