Methods and apparatuses for vertebral body distraction and fusion employing a coaxial screw gear sleeve mechanism
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United States of America Patent
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Nov 6, 2012
Issued Date -
N/A
app pub date -
Jul 22, 2010
filing date -
Jul 22, 2009
priority date (Note) -
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Abstract
Improved methods and apparatuses for vertebral body distraction and fusion in accordance with various embodiments of the present invention employ one or more coaxial screw gear sleeve mechanisms. In various embodiments, coaxial screw gear sleeve mechanisms include a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing the device to distract.
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