16 results about "Shoulder Prosthesis" patented technology

A shoulder prosthesis baseplate (100) comprising a through-hole (102) for a compressive screw (101), wherein the through-hole (102) has a circular profile section and comprises a projecting edge (106) arranged internally and perpendicularly to an axis (102j of the through-hole (102), the projecting edge (106) being configured to axially retain a head (103) of the compressive screw (101) inserted in the through-hole (102). The projecting edge (106) has circular are shape and delimits a corresponding free portion (108) of the circular profile section internally to the through-hole (102), the free portion (108) being configured to allow the screwing passage of a threaded stem (104) of the compressive screw (101) to surpass the projecting edge (106).

The present disclosure provides a shoulder prosthesis. The shoulder prosthesis includes a glenoid component, a humeral component, and an articulation component. The glenoid component includes a glenoid body having a proximal side and a distal side, the distal side shaped to engage with a resected portion of a glenoid cavity. The humeral component includes a humeral body having a proximal side and a distal side, the distal side shaped to engage with a resected portion of a humerus. The articulation component is positionable between the proximal side of the glenoid component and the proximal side of the humeral component, the articulation component configured to be maintained between the glenoid and humeral components, after implantation, by at least one of a deltoid muscle and a rotator cuff.

A humeral anchor for a shoulder prosthesis is disclosed. The humeral anchor includes a distal portion configured to be anchored in a proximal region of a humerus and a proximal portion, the proximal portion including a proximal face, where the proximal face includes an engagement feature configured to directly couple to a reverse shoulder insert having a concave proximal portion, and wherein the proximal face is further configured to directly couple with an anatomical shoulder insert having a convex proximal portion.

The invention relates to a humeral anchoring element (2) of a humeral joint component (4, 4') of a shoulder prosthesis, the humeral anchoring element (2) being characterized in that it comprises: - a main body (8) for insertion into a humerus (16) from a resected metaphyseal surface (10), and - a proximal flange (12) forming a proximal end of the humeral anchoring element (2) and positioned at one end of the main body (8), a proximal face (14) of the proximal flange (12) extending into the humerus (16) and below the resected metaphyseal surface (10). Figure for the abstract: Figure 1

A universal shoulder prosthesis system includes and one or more modular components that are exchangeable between ta-TSR and r-TSR. In at least one embodiment, the humeral components that contact the glenoid components include polyethylene while the glenoid components that contact the humeral components are all metal. An example of the modular components for ta-TSR are a glenoid modular component (200) having a concave cavity (212) and a humeral modular component (300) includes an outer shell (310) and an inner head (320) that fits into the outer shell (310). An example of the modular components for r-TSR are a glenosphere (516), which is the glenoid modular component (500), having a 10 degree inferior tilt built-in and a humeral cup (600), which is the humeral modular component, with a replaceable shell (650) that partially sits within a base (610), which optionally may include metal.

This invention comprises base plate and glenosphere designs, as well as cutting guides and holder instruments, developed to provide stronger fixation with a more minimally invasive approach to the shoulder in patients undergoing reverse shoulder arthroplasty for any reason. This newly developed technique allows for surgical operation in a more confined space, particularly in challenging cases such as tight shoulders. In addition, it offers advantages such as being usable as an alternative technique in osteoporotic patients with high cortical fixation and in revision surgeries or in cases with reduced bone stock due to various reasons. In standard base plate designs, it is known that fixation is predominantly achieved in the trabecular bone by screws inserted from the reamed peripheral bone surface surrounding the implant. However, in osteoporotic patients, trabecular bone becomes weakened and the bone stock may not provide sufficient support. Furthermore, version differences related to anatomical variations of the glenoid seen among patients may cause problems in component placement and screw insertion if proper preoperative assessment is not performed. Moreover, in classical component design, in order to send the guidewire in the correct direction corresponding to the surface where the central peg will be applied, soft tissue dissection exposing the entire glenoid must be performed. Performing this dissection may pose challenges for the surgeon in tight shoulders, increase the duration of surgery, and carry risks of complications such as instability or injury to neurovascular structures. In addition, in classical component design, the acceptable threshold of contact between the glenoid and base plate is considered to be 80%. If this is not achieved, implant failure may occur after prosthesis application. When the contact surface between the glenoid and base plate falls below 50%, graft application becomes indicated. Although it is a successful method, it is technically demanding, and in cases of graft non-union, alternative options are limited. Another method is the use of augment components for the defective area. This application not only presents high technical difficulty but also requires well-prepared three-dimensional preoperative planning. Custom-made implants are another option and are technically the most laborious and expensive to manufacture. With this invention, compared to previous techniques, the management of glenoid defect and excessive version problems can be achieved by providing higher cortical fixation with anterior-weighted support.

Prosthetic component provided with a stem, adapted to be implanted in use at a bone of a patient, such as for example a tibial and / or femoral component of a knee prosthesis or a femoral component of a hip prosthesis or a humeral component of a shoulder prosthesis, or a component of an elbow prosthesis, including a device adapted to externally cover and / or to house at its interior at least the stem of the prosthetic component, wherein the device is in use placed between the prosthetic component and the bone of the patient, suitable to stably constrain in use the prosthetic component to the bone of the patient and to prevent the direct contact between prosthetic component and bone of the patient.

This utility model provides a quick-assembly glenoid prosthesis, relating to the field of medical device technology. Its key technical features include a base and a glenoid head, as well as a connector and a locking device. The base includes a base plate and a limiting post. In the initial state, the connector and the locking device are assembled with the glenoid head. The glenoid head is hemispherical with a groove at its bottom and a through hole at its top, communicating with the groove. The connector is fixed within the groove, and the locking device passes through the connector. After installation, the base plate abuts against the bottom of the groove, and the locking device is inserted into the limiting post. The design of the connector and locking device allows the glenoid head to be accurately and quickly assembled with the glenoid base in a confined surgical space, reducing surgical time and lowering the incidence of postoperative complications.

A device for anchoring a shoulder prosthesis in a reverse configuration includes a baseplate delimited at the bottom by a first at least partially convex surface, and at the top by a second concave surface, opposite the first surface, and peripherally by a third truncated-cone or cylindrical surface; and a central pin, protruding from the first surface at a first end thereof, and defining an axially pass-through inner duct having at least one main diameter. The central pin has a second free end, opposite the first end. The duct has a helical cavity made in the inner wall delimiting the duct, open towards the inside of the duct and extending along the length of the duct. The inner duct has a secondary diameter smaller than the main diameter, and the helical cavity has a diameter larger than the main diameter of the inner duct.

A reverse shoulder prosthesis system is provided. The system can include a the convex surface of the glenosphere and the concave surface of the humeral socket. The convex surface, a humeral socket can have a concave surface, and a cup is positioned between cup can be moveable relative to the glenosphere and to the humeral socket.

To provide a stemless upper arm bone anchor with a stem for use in treatment of shoulder arthroplasty.SOLUTION: An upper arm bone anchor 203 includes a first end, a second end, and an inner surface extending in between the first end and the second end. The inner surface may be arranged around a recess 231 arranged in between the first end and the second end. The recess can be configured such that a connection part of a shoulder joint body is fixed directly to the inner surface.SELECTED DRAWING: Figure 3A-1

A shoulder prosthesis baseplate (100) comprising a through-hole (102) for a compressive screw (101), wherein the through-hole (102) has a circular profile section and comprises a projecting edge (106) arranged internally and perpendicularly to an axis (102') of the through-hole (102), the projecting edge (106) being configured to axially retain a head (103) of the compressive screw (101) inserted in the through-hole (102). The projecting edge (106) has circular arc shape and delimits a corresponding free portion (108) of the circular profile section internally to the through-hole (102), the free portion (108) being configured to allow the screwing passage of a threaded stem (104) of the compressive screw (101) to surpass the projecting edge (106).

A humeral anchor for a shoulder prosthesis is disclosed. The humeral anchor includes a distal portion configured to be anchored in a proximal region of a humerus and a proximal portion, the proximal portion including a proximal face, where the proximal face includes an engagement feature configured to directly couple to a reverse shoulder insert having a concave proximal portion, and wherein the proximal face is further configured to directly couple with an anatomical shoulder insert having a convex proximal portion.

A method for implanting a shoulder prosthesis includes distracting a gleno-humeral joint, inserting into the distracted joint a hollow main body having a substantially cylindrical or truncated-cone shape, laterally accessing inside the hollow main body through a second opening defined by at least one lateral element, and performing at least one of bone machining of the glenoid cavity and implantation of one or more glenoid prosthesis components through the first opening while the main body maintains the joint distracted. The main body includes a first end configured to abut a humeral portion, and a substantially annular second end configured to abut a glenoidal portion. The substantially annular second end defines a first opening sized to surround a glenoid cavity. The at least one lateral element maintains a three-dimensional spaced structure between the first and second ends.

An apparatus and modeling method of the present invention includes the successive steps of generating cartographic data representative of points belonging to a glenoid surface; distinguishing from among the cartographic data a first group of cartographic data corresponding to a first part of the glenoid surface, the first surface part being situated farthest down in the vertical direction in relation to the scapula; calculating from the first group of cartographic data a first ellipsoid portion that coincides substantially with the first surface part; and obtaining a theoretical glenoid surface from the first ellipsoid portion. By virtue of the theoretical glenoid surface obtained by this method, it is possible to assist the surgeon in optimizing the position of implantation of a glenoid component and to produce a glenoid component “made to measure” for the scapula that is to be fitted with a prosthesis.