Prosthesis and methods including anatomically positioned holes

A method of anatomically positioning screw holes in an acetabular implant, the method comprising:

• determining, based on anatomic information for a living being, a size of an acetabular shell having a hemispherical shaped dome;
• obtaining anatomic data including data defining an arch of bone behind an acetabulum of the living being, the arch of bone extending from a superior anterior portion to an inferior posterior portion of the acetabulum;
• and
• positioning a first series of holes along a first arched line within the acetabular shell, the first arched line determined based on the anatomic data for the arch of bone behind the acetabulum for the living being,
• wherein the first arched line is positioned to follow the arch of bone behind the acetabulum for the living being,
• wherein a line extends along the first arched line to identify the first series of holes.