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From wikipedia:
The extent to which tooth decay is likely, known as cariogenicity,depends on factors such as how retentive the sugar is to the teeth.Contrary to common belief, it is not the amount of sugar ingested butthe frequency of sugar ingestion that is the most important factor in the causation of tooth decay. When the pH in the mouth initiallydecreases from the ingestion of sugars, the enamel is demineralized andleft vulnerable for about 30 minutes. Eating a greater quantity ofsugar in one sitting does not increase the time of demineralization.Similarly, eating a lesser quantity of sugar in one sitting does notdecrease the time of demineralization. Thus, eating a great quantity ofsugar at one time in the day is less detrimental than is a very smallquantity ingested in many intervals throughout the day. For example, interms of oral health, it is better to eat a very large dessert at dinnertime than to snack on a single, small bag of candy throughout the entire workday.
The extent to which tooth decay is likely, known as cariogenicity,depends on factors such as how retentive the sugar is to the teeth.Contrary to common belief, it is not the amount of sugar ingested butthe frequency of sugar ingestion that is the most important factor in the causation of tooth decay. When the pH in the mouth initiallydecreases from the ingestion of sugars, the enamel is demineralized andleft vulnerable for about 30 minutes. Eating a greater quantity ofsugar in one sitting does not increase the time of demineralization.Similarly, eating a lesser quantity of sugar in one sitting does notdecrease the time of demineralization. Thus, eating a great quantity ofsugar at one time in the day is less detrimental than is a very smallquantity ingested in many intervals throughout the day. For example, interms of oral health, it is better to eat a very large dessert at dinnertime than to snack on a single, small bag of candy throughout the entire workday.
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