Table 1.

Characteristics of the two fluoride-based agents.

Material Description	Manufacturer	Trade Name	Chemical Composition (Ingredients)
Calcium-fluoride-forming solution	Humanchemie GmbH, Alfeld, Germany	Tiefenfluorid®	1st solution: magnesia fluoro silicate (F18Mg16Na10O66Si27), copper (II) fluoro-silicate (CuF6Si), sodium fluoride (NaF) as stabilizer, distilled water 2nd solution: calcium hydroxide (Ca(OH)2)—highly dispersed, methylcellulose (C6H7O2(OH)x(OCH3)y), distilled water
Fluoride varnish	Ultradent Inc., Cologne, Germany	EnamelastTM	flavored, xylitol-sweetened, 5% NaF (22,600 ppm F−) resin