Intra- and Interindividual Observations on Fluoride Ion Activity and Retained Fluoride with Sodium Fluoride Mouth Rinses

Abstract

2-min mouth rinses with 7 and 10 ml 0.05% NaF were carried out by 9 adults and 24 children (10–11 years old). Each person rinsed 5 times with , fluoride each volume. The oral expectorate with the rinsing solu tion was then weighed. The fluoride ion activity of the expectorates was determined, and retention of fluoride (μg and %) was calculated. Significantly higher fluoride ion activity with 10 than with 7 ml was obtained both by the adults (14.7 ± 6.5 ppm F^-) and the children (9.0 ± 5.7 ppm F^-). The differences in retention with 10 vs. 7 ml rinses were significant: 64 ± 30μg (n = 9) and 89 ± 81 μg (n = 24). The percentage retention with 7 ml was 15.4 ± 2.6 (n = 9) and 14.1 ± 4.8 (n = 24), the corresponding values with 10ml were 13.6 ± 2.2 and 13.8 + 3.6. Each subject seemed to have a pattern in the amount of expectorated fluid and fluoride ion activity with the 7- and 10-ml volumes, whereas no retention pattern was indicated. The findings indicate that in programs using fluoride mouth rinses, 7 ml are preferable to 10 ml, as (1) reduced amounts of swallowed fluid probably cause decreased retention and (2) the anti-caries effect seems to be equal.

Oral Disposition of Triclosan (2,4,4′-Trichloro-2′-Hydroxydiphenyl Ether) Delivered from a Dentifrice

“…Ericson and Forsman [1969] looked at reten tion in 4-to 7-year old children and showed 26% of a 0.1 % fluoride paste to be retained. This figure is higher than that re ported by Bossert and Dunning [1945] (3-11% retention) and Birkeland [1973] (13-15% retention) after use of fluoride mouthrinses, but lower than that of Hellstrom [1960], who showed 30% retention following use of a 0.1% sodium fluoride mouthwash.…”

Topical Fluorides: A Discussion of Risks and Benefits

“…It has been shown that young children may retain some solution when they rinse (Hellstrom, 1960;Ericsson and Forsman, 1969;Birkland, 1973;Wei and Kanellis, 1983). The daily use of an over-the-counter rinse containing 225 ppm F [ mg F/5 mL] could produce or contribute to fluorosis in age-susceptible children, depending upon the total amount of bioavailable fluoride being consumed.…”

Preemptive Acquisition of Fluoride by Surface Enamel of Permanent Teeth after Daily Use of F Supplements (Short Communication)

“…It cannot be ruled out that the F rinses in the control group might have contributed to the preeruptive uptake of fluoride in the enamel. Thus, it has been shown [Birkeland, 1973] that about 15% of the fluoride in 10 ml of a 0.2% NaF solu tion is retained by young schoolchildren after mouthrinsing. Flowever, this intake of fluoride from 40 rinses in the control group would make a total of about 60 mg F as compared to 225 mg F in the supple ment group.…”