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US 12,569,347 B2Granted
Metal-reinforced polymer femoral component of an orthopaedic knee prosthesis and associated method of making the same
AssigneeDepuy Ireland Unlimited Company
InventorsThomas E. Wogoman, Travis D. Bennett, Dustin N. Albert, Rajendra K. Kasinath, Bryan J. Smith, David A.B. Smith, Daniel J. Denney
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Abstract
An orthopaedic knee prosthesis includes a femoral component having a metal base with a polymer articular layer molded thereto. A method for making a metal-reinforced femoral component of an orthopaedic knee prosthesis is also disclosed.
Claims20
An orthopaedic knee prosthesis, comprising:
- a femoral component, comprising:
- a metal base comprising (i) an inferior base surface that is curved in the sagittal plane, the inferior base surface having a plurality of elongated ribs extending inferiorly therefrom, and (ii) a superior base surface having a porous-metal coating disposed thereon, the superior base surface comprising (a) a posterior fixation surface that extends generally in the superior/inferior direction, (b) a distal fixation surface that extends generally in the anterior/posterior direction, (c) a posterior-chamfer fixation surface that extends superiorly and posteriorly from the distal fixation surface in the direction toward the posterior fixation surface, (d) an anterior fixation surface that extends generally in the superior/inferior direction, and (e) an anterior-chamfer fixation surface that extends superiorly and anteriorly from the distal fixation surface in the direction toward the anterior fixation surface, and
- a polymer articular layer molded to the inferior base surface of the metal base and into a plurality of elongated grooves defined by the plurality of ribs, the polymer articular layer having an articulation surface that is curved in the sagittal plane and configured to articulate with a bearing surface of a tibial component.
An orthopaedic knee prosthesis system, comprising:
- a tibial component configured to be implanted on a proximal end of a patient's tibia, the tibial component including a concave bearing surface, and
- a femoral component configured to be implanted on a distal end of a patient's femur, the femoral component comprising:
- a metal base comprising (i) an inferior base surface that is curved in the sagittal plane, the inferior base surface having a plurality of elongated ribs extending inferiorly therefrom, and (ii) a superior base surface having (a) a number of bone fixation surfaces, and (b) a number of lugs extending superiorly from one of the number of bone fixation surfaces,
- a porous-metal coating disposed on the superior base surface of the metal base and the lugs, and
- a polymer articular layer molded to the inferior base surface of the metal base and into a plurality of elongated grooves defined by the plurality of ribs, the polymer articular layer having an articulation surface that is curved in the sagittal plane and configured to articulate with the bearing surface of the tibial component.
2 more elements
Dependencies are inferred from the claim text.