COMPARISON OF FLUORIDE RELEASE FROM FLUORIDE RELEASING BONDING AGENTS

Praphasri Rirattanapong1, Pisol Senawongse2 and Sukumarn Setteetunyahan

Abstract

Fluoride releasing tooth sealants are widely used as a public health measure to prevent caries, but usually require bonding agents to prevent failure. The aim of this study was to measure and compare fluoride release from commercially available bonding agents in order to inform prescribing practices. The products evaluated were Clearfil liner F (LF), Optibond XTR (XTR), FL–Bond II (FLB). These were also compared to a non-fluoride releasing bonding agents as a control, Clearfil SE bond (SE). Five samples of each product were placed in a Teflon mold, placed in a dark sealed chamber for 12 hours and then light cured for 20 seconds. After that, each specimen was stored in a plastic container containing deionized water and incubated at 37°C. The fluoride ions released from each product were measured daily for 1 week and then weekly for 1 month with the first measurement taken 24 hours after preparation. The data were analyzed using the two-way ANOVA. A p-value<0.05 was considered statistically significant. SE (control) released 0.01 ppm of fluoride at day 1 and this remained the same for all the readings. LF released 0.39 ppm fluoride on day 1. This did not increase significantly for all readings. XTR released 4.06 ppm fluoride on day 1 and this continued to increase significantly to 6.33 ppm by 28 days. FLP released 3.21 ppm fluoride on day 1 and this also increased significantly to 7.10 ppm by 28 days. Our results show LF released less fluoride than XTR and FLB and this did not change significantly throughout the study. However, XTR and FLB did release more fluoride and those levels increased over the 28 days study period. This result can guide dental practitioners in the selection of the appropriate bonding agent for the appropriate subject. Further studies are needed to determine if these bonding agents result in different caries rates among human subjects in vivo.