Load sharing interbody fusion device
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United States of America Patent
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Jul 3, 2012
Grant Date -
Jun 18, 2009
app pub date -
Dec 8, 2008
filing date -
Dec 12, 2007
priority date (Note) -
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Abstract
The present invention is a load sharing intervertebral fusion device that allows for reconstruction of the proper disc space between two vertebral bodies while allowing bone material packed within the fusion device to share loading and stress for enhanced healing. The device includes two sections, an upper and lower section, separated by a bioresorbable spacer. The upper section slides relative to the lower section with the bioresorbable material being placed in load therebetween. The upper section and lower sections are effectively held apart, creating an initial fixed spacer for implantation of the intervertebral disc space. Openings in the implant construct allow for bone graft and bone substitutes to be placed within the implant to allow for fusion through the implant construct. After implantation and over a period of time based on bone resorbtion and remodeling, the spacer resorbs, thereby maintaining load on the bone graft material.
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