Method and apparatus for determining the neutral axis of a foot or the like
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United States of America Patent
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-
Nov 22, 1983
Grant Date -
N/A
app pub date -
Aug 19, 1981
filing date -
Aug 19, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for determining the neutral axis of a foot or the like, as well as an apparatus therefore. The neutral axis can be conveniently defined as the orientation of the subtalar joint wherein its relationship to adjacent bones is such that there is no movement in that area. Consequently no loading is transferred to adjacent areas. The method includes placing a level indicator on the sinus tarsi portion of the foot and rotating the foot relative to the vertical axis defined by the leg until the indicator on the level is centered, indicative of the neutral position. The level structure includes a hinged wing attached at one extremity to the indicator and a tether so that in the preferred form the level indicator is disposed in substantially a horizontal plane. Disposition of the indicator on the patella is also contemplated as being a part of this invention for orienting the foot when it is covered by a boot or the like.
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