Erosive Effect of Soft Drinks on Permanent Human Enamel Surface: an in Vitro Study
| Autor: | Yueh-Chiao Chuang, 莊岳樵 |
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| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 Objectives Most soft drinks are acidic in nature and exposure to these drinks may result in enamel erosion. The aim of this study was to compare the erosive potential of different soft drinks in the laboratory. Materials and methods Four commercially available soft drinks in Taiwan were included. The erosive potential of each product was assessed by measuring its initial pH, titratable acidity, calcium, phosphate and fluoride content. Forty human permanent enamel samples were immersed in 100ml of the drinks for 20min, 1h and 3h. Erosive surface images and enamel loss in vitro were acquired after exposure by laser confocal scanning microscope. Results The initial pH of the soft drinks ranged from 2.42 to 3.46 with their titratable acidity ranging from 13.88 to 35.95 ml of 0.1 M NaOH. The ion concentration of the beverages ranged between 5.69 and 75.94 ppm for calcium, between 2.88 and 522.47 ppm for phosphate, and between 0.10 and 0.18 for fluoride. The amount of enamel loss following 3h immersion in the drinks ranges from 7.28 to 34.07 μm. Conclusion All of the soft drinks were found to be erosive. Drinks of high calcium and phosphate content may have a significant lower erosive potential. Drinks of low pH and high titratable acidity may have a higher erosive potential. The erosive potential should be predicted based on the type of acids, initial pH, titratable acidity and ion concentration. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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