Patent ID: 8380319

Claim:
An osteogenesis device for providing electrical stimulation in bone comprising: a screw member having proximal and distal ends, said screw member being constructed of an electrically non-conductive material with an external threaded portion, said screw threaded portion being constructed essentially entirely from a group of materials consisting of ceramic, non-conductive plastic consisting of PEEK (Poly-ether-ketone), PSU (polysulphone), PEKK (Polyether-ketone-ketone) or polyether-co-ketone, said screw member defining an axial through going lumen, a hermetically sealed battery casing removably mounted on a proximal end of said screw member, a battery mounted in said battery casing and circuit means connecting said battery to a lead wire, said lead wire being mounted in said lumen and extending through said lumen beyond a distal tip of said screw member acting as a cathode.