Aim: If a relation exists between salivary I, buffer capacity and caries experience, then this relationship could be used as screening chair side test for caries risk assessment.
Study Design: One hundred ninety seven children aged 4 to 6 years were examined. Data was collected by interview and clinical examination. They were divided into low, moderate and high caries experience group of 20 children each. Two ml of each sample was used to measure the pH value with pH meter. Regarding the buffering capacity, freshly prepared hydrochloric acid (HCl) was titrated into saliva and pH was recorded. The collected saliva samples were sent to Laboratory for measurement of calcium and phosphorus. I was calculated and the negative logarithms of I were used to determine the enamel solubility. The correlation between salivary I, buffering capacity and caries experience were evaluated.
Results: There was a significant relation between pH, log I and dental caries experience, it could be considered as a predictor of dental caries.
Conclusion: pH measurement after HCl titration in saliva could be used as chair side screening test for the assessment of caries risk.
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