Surgery – Truss – Perineal
Patent
1984-11-19
1987-08-18
Rosenbaum, C. Fred
Surgery
Truss
Perineal
128 92YD, A61F 504
Patent
active
046869719
ABSTRACT:
A method and apparatus for extracting a prosthesis, particularly a femoral component of a hip prosthesis, which is embedded in a skeletal bone. The apparatus of this invention includes a hollow housing having a lower bearing surface which bears against the proximal end of the bone surrounding the prosthesis to be extracted, a threaded shaft having one end extending into the housing, means mounted externally of the housing which can be rotated to axially advance the shaft and means disposed on the one end of the shaft disposed within the housing for grasping the prosthesis for extraction thereof. A bearing plate may be provided between the proximal end of the skeletal bone and the bearing surface of the housing to evenly distribute the reaction forces applied by the housing over the exposed surface of the proximal end of the bone, and for a cemented prosthesis, over the exposed bone and cement surfaces. This bearing plate may be provided with any desired angle of slope with respect to the proximal end of the bone. Rotation of the threaded shaft causes a controlled, continuous extraction force to be applied to the component to smoothly and slowly break the bonds between the component and the bone or between the component and cement.
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Burke Dennis W.
Harris William H.
Rosenbaum C. Fred
Shedd C. W.
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