Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1990-02-02
1991-05-28
Isabella, David J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
A61F 232
Patent
active
050191080
ABSTRACT:
A modular hip implant for left or right side installation as a femoral implant portion of a hip prosthesis. The implant is preferably utilized in a surgical procedure addressing fractures of the femoral neck and may inclue a lateral opening formed through a proximal portion of the implant for receiving a fenestration plug for installation thereover. Which fenestration plug is for use where the implant is to be cemented in place, and is not installed when the implant is for friction seating implantation. For ease of installation, the implant includes a stem that tapers inwardly along three sides, the anterior, medial and posterior, to the implant end, the corners or junctions of which sides are rounded. The implant is also tapered at the proximal portion, inwardly from its lateral straight side to its medial side, for providing, when press fitted into a prepared medullary channel, a wedging therein. The proximal portion of which implant may be roughened to encourage cancellous tissue growth thereto, and includes a lateral hole therethrough that is to receive a tool for turning and lifting the implant for its removal. Adjacent to which hole is arranged a collar that is tapered inwardly from a wide circular circumference to above the opposite surfaces of the implant proximal portion, which taper allows for passage of a tool along the implant that is used for cutting through bone growth or cement to facilitate implant removal. A tapered neck extends at approximately a right angle from the surface of which collar that is for mounting a head thereon. Which neck is offset medially to where a selected head mounted on the neck will match the normal anatomy of a particular patient.
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Bertin Kim C.
Rubash Harry E.
Isabella David J.
Russell M. Reid
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