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 post on the medial surface, disposed concentrically on the central axis; 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,
wherein the articulating surface comprises a non-spherical shape defined by a complete rotation of an arc of a first, constant radius about an axis of rotation passing through the longitudinal midpoint of the articulating surface.
2. A glenoid implant as in claim 1 , wherein the first thickness is at least about 150% of the second thickness.
3. A glenoid implant as in claim 1 , wherein the first thickness is at least about 200% of the second thickness.
4. The glenoid implant of claim 1 , wherein the axis of rotation is offset from the central axis.
5. The glenoid implant of claim 1 , wherein the constant radius is between approximately 70 and 100 mm.
6. The glenoid implant of claim 1 , wherein a radius of the circular body is between about 10 and about 27 mm.