Influence of Soft Drink Intake on the SalivarypH of Schoolchildren

Abstract

Objective: To evaluate the influence of Coca-Cola ® consumption on the salivary pH of 12-year old children. Material and Methods: The convenience sample was composed of forty-five 12-year old students of both genders from public schools of Itatiba, state of São Paulo, Brazil. Salivary pH was measured with pH colorimetric tape indicator (Merck). The reading of the colorimetric method was made by an experienced evaluator under uniform lighting conditions. The colorimetric tape was positioned in the back of the student's tongue, which remained with the mouth shut for 30 Seconds. For control, the first measurement (T0) was performed before the intake of the soft drink (baseline pH). Subsequently, students were instructed to slowly drink 100 ml of Coca-Cola ® using a plastic disposable cup. Immediately after ingestion, the pH was measured again with the colorimetric tape (t1). The oral pH values were also measured 5 minutes (t2), 10 minutes (t3) and 15 minutes (t4) after the soft drink intake, keeping the tape positioning always the same in all measurements. The statistical SAS software was used for data analysis. Comparisons of oral pH values at different times were performed by the Tukey-Kramer test adopting 5% significance level. Results: Immediately after soft drink intake, the salivary pH significantly decreased (pH = 6.26) (p <0.05) compared to baseline (pH = 7.23) (p <0.05). Fifteen minutes after ingestion, although an increase in the pH was observed (pH = 6.64), it had not yet returned to baseline (T0) (p <0.05). Conclusion: Coca-Cola ® intake caused a significant reduction in salivary pH, without, however, reaching critical pH for enamel demineralization.

Efek konsumsi minuman berkarbonasi dan minuman rasa jeruk terhadap pH saliva pada mahasiswa PSPDG Fakultas Kedokteran Universitas Udayana

“…yang menyatakan terjadi penurunan pH saliva segera setelah mengonsumsi minuman berkarbonasi, yaitu dari pH baseline 7,23 menjadi 6,26. 14 Penelitian yang dilakukan oleh Takahashi dkk. menyebutkan penurunan rata-rata pH saliva terendah pada subjek yang mengonsumsi jus jeruk terjadi segera setelah konsumsi, yaitu 6,1±1,6 kemudian kembali seperti pH awal (7,2±0,5) setelah 600 detik.…”

The effect of sugar-sweetened carbonated soda and carbonated mineral water on the salivary pH value

“…The studies have mostly been done in vitro, focusing on examining the buffering capacity of saliva or the ability of acidic beverages to damage the teeth enamel and dentin [6][7][8][9][10][11][12]. In vivo studies have been carried out on children and young people aged 18-25 by measuring the salivary pH value at different intervals after taking fruit juices, teas, wine or consuming certain types of sweets or foods [1,4,5,[13][14][15][16][17][18][19][20]. In vivo findings on the salivary pH values in humans after taking carbonated mineral water and sugar-sweetened soda at different time intervals in the scientific literature are few.…”

In Vitro Analysis of the Erosive Potential of Whey Protein

“…The amount and frequency of consumption of acidic foods and beverages has increased in recent years, mainly due to changes in the lifestyle of the population (Almenara et al, 2016). Changes in the eating habits of the Brazilian population have also been reflected in the high consumption of nutritional supplements, especially by people who practice physical activities and go to the gym (Hallak et al, 2007).…”