US 12,239,540 B2
Asymmetric tibial components for a knee prosthesis
Mary S. S. Wentorf, Warsaw, IN (US); Jeffrey E. Bischoff, Warsaw, IN (US); Raymond C. Parisi, Wakarusa, IN (US); and Katherine M. Rettig, Cincinnati, OH (US)
Assigned to Zimmer, Inc., Warsaw, IN (US)
Filed by Zimmer, Inc., Warsaw, IN (US)
Filed on Dec. 8, 2021, as Appl. No. 17/545,728.
Application 17/545,728 is a continuation of application No. 16/596,194, filed on Oct. 8, 2019, granted, now 11,224,519.
Application 16/596,194 is a continuation of application No. 15/827,654, filed on Nov. 30, 2017, granted, now 10,470,889.
Application 15/827,654 is a continuation of application No. 14/034,937, filed on Sep. 24, 2013, granted, now 9,861,490.
Application 14/034,937 is a continuation of application No. 13/189,336, filed on Jul. 22, 2011, granted, now 8,613,775.
Claims priority of provisional application 61/381,800, filed on Sep. 10, 2010.
Claims priority of provisional application 61/367,375, filed on Jul. 24, 2010.
Prior Publication US 2022/0096243 A1, Mar. 31, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/38 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/389 (2013.01) [A61F 2002/30326 (2013.01); A61F 2002/30387 (2013.01); A61F 2002/30616 (2013.01); A61F 2002/30883 (2013.01); A61F 2/3868 (2013.01); A61F 2/3886 (2013.01); A61F 2220/0025 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A tibial baseplate comprising:
a distal surface comprising a bone-contacting surface;
a proximal surface comprising a tibial bearing engagement surface generally opposite the distal surface, the proximal surface having a lateral compartment and a medial compartment;
a peripheral wall extending between the distal surface and the proximal surface and defining a periphery of the tibial baseplate;
an anteroposterior axis dividing the proximal surface and the periphery into the medial compartment and the lateral compartment; and
a centroid defined by the periphery of the tibial baseplate, the centroid medially biased with respect to the anteroposterior axis;
wherein a posterior-medial distance (DMP) extends from the centroid toward a posterior-medial corner arc of the periphery at an angle of 130 counter-clockwise degrees from the anteroposterior axis, and a posterior-lateral distance (DLP) extends from the centroid toward a posterior-lateral corner arc of the periphery at an angle of 120 clockwise degrees from the anteroposterior axis;
wherein the DMP is larger than the DLP for a given size of the tibial baseplate.