US 2024/0325112 A1Published application

Cutting tool for removing broken endodontic instrument

AssigneeKing Faisal University

InventorNAZARGI MAHABOB

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Abstract

The cutting tool for removing a broken endodontic instrument is an attachment for a low rpm dentist's drill. The cutting tool is a hollow shaft having a drill attachment end adapted for attachment to the head of the dentist's drill and a tooth-engaging end. The tooth-engaging end of the hollow shaft has a plurality of cutting teeth for removing dentin, pulp, and other material in the area around the broken endodontic instrument. The cutting teeth may extend axially from the end of the hollow shaft or may extend laterally from the end of the hollow shaft. The cutting teeth may be sharp on both sides or edges so that the hollow shaft may be rotated either clockwise or counterclockwise, as needed. The hollow shaft is preferably made from a flexible, biocompatible material, such as a nickel-titanium alloy.

Claims6

Dependent claims

A cutting tool for removing a broken endodontic instrument,

comprising a hollow shaft adapted for attachment to a dentist's drill capable of rotating an attachment, the hollow shaft having a drill attachment end adapted for attachment to a head of the dentist's drill and an open end opposite the drill attachment end, the open end of the hollow shaft having a plurality of cutting teeth extending therefrom, said plurality of cutting teeth being spaced apart and having an axial gap therebetween on the open end of the hollow shaft, the cutting teeth being rectangular and configured for cutting dentin and pulp from a dental root canal in an area surrounding the broken endodontic instrument to permit removal by a gripping tool of the broken endodontic instrument from the dental root canal, wherein a size of the drill attachment end of the hollow shaft is equal to a size of the open end of the hollow shaft.

Dependencies are inferred from the claim text.