Shoulder joint prosthesis
AssigneeCenterpulse Orthopedics Ltd.
InventorsMarkus Rauscher, Peter Wendt
Life of this patent
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Abstract
The invention relates to a shoulder joint prosthesis comprising two cooperating bearing bodies, a shaft and a coupling for the connection of the shaft to one of the bearing bodies, with a support member adjoining the lower side of the bearing member connectable to the shaft, an outer support surface of said support member at least partly filling a gap present between the bearing body and the shaft in the state connected to the shaft such that the growing together of bone fragments is promoted.
Claims14
A shoulder joint prosthesis comprising two cooperating bearing bodies (11), a shaft (13) and a coupling (15) for the connection of the shaft (13) to one of the bearing bodies (11), wherein a support member (21) adjoins a lower side (19) of the bearing body (11) connectable to the shaft (13), an outer support surface (23) of said support member (21) at least partly filling a gap present between the bearing body (11) and the shaft (13) in the state connected to the shaft (13) such that the growing together of bone fragments is promoted;
- wherein the shaft (13) is provided with a support element (27), having a basket-like or quiver-like shape, which is mounted laterally at the shaft (13) and whose outer side forms a jacket surface of the shaft (13) merging into the support surface (23) of the support member (21) in the region of the transition from the shaft (13) into the support member (21);
- and
- wherein the support element (27) is provided with apertures (29).
A shoulder joint prosthesis comprising two cooperating bearing bodies (11), a shaft (13) and a coupling (15) for the connection of the shaft (13) to one of the bearing bodies (11), wherein a support member (21) adjoins a lower side (19) of the bearing body (11) connectable to the shaft (13), an outer support surface (23) of said support member (21) at least partly filling a gap present between the bearing body (11) and the shaft (13) in the state connected to the shaft (13) such that the growing together of bone fragments is promoted;
- and
- wherein, when the bearing body (11) is connected to the shaft (13), at least one recess (31) is present between the shaft (13) and the support member (21) at which a tool can be positioned to release the bearing body (11) from the shaft (13).
A shoulder joint prosthesis comprising two cooperating bearing bodies (11), a shaft (13) and a coupling (15) for the connection of the shaft (13) to one of the bearing bodies (11), wherein a support member (21) adjoins a lower side (19) of the bearing body (11) connectable to the shaft (13), an outer support surface (23) of said support member (21) at least partly filling a gap present between the bearing body (11) and the shaft (13) in the state connected to the shaft (13) such that the growing together of bone fragments is promoted;
- wherein the shaft (13) is provided with a support element (27), having a basket-like or quiver-like shape, which is mounted laterally at the shaft (13) and whose outer side forms a jacket surface of the shaft (13) merging into the support surface (23) of the support member (21) in the region of the transition from the shaft (13) into the support member (21);
- and
- wherein, with respect to the orientation of the support element (27) in the implanted state with the shaft axis (143) extending perpendicular to the transverse plane, the ratio X/Y of the maximum outer diameter of the support element (27) in the sagittal direction X and the maximum outer diameter of the support element (27) in the transverse direction Y lies in the range from 0.85 to 0.95.
Dependencies are inferred from the claim text.