Though in the begining smoking may increase the flow rate of parotid gland in the long term there appears to be no difference between smokers and non-smokers.During smoking pH of saliva rises but over a longer time period smokers may or may not show a lower pH in stimulated whole saliva. Buffer capacity may be lower in some smokers.
The concentration of thiocyanate, a product present in tobacco smoke and in normal saliva (high thiocyanate concentrations in saliva predicts less caries) is increased in saliva of smokers.
