Fluoride Release and Physical Properties of High Fluoride Materials

Materials containing 5% NaF have recently been approved by the FDA. Among these are AURALay XF, a pit and fissure sealant, and other 5%NaF varnishes such as Omni, 3M. Objectives: The fluoride release of some of these materials compared to traditional glass ionomer (GI) materials is still unknown as well as their long term physical properties and clinical performance. Methods: Fluoride release was measured using an ion-specific electrode for the GI Ketac, 3M/ESPE; GI Fuji, GC Corp; GI by RiteDent; and the VLC resin materials AURALay XF, a 5% NaF sealant, and AURALay a traditional sealant both Denali Corporation; and a clear resin material AURAVue, Denali Corporation, over a period of 3 months. Compressive strengths for these products (n=15) was measured at 1d, 10d, and 30d. Results:

Fluoride Release at Day 10 (ppm F-)

AURALay XF	RiteDent	Ketac	Fuji GC	AURAVue	AURALay
242.0	172.0	27.3	6.57	4.34	0.83

Compressive Strengths at Day 30 (psi)

AURALay XF	Fuji GC	Ketac	RiteDent
24,000±1650	21,100±3200	12,000±1300	7100±900

Conclusion: Surprisingly, not all glass ionomers were found to release high levels of fluoride. AURALay XF and GC RiteDent were found to have the greatest fluoride release. AURALay XF and Fuji were found to have greater strength than GC RiteDent and Ketac (p<0.05) over 30 days.