Endogenous pH, Titratable Acidity and Total Soluble Solid Content of Mouthwashes Available in the Brazilian Market.
OBJECTIVE
To evaluate in vitro the endogenous pH, titratable acidity and total soluble solid content (TSSC) of mouthwashes available in the Brazilian market.


METHODS
The study sample was composed of 10 commercial brands of mouthwashes based on different active ingredients: Cepacol(R), Clinerize(R), Equate(R), Listerine Cool Citrus(R), Oral-B(R), Periogard(R), Peroxyl(R), Plax Overnight(R), Prevident 220(R) and Sanifill(R). The experiments were performed in triplicate. The endogenous pH was evaluated by potentiometry, titratable acidity was evaluated by the addition of 0.1N KOH increments to the mouthwashes, and TSSC readings were performed by Brix refractometry using the Abbé refractometer.


RESULTS
pH values ranged from 3.56 (Peroxyl(R)) to 7.43 (Cepacol(R)) and three mouthwashes presented pHs below 5.5. The titratable acidity values ranged from 0.007 (Periograd(R)) to 0.530 (Prevident(R)). Oral B(R) and Clinerize(R) presented the lowest (4.7%) and the highest (23.70%) TSSC, respectively.


CONCLUSIONS
Some of the mouthwashes evaluated in this study presented low endogenous pH, even below the critical value for enamel dissolution (pH<5.5), high titratable acidity and high TSSC, and may be potentially erosive to the dental tissues if not properly used.
Cavalcanti
Alessandro Leite
AL
DDS, MSc, PhD, Professor, Department of Pediatric Dentistry, School of Dentistry, State University of Paraiba, Campina Grande, PB, Brazil.
Ramos
Ianny Alves
IA
Leite
Rafaela Bastos
RB
da Costa Oliveira
Mariana
M
de Melo Menezes
Karynna
K
Fernandes
Lígia Virgínio
LV
de Castro
Ricardo Dias
RD
Vieira
Fernando Fernandes
FF
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