Reciprocal reverse rotation endodontic file

Details Reciprocal reverse rotation endodontic file Reciprocal reverse rotation endodontic file

2008-08-18

2011-11-01

Wilson, John J (Department: 3732)

Dentistry

Apparatus

Broach

C206S369000

Reexamination Certificate

active

08047842

ABSTRACT:
A single use, reciprocal reverse rotation, endodontic file includes a plurality of spaced apart helical flutes with spiraled lands therebetween. The lands have an edge with a positive cutting angle when the file is rotated in one direction and a scraping angle when rotated in the opposite direction. The file provides for sequential rotation of a selected angle in a forward direction followed by rotation of a slightly less angle in a reverse direction. In one embodiment, the cross-sectional area of the flutes is concave polygonal-shaped at a proximal end of the file and square-shaped at the distal end. In another embodiment, the cross-sectional area of the flutes is convex arcuate-shaped, the lands lying normal to the central longitudinal axis of the file. The handle portion of the file may be configured for use in a rotary handpiece or for manual rotation.

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Extended European Search Report issued by the European Patent Office, Munich, Germany, dated Dec. 1, 2009 (6 pages).

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