Objectives: A 2007 survey of Australian school children found that 68% showed signs of dental erosion. The objective of this study was to evaluate the erosive potential of different sports drinks, including those claiming to have a reduced erosive potential, and compare them with their chemical composition. Methods: 70 blocks of human enamel were embedded in epoxy resin and randomly divided into groups of seven. Ten drinks were purchased for analysis: 1. Mt Franklin water (-ve control); 2. Coca-cola (+ve control); 3. Gatorade powder; 4. Gatorade liquid; 5. Powerade powder; 6. Powerade liquid; 7. Staminade; 8. Sukkie Lemon; 9. Sukkie Berry; and 10. Endura. Sports drink powders were diluted in distilled deionised water according to manufacturer instructions. The pH and titratable acidity of each drink was determined. Each enamel block was exposed to 50mL of their respective drink for 30 mins (25oC, agitation at 120rpm). The surface loss produced by each drink was determined by non-contact white-light profilometry and surface softening determined by change in Knoop surface microhardness. Results: The pH of drinks 3-7 ranged from 2.81-3.55 whereas drinks 8-10 ranged from 4.85-4.93. The positive and negative control had the greatest and least surface loss and change in surface microhardness respectively. Surface loss produced by the sports drinks ranged from 2.55µm (7) to undetectable levels (<0.1µm, 8-10). Surface softening produced by the sports drinks ranged from -188 (4) to -23 (9). Drinks 8-10 had a similar softening effect to 1. The pH of the beverages was found to correlate strongly with their erosive potential (p<0.01). Conclusion: Sukkie and Endura had a low erosive potential, while all other sports drinks produced significant amounts of surface softening and surface loss. The in vitro erosive potential of sports drinks correlated strongly with their pH. Acknowledgement: The support of the ADRF is gratefully acknowledged.
Division: Australian/New Zealand Division Meeting
Meeting:2011 Australian/New Zealand Division Meeting (Melbourne, Australia) Location: Melbourne, Australia
Year: 2011 Final Presentation ID: Abstract Category|Abstract Category(s):Scientific Groups
Authors
Shen, Peiyan
( The University of Melbourne, Carlton, N/A, Australia
)
Cochrane, Nathan J.
( The University of Melbourne, Carlton, N/A, Australia
)
Yuan, Y.
( The University of Melbourne, Carlton, N/A, Australia
)
Walker, G.
( The University of Melbourne, Carlton, N/A, Australia
)
Chang, Cheney H.
( The University of Melbourne, Carlton, N/A, Australia
)
Reynolds, C.
( The University of Melbourne, Carlton, N/A, Australia
)
Reynolds, Ec
( The University of Melbourne, Carlton, N/A, Australia
)