33 results about "GLENOID FOSSA PROSTHESIS" patented technology

In a first aspect the present invention provides a glenoid prosthesis assembly for use in shoulder joint arthroplasty to address conditions where deterioration of the rotator cuff mechanism of the shoulder joint is severe, the assembly comprising a first shell component to be affixed to a scapula by fixing means, and a smaller second component adapted to nest within the first component and having an articulation surface for articulating with a humeral head, the first component being over-sized relative to the glenoid surface of a scapula whereby the first component may be first affixed to at least two of the glenoid, acromion and coracoid processes of the scapula in use by the fixing means and the second component may be cemented in place within the first component allowing initial adjustability in the poise of the second component relative to the first component. Amongst other aspects the invention also provides a modular proximal humeral prosthesis system for use in shoulder joint arthroplasty which enables the proximal humeral prosthesis to be changed between anatomical and reverse of anatomical configurations to address differing degrees of shoulder joint deterioration.

A glenoid prosthesis for use in total shoulder arthroplasty. The glenoid prosthesis has a concave articulating plate that can interact with the humeral component of an artificial shoulder joint, and a backing for connecting and bonding the prosthesis to the human scapula. The backing of the glenoid prosthesis can be made using hydroxyapatite, which forms a bond with human bone. The backing can further include means for connecting, such as pegs or a keel, to facilitate the connection of the glenoid prosthesis with the scapula.

An expandable shoulder trial for a reverse shoulder system is described. The trial includes a rotatably adjustable insert housed within a humeral cup. The insert has a proximal end and a distal end, the proximal end having a concave recess therein adapted to receive a glenosphere prosthesis. The distal end of the insert includes a shaft, the shaft having a helical groove disposed on at least a portion thereof. A distal end of the humeral cup is inserted in a humeral stem. The humeral cup has a proximal end including a recess therein, the recess defined by a circular wall. A guide pin protrudes from the circular wall and is adapted to engage the helical groove of the shaft of the insert. The proximal end of the insert may rotate along an axis toward the proximal end of the humeral cup and along the same axis away from the proximal end of the humeral cup.

Trials for a reverse shoulder system are described. The trials generally include an insert housed within a humeral cup. The insert has a proximal end and a distal end, the proximal end having a concave recess therein adapted to receive a glenosphere prosthesis. The distal end of the insert includes a shaft, the shaft is substantially housed within the confines of the humeral cup. A distal end of the humeral cup is inserted in a humeral stem.

Trials for a reverse shoulder system are described. The trials generally include an insert housed within a humeral cup. The insert has a proximal end and a distal end, the proximal end having a concave recess therein adapted to receive a glenosphere prosthesis. The distal end of the insert includes a shaft, the shaft is substantially housed within the confines of the humeral cup. A distal end of the humeral cup is inserted in a humeral stem.

The invention relates to a glenoid prosthesis applied to total shoulder joint replacement, and belongs to the technical field of medical instruments. The glenoid prosthesis comprises a glenoid implant and a glenoid support body; a groove is formed in the glenoid implant, two through holes are formed in the bottom surface of the interior of the groove, screws are inserted into the through holes, and the tail ends of the screws can be inserted into a bone canal in a shoulder joint; a plurality of evenly-distributed clamping blocks are fixedly connected to the inner wall of the groove; a plurality of clamping plates corresponding to the clamping blocks are fixedly connected to the surface, close to the glenoid implant, of the glenoid support body; protrusions are integrally formed on the side walls, close to the clamping blocks, of the clamping plates, and the protrusions can be clamped between the clamping blocks and the bottom face of the groove; inclined planes are arranged on the surfaces, close to each other, of the protrusions and the clamping blocks, and the inclined planes on the protrusions and the clamping blocks are opposite in inclination direction. The glenoid prosthesishas the effects that the glenoid implant is prevented from loosening, and the polyethylene part in the prosthesis is convenient to replace.

The invention relates to a method for surgical application of a glenoid anchor of a shoulder joint prosthesis and instruments advantageously used in the method. The method includes making a delto-pectoral incision providing a delto-pectoral access to a shoulder joint; with the delto-pectoral access being suitable for inserting at least one machining tool; and making a trans-deltoid incision providing a trans-deltoid access to the humeral head; with the trans-deltoid access being suitable for inserting a stem of a machining instrument to be mounted on the machining tool for machining the glenoid cavity.

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 glenoid fossa prosthesis and a joint prosthesis with the glenoid fossa prosthesis. An outer cup of the glenoid fossa prosthesis is arranged in a target bone; a liner is arranged in the outer cup; an articular head structure can be movably arranged in the liner; a first communicating channel which is communicated with a joint capsule is arranged on the outer cup; a second communicating channel which is communicated with the joint capsule is arranged in the liner; the first communicating channel is communicated with the second communicating channel so as to guide synoviato a contact surface between the liner and the articular head structure. According to the technical scheme of the invention, the problem of earlier failure of the joint prosthesis caused by high abrasion rate of a joint material resulted from a lack of effective lubrication on a friction surface of the joint prosthesis in the prior art can be solved.

In some embodiments, the present invention provides a reverse shoulder glenoid prosthesis which supports the attachment of multiple different types of modular attachments that can: 1) provide additional scapular fixation (ie external to the glenoid) in order to improve glenoid implant fixation in cases of severe bone loss/fracture, 2) provide joint line lateralization to improve tissue stability in cases of severe glenoid/scapula bone loss, 3) facilitate use and containment of glenoid bone graft in cases of severe glenoid/scapula bone loss—particularly in those cases in which the glenoid defect is uncontained/peripheral 4) achieve glenoid fixation while at the same time reconstructing the scapular bone in cases of scapula fractures, glenoid fractures, and/or acromial fractures, and 5) provide improved rTSA joint biomechanics, particularly posterior rotator cuff efficiency by changing the line of action of the infraspinatus and teres minor muscles to improve their muscle tension, and also increase each muscle's external rotation and abduction moment arm lengths.

A method of installing a prosthesis assembly includes installing a base component in a prepared glenoid vault, axially aligning a plurality of slots in one of a stretched glenoid bearing component and a base component with a plurality of ridges in the other of the glenoid bearing component and the base component, each of the plurality of slots having a maximum length which is greater than a maximum length of a respective one of the plurality of ridges, engaging each of the plurality of ridges with the respective one of the plurality of grooves thereby rotatably coupling the glenoid bearing component and the base component and limiting axial movement of the glenoid bearing component relative to the base component, and placing the bearing surface into articulating contact with a humeral head.

The invention discloses inverted type glenoid cavity prosthesis of a shoulder joint. The inverted type glenoid cavity prosthesis comprises a glenoid cavity prosthesis ball head, a glenoid cavity prosthesis base and a glenoid cavity prosthesis fixing piece, wherein one end of the glenoid cavity prosthesis base is connected with the glenoid cavity prosthesis ball head, and the other end of the glenoid cavity prosthesis base is connected with the glenoid cavity prosthesis fixing piece; the glenoid cavity prosthesis fixing piece comprises an upper locking fixing piece, a center locking fixing piece and a lower locking fixing piece; the center locking fixing piece is positioned at the center position of the glenoid cavity prosthesis fixing piece; the upper locking fixing piece and the lower locking fixing piece are respectively positioned on both sides of the center locking fixing piece to form an angle of 150 degrees. According to the inverted type glenoid cavity prosthesis, the effect of avoiding shoulder blade striking, reducing shear stress of the prosthesis and improving the stability of the prosthesis are greatly enhanced, so that the inverted type glenoid cavity prosthesis is worthy to be popularized and used in the field of shoulder joint replacement.

The invention belongs to the technical field of medical prosthesis, and discloses a glenoid cavity prosthesis and a shoulder joint prosthesis applying the same. The glenoid cavity prosthesis comprisesa prosthesis platform part and a prosthesis marrow rod, wherein the prosthesis platform part comprises a matching surface which is connected with a humeral head and an adhering surface which is opposite to the matching surface and is used for being attached to the bone section of the glenoid cavity of the human body; one end of the prosthesis marrow rod is fixedly connected with the adhering surface, and the other end of the prosthesis marrow rod is used for being transplanted to the marrow cavity of the glenoid cavity of the human body to be connected with the glenoid cavity of the human body; and the outline structure of the adhering surface is the same as the outline of the bone section of the glenoid cavity of the human body. Through the adoption of the glenoid cavity prosthesis disclosed by the invention, the stability after the prosthesis is transplanted can be effectively improved.