Retaining mechanism for a modular tibial component of a knee prosthesis
First Claim
1. A tibial prosthetic knee component comprising:
- a tibial tray for replacing a portion of a patient'"'"'s tibia, said tibial tray including a dovetailed posterior rail and an anterior rail, said tibial tray further including a clip tab cutout in said anterior rail and a support shelf;
a tibial insert having a posterior dovetail matching said posterior rail in said tibial tray, and an anterior surface matching said anterior rail in said tibial tray, said tibial insert including a cutout in said anterior surface; and
a clip for locking said tibial insert to said tibial tray, said clip including a holding member and a tab spaced from the holding member, said clip retaining said tibial insert in said tibial tray when said tab is inserted through said clip tab cutout and into said cutout in said insert, and said holding member is engaged with said tray, wherein the tray includes an opening disposed beneath said clip tab cutout, and the holding member is received in said opening.
4 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a tibial prosthetic knee component. The prosthesis includes a tibial tray having a posterior rail and an anterior rail, and a tibial insert. The tibial insert has a posterior dovetailed surface matching the posterior rail in the tibial tray, and an anterior surface matching the anterior rail in the tibial tray. The posterior rail of the tibial tray and the posterior dovetailed surface of the tibial insert are curved to provide clearance for the posterior cruciate ligament. A retaining clip is provided for retaining the tibial insert in the tibial tray. The clip includes a tab which extends through the tray into the insert and a resilient holding member remains unloaded when loads are applied to the knee, reducing the likelihood of dissociation of the tray and insert.
282 Citations
5 Claims
-
1. A tibial prosthetic knee component comprising:
-
a tibial tray for replacing a portion of a patient'"'"'s tibia, said tibial tray including a dovetailed posterior rail and an anterior rail, said tibial tray further including a clip tab cutout in said anterior rail and a support shelf; a tibial insert having a posterior dovetail matching said posterior rail in said tibial tray, and an anterior surface matching said anterior rail in said tibial tray, said tibial insert including a cutout in said anterior surface; and a clip for locking said tibial insert to said tibial tray, said clip including a holding member and a tab spaced from the holding member, said clip retaining said tibial insert in said tibial tray when said tab is inserted through said clip tab cutout and into said cutout in said insert, and said holding member is engaged with said tray, wherein the tray includes an opening disposed beneath said clip tab cutout, and the holding member is received in said opening. - View Dependent Claims (2, 3, 4)
-
-
5. A tibial prosthetic knee component comprising:
-
a tibial tray for replacing a portion of a patient'"'"'s tibia, said tibial tray including a dovetailed posterior rail and an anterior rail, said tibial tray further including a clip tab cutout in said anterior rail and a support shelf; a tibial insert having a posterior dovetail matching said posterior rail in said tibial tray, and an anterior surface matching said anterior rail in said tibial tray, said tibial insert including a cutout in said anterior surface; and a clip for locking said tibial insert to said tibial tray, said clip including a holding member and a tab spaced from the holding member, said clip retaining said tibial insert in said tibial tray when said tab is inserted through said clip tab cutout and into said cutout in said insert, and said holding member is engaged with said tray, wherein the holding member comprises a pair of spaced apart tines.
-
Specification