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US 4,934,934 AGranted
Dental file/reamer instrument
AssigneeQuality Dental Products, Inc.
InventorsJerry Arpaio, Jr., Derek E. Heath
Life of this patent
Estimating the term…
Abstract
A dental instrument adapted to be used as a dental file and dental reamer for removing dead or damaged tissue from the root canal of a tooth. The dental compactor instrument is formed with a tapered shank having at least two helical flutes defining at least two continuous helical cutting edges. A helical peripheral land extends between the helical flutes at the periphery of the shank. The cutting edges have a neutral rake angle.
Claims8
A dental reamer/file instrument comprising:
- a shank;
- a tapered working portion along at least a portion of the length of said shank;
- flute means formed in the working portion of the shank defining at least two continuous helical flutes having helical cutting edges at the periphery of said working portion of said shank and being equally spaced apart about the circumference of said shank;
- said helical cutting edges have a substantially neutral rake angle at the periphery of said working portion of said shank;
- and,
- a helical land at the periphery of the working portion of said shank extending between adjacent flutes.
3 more elements
Dependencies are inferred from the claim text.