Resumo

NUNEZ, P; OLATE, S; SANHUEZA, A  e  NUNEZ, G. Fluor loss in permanent teeth exposed to beverages: Comparative study in vitro. Av Odontoestomatol [online]. 2006, vol.22, n.2, pp.141-146. ISSN 2340-3152.

Introduction: The exposure of soft drinks and fruit juices is constantly increasing and the main caracteristic of these beverages is the high acidity. This alteration of oral balance causes a more frequent loss of dental minerals. Our main objective was to identify the quantity loss of fluor of a tooth and compare this effect caused by two different kinds of soft drinks. Methodology: 30 bicuspids were put in two different groups, 15 in each, extracted by ortodontics indication The tooth did not have evidence of clinical pathology. The experiment consisted in applying an ionic buffer, and later put the results in a calibration curve. So with a pH-Meter (Orion, model 920 a) the pH value was obtained. Then the tooth was submerged for 30 minutes in the soft drink and with the electrode the result of the presente quantity of fluor was obtained. The statistic T-test for independent proof where done. Results: more and more research confirm the impact of the acid in the mouth and its role in dental erosion. In our research the pH value of the orange drink was 3.1 and the value for the coke drink was 2.5. Otherwise it shows a statistic difference of the loss of fluor by the different drinks (p<0.0001). Conclusion: An important loss of fluor occurs in the tooth when it gets in contact with an acid drink, as it also occurs a significant difference in the effect of acid drinks with a variation of 0.6 pH.

Palavras-chave : Enamel erosion; fluor loss; soft drinks.

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