The present disclosure relates to a customized medical implant for attachment to and at least partly covering the natural femoral head of a hip joint of a subject. The medical implant comprises a dome shaped shell having a height (h), an inner equatorial shell radius (rs), an orifice radius (ro), a thickness (ts) at the equatorial line, and a thickness (tt) at the top of the dome. The implant is constructed such that one or more of the thickness (ts), the thickness (tt), the equatorial shell radius (rs), the orifice radius (ro) and the shell height (h) are customized to the hip joint of the subject based on at least one 3D computed tomography image showing substantially the entirety of the natural femoral head and the acetabulum of said hip joint.
