evaluation of ph and t.a of some of the iranian carbonated soft drinks (2003)

background & aim: erosion has been defined as the irreversible loss of dental hard tissue by a chemical process not involving bacteria. dental erosion is an important cause of tooth tissue loss in both children and adults. acids of intrinsic and extrinsic origin (gastric juice and acidic foodstaffs, beverages) are thought to be the main etiologic factors for dental erosion. the reported incidence of tooth erosion caused by soft drinks has been increasingly documented because soft drinks consumption has increased dramatically over two decades. the aim of this study was to evaluate the ph and ta of some of the iranian carbonated soft drinks. methods and materials: an experimental lab study was designed in kerman for controlling ph and titratable acidity (ta) of iranian carbonated drinks cola, orange and lemon lime. twenty - three kinds of drink were collected from three different groups (cola, orange, lemon lime) and their ph and ta were assessed 10 days, 2 months and 4 months after their production. data were analyzed with spss, paired t test and anova. results: analysis of data showed ph of soft drinks was 2.5-3. ph of cola drinks was less than other drinks (p<0.05). ta of orange drinks was more than other drinks but there wasn’t any significant different between groups of drinks. ta of soft drinks was 0.11-0.14. conclusion: chemical tests indicate that all soft drinks in this study have approximately suitable ph & ta.j dent sch 2006 24(3): 6