Document Classification

Section Type: METHODS

Text: During each experimental period, as the only oral hygiene measure, the students rinsed twice a day with one of the following formulations (in a randomised order) : a 0. 2 % chlorhexidine-alcohol mouthrinse (CHX-Alc), a 0. 05 % CHX + 0. 05 % cetylpyridinium chloride + 0. 14 % zinc lactate mouthrinse (CHX-CPC-Zn), an amine fluoride/stannous fluoride (125 ppm F - / 125 ppm F -) containing mouthrinse (AmF/SnF2Mr), a slurry of a tooth paste (AmF/SnF2Sl) containing amine fluoride (350 ppm F -) and stannous fluoride (1050 ppm F -) and a placebo solution (placebo).