Comparison of two calcium hydroxide pastes used for endodontic treatment of non-vital immature incisor teeth.

A proprietary calcium hydroxide paste, Reogan Rapid, that previously has been demonstrated to induce apical closure in non-vital immature incisor teeth, was becoming unavailable. A prospective clinical trial was conducted to compare Reogan Rapid with another proprietary paste, Hypo-cal. For teeth treated with Reogan Rapid apical closure was obtained in an average of 6.8 months involving 3.1 visits and the respective figures for teeth treated with Hypo-cal were 5.1 months and 2.4 visits. These results demonstrated that Hypo-cal was as effective as Reogan Rapid when used in a standardised technique for inducing apical closure.