Abstract:

ObjectiveTo observe the clinical effect of ultrasonic bulk resin in restoration of primary molar defect after root canal therapy.MethodsTotally 78 children(126 primary molars) were included in the study, and they were randomly divided into two groups according to their visit to the hospital: 40 children(64 molars) in observation group and 38 children(62 molars) in control group. In observation group, the children were treated with SonicFill ultrasonic resin after root canal therapy, while the children in control group received Filtek Z350 resin after root canal therapy. The operation time, satisfaction after surgery, and the integrity, edge fitness and staining at 6 and 12 months after treatment were compared between the groups.ResultsThe operation time of experimental group was lower than that of control group, there was significant difference between two groups（P<0.05）.There was no significant difference between the two groups in postoperative satisfaction degree（P>0.05）. There was no significant difference between the two groups in integrity, edge fitness or staining after a follow-up of 6 months and 12 months（P>0.05）.ConclusionUltrasonic bulk resin in restoration of primary molar defect after root canal therapy can get superior clinical effect in a short time, and the operation time is shortened. It provides a better choice for resin filling in the tooth therapy for children.

Key words:

Tooth defect, Root canal therapy, Primary molar, Bulk resin, Child