Reference mark adjustment mechanism for a femoral caliper and method of using the same
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United States of America Patent
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Oct 25, 2011
Grant Date -
Sep 22, 2005
app pub date -
Mar 5, 2004
filing date -
Mar 5, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A femoral caliper having one or more anatomical referencing members for placement against portions of the femur, such as the anterior cortex and posterior portion of the femoral condyles, to measure the femur for sizing of the femoral component. A reference mark positioning guide of the femoral caliper is connected to the anatomical referencing member and is capable of guiding placement of a reference mark on the femur that facilitates positioning of the femoral component. The femoral caliper includes an adjustment mechanism capable of displacing the reference mark positioning guide relative to the anatomical referencing member. This allows adjustment of the position of the reference mark (and hence the femoral component) on the femur to account for the up or down sizing of the femoral component. Preferably, the adjustment mechanism adjusts the reference mark positioning guide in the anterior-posterior direction to allow balancing of the tightness or laxity of the selected component.
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