Three-year Clinical Performance of Two Fluoride-Releasing Resin Materials in Class-I Restorations

Objectives: To evaluate clinical performance of a fluoride-releasing flowable resin composite material, Beautifil Flow Plus F00 (BF00), in restorations of occlusal lesions after three years and compare the results to a fluoride-releasing nano-hybrid resin composite, Beautifil II (BEII). Application times for two restorative materials were also compared.
Methods: Forty-four pairs of restorations of a flowable resin composite (Beautifil Flow Plus F00, Shofu) and a hybrid resin composite (Beautifil II, Shofu Inc) were placed in the Class-I cavities after application of dentin adhesive material (FL-Bond II, Shofu) and a flowable composite liner (Beautifil Flow Plus F03, Shofu). After three years, thirty-nine pairs of restorations were available for evaluation.The restorations were evaluated by using modified United States Public Health Service criteria at baseline (BL) and after three years. Digital color photographs of restorations were taken at each visit. Evaluation parameters were: color match, marginal integrity, marginal discoloration, retention, secondary caries formation, anatomic form, surface texture and postoperative sensitivity. Evaluations were recoded as clinically ideal situation (Alpha), clinically acceptable situation (Bravo) and clinically unacceptable situation (Charlie). Application time for each restoration was also recorded at baseline. Data were analyzed with Exact Fisher and McNemar tests (p<0.05).
Results: None of the restorations showed retention loss, postoperative sensitivity, secondary caries, or color change. For marginal integrity, two BF00 and four BEII were rated Bravo. There were no statistically significant differences between BL and three-year results of each material (p>0.05). Also, no statistically significant difference in overall clinical performance was found between two materials (p>0.05). Application time for BF00 restorations was significantly less (18.1 min) than application time for BEII restorations (25.9 min) (p<0.05).
Conclusions: The three-year clinical performance of both restorative materials (BF00 and BEII) was very good and not significantly different for each of the parameters evaluated. The short application time and easy handling of the flowable resin composite make it a promising material for Class-I restorations.