TY - JOUR T1 - The effect of pH on the erosive potential of Iranian and imported soft drinks using atomic absorption spectrophotometry TT - بررسی نقش pH نوشابه‌های ایرانی و خارجی بر میزان اروژن دندانها به روش آنالیز یون کلسیم JF - JIDA JO - JIDA VL - 18 IS - 4 UR - http://jida.ir/article-1-330-en.html Y1 - 2006 SP - 27 EP - 33 KW - pH - Fizzy drinks – Erosion - Enamel N2 - The effect of pH on the erosive potential of Iranian and imported soft drinks using atomic absorption spectrophotometry Dr. M. Fallahinejad Ghajari* - Dr. S. Nabavi Razavi** *- Associate Professor of Pediatric Dentistry Dept. Faculty of Dentistry – Shaheed Beheshti University of Medical Sciences. **- Peadodontist. Abstract Background and Aim: An increase in pH can affect the erosive potential of soft drinks, but the possible role of calcium salts and phosphate has not been fully recognized. The aim of the present investigation was to evaluate the effect of pH on the erosive potential of soft drinks on permanent tooth enamel. Materials and Methods: This experimental in vitro study was performed on 8 beverages and 240 intact premolars extracted for orthodontic purposes. Two Iranian soft drinks (Cola and Orange Zamzam) and 2 imported ones (Pepsi and Mirinda) constituted the case group and 4 solutions with the same pH served as the control group. The teeth were divided into 3 groups (A, B and C) and further subdivided into 8 subgroups and immersed in 20 ml of one of the 8 beverages for 15 minutes (A), 45 minutes (B) and 12 hours (C). The amount of Ca++ released in each soft drink or solution was estimated by AA-spectrophotometry at the end of each exposure time. Results: A statistically significant difference was found in the extent of erosion between the case and control groups which increased with exposure time (P M3 ER -