Glenoid implant for minimally invasive shoulder replacement surgery
A glenoid implant is disclosed which has a protruding surface on a first side arranged to engage the surface of a cavity formed in a glenoid extending between peripheral glenoid surfaces and a flat surface adjacent the protruding surface of the implant arranged to engage the peripheral glenoid surfaces adjacent the cavity. The implant also has a wear-resistant surface on a second side opposite the flat surface and the protruding surface.
1. A glenoid implant comprising
a shell having
a protruding surface on a first side arranged to engage the surface of a cavity formed in a glenoid extending between peripheral glenoid surfaces, and
a flat surface on the first side adjacent the protruding surface arranged to engage the peripheral glenoid surfaces adjacent the cavity, and
a wear-resistant articulating surface on a second side opposite the flat surface and the protruding surface.
2. The implant of claim 1 wherein said shell includes a cannulation.
3. The implant of claim 2 which includes a first cannulation arranged to accept a screw compressing the wear-resistant surface into the cavity.
4. The implant of claim 3 which includes cannulations arranged to angularly dispose screws into the glenoid.
5. The implant of claim 4 in which the angularly disposed screws are directed into engagement in a peripheral cortex of the glenoid.
6. The implant of claim 5 in which at least some of the angularly disposed screws are held in locking engagement with the shell and in a fixed depth and direction in the glenoid.
7. The implant of claim 1 wherein said shell includes an ingrowth material to promote bone growth and adhesion of said shell to a glenoid surface.
8. The implant of claim 1 wherein the wear-resistant surface has a thickness dimension.
9. The implant of claim 8 wherein the wear-resistant surface is adapted to extend into the cavity.
10. The implant of claim 1 wherein the wear-resistant surface has a first thickness dimension adjacent one peripheral glenoid surface greater than a second thickness dimension of the wear-resistant surface adjacent a peripheral glenoid surface spaced apart from the first thickness dimension.
11. A glenoid implant comprising
a protruding surface on a first side arranged to engage the surface of a cavity formed in a glenoid extending between peripheral glenoid surfaces, and
a substantially planar wear-resistant articulating surface on a second side opposite the protruding surface.