"Ongoing Trials: Studies have recently begun to evaluate the ability of silver diamine fluoride to arrest interproximal carious lesions, to compare the relative efficacy of silver diamine fluoride to the combination of silver nitrate plus fluoride varnish and to compare the effects on populations with or without access to fluoridated water. Final reports from these studies will follow in the coming years". "Although many fell out, GIC or resin sealants outperformed silver diamine fluoride in preventing caries in the first molars of children, though the cost was ~20 times more".