Processed dairy beverages pH evaluation: consequences of temperature variation.
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.
Ferreira
Fabiana Vargas
FV
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
Pozzobon
Roselaine Terezinha
RT
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*