Interior insert ball and dual socket joint
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United States of America Patent
Stats
-
Feb 17, 2009
Grant Date -
Aug 24, 2006
app pub date -
Aug 18, 2005
filing date -
Feb 23, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spinal implant is inserted between adjacent vertebrae to function as an disk prosthesis. The prosthesis has two plates fastened to adjacent vertebrae facing each other. The facing sides of the plates each have a depending skirt formed as concentric arcs of about 90 degrees. The skirts are either bowed or tapered in the axial direction. Depressions are centrally located between the arcs of the plates and a ball is universally movable in the depressions. A spring mechanism is centrally located in the plates to provide axial compression. One plate has a through bore and one plate has a receptacle, each, receiving a sleeve with a depression for holding the ball.
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