Objective: To observe and compare the clinical effects of pulp capping with chemical-cured calcium hydroxide Dycal and light-cured calcium hydroxide Lime-Lite ^[TM]. Methods: 78 patients with direct pulp capping and 86 patients with indirect pulp capping were randomly divided into two groups, Dycal and Lime-Lite ^[TM] were used for pulp capping respectively, and the curative effects were compared. Results: After treament, the effective rates between Dycal and Lime-Lite ^[TM] with indirect pulp capping had no statistical differences (P>0.05). After treatment, the effective rate of Dycal with direct pulp capping was obviously higher than that of Lime-Lite ^[TM] (P<0.05). Conclusions: Dycal is more effective than Lime-Lite ^[TM] with direct pulp capping, so it is worthy to be popularized in clinical application.

Objective: To observe the clinical effects of Duraphat combined with pit and fissure sealing on preventing first permanent molar caries in children. Methods: 98 teeth in 26 children undergoing pit and fissure sealing were randomly divided into two groups, 49 teeth in each group. The teeth in control group were treated with pit and fissure sealing alone, while the teeth in test group were treated wtih Duraphat combined with pit and fissure sealing. The retention rate of pit and fissure sealant and caries status were observed and compared of 2 groups 6, 12, 18 months after treatment respectivly. Results: 6 months after treatment, no dental caries were found in all children's first permanent molars. There was no significant differences in caries prevalence rate between 2 groups 12 months and 18 months after treatment (P>0.05). 18 months after treatment, the retention rate of pit and fissure sealant of test group was obviously higher than control group (P<0.05); while the decay filled teeth, the decay filled surface of pit and fissure surface and the decay filled surface of even surface were obviously lower (P<0.05). Conclusions: Preventing first permanent molar caries in children with Duraphat combined pit and fissure sealing can obtain better effects, so it is worthy to be popularized in clinical application.