Resumo

YAMAMOTO, Eron Toshio Colauto et al. Influence of three types of drinks on the surface of human dental enamel: in vitro study. RGO, Rev. gaúch. odontol. (Online) [online]. 2013, vol.61, n.1, pp. 41-46. ISSN 1981-8637.

Objective The aim of this study was to evaluate the erosive effect of three beverages which are considered to be acidic in vitro study. Methods We used 45 third molars. The teeth were cut to obtain 90 4x4 mm enamel blocks, obtained from the buccal and lingual surfaces of each tooth. The groups were divided by type of beverage (Coca-Cola®, Coca-Cola do Brasil, Rio de Janeiro, Brazil; Coca-Cola Zero®, Coca-Cola do Brasil, Rio de Janeiro, Brazil and Gatorade uva®, Ambev, Jaguariúna, Brazil) and number of cycles (7, 15 and 30 cycles). For each cycle, the specimens were immersed in the drink for 2.5 minutes by alternating with immersion in saliva for 1 hour. Each cycle simulates one day of intake. Statistical analysis, ANOVA and Tukey 5% for profilometry showed the statistical difference between the kind of beverages and between periods. Results Coca-Cola® (Coca-Cola do Brasil, Rio de Janeiro, Brazil) (3.99±1.25) differed from other kinds of beverage. All the periods differed and the period of 30 days saw the greatest structural loss. For microhardness, the statistical analysis showed greater loss of surface hardness for the group Coca-Cola® (Coca-Cola do Brasil, Rio de Janeiro, Brazil) within 30 days (126.02 ± 30.98) SHL. Conclusion It was concluded that the soft drink Coca Cola® (Coca-Cola do Brasil, Rio de Janeiro, Brazil) had the greatest erosive effects and the higher the number of cycles the greater the influence on the process of dental erosion.

Palavras-chave : Beverages; Dental enamel; Hardness test.