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 ofPD4D is used for endodontics, to remove calcification in the coronal third of the root canal, diamond coated. PD1 is used for Periodontics, periodontal scaling.