Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1988-05-13
1990-06-26
Isabella, David J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
606 66, A61F 232, A61F 230
Patent
active
049368630
ABSTRACT:
An improved prosthetic device is provided particularly such as a hip prosthesis for surgical implantation into a patient. The hip prosthesis comprises an improved femoral component having an upwardly and laterally open slot formed in an upper region thereof to permit compression of the femoral component to a reduced size configuration for easier installation into a resected patient femur. An improved installation tool cooperates with the femoral component for compressing and holding the femoral component in the reduced size configuration during installation, and then for releasing the femoral component for expansion to a tight fit within the patient bone. An antirotation fin is insertable into the slot of the implanted femoral component to maintain the femoral component in the expanded state. A portion of the antirotation fin may bridge into adjacent patient bone for improved prosthesis fixation against rotation. An improved acetabular component is also provided in a size for relatively easy implantation into the acetabulum, followed by insertion of a slightly oversize acetabular bearing member which expands the acetabular component sufficiently for tight fit within the acetabulum.
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