Endodontic instruments having improved physical properties
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United States of America Patent
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Aug 13, 2002
Issued Date -
N/A
app pub date -
Oct 2, 1997
filing date -
May 30, 1995
priority date (Note) -
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Abstract
Endodontic instruments, including files, reamers, and broaches, wherein the working shaft portion has flexibility/stiffness properties and hardness properties that may vary along its length. These variations in physical properties can be accomplished by utilization of specific materials having a prescribed amorphous phase content, by application of specific coatings or surface treatments, or by selective or differential heat treatment.
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