Intervertebral spacer device having a spiral wave washer force restoring element
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United States of America Patent
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Mar 4, 2003
Grant Date -
Jan 16, 2003
app pub date -
Jul 16, 2001
filing date -
Jul 16, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An intervertebral spacer device having a pair of opposing plates for seating against opposing vertebral bone surfaces, separated by at least one force restoring element. The preferred force restoring mechanism is a spiral-shaped radially diminishing amplitude wave washer.
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