Mobile bearing knee prosthesis

Details Mobile bearing knee prosthesis Mobile bearing knee prosthesis

2004-07-19

2008-09-09

Snow, Bruce E (Department: 3738)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

C623S020320, C623S020340

Reexamination Certificate

active

07422605

ABSTRACT:
In one embodiment of the present invention a mobile bearing knee prosthesis may include an interface (e.g., a spherical radius interface) comprised of a concave superior surface on a tibial tray and a convex inferior surface on a tibial insert. In another embodiment of the present invention a mobile bearing knee prosthesis may include an interface (e.g., a spherical radius interface) comprised of a convex superior surface on a tibial tray and a concave inferior surface on a tibial insert. In another embodiment of the present invention a mobile bearing knee prosthesis may include a bi-concave interface (e.g., having a “wave” like surface geometry). This “wave” like surface geometry may be at the second bearing (i.e., at the interface between a tibial insert and a tibial tray in the mobile bearing knee as opposed to the interface between the tibial insert and a femoral component).

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International Search Report For PCT/US04/23189, Dated, Nov. 29, 2004, Listing The Following Three References: US2003/0040802 A1; US2003/0028254 A1; and US6,290,726 B1.
English language abstract of FR2839256 from the esp@cenet database.
The Effect of Contact Area on Wear in Relation to Fixed Bearing and Mobile Bearing Knee Replacements; by Shivani Sathasivam et al.; John Wiley & Sons, Inc. J Biomed Mater Res (Appl Biomatter), 2001 pp. 282-290.

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