US Patent Issued on May 13 for "Endodontic instrument with enlarged chip space and reduced torque strength" (Oklahoma Inventor)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,295,805, issued on May 13.

"Endodontic instrument with enlarged chip space and reduced torque strength" was invented by William B. Johnson (Tulsa, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An endodontic instrument of this disclosure has less torque strength but greater flexibility and enlarged chip space compared to the prior art. In embodiments. only two flutes are spiraled about the instrument's length L to form two non-landed cutting edges between D2 and D16, the cutting edges merging to form a land at about D1. The tip end is rounded. The helical angle Alpha increases from the handle end toward the tip end, a number of spirals per unit le...