One-Year Clinical Evaluation Of Bulkfill Restorations In Primary Molars

To provide reference for a more suitable type of bulkfill resin in primary teeth filling. Nanocomposite resin (group A) and giomer (group B) were used as controls, high-viscosity bulkfill resin (group C) and sonic-activated bulkfill resin (group D) were studied. A total of 140 primary molars from 42 children with occluso-proximal caries were selected. The carious teeth were filled with each group of resins randomly (n=35). The operation time of each tooth was recorded, and compared. The restorations of each group were evaluated by modified USPHS criteria at 6- and 12-months follow-up. Kaplan-Meier method was used to draw the survival curve of each group. The operation time of group A (86.02±1.76)s and B (86.14±1.50)s were significantly longer than group C (58.68±1.40)s and D (59.39±1.82)s (P<0.05), and the operation time were similar in group A and B, and in group C and D (P>0.05). The clinical efficacy of each group at 6- and 12-months follow-up were similar (P>0.05). The 1-year survival rates of group A,B,C and D were 87.5%, 81.3%, 84.4% and 76.7% respectively (P>0.05). High-viscosity and sonic-activated bulkfill resin were similar in clinical efficacy and survival rate to nanocomposite resin and giomer, with shorter operation time, and might be an option for primary teeth filling.