Provided is a novel joint replacement prosthesis that includes a base component, and one or more modular stems. The base component includes a bone-facing surface including one or more stem connectors configured for receiving and forming connections with the one or more modular stems inserted from the bone-facing surface side.

The present invention relates to an improved glenoid anchor for a shoulder joint prosthesis, in particular a convertible prosthesis, of the type intended to be fixed to the glenoid cavity of the shoulder blade and comprising: —a pin (2) with an internally hollow and essentially thimble-like conical sleeve (12), which has a tapered distal end (3) and an open proximal end (4); —an annular recess (15) formed inside the cavity (13) of the pin (2) in the vicinity of said open proximal end (4), for receiving by means of snap-engagement an edge (34) of a lug (30) of a prosthesis component (9); —at least one pair of oppositely arranged anti-rotation notches (16, 17) in the proximity of said annular groove (15) for receiving by means of snap fit oppositely arranged teeth (18, 19) of the same lug (30) intended to be snap-engaged together with said pin (2).

A glenoid anchor for a shoulder joint prosthesis, fixed to a glenoid cavity of a shoulder blade. The glenoid anchor consists only of a structurally independent pin, with an internally hollow conical sleeve, which has a tapered distal end configured for being directly fixed to the glenoid cavity and an open proximal end configured for being removably attached to a prosthesis component. The prosthesis component is a lug of either one of an anatomical prosthesis or a reverse prosthesis. The glenoid anchor is configured for removal of said lug in order to convert the anatomical prosthesis to the reverse prosthesis or vice-versa, while keeping the structurally independent pin inside the glenoid cavity. An outer surface of the sleeve of said pin has a trabecular structure for favouring osteogenesis and bone integration. The pin further comprises an annular recess formed inside an internal cavity of the pin, for receiving by means of mechanical interference an edge of the lug of the prosthesis component, substantially locking the lug inside the internal cavity.

An acetabular cup assembly includes a shell and a liner. The shell has an inner surface, an outer surface, a face positioned at an upper end of the shell, and an apex positioned at a lower end of the inner surface. The inner surface includes a tapered inner wall and a plurality of inwardly-facing recesses provided along the inner surface adjacent the face. The plurality of inwardly-facing recesses include a main portion and an asymmetrically-extending portion. Each of the asymmetrically-extending portions extend circumferentially in one direction resulting in the recesses having an asymmetric shape. The segmented portion of the tapered inner wall has a wide portion between the asymmetrically-extending portion and the face and a narrower portion between the asymmetrically-extending portion and the adjacent inwardly-facing recess. The liner is adapted to fit within the shell and engage the inner surface of the shell establishing an interference fit.

An acetabular cup assembly includes a shell and a liner. The shell has an inner surface, an outer surface, a face positioned at an upper end of the shell, and an apex positioned at a lower end of the inner surface. The inner surface includes a tapered inner wall and a plurality of inwardly-facing recesses provided along the inner surface adjacent the face. The plurality of inwardly-facing recesses include a main portion and an asymmetrically-extending portion. Each of the asymmetrically-extending portions extend circumferentially in one direction resulting in the recesses having an asymmetric shape. The segmented portion of the tapered inner wall has a wide portion between the asymmetrically-extending portion and the face and a narrower portion between the asymmetrically-extending portion and the adjacent inwardly-facing recess. The liner is adapted to fit within the shell and engage the inner surface of the shell establishing an interference fit.

The present disclosure provides, in certain aspects, unique methods and systems for connecting orthopedic components. In some forms, a male-type projection of a first orthopedic component is securely lodged within a female-type aperture in a second orthopedic component. In one embodiment, the projection, while received through a proximal entryway in the aperture, includes a first longitudinal region with deformed surface elements that provide a first securing zone within the aperture and a second longitudinal region with deformed surface elements that provide a second securing zone within the aperture. The first securing zone is located proximate the distal end of the projection, and the second securing zone is located proximate the proximal entryway of the aperture.

A method and apparatus is provided for use in spinal fusion procedures. An interbody fusion device has a first piece that is a load bearing device designed to bear the axial loading from the end plates of adjacent vertebrae. A second piece of the interbody fusion device is a retention device whose function is to prevent migration of the load bearing device. One or more fasteners secure the retention device to the vertebrae above and below the load bearing device. The fasteners cause the end plates of the vertebrae to compress the end plates to the load bearing device to facilitate proper fusion. The second piece can be configured to include lips that abut the apothyseal rings during, with the plate including bores angled such that fasteners penetrate the apothyseal rings.

The present invention relates to an improved glenoid anchor for a shoulder joint prosthesis, in particular a convertible prosthesis, of the type intended to be fixed to the glenoid cavity of the shoulder blade and comprising:a pin (2) with an internally hollow and essentially thimble-like conical sleeve (12), which has a tapered distal end (3) and an open proximal end (4);an annular recess (15) formed inside the cavity (13) of the pin (2) in the vicinity of said open proximal end (4), for receiving by means of snap-engagement an edge (34) of a lug (30) of a prosthesis component (9);at least one pair of oppositely arranged anti-rotation notches (16, 17) in the proximity of said annular groove (15) for receiving by means of snap fit oppositely arranged teeth (18, 19) of the same lug (30) intended to be snap-engaged together with said pin (2).

Provided is a novel joint replacement prosthesis that includes a base component, and one or more modular stems. The base component includes a bone-facing surface including one or more stem connectors configured for receiving and forming connections with the one or more modular stems inserted from the bone-facing surface side.

An expandable implant having an insertion direction to be placed in an intervertebral space, including a first section having a first bone-engaging surface, a second section having a second bone-engaging surface arranged opposite to the first section, the first and second bone-engaging surfaces arranged to be substantially in parallel to the insertion direction, an interconnection structure interconnecting the first section and the second section, at least one portion of the interconnection structure being deformable to allow for a change of a distance and/or orientation between the first section and second section, and a first partial inner cylindrical thread structure arranged between the first section and the second section, the first partial inner cylindrical thread structure having a thread axis, the thread axis being oblique to the insertion direction by a first angle 1.