Endodontic File
OwnerJames Bahcall, Kris Olsen +3inventors
InventorsJames Bahcall, Kris Olsen, James DeVengencie, Mark Arthur Fiorina, Mark Andrew Fiorina
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Abstract
An endodontic instrument eliminates the need for conventional flutes by employing a tapered tip having an axially extending relief surface such as a flat permitting the passage of liquid and the ejection of debris from the tooth. In one embodiment, an abrasive surface of the tapered tip is produced by electrical discharge machining which provides randomly arrayed microscopic pits directly in the metallic surface of the instrument.
Claims18
An endodontic instrument for use with a powered hand-piece comprising:
- a shaft extending along an axis and having
- a first end adapted to engage a receiving chuck of a hand piece and
- a second end tapering toward the axis in a direction from the first end to the second end, a portion of the taper near the second end providing a first periphery substantially following a circumference about the axis and presenting an outwardly exposed cutting surface and a second periphery providing a recessed relief surface beneath the circumference extending in a line along the axis.
An endodontic instrument for use with a powered hand-piece comprising:
- a shaft extending along an axis and having
- a first end adapted to engage a receiving chuck of a hand piece and
- a second end tapering toward the axis in a direction from the first end to the second end, a portion of the taper near the second end providing an outwardly exposed cutting surface formed of a series of randomly placed microscopic pits.
A method for manufacturing an endodontic instrument comprising:
- (a) forming a metallic shaft extending along an axis and having a first and second end, the second end tapering toward the axis in a direction from the first end to the second end;
- and
- (b) placing the shaft proximate to an electrical discharge machining tool and applying a voltage across the tool and shaft to form a set of randomly placed microscopic pits in at least a portion of an outer periphery of the metallic shaft.
Dependencies are inferred from the claim text.