PrepTest 72, Section 3, Question 1
Dentist: I recommend brushing one's teeth after every meal to remove sugars that facilitate the growth of certain bacteria; these bacteria produce acid that dissolves minerals in tooth enamel, resulting in cavities. And when brushing is not practical, I recommend chewing gum�even gum that contains sugar�to prevent the formation of cavities.
Dentist: I recommend brushing one's teeth after every meal to remove sugars that facilitate the growth of certain bacteria; these bacteria produce acid that dissolves minerals in tooth enamel, resulting in cavities. And when brushing is not practical, I recommend chewing gum�even gum that contains sugar�to prevent the formation of cavities.
Dentist: I recommend brushing one's teeth after every meal to remove sugars that facilitate the growth of certain bacteria; these bacteria produce acid that dissolves minerals in tooth enamel, resulting in cavities. And when brushing is not practical, I recommend chewing gum�even gum that contains sugar�to prevent the formation of cavities.
Dentist: I recommend brushing one's teeth after every meal to remove sugars that facilitate the growth of certain bacteria; these bacteria produce acid that dissolves minerals in tooth enamel, resulting in cavities. And when brushing is not practical, I recommend chewing gum�even gum that contains sugar�to prevent the formation of cavities.
Which one of the following, if true, would most help to reconcile the dentist's apparently paradoxical recommendations?
A piece of chewing gum that contains sugar contains far less sugar than does the average meal.
Tooth decay can be stopped and reversed if it is caught before a cavity develops.
Chewing gum stimulates the production of saliva, which reduces acidity in the mouth and helps remineralize tooth enamel.
Sugars can be on teeth for as long as 24 hours before the teeth-damaging bacteria whose growth they facilitate begin to proliferate.
Chewing gum exercises and relaxes the jaw muscles and so contributes to the overall health of the oral tract.
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