| http://www.w3.org/ns/prov#value | - Depending upon the type of food, the pH value of the saliva, and therefore, that on tooth surfaces can drop to pH values 5.5 to 4.5, and in some situations, for example after ingestion of candies or other sweets, even lower pH values may prevail. pH values below 5.5 are generally considered undesirable because such strongly acidic conditions can bring about the result that the calcium compounds of
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