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US 2004/0002769 A1Published application
Arthroplasty and fixation devices with threaded intramedullary component
OwnerBret A. Ferreeinventor
Life of this patent
Estimating the term…
Abstract
Arthroplasty devices having improved bone in growth to provide a more secure connection within the body. Different embodiments disclosed include devices having threaded intramedullary components, devices configured to receive bone growth promoting substances, devices with resorbable components, and devices configured to reduce shear stress.
Claims19
A prosthesis for surgical implantation into a bone, comprising:
- a first fixation element consisting of a hollow tubular element having a first section with a smooth outer surface and a second section having an upper surface and a threaded outer surface, capable of threadedly engaging the interior surface of a bone;
- a sleeve having an outer surface and an opening through said sleeve sized to accommodate said outer surface of said first section of said tubular element;
- and a rod element having an elongated shank and terminating in an angular stem, said elongated shank sized to fit within said hollow tubular element of said first component such that rotation between said rod element and said first fixation element is prevented.
A prosthesis for surgical implantation into a bone, comprising:
- an fixation element having an elongated first section, including a first aperture with a threaded inner surface and a second section having a threaded outer surface capable of threadedly engaging the interior surface of a bone;
- a sleeve having an upper surface, terminating in an angular stem, a recess in said upper surface containing a second aperture aligned with said first aperture of said fixation element, and a lower surface, having an opening within said sleeve sized to accommodate said first section of said fixation element;
- and a threaded fastener, capable of passing through said second aperture in said recess of said sleeve to threadedly engage said first aperture in said element.
A prosthesis for surgical implementation within a bone to repair a fracture comprising:
- a fixation disc having a threaded outer surface capable of threadedly engaging the interior surface of a bone, and also having an opening through said disc containing a threaded interior surface;
- and an elongated rod having a first enlarged section, located toward one end of said rod, having a threaded outer surface capable of threadedly engaging the interior surface of a bone, and a second section toward the other end of said rod having a threaded outer surface capable of threadedly engaging said threaded interior surface of said fixation disc;
- such that when said first enlarged section of said elongated rod threadedly engages the bone on one side of the fracture, said fixation disc may be threaded onto said second section of said rod while threadedly engaging the bone on the opposite side of the fracture to pull the bone together at the fracture site.
Dependencies are inferred from the claim text.