Abstract: Objective: To evaluate the clinical effect of children rubber dam during root canal treatment in primary teeth. Methods: Forty cases in the rubber dam group and cotton roll+suction tube group were selected, respectively. The FrankI score, Houpt score, clinical operation time, and postoperative intention of two groups were recorded, respectively. Results: There was no difference in FrankI score between two groups. There were significant differences in the Houpt score, clinical operation time, and postoperative intention between two groups (P<0.05). The children who used the rubber dam had higher treatment compliance and shorter clinical operation time. More children were willing to use the rubber dam again. Conclusion: Rubber dam should be promoted because it can reduce the time of clinical operation and improve the treatment compliance of children.

Key words: Children rubber dam, Primary teeth, Root canal therapy