Distraction apparatus
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United States of America Patent
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Mar 20, 2001
Grant Date -
N/A
app pub date -
Jan 7, 2000
filing date -
Jul 7, 1997
priority date (Note) -
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Abstract
The invention relates to a distraction apparatus for holding a fracture during the healing process. The apparatus includes screws or pins for insertion into a bone at points proximal and distal relative to a fracture site, and a pair of springs which can be connected externally between the screws or pins at spaced positions thereon. The springs act as an extension spring and a compression spring respectively between the screws or pins. The invention is characterized in that the springs are connected at the spaced positions at such distances relative to the bone that the springs will exert moments of force in order to obtain a desired torque load at the fracture site.
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