Glenoid implant

Patent metadata

Field	Value
Publication number	US-9844440-B2
Application number	US-201414459935-A
Country	US
Kind code	B2
Filing date	Aug 14, 2014
Priority date	Aug 14, 2014
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A glenoid implant is provided and may include a body portion and a stem portion. The stem portion may extend from the body portion along a longitudinal axis. The body portion may include an articular side and a bone-engaging side opposite the articular side. At least a portion of the bone-engaging side may be disposed at a non-parallel angle relative to at least a peripheral edge of the articulation side.

First claim

What is claimed is:

1. A glenoid implant comprising:
a body portion; and
a stem portion formed separately from the body portion and attachable to the body portion such that when attached, the stem portion extends from the body portion along a longitudinal axis,
the body portion having an articular side and a bone-engaging side opposite the articular side,
at least a portion of the bone-engaging side disposed at a non-parallel angle relative to at least a peripheral edge of the articular side,
the bone-engaging side including a bone-engaging surface that is convex at each location on the bone-engaging surface,
the bone-engaging surface extending fully around a periphery of the bone-engaging side,
the bone-engaging surface including a first portion and a second portion,
the first portion having a first peripheral edge disposed at a first angle α 1 relative to at least the peripheral edge of the articular side,
the second portion having a second peripheral edge disposed at a second, different angle α 2 relative to at least the peripheral edge of the articular side,
the body portion including a plurality of apertures extending through the body portion between the articular side and the bone-engaging side,
the stem portion including a concavely radiused surface adjacent the bone-engaging side and encircling the stem portion, the concavely radiused surface extending radially outward and intersecting at least one of the apertures.

2. The glenoid implant of claim 1 , wherein the first portion extends about the longitudinal axis by an angle θ.

3. The glenoid implant of claim 2 , wherein the angle θ is substantially equal to 180°.

4. The glenoid implant of claim 1 , wherein the articular side is configured to partially receive a humeral head.

5. The glenoid implant of claim 4 , wherein at least a portion of the articular side includes a surface that is concave and substantially spherical.

6. The glenoid implant of claim 1 , wherein the articular side is configured to receive a glenosphere.

7. A glenoid implant comprising:
a stem portion having a longitudinal axis; and
a body portion formed separately from the stem portion and attachable to the stem portion such that when attached, the body portion is carried at a proximal end of the stem portion,
the body portion including an articular side, a bone-engaging side opposite the articular side, and a peripheral sidewall extending between the articular side and the bone-engaging side,
the peripheral sidewall having a depth parallel to the longitudinal axis,
at least a portion of the peripheral sidewall increasing in depth in a direction perpendicular to the longitudinal axis,
the bone-engaging side including a bone-engaging surface that is convex at each location on the bone-engaging surface,
the bone-engaging surface extending fully around a periphery of the bone-engaging side,
the body portion including a plurality of apertures extending through the body portion between the articular side and the bone-engaging side,
the stem portion including a concavely radiused surface adjacent the bone-engaging side and encircling the stem portion, the concavely radiused surface extending radially outward and intersecting at least one of the apertures.

8. The glenoid implant of claim 7 , wherein a first portion of the bone-engaging side has a first peripheral edge disposed at an angle relative to a peripheral edge of the articular side, and a second portion of the bone-engaging side has a second peripheral edge that is parallel to the peripheral edge of the articular side.

9. A glenoid implant comprising:
a body portion; and
a stem portion formed separately from the body portion and attachable to the body portion such that when attached, the stem portion extends from the body portion along a longitudinal axis,
the body portion having an articular side,
at least a portion of the articular side including a surface that is concave and substantially spherical,
the body portion having a bone-engaging side opposite the articular side,
the bone-engaging side including a bone-engaging surface that is convex at each location on the bone-engaging surface,
the bone-engaging surface extending fully around a periphery of the bone-engaging side,
the bone-engaging surface including a first portion having a first peripheral edge disposed at a first angle α 1 relative to at least a peripheral edge of the articular side and extending about the longitudinal axis by an angle θ substantially equal to 180°,
the bone-engaging surface further including a second portion having a second peripheral edge disposed at a second, different angle α 2 relative to at least the peripheral edge of the articular side,
at least a portion of the bone-engaging side disposed at a non-parallel angle relative to at least the peripheral edge of the articular side,
the body portion including a plurality of apertures extending through the body portion between the articular side and the bone-engaging side,
the stem portion including a concavely radiused surface adjacent the bone-engaging side and encircling the stem portion, the concavely radiused surface extending radially outward and intersecting at least one of the apertures.

Assignees

• Biomet Mfg Llc

Inventors

• Kovacs Michael Francis
• Mcdaniel John M
• Winslow Nathan A
• Vanasse Thomas M
• Wack Michael A

Classifications

• A61F2002/30331

  made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit · CPC title

• A61F2/4081 Primary

  Glenoid components, e.g. cups · CPC title

• A61F2002/30879

  Ribs · CPC title

• A61F2002/30881

  Circumferential ribs, flanges or fins · CPC title

• A61F2/30749

  Fixation appliances for connecting prostheses to the body · CPC title