US 12,213,888 B2
System, apparatus, and method for elbow arthroplasty
James L. Cook, Columbia, MO (US); Trent M. Guess, Columbia, MO (US); and Matthew J. Smith, Columbia, MO (US)
Assigned to THE CURATORS OF THE UNIVERSITY OF MISSOURI, Columbia, MO (US)
Appl. No. 16/981,330
Filed by James L. Cook, Columbia, MO (US); Trent M. Guess, Columbia, MO (US); and Matthew J. Smith, Columbia, MO (US)
PCT Filed Mar. 22, 2019, PCT No. PCT/US2019/023615
§ 371(c)(1), (2) Date Sep. 16, 2020,
PCT Pub. No. WO2019/190923, PCT Pub. Date Oct. 3, 2019.
Claims priority of provisional application 62/650,480, filed on Mar. 30, 2018.
Prior Publication US 2021/0059824 A1, Mar. 4, 2021
Int. Cl. A61F 2/38 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/3804 (2013.01) [A61F 2002/30253 (2013.01); A61F 2002/3065 (2013.01); A61F 2002/30655 (2013.01); A61F 2002/3809 (2013.01); A61F 2002/3813 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An elbow arthroplasty method comprising:
providing a convex prosthetic component comprising a ball with a surface coupled to a stem, wherein the ball is an ellipsoid or a portion of an ellipsoid, wherein the ball comprises an ellipsoidal outer surface extending continuously outward from a peripheral edge of the surface coupled to the stem;
surgically fitting and affixing the stem of the convex prosthetic component to at least one member of one of the following groups: (i) a humerus, or (ii) a radius, an ulna, or both of the radius and the ulna, in a manner in which the ball is not rotatable with respect to the at least one member of the following groups: (i) the humerus, or (ii) the radius, the ulna, or both of the radius and the ulna to which the convex prosthetic component is affixed;
coupling a socket to at least one member of the other of the following groups: (i) the humerus, or (ii) the radius, the ulna, or both of the radius and the ulna, the socket having a concave ellipsoidal surface defining a cavity and an opening through which the cavity is accessible; and
positioning at least a portion of the ball within the cavity defined by the socket, and
wherein when the ball is positioned within the cavity, the ball is rotatable with respect to the socket about a first axis allowing flexion rotation and extension rotation of the ulna relative to the humerus, a second axis allowing abduction rotation and adduction rotation of the ulna relative to the humerus, and a third axis allowing internal rotation and external rotation of the ulna relative to the humerus.