pd4dPD4D is used for endodontics, to remove calcification in the coronal third of the root canal, diamond coated. PD1 is used for Periodontics, periodontal scaling.PD4D Quad Dital Decoder Specification ASI Input Connector 1 x 50 Ω BNC Format DVB-ASI (EN50083-9) Rate (Transport Stream) 160 Mbps Packets Sizes 188204 (AUTO) IP Input