pd4dPlease note that this Tip is used for Endodontic procedures The DTE PD4D ultrasonic tip features a diamond-coated (40µm) head desned for root canal orientation and the removal ofSize: PD4D Endo scaling tip can be autoclaved between 5-20 minutes at 134°C The PD4D are used to remove subgingival calculus and interdental calculus.