Patent ID: 8715365

Claim:
A hip hemiarthroplasty device for complete replacement of a femoral head in a subject or replacement of an articular surface of the femoral head of the subject, comprising: a femoral component having a distal end and a proximal end, the distal end inserted and anchored in a reamed femoral canal in the subject, said femoral component expandable to fill the spatial confines of said reamed femoral canal; a femoral head component with a smooth surface attached to the proximal end of the femoral component, the femoral head component containing a deflated balloon; and the hip hemiarthroplasty device having a deflated position and an inflated position, wherein the deflated position occurs when the hip hemiarthroplasty device is collapsed into a compact position suitable for insertion into the reamed femoral canal, and the inflated position occurs when the deflated balloon has been inflated with a molding within the subject to expand within a reamed femoral neck and to form an inflated balloon that resembles the femoral head of the subject, such that the inflated balloon can completely replace the femoral head of the subject.