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US 9,295,556 B2Granted
Minimally invasive total hip replacement
AssigneeArthrex, Inc.
InventorsArley Perez, III, Christopher G. Papangelou, Gregory Joshua Karnes, Antonio Pozzi, Brandon L. Roller
Life of this patent
Estimating the term…
Abstract
A femoral implant for total hip replacement includes a cage screw, a femoral head and a base plate provided between the cage screw and the femoral head, to minimize the stress transferred from the femoral head to the bone. The femoral implant may optionally include devices for lateral fixation (for example, internal and/or external screws for lateral fixation) and a device for minimizing micro-motion that is integral to, and extends from, the cage screw.
Claims3
A method of hip replacement, comprising the steps of:
- resecting a portion of a femoral head at a defect location;
- preparing a socket or tunnel in the defect location;
- placing a base plate of an implant over the defect location and over the socket or tunnel so that the base plate is flush with a femoral contour, the base plate including a central opening;
- subsequently, inserting a cannulated, threaded screw through the central opening and then into the socket or tunnel until a proximal end of the cannulated screw is seated flush on top of the base plate, the screw having a distal end with an internal thread;
- advancing a fixation device having a proximal end and a distal end into femoral cortex by inserting the fixation device through the cannulated, threaded screw, so that the cannulated, threaded screw receives and engages the fixation device at the internal thread, and the distal end of the cannulated, threaded screw is aligned with the proximal end of the fixation device;
- and
- placing a spherical head over the base plate so that the spherical head rests on the base plate.
4 more elements
Dependencies are inferred from the claim text.