The Effect of Acidulated Phosphate Fluoride (APF) on the Microleakage of Composite Flow and Fissure Sealant Restorations
Author(s): Leila Basir, Masoume Khataminia, Elahe Babashahi, Ali Rohani
Fluoride therapy and fissure sealant are the main methods in the prevention of caries in children. However, even though many studies have reported an increased use of these two tratement, there has been very little research reported on the effectiveness of such use. The aim of this study was to evaluate the topical effect of APF gel on the microleakage of composite resin that is used as fissure sealant. A total of 60 healthy premolar teeth extracted for orthodontic treatment were disinfected and brushed by pumice in accordance with APF composite (Sultan, USA) restorations and treatment instruction and were divided into 4 groups of 15 (4 x 15): Group1) nanohybrid composite (Grandio flow, Voco) + saline, Group2) nanohybrid composite (Grandio flow, Voco) + APF, Group3) microhybrid composite (Arabesk flow, voco) + saline, Group4) microhybrid composite (Arabesk flow, voco) + APF. All samples were subjected to a thermo-cycling process and then were immersed in a methylene blue solution with a 30 second dwell time. The samples were cut and the microleakage was analyzed and sectioned by stereomicroscope (Magnus) at 40x magnification. Data were analyzed by Mann-whitney test. Mann-whitney test indicated that no significant difference exists between the microleakage of groups 1 and 2 (P=0.775), 3 and 4 (P=0.436).Group 4 demonstrated higher microleakage scores than other groups whereas group1 showed the lowest microleakage value when compared with other groups tested. Although the results did not show statistically significant differences, it is suggested that low composite resin and smaller filler particles particularly nanohybrid composites were found to be the best products in this group.But, given the negligible effect of the composites, the non-acidic fluoride material is recommended for composite restorations.