Claims
- 1. A tibial prosthesis comprising:
a tibial tray having a medial-lateral center and an inferior surface matable with a resected proximal tibia; a modular keel fixable to the inferior surface and adjustable in a medial-lateral direction with respect to the medial-lateral center of the tibial platform.
- 2. The prosthesis of claim 1, further comprising a stem receivable within the central canal of a tibia.
- 3. The prosthesis of claim 2, wherein the stem is modular and matable with the modular keel.
- 4. The prosthesis of claim 1, wherein the tibial tray includes at least one slot extending in a medial-lateral direction and at least one mating element, fixable to the modular keel, extends through the at least one slot to secure the modular keel to the tibial tray at a preselected offset from the medial-lateral center of the tibial tray.
- 5. The prosthesis of claim 4, wherein four mating elements secure the modular keel to the tibial tray.
- 6. The prosthesis of claim 1, wherein one mating element secures the modular keel to the tibial tray.
- 7. The prosthesis of claim 1, further comprising a rotating disc fixable at its center to the medial-lateral center of the tibial tray and also being fixable to the modular keel at a position on the disc that is offset from the center of the disc.
- 8. The prosthesis of claim 7, wherein the rotating disc is oriented to provide a preselected medial-lateral offset between the medial-lateral center of the tibial tray and the modular keel.
- 9. The prosthesis of claim 1, wherein the modular keel is adjustable to provide a medial-lateral offset between the modular keel and the media-lateral center of the tibial tray that is at least about 8 millimeters in the medial or lateral direction.
- 10. The prosthesis of claim 1, wherein the modular keel has a tray mating portion matable with the inferior surface of the tibial tray and a keel portion having a fixed offset in a medial-lateral direction with respect to the tray mating portion wherein the modular keel is selected from a group comprising a plurality of modular keels having different fixed offsets.
- 11. The prosthesis of claim 10, wherein the group comprising a plurality of modular keels having different fixed offsets includes at least a modular keel having an offset of about 4 millimeters in the medial direction.
- 12. The prosthesis of claim 10, wherein the group comprising a plurality of modular keels having different fixed offsets includes at least a modular keel having a neutral offset.
- 13. A tibial prosthesis comprising:
a tibial platform having a medial-lateral center and an inferior surface matable with a resected proximal tibia; and a modular keel fixable to the inferior surface and having a preselected offset in a medial-lateral direction with respect to the medial-lateral center of the tibial platform.
- 14. The prosthesis of claim 13, wherein the modular keel has a preselected offset of about 4 millimeters in the medial direction.
- 15. The prosthesis of claim 13, wherein the modular keel is selected from a group comprising a plurality of modular keels having different preselected offsets in a medial-lateral direction with respect to the medial-lateral center of the tibial platform.
- 16. The prosthesis of claim 13, wherein the modular keel includes a substantially flat platform mating portion having an inferior surface, and the tibial platform has a recessed region defined on its inferior surface, wherein the platform mating portion seats within the recessed region so that the inferior surface of the platform mating portion is substantial flush with the inferior surface of platform when the modular keel is fixed to the tibial platform.
- 17. The prosthesis of claim 13, further comprising a stem receivable within the central canal of a patient's tibia.
- 18. The prosthesis of claim 13, wherein the stem is modular and matable with the modular keel.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional of application Ser. No. 09/595,190, filed Jun. 16, 2000 and entitled “TIBIAL TRAY WITH ADJUSTABLE KEEL,” which is a continuation of application Ser. No. 09/076,967, filed May 13, 1998, and entitled “TIBIAL TRAY WITH ADJUSTABLE KEEL.”
Divisions (1)
|
Number |
Date |
Country |
Parent |
09595190 |
Jun 2000 |
US |
Child |
10289713 |
Nov 2002 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09076967 |
May 1998 |
US |
Child |
09595190 |
Jun 2000 |
US |