US 12,376,964 B2
Apparatus and method for locking an acetabular liner to an acetabular cup
Ryan C. Keefer, Warsaw, IN (US); and Alena M. Brandewie, Warsaw, IN (US)
Assigned to DePuy Ireland Unlimited Company, Ringaskiddy (IE)
Filed by DEPUY IRELAND UNLIMITED COMPANY, Ringaskiddy (IE)
Filed on Apr. 30, 2021, as Appl. No. 17/246,088.
Prior Publication US 2022/0346959 A1, Nov. 3, 2022
Int. Cl. A61F 2/34 (2006.01)
CPC A61F 2/34 (2013.01) [A61F 2002/3429 (2013.01); A61F 2002/3483 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An orthopaedic implant, comprising:
an acetabular bearing having (i) a convex outer surface extending medially from a rim to an apex and (ii) a concave inner surface positioned opposite the outer surface;
wherein when viewed in a cross sectional view taken in an anterior-posterior direction, the convex outer surface has a hemispherical surface encompassing the apex and, on each side of the hemispherical surface: (i) a curved lead-in surface, defined by a radius of curvature, connected to the hemispherical surface at a first tangent point and extending laterally away from the hemispherical surface, (ii) a flat flange surface connected to the curved lead-in surface at a second tangent point and extending laterally away from the curved lead-in surface, (iii) a curved relief surface extending laterally away from the flat flange surface, and (iv) a flat tapered surface extending laterally from the curved relief surface to the rim; and
wherein (i) a first imaginary line extends along the flat tapered surface and (ii) the curved relief surface is positioned between the concave inner surface and the first imaginary line.