Sour Gummy Candies and their Effect on Salivary pH kinetics

Patrícia Rezende dos Reis Oliveira, Flávia Lucisano Botelho Amaral, Fabiana Mantovani Gomes França, Roberta Tarkany Basting, Cecilia Pedroso Turssi


Objective: This randomized controlled crossover clinical trial monitored the kinetics of salivary pH over time following the consumption of sour gummy candy. Material and Methods: Twenty participants underwent saliva assessment for flow, pH and buffer capacity. Following a two-arm crossover layout, the participants chewed a piece of a sour and a piece of an ordinary (control) gummy candy for 20 seconds. Participants expectorated saliva at 18 time points: immediately after ingesting the candies; then after every 15 second interval, for up to 1 minute; 30 seconds up to 4 minutes; 60 seconds up to 10 minutes; and at 15 minutes. The pH of the collected samples was measured with a pH microelectrode. The data concerning the pH measurements of the whole saliva samples collected over time following chewing of sour and ordinary gummy candies underwent repeated-measures three-way analysis of variance (ANOVA) using a significance level of 5%. Results: Repeated-measures three-way analysis of variance demonstrated a significant interaction between the type of candy and time (p<0.001). Tukey’s test revealed that with the consumption of sour gummy candy, the salivary pH showed an initial marked exponential drop and remained lower than that observed with the consumption of the ordinary version for up to 120 seconds. Conclusion: The consumption of sour gummy candy induces a major, transient fall in salivary pH, which may represent a risk factor for dental erosion.


Saliva; Candy; Hydrogen-Ion Concentration; Tooth Wear

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Vered Y, Lussi A, Zini A, Gleitman J, Sgan-Cohen HD. Dental erosive wear assessment among adolescents and adults utilizing the basic erosive wear examination (BEWE) scoring system. Clin Oral Investig 2014; 18(8):1985-90. doi: 10.1007/s00784-013-1175-0.

Salas MM, Nascimento GG, Vargas-Ferreira F, Tarquinio SB, Huysmans MC, Demarco FF. Diet influenced tooth erosion prevalence in children and adolescents: results of a meta-analysis and meta-regression. J Dent 2015; 43(8):865-75. doi: 10.1016/j.jdent.2015.05.012.

Mulic A, Fredriksen Ø, Jacobsen ID, Tveit AB, Espelid I, Crossner CG. Dental erosion: Prevalence and severity among 16-year-old adolescents in Troms, Norway. Eur J Paediatr Dent 2016; 17(3):197-201.

Lussi A, Carvalho TS. Erosive tooth wear: A multifactorial condition of growing concern and increasing knowledge. Monogr Oral Sci 2014; 25:1-15. doi: 10.1159/000360380.

Barbour ME, Lussi A. Erosion in relation to nutrition and the environment. Monogr Oral Sci 2014; 25:143-54. doi: 10.1159/000359941.

Hara AT, Zero DT. The potential of saliva in protecting against dental erosion. Monogr Oral Sci 2014; 25:197-205. doi: 10.1159/000360372.

Shellis RP, Featherstone JD, Lussi A. Understanding the chemistry of dental erosion. Monogr Oral Sci 2014; 25:163-79. doi: 10.1159/000359943.

Sánchez GA, Fernandez de Preliasco MV. Salivary pH changes during soft drinks consumption in children. Int J Pediatr Dent 2009; 13(4):251-7. doi: 10.1046/j.1365-263X.2003.00469.x.

Lussi A, von Salis-Marincek M, Ganss C, Hellwig E, Cheaib Z, Jaeggi T. Clinical study monitoring the pH on tooth surfaces in patients with and without erosions. Caries Res 2012; 46(6):507-12. doi: 10.1159/000339783.

Turssi CP, Silva CS, Bridi EC, Amaral FLB, França FMG, Basting RT. Kinetics of salivary pH after acidic beverage intake by patients undergoing orthodontic treatment. Gen Dent 2015; 63(3):26-30.

Ireland AJ, Mc Guinness N, Sherriff M. An investigation into the ability of soft drinks to adhere to enamel. Caries Res 1995; 29(6):470-6.

Aljawad A, Morgan MZ, Fairchild R, Rees JS. Investigation of the erosive potential of sour novelty sweets. Br Dent J 2017; 222(8):613-20. doi: 10.1038/sj.bdj.2017.363.

Davies R, Hunter L, Loyn Rees J. Summary of sour sweets: A new type of erosive challenge? Br Dental J 2008; 204(2):84-5. doi: 10.1038/bdj.2008.34.

West NX, Maxwell A, Hughes JA, Parker DM, Newcombe RG, Addy M. A method to measure clinical erosion: The effect of orange juice consumption on erosion of enamel. J Dent 1998; 26(4):329-35. doi: 10.1016/S0300-5712(97)00025-0.

Larsen MJ, Nyvad B. Enamel erosion by some soft drinks and orange juices relative to their pH, buffering effect and contents of calcium phosphate. Caries Res 1998; 33(1):81-7.

Lussi A, Kohler N, Zero D, Schaffner M, Megert B. A comparison of the erosive potential of different beverages in primary and permanent teeth using an in vitro model. Eur J Oral Sci 2000; 108(2):110-4. doi: 10.1034/j.1600-0722.2000.90741.x.

Wagoner SN, Marshall TA, Qian F, Wefel JS. In vitro enamel erosion associated with commercially available original-flavor and sour versions of candies. J Am Dent Assoc 2009; 140(7):906-13. doi: 10.14219/jada.archive.2009.0284.

Hamasha AA-H, Zawaideh FI, Al-Hadithy RT. Risk indicators associated with dental erosion among Jordanian schoolchildren aged 12-14 years of age. Int J Paediatr Dent 2014; 24(1):56-68. doi: 10.1111/ipd.12026.

Søvik JB, Skudutyte-Rysstad R, Tveit AB, Sandvik L, Mulic A. Sour sweets and acidic beverage consumption are risk indicators for dental erosion. Caries Res 2015; 49(3):243-50. doi: 10.1159/000371896.

Shen P, Walker GD, Yuan Y, Reynolds C, Stacey MA, Reynolds EC. Food acid content and erosive potential of sugar-free confections. Aust Dent J 2017; 62(2):215-22. doi: 10.1111/adj.12498.

Brand HS, Gambon DL, Van Dop LF, Van Liere LE, Veerman ECI. The erosive potential of jawbreakers, a type of hard candy. Int J Dent Hyg 2010; 8(4):308-12. doi: 10.1111/j.1601-5037.2010.00450.x.

McDonald JL, Stookey GK. Laboratory studies concerning the effect of acid-containing beverages on enamel dissolution and experimental dental caries. J Dent Res 1973; 52(2):211-6. doi: 10.1177/00220345730520020401.

Crossner CG. Salivary flow rate in children and adolescents. Swed Dent J 1984; 8(6):271-6.

Watanabe S, Dawes C. Salivary flow rates and salivary film thickness in five-year-old children. J Dent Res 1990; 69(5):1150-3. doi: 10.1177/00220345900690050601.

Anderson P, Hector MP, Rampersad MA. Critical pH in resting and stimulated whole saliva in groups of children and adults. Int J Paediatr Dent 2001; 11(4):266-73. doi: 10.1046/j.1365-263X.2001.00293.x.

Sønju Clasen AB, Hannig M, Skjørland K, Sønju T. Analytical and ultrastructural studies of pellicle on primary teeth. Acta Odontol Scand 1997; 55(6):339-43.


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