Patent ID: 7648530

Claim:
A shaftless shoulder joint prosthesis, comprising an at least two-piece humeral head prosthesis, composed of a joint head mountable solely on the prosthesis by a tap-on fit, and an attachment body of an at least two-part design including an attachment part for the mounting attachment of the calotte, as well as a mounting segment to effect an at least cement-free anchoring of the attachment body within the bone, wherein the attachment part is a disk-like positioning body having a medial hole about an axis of the body with a relatively large diameter annular-shaped section about the medial hole and axis, a first side of the annular-shaped section having fixation hooks or projections thereon to provide a provisional positionally-correct fixation to a pretreated bone, and a second side of the annular-shaped section opposite said first side having a relatively smaller diameter at least nearly circular, upstanding projecting collar about the medial hole and axis, the collar projecting outwardly from the second side of the annular-shaped section with an inner surface configured to position the mounting segment when effecting said anchoring and an external surface configured for engagement with and attachment of the joint head thereon solely by means of a tap on the joint head, and as said mounting segment an anchoring body having a hollow screw provided in order to affix the positioning body to the bone through the medial hole in the projecting collar and the annular-shaped section.