Patent ID: 8568486
Filing Date: 2013-10-29
Classification: A61F

Abstract:
1. A family of tibial prostheses sized for attachment to a proximal tibia, the family comprising: a plurality of tibial baseplates defining a plurality of prosthesis peripheries, each said prosthesis periphery defining: said plurality of prosthesis peripheries including: said second posterior-medial growth larger than said first posterior-medial growth, and said second posterior-lateral growth larger than said first posterior-lateral growth, whereby said plurality of tibial baseplates exhibit non-linear, asymmetric growth in medial and lateral posterior corners of said prosthesis peripheries as sizes of said tibial baseplates consecutively increase, and said medial compartment of each said prosthesis periphery is asymmetric with respect to said lateral compartment of each said prosthesis periphery about said anteroposterior axis, whereby each said prosthesis periphery is sized and shaped to cover between about 60% and about 90% of a resected proximal surface of a correspondingly sized tibia, and said lateral compartment of each said prosthesis periphery comprising a lateral periphery extending from said anterior edge to said lateral posterior edge, said lateral periphery defining a plurality of adjacent lateral arcs, a pair of said plurality of adjacent lateral arcs defining a first lateral radius and a second lateral radius, respectively, said first lateral radius larger than said second lateral radius by at least 100%, whereby said lateral periphery is relatively boxy, and said medial compartment of each said prosthesis periphery comprising a medial periphery extending from said anterior edge to said medial posterior edge, said medial periphery defining a plurality of adjacent medial arcs, a pair of said plurality of adjacent medial arcs defining a first medial radius and a second medial radius, respectively, said first medial radius larger than said second medial radius by less than 75%, whereby said medial periphery is generally rounded, and said plurality of adjacent lateral arcs greater in number as compared to said plurality of adjacent medial arcs; and a plurality of tibial bearing components, each of said plurality of tibial bearing components comprising: