Methods and devices for less invasive glenoid replacement
The invention relates to a glenoid (shoulder socket) implant prosthesis, a humeral implant prosthesis, devices for implanting glenoid and humeral implant prostheses, and less invasive methods of their use for the treatment of an injured or damaged shoulder.
1. A glenoid implant, comprising:
a circular body, having a medial surface, an articulating surface, a peripheral edge, and a central axis, a wall that extends axially from the peripheral edge along a circumference of the circular body, the wall having a circular cross section;
a post on the medial surface, disposed concentrically on the central axis;
at least one axially extending flange extending from the medial surface; and
at least one radially inwardly extending annular channel on the circular body that extends radially inward from the wall of the circular body.
2. A glenoid implant as in claim 1 , wherein the at least one flange extends around at least about 75% of the peripheral edge of the circular body.
3. A glenoid implant as in claim 1 , wherein the circular body has a first thickness measured in the axial direction at a first point on the peripheral edge, and a second thickness measured in the axial direction at a second point on the peripheral edge spaced apart from the first point by 180 degrees, and the first thickness is substantially equal to the second thickness.
4. A glenoid implant as in claim 1 , wherein the circular body has a first thickness measured in the axial direction at a first point on the peripheral edge, and a second thickness measured in the axial direction at a second point on the peripheral edge spaced apart from the first point by 180 degrees, wherein the first thickness is at least about 125% of the second thickness.
5. A glenoid implant as in claim 1 , wherein the circular body has a first thickness measured in the axial direction at a first point on the peripheral edge, and a second thickness measured in the axial direction at a second point on the peripheral edge spaced apart from the first point by 180 degrees, wherein the first thickness is at least about 150% of the second thickness.
6. A glenoid implant as in claim 1 , wherein the circular body has a first thickness measured in the axial direction at a first point on the peripheral edge, and a second thickness measured in the axial direction at a second point on the peripheral edge spaced apart from the first point by 180 degrees, wherein the first thickness is at least about 200% of the second thickness.
7. A glenoid implant, comprising:
a circular body, having a medial surface, an articulating surface, a peripheral edge, and a central axis, a wall that extends axially from the peripheral edge along a circumference of the circular body, the wall having a circular cross section;
a post on the medial surface, disposed concentrically on the central axis;
at least one radially inwardly extending annular channel on the circular body that extends radially inward from the wall of the circular body; and
a first thickness measured in the axial direction at a first point on the peripheral edge, and a second thickness measured in the axial direction at a second point on the peripheral edge spaced apart from the first point by 180 degrees;
wherein the first thickness is at least about 125% of the second thickness.