ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,496,175, issued on Dec. 16, was assigned to Dentsply Sirona Inc. (York, Pa.).
"Method and arrangement for cleaning of a canal" was invented by Thomas Ertl (Ranstadt, Germany) and Rolf Diebolder (Ulm, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method and an arrangement for the cleaning of a circumferentially closed canal using a light guide conducting a laser beam, with the entry of the laser beam into the light guide being interrupted when the free end of the light guide is outside of the canal and/or the movement of the light guide within the canal is monitored and if there is no movement or the movement is below a first threshold value t...