Patent ID: 8764838

Claim:
A tibial bearing component for articulation with medial and lateral femoral condyles, the tibial bearing component defining a tibial bearing component coordinate system comprising: a bearing component transverse plane extending along a medial/lateral direction and an anterior/posterior direction; a bearing component coronal plane extending along a proximal/distal direction and the medial/lateral direction, said bearing component coronal plane perpendicular to the bearing component transverse plane; and a bearing component sagittal plane extending along the anterior/posterior direction and the proximal/distal direction, said bearing component sagittal plane perpendicular to the bearing component transverse plane and said bearing component coronal plane, said tibial bearing component comprising: an articular surface and an opposing distal surface, said distal surface parallel to the bearing component transverse plane, said articular surface including medial and lateral dished articular compartments sized and shaped for articulation with the medial and lateral femoral condyles respectively, said medial and lateral dished articular compartments separated from one another by the bearing component sagittal plane, said articular and distal surfaces bounded by a tibial bearing periphery, said medial and lateral dished articular compartments having medial and lateral distal-most points defined as the points in said medial and lateral dished articular compartments, respectively, that are closest to said distal surface, and a posterior eminence extending proximally from said articular surface to define an eminence height of between 3.8 mm and 10 mm as measured from said distal-most points along the proximal/distal direction, said posterior eminence disposed between said medial and lateral dished articular compartments and extending anteriorly from a posterior edge of said tibial bearing periphery to define an anterior/posterior eminence extent equal to less than 30% of an overall anterior/posterior extent of said tibial bearing component, said posterior eminence comprising an eminence articular surface having a rounded shape and a sidewall defining an eminence periphery in a plane parallel to said bearing component transverse plane, said sidewall comprising an arcuate anterior sidewall, an arcuate lateral sidewall, and an arcuate medial sidewall.