Method and apparatus for treatment of fresh fractures, delayed unions and non-unions of living bone
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United States of America Patent
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Oct 28, 1986
Grant Date -
N/A
app pub date -
Jun 14, 1984
filing date -
Jun 14, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus whereby a direct current at an average amplitude of substantially 20 microamperes is caused to flow from the inserted end of a cathode electrode at one longitudinal side of a fractured or otherwise defective osteal zone, through said zone, and to an anode having electrically conductive circumferential contact with the skin on the other longitudinal side of the zone of the defect. The cathode electrode is a pin inserted through marrow and into internal contact with the cortex at said one longitudinal side. For greatest effectiveness, the direct current comprises a steady component which exceeds the maximum amplitude of a varying component, and both components are of the same polarity.
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