The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2018
Filed:
Jun. 20, 2014
Applicant:
Dentsply International Inc., York, PA (US);
Inventors:
Vincent Shotton, Broken Arrow, OK (US);
Dan Ammon, Tulsa, OK (US);
Assignee:
DENTSPLY SIRONA, INC., York, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
A61C 5/02 (2006.01); A61C 5/42 (2017.01);
U.S. Cl.
CPC ...
A61C 5/023 (2013.01); A61C 5/42 (2017.02);
Abstract
A rotatable endodontic file for cleaning/shaping a tooth root canal, comprising: an elongated shaft having a proximal end portion, a distal end and a tapered working portion having a rotational axis, the working portion extending from said proximal portion to said distal end; the external surface of said shaft working portion having a plurality of at least two spirals, a parallelogram-shaped cross section that has an axis of rotation that is asymmetric such that the center of mass (centroid) is not along the file axis.