Patent ID: 9144499
Filing Date: 2015-09-29
Classification: A61B,A61F

Abstract:
1. A knee prosthesis system comprising: a femoral component having medial and lateral condyles with curved articulating surfaces; a tibial component comprising a first frame having an anterior portion, a posterior portion, a medial portion extending between the anterior portion and the posterior portion, a lateral portion extending between the anterior portion and the posterior portion, a central portion extending between the anterior portion and the posterior portion, a stem extending distally from the central portion, the stem having a central longitudinal axis and an outer surface tapering distally toward the central longitudinal axis; the anterior portion, posterior portion, medial portion, lateral portion and central portion defining spaced first medial and first lateral openings, the first medial opening extending from the medial portion of the first frame to the central portion of the first frame and the first lateral opening extending from the lateral portion of the first frame to the central portion of the first frame, the anterior portion, posterior portion, medial portion and central portion having side walls facing the medial opening; the anterior portion, posterior portion, lateral portion and central portion having side walls facing the lateral opening; a first medial bearing component including a proximal bearing surface, a distal surface, a peg extending distally from the distal surface and side walls extending between the proximal bearing surface and distal surface, the proximal bearing surface being sized and shaped to articulate with the curved articulating surface of the medial condyle of the femoral component; a first lateral bearing component including a proximal bearing surface, a distal surface, a peg extending distally from the distal surface and side walls extending between the proximal bearing surface and distal surface, the proximal bearing surface being sized and shaped to articulate with the curved articulating surface of the lateral condyle of the femoral component; the first medial bearing component being sized and shaped to fit within the first medial opening in the first frame with the side walls of the first medial bearing component juxtaposed with the side walls of the first frame facing the first medial opening; the first lateral bearing component being sized and shaped to fit within the first lateral opening in the first frame with the side walls of the first lateral bearing component juxtaposed with the side walls of the first frame facing the first lateral opening; and the side walls of the first medial bearing component, first lateral bearing component and first frame having complementary locking members to selectively lock the first medial bearing component in the first medial opening and the first lateral bearing component in the first lateral opening; wherein the first frame and first medial bearing component and first lateral bearing component can be assembled with the first medial bearing component received within the first medial opening so that the side walls of the first medial bearing component and side walls of the first frame surrounding the medial opening lock together to selectively fix the first medial bearing component to the first frame and so that the side walls of the first lateral bearing component and side walls of the first frame surrounding the first lateral opening lock together to selectively fix the first lateral bearing component to the first frame.