Endogenous pH, Titratable Acidity and Total Soluble Solid Content of Mouthwashes Available in the Brazilian Market

Abstract

Objectives: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®, Clinerize®, Equate®, Listerine Cool Citrus®, Oral-B®, Periogard®, Peroxyl®, Plax Overnight®, Prevident 220® and Sanifill®. 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®) to 7.43 (Cepacol®) and three mouthwashes presented pHs below 5.5. The titratable acidity values ranged from 0.007 (Periograd®) to 0.530 (Prevident®). Oral B® and Clinerize® 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.

Endogenous pH, titratable acidity of commercially available mouthwashes in Indian market

“…2,6 The measurement of the pH is a practical method to assess the erosive potential by measuring acidity of a solution. 1,7 Although pH value equal to or less than 5.5 is considered critical for enamel dissolution, mineral loss may begin even at higher pH;6. pH is a logarithmic scale. Small changes in pH values equate with larger changes in the hydrogen ion concentration therefore, the prolonged use of oral rinses with pH below this value may be potentially harmful to dental tissue.…”

“…In the present study, six mouthwashes which had pH values below the critical value assumed for dental demineralization were classified as potentially erosive (pH<5.5), corroborating the findings of previous investigations done by Cavalcanti AL et al, in Brazil and Pretty IA in UK. 1,3 The low pH of oral care products increases the chemical stability of some fluoride compounds and favors the incorporation of fluoride ions into the lattice of hydroxyapatite and the precipitation of calcium fluoride onto the tooth surface. Based on this statement, product labels were examined to identify mouthwashes containing fluoride.…”

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Various studies have demonstrated that acidic and low pH (less or equal to 5.5) mouthwashes can cause dental demineralization, erosion and significant loss of enamel within the first few minutes of contact with such acidic solution. 1 The erosive potential depends on low pH and ABSTRACT Background: The objective of this study was to evaluate in vitro the endogenous pH, titratable acidity of mouthwashes available in the Indian market. Methods: The study sample was composed of 11 commercial brands of mouthwashes based on different active ingredients.

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Avaliação da Concentração de Flúor, do pH, da Viscosidade e do Teor de Sólidos Solúveis Totais em Enxaguatórios Bucais Fluoretados Disponíveis Comercialmente na Cidade de Manaus – AM

“…Fato que, somado à ampla divulgação dos fabricantes, que em seus apelos geralmente não consideram as corretas indicações e não enfatizam os alertas de uso, por alguns componentes presentes em suas formulações, podem aumentar a predisposição à erosão, a lesões de tecidos moles e à cárie dental em alguns indivíduos. Parece que os potenciais riscos/efeitos colaterais dos enxaguatórios bucais são provenientes de três fontes: propriedades físico-químicas, como pH e acidez titulável; substância(s) ativa(s) e outros ingredientes, como o álcool [6][7] . Este estudo se propôs a avaliar a concentração de fluoretos, o potencial hidrogeniônico (pH), os valores de viscosidade e o teor de sólidos solúveis totais de soluções fluoretadas para bochecho disponíveis comercialmente na cidade de Manaus-Amazonas.…”

“…Outra justificativa é que um pH baixo proporciona a redução no metabolismo do biofilme dental em relação à via glicolítica (fermentação) e à produção de polissacarídeos extracelulares. Apesar desses benefícios, a literatura afirma que um pH muito baixo associado à ausência de flúor é potencialmente prejudicial aos tecidos dentais, levando a sua desmineralização 3,7 .…”