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 peg on the medial surface, disposed concentrically on the central axis;
wherein the medial surface extends radially outwardly to become a portion of the peripheral edge, wherein the portion of peripheral edge is concentric to and surrounds the peg; and
a channel located on the peripheral edge and separating the portion of the peripheral edge that becomes the medial surface from a remaining portion of the peripheral edge, wherein the channel extends circumferentially around the peripheral edge and wherein the channel is concentric with the center of the circular body; and
wherein a diameter of the circular body between the channel and the articulating surface is larger than a diameter of the circular body at the channel.
2. The glenoid implant of claim 1 , wherein the portion of the peripheral edge is circular.
3. The glenoid implant of claim 1 , wherein the portion of the peripheral edge is continuous.
4. The glenoid implant of claim 1 , wherein the portion of the peripheral edge is aligned with the remaining portion of the peripheral edge.
5. The glenoid implant of claim 1 , wherein a medial surface of the portion of the peripheral edge is flat.
6. The glenoid implant of claim 1 , further comprising an annular fin located on the peg.
7. 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.
8. 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 wherein the first thickness is at least about 125% of the second thickness.
9. 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 wherein the first thickness is at least about 150% of the second thickness.
10. 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 wherein the first thickness is at least about 200% of the second thickness.