Stemless metaphyseal humeral implant
AssigneeHowmedica Osteonics Corp.
InventorsDaniel E. Sapio, Ashish Mehta, Andrew J. Nelson, Bernhard Hofstaetter, Sunny Shorabh
Life of this patent
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Abstract
A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The base may include a proximal collar having a proximal surface and a bone-engaging surface opposite the proximal surface. The collar may have a superior portion and an inferior portion, the superior portion defining an arc shape and the inferior portion defining a substantially triangular shape.
Claims21
A base member of a stemless shoulder implant, the base member comprising:
- a proximal collar having a proximal surface and a bone-engaging surface opposite the proximal surface with a side wall extending therebetween, the proximal surface having a superior portion and an inferior portion, the superior portion defining an arc shape and the inferior portion defining a substantially triangular shape tapering from the superior portion to an apex, the superior portion and the inferior portion defining a perimeter of the proximal collar, the bone-engaging surface including a porous surface configured to allow bone ingrowth into the base member;
- and
- a plurality of peripheral supports positioned radially outwardly of a longitudinal axis of the base member and extending distally from the side wall, the plurality of peripheral supports including a first peripheral support extending distally from the apex of the inferior portion, at least one peripheral support defining a concave inner surface configured to enhance fixation of the base member to a bone.
A base member of a stemless shoulder implant, the base member comprising:
- a proximal collar having a proximal surface and a bone-engaging surface opposite the proximal surface with a side wall extending therebetween, the proximal surface having a superior portion and an inferior portion, the superior portion defining an arc shape and the inferior portion defining a substantially triangular shape tapering from the superior portion to an apex, the superior portion and the inferior portion defining a perimeter of the proximal collar;
- and
- a plurality of peripheral supports positioned radially outwardly of a longitudinal axis of the base member and extending distally from the side wall, the plurality of peripheral supports including a first peripheral support extending distally from the apex of the inferior portion, at least one peripheral support defining a concave inner surface and an outer surface with grooves, the grooves including a porous material configured to enhance fixation of the base member to a bone.
Dependencies are inferred from the claim text.