US2007059663A1PendingUtilityA1

Endodontic instrument

60
Individually held — no corporate assignee on recordPriority: May 1, 2003Filed: Aug 21, 2006Published: Mar 15, 2007
Est. expiryMay 1, 2023(expired)· nominal 20-yr term from priority
Inventors:Michael J. Scianamblo
A61C 5/42
60
PatentIndex Score
0
Cited by
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References
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Claims

Abstract

An endodontic instrument is described that has includes a shaft that includes an end, a tip, one or more flutes, and a longitudinal axis. At least one flute includes a cutting edge configured to cut when the shaft is rotated in a first direction of rotation about the longitudinal axis. The at least one flute does not spiral around the shaft in the first direction of rotation.

Claims

exact text as granted — not AI-modified
1 . An endodontic instrument, comprising: 
 a shaft having an shank end, a tip, one or more flutes and a longitudinal axis, wherein the instrument is narrower at the tip than the shank end, the instrument is configured to rotate about the longitudinal axis in a first direction, the flutes extend down at least a portion of the shaft and when viewed from the shank end, the flutes do not spiral in the first direction, at least one flute has a cutting edge configured to cut when the shaft is rotated in the first direction.    
   
   
       2 . The instrument of  claim 1 , wherein the first direction is clockwise.  
   
   
       3 . The instrument of  claim 2 , wherein the cutting edge is on a right had side of the flute.  
   
   
       4 . The instrument of  claim 1 , wherein the flutes spiral in a direction opposite to the first direction.  
   
   
       5 . The instrument of  claim 1 , wherein the one or more flutes have S-shaped splines.  
   
   
       6 . The instrument of  claim 4 , wherein the tip is a non-cutting tip.  
   
   
       7 . The instrument of  claim 4 , wherein the tip is a cutting tip.  
   
   
       8 . The instrument of  claim 1 , wherein the cutting edge of the flute has a zero cutting angle.  
   
   
       9 . The instrument of  claim 8 , wherein a cross section of the shaft has a quadrilateral-like shape.  
   
   
       10 . The instrument of  claim 8 , wherein a cross section of the shaft has a triangle-like shape.  
   
   
       11 . The instrument of  claim 1 , wherein the shaft is fabricated from one of Ni—Ti and Ni—Ti alloy.  
   
   
       12 . The instrument of  claim 1 , further comprising an attachment for coupling the shank end of the instrument to an engine operable to rotate the instrument.  
   
   
       13 . The instrument of  claim 1 , wherein the first direction is clockwise and the flutes spiral around the shaft in a counterclockwise direction.

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