title: Processed dairy beverages pH evaluation: consequences of temperature variation.
abstract: OBJECTIVE
  This study assessed the pH from processed dairy beverages as well as eventual consequences deriving from different ingestion temperatures.
  
  
  METHODS
  50 adults who accompanied children attended to at the Dentistry School were randomly selected and they answered a questionnaire on beverages. The beverages were divided into 4 groups: yogurt (GI) fermented milk (GII), chocolate-based products (GIII) and fermented dairy beverages (GIV). They were asked which type, flavor and temperature. The most popular beverages were selected, and these made up the sample. A pH meter Quimis 400A device was used to verify pH. The average pH from each beverage was calculated and submitted to statistical analysis (Variance and Tukey test with a 5% significance level).
  
  
  RESULTS
  for groups I, II and III beverages, type x temperature interaction was significant, showing the pH averages were influenced by temperature variation. At iced temperatures, they presented lower pH values, which were considered statistically significant when compared to the values found for the same beverages at room temperature.
  
  
  CONCLUSIONS
  All dairy beverages, with the exception of the chocolate-based type presented pH below critical level for enamel and present corrosive potential; as to ingestion temperature, iced temperature influenced pH reducing its values, in vitro.
authors.affiliation: Dental Science Post-Graduate Program, Pediatric Dentistry, Department of Stomatology, Dentistry School, Federal University of Santa Maria, Rio Grande do Sul, Brazil. fabivfer@yahoo.com.br
authors.forename: Fabiana Vargas
authors.initials: FV
authors.lastname: Ferreira
authors.forename: Roselaine Terezinha
authors.initials: RT
authors.lastname: Pozzobon
mesh_terms: D000328:Adult; D000818:Animals; D002099:Cacao / Q000009:adverse effects; D002648:Child; D003080:Cold Temperature / Q000009:adverse effects; D043302:Cultured Milk Products / Q000009:adverse effects; D003731:Dental Caries / Q000209:etiology*; D004032:Diet / Q000009:adverse effects; D004037:Diet, Cariogenic; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008892:Milk / Q000009:adverse effects*; D011795:Surveys and Questionnaires; D014077:Tooth Erosion / Q000209:etiology*