ABSTRACT
Objective: The aim of this study was to examine the effect of temperature on fluoride
uptake by enamel specimens from a 0.05% NaF-fluoridated mouthrinse (Oral-B Advantage;
Oral-B Laboratories, Newbridge, UK).
Methods: Enamel specimens were prepared from extracted human maxillary central incisors.
A fluoride-specific ion electrode was used to measure the uptake from a 2 ppm fluoride
solution containing 50.0 mL of distilled water, total ion strength adjustment buffer,
and fluoridated rinse at 3 different temperatures (room temperature, 25°C; human body
temperature, 37°C; hyper-fever temperature, 43°C). One-way analysis of variance and
least significant difference were used to assess intragroup and intergroup differences
(P<.05).
Results: The study found that both the amount and the rate of fluoride uptake increased
significantly with increase in temperature. This effect was particularly noticeable
at 43°C.
Conclusions: The temperature of the NaF mouthrinse may easily and safely be increased
beyond room temperature by placing a container of the NaF mouthrinse in a bowl of
hot water, allowing greater fluoride penetration into the enamel from the mouthrinse
when used at home as a routine prophylactic agent. (Eur J Dent 2012;6:361-369)
Key words
Fluoride uptake - temperature - enamel - mouthrinse
