UltraCal XS is a uniquely formulated calcium hydroxide preset paste that is both aqueous and radiopaque, with a high pH (12.5). It is recommend the larger 29ga NaviTip tip be used for predictable flow, enabling direct placement. UltraCal XS can be thoroughly removed from the canal using Ultradent Citric Acid and a NaviTip FX tip. Second-visit protocol with an intertappointment medication with calcium hydroxide resulted in improved microbiological status of the root canal system when compared with a single-visit protocol. Radiopaque High pH Superior at delivery control