Piezotome® ET tips are titanium-niobium alloy ultrasonic tips engineered for the demanding tasks of endodontic access, retreatment, perforation repair, apicoectomy and broken-instrument retrieval. They fit Acteon's Newtron and Piezotome generators and most include a built-in irrigation port for continuous coolant lavage during prolonged ultrasonic activation. Key tips in the range: ETBD (diamond ball, locating calcified canals and exploring the pulp chamber floor), ET18D (eliminating dental overhangs, intra-chamber calcifications and temporary fillings), ET20 / ET25 / ET25S / ET25L (coronal-third interventions, removing root canal fillings, debris, broken instruments), ET40 / ET40D (heavier removal of restorative material), ETPR (loosening and extracting root canal posts) and ETBD diamond-coated variants for hardened deposits. Diamond-coated variants extend service life on enamel and ceramic interfaces.