US 7,572,292 B2
Hinged joint system
Paul Crabtree, Nesbit, Miss. (US); Greg Marik, Germantown, Tenn. (US); Abraham Salehi, Bartlett, Tenn. (US); Kevin Weaver, Bartlett, Tenn. (US); Frantz Langlais, Rennes (France); Denis Huten, Vincennes (France); and Dennis Harrison, Nesbit, Miss. (US)
Assigned to Smith & Nephew, Inc., Memphis, Tenn. (US)
Appl. No. 10/499,047
PCT Filed Dec. 20, 2002, PCT No. PCT/US02/41221
§ 371(c)(1), (2), (4) Date Jun. 16, 2004,
PCT Pub. No. WO03/059203, PCT Pub. Date Jul. 24, 2003.
Claims priority of provisional application 60/342350, filed on Dec. 21, 2001.
Prior Publication US 2005/0107886 A1, May 19, 2005
Int. Cl. A61F 2/38 (2006.01)
U.S. Cl. 623—20.24 5 Claims
OG exemplary drawing
 
1. A prosthetic system for performing the function of a knee joint, comprising:
(a) a tibial component having a tibial plateau and a tibial stem portion, the tibial plateau having a top side and a bottom side;
(b) a post having a proximal end and a distal end, the post fixedly projecting from the top side of the tibial plateau;
(c) a tibial insert having an aperture, the tibial insert adapted to be positioned on the top side of the tibial plateau with the tibial insert aperture adapted to receive the post;
(d) a femoral component having a base portion and a central housing having a femoral stem portion, the base portion having a pair of condyles and two posteriorly extending lobes;
(e) an axle adapted to connect to the lobes and extend between the lobes;
(f) a link having an anterior end and a posterior end, the link adapted to be connected to the axle at the posterior link end and, the link slidably receiving the post at the anterior end such that the link translates along a superior-inferior axis of the post and rotates about the post during flexion of the prosthetic system; and
(g) an anterior aperture in the link and a cap adapted to mount on the post, the cap having a lip portion that extends beyond the diameter of the proximal end of the post, the anterior link aperture having a smaller diameter at its distal end, whereby the lip portion engages the smaller diameter of the anterior link aperture and prevents distraction of the prosthetic system.