Patent ID: 8512416

Claim:
A transdermal intraosseous device comprising: a transdermal adapter configured for connection to an external prosthetic device and configured for use with a bone, the transdermal adapter including: a metal dome-shaped portion configured for transcutaneous implantation; a polished metal external shaft having a longitudinal axis and extending from the metal dome-shaped portion; and a dermal transition structure defining a controlled roughness gradient from the dome-shaped portion of the transdermal adapter to the polished metal external shaft and configured for engagement with a dermis layer of a patient for infection control, the dermal transition structure including: a porous metal dome-shaped structure surrounding and overlaying the dome-shaped portion of the transdermal adapter; a first transitional surface treatment layer and a second transitional surface treatment layer both between a sidewall of the polished external shaft and the porous metal dome-shaped structure, the first and second layers aligned along the longitudinal axis of the polished metal external shaft; the first transitional surface treatment layer roughened by blasting and configured for direct engagement with the dermis layer upon implantation of the device; and the second transitional surface treatment layer roughened by a combination of blasting treatment and acid-etching treatment and configured for direct engagement with the dermis layer upon implantation of the device; and a bone fixator including a tapered distal portion received into a tapered bore of the dome-shaped portion of the transdermal adapter via a taper-to-taper connection, a proximal portion configured for anchoring into the bone and a skirt-shaped collar between the distal portion and the proximal portion; wherein the first transitional surface treatment layer is contiguous with the porous metal dome-shaped structure and is between the porous metal dome-shaped structure and the second transitional surface treatment layer, which abuts the sidewall of the polished metal external shaft; and wherein the first and the second transitional surface treatment layers provide a gradual transition from the polished metal external shaft to a rough surface of the porous metal dome-shaped structure through the first and the second transitional surface treatment layers, the first transitional surface treatment layer has a greater roughness than the second transitional surface treatment layer.