Endodontic file having bi-directional scraping edges

• US 20070031783A1
• Filed: 08/02/2005
• Published: 02/08/2007
• Est. Priority Date: 08/02/2005
• Status: Active Grant

• Current Assignee: Arnaldo Castellucci, Elio Vincenzo Giovanni Berutti, Giuseppe Cantatore
• Original Assignee: Arnaldo Castellucci, Elio Vincenzo Giovanni Berutti, Giuseppe Cantatore
• Inventors: Castellucci, Arnaldo, Cantatore, Giuseppe, Berutti, Elio Vincenzo Giovanni
• Granted Patent: US 7,300,281 B2
• Time in Patent Office: Days
• US Class Current: 433/102
• CPC Class Codes: A61C 5/42 Files for root canals; Handgrips or guiding means therefor

Abstract

An endodontic file having an elongated shank with a proximal end portion, a distal end and a tapered working portion extending from the proximal portion to the distal end, the external surface of the shank working portion being defined in part by a plurality of at least two equally spaced apart continuous helical flutes formed into a central core portion of the shank working portion, the flutes having therebetween an equal number of spiraled spaced apart flanges, each flange having a semi-circular surface having a leading edge and a trailing edge, each edge being in or parallel to a plane of the shank longitudinal axis, each leading and trailing edges providing a cutting or scraping edge.

Claims

1. A dental reamer/file comprising:

an elongated shank having a proximal end portion, a distal end and a tapered working portion extending from said proximal portion to said distal end;

the external surface of said shank working portion being defined in part by a plurality of at least two equally spaced apart continuous helical flutes formed into a central core portion of said shank working portion, the flutes having therebetween an equal number of spiraled spaced apart flanges, each flange having in a plane perpendicular to the length of said shaft, a semi-circular surface having a leading edge and a trailing edge, each edge being essentially in or parallel to a plane of the shank working portion longitudinal axis, each said leading edge providing a cutting/scraping edge.

2. A dental reamer/file according to claim 1 wherein each said leading edge is at a negative angle relative to a plane of said longitudinal axis providing a positive cutting edge.

3. A dental reamer/file according to claim 1 wherein each said leading edge is at a positive angle relative to a plane of said longitudinal axis providing a negative scraping edge.

4. A dental reamer/file according to claim 1 wherein each said leading edge is at a neutral angle relative to a plane of said longitudinal axis providing a neutral cutting/scraping edge.

5. A dental reamer/file according to claim 1 wherein said semi-circular surface of each of said flute is concentric to said shaft working portion longitudinal axis.

6. A dental reamer/file according to claim 1 wherein each said flange semi-cylindrical surface is concentric to said shaft working portion longitudinal axis.

7. A dental reamer/file according to claim 1 wherein each said flange semi-cylindrical surface is of increased radius and non-concentric to said shaft working portion longitudinal axis.

8. A dental reamer/file according to claim 1 wherein each said flange semi-cylindrical surface is of increased radius and non-concentric to said shaft working portion longitudinal axis and wherein each said leading edge is at a negative angle relative to a plane of said longitudinal axis providing a positive cutting edge.

9. A dental reamer/file according to claim 1 wherein each said leading edge and each said trailing edge provides a cutting/scraping edge active in response to the direction of rotation of said shaft.

10. A dental reamer/file useable by reversible rotation and manipulation in a tooth root canal comprising:

an elongated shank having a proximal end portion, a distal end and a tapered working portion extending from said proximal portion to said distal end;

the external surface of said shank working portion being defined in part by a plurality of at least two equally spaced apart continuous helical flutes formed into a central core portion of said shank working portion, the flutes having therebetween an equal number of spiraled spaced apart flanges, each flange having in a plane perpendicular to the length of said shaft, a surface having beginning and ending edges, each edge being defined by an abrupt decrease in external surface diameter and each edge providing a cutting/scraping edge.

11. A dental reamer/file according to claim 10 Wherein each said edge is at a negative angle relative to a plane of said longitudinal axis providing a positive cutting edge.

12. A dental reamer/file according to claim 10 wherein each said edge is at a positive angle relative to a plane of said longitudinal axis providing a negative scraping edge.

13. A dental reamer/file according to claim 10 wherein each said edge is at a neutral angle relative to a plane of said longitudinal axis providing a neutral cutting/scraping edge.

14. A dental reamer/file according to claim 10 having two said helical flanges, providing in planes perpendicular the length of said shaft four said edges.