Line of dual mobility joint implant systems

A set of components for creating joint implant systems, the set of components including balls having a plurality of different diameters, a plurality of mobile inserts each corresponding to one of the balls, and a plurality of cups, each joint implant system comprising:

• a ball, a mobile insert corresponding to a respective diameter of the ball, and one or more cups of the plurality of cups, the one or more plurality of cups configured to be mated with the ball and mobile insert;
• wherein:
• the one or more cups is configured to be affixed in an element of a considered joint, and defines a first smooth inner cavity of substantially hemispherical shape, said first smooth inner cavity having a first inner diameter;
• the mobile insert is disposed within the first smooth inner cavity of the cup and has a smooth outer surface configured to cooperate by a first ball-and-socket joint with the first smooth inner cavity of the cup, and defines a second smooth inner cavity of substantially hemispherical shape, said second smooth inner cavity having a second inner diameter;
• the ball is of spherical shape having the respective diameter of the plurality of different diameters, said ball being solid with a second element of the considered joint, and being configured to be received in the second smooth inner cavity and to form a second ball-and-socket joint,
• wherein a ratio of the first inner diameter of the first smooth inner cavity to the second inner diameter of the second smooth inner cavity for all of the joint implant systems achievable from the set of components, is constant, regardless of the respective diameter of the ball.