Patent ID: 8092544

Claim:
An orthopaedic implant, comprising: a patella component having (i) a posterior bearing surface configured to articulate with the femoral condyles of a femur, and (ii) an anterior surface having a number of pegs extending outwardly therefrom, wherein, when viewed in a cross sectional view taken in the superior/inferior direction, the posterior bearing surface has (i) a curved peak surface that defines the posterior-most surface of the patella component, (ii) a flat superior surface that extends superiorly away from the curved peak surface, (iii) a rounded superior edge surface that extends superiorly away from the flat superior surface in the direction toward the anterior surface of the patella component, (iv) a flat inferior surface that extends inferiorly away from the curved peak surface, and (v) a rounded inferior edge surface that extends inferiorly away from the flat inferior surface in the direction toward the anterior surface of the patella component, wherein, when viewed in a cross sectional view taken in the medial/lateral direction, the posterior bearing surface has (i) a flat medial surface that extends medially away from the curved peak surface, and (ii) a rounded medial edge surface that extends inferiorly away from the flat medial surface in the direction toward the anterior surface of the patella component, wherein (i) a first imaginary line extends along the flat superior surface and defines a first tangent point at the transition of the flat superior surface and the rounded superior edge surface, (ii) a second imaginary line extends along the flat inferior surface and defines a second tangent point at the transition of the flat inferior surface and the rounded inferior edge surface, (iii) a third imaginary line extends along the flat medial surface and defines a third tangent point at the transition of the flat medial surface and the rounded medial edge surface, (iv) a first imaginary line segment extends orthogonally from the anterior surface of the patella component to the first tangent point, (v) a second imaginary line segment extends orthogonally from the anterior surface of the patella component to the second tangent point, (vi) a third imaginary line segment extends orthogonally from the anterior surface of the patella component to the third tangent point, (vii) the first imaginary line segment is longer than the second imaginary line segment, (viii) the second imaginary line segment is longer than the third imaginary line segment, (ix) a point on the curved peak surface defines the posterior-most point of the patella component, (x) a fourth imaginary line extends orthogonally from the anterior surface of the patella component through the posterior-most point of the patella component, (xi) a fifth imaginary line extends orthogonally from the anterior surface of the patella component through the midpoint of the superior/inferior width of the anterior surface of the patella component, and (xii) the fourth imaginary line is parallel to, and spaced apart from, the fifth imaginary line.