A sweet tooth is likely to be full of
fillings. This is one point in the relationship of diet to oral beauty on which
researchers generally agree.
Beyond that, except for admission that
minerals and vitamins are essential to sound teeth, there is wide difference of
opinion on the proper feeding and care of bicuspids.
A few significant diet factors, however,
give promise of persuading your molars to linger longer in their sockets.
As an adult you are probably beyond the
stage where vitamins make much difference to your teeth. True, if you develop
scurvy from lack of Vitamin C your teeth will drop out, but that is largely
because of breakdown of surrounding tissue. Matters arc different with
children. Young animals deprived of Vitamin A grow teeth without any covering
of enamel. Dental enamel is the hardest substance in your body and when it
isn't present in teeth, soon the teeth aren't present either. Shortages of
Vitamin A in childhood can cause teeth to develop with thin, broken, or
misshapen enamel coats that pave the way for early decay.
Oversize servings of orange juice have
helped to prevent tooth cavities in children, since Vitamin C is essential to
the formation of dentine, the hard stuff between the enamel and pulp of the
tooth. Vitamin D is necessary too to regulate the distribution of calcium and
phosphorus out of which teeth are principally made.
Once you've grown up, however, the
mechanisms that make for tooth decay are multiple and complex. Meat-eating
animals and carnivorous humans, such as Eskimos, are relatively immune to
dental decay and it is evident that the oral decomposition of protein is
offensive only in the sense that your best friends won't tell you. Carbohydrate
appears to be the big tooth enemy.
A widely accepted theory holds that the
decomposition of carbohydrate particles (particularly when packed into the
fissures of the teeth, where decay most often begins) results in conditions
favorable to the growth of lacto-bacillus acidophilus, a sour little bacillus
that is charged with gnawing away at enamel and preparing you for the dental
bur.
This
ties in with the observation that sugar, of all foods, is the most efficient
tooth dissolver.
Persons who suck lozenges and cough drops—a
favorite habit of some cigarette smokers, to cool off the mouth between fags—or
who crunch hard candies frequently have very bad teeth. The old Scandinavian
custom of holding a sugar cube between the teeth and sipping coffee through it
also is a joy to dentists looking for steady customers. Sugar in solution
bathes the teeth with fluids that, for whatever reason, appear notably
effective in dissolving the tooth structure. The obvious moral, if you simply
can't cut down on sweets, is to choose candies that you can get to the glottis
swiftly.
Low sugar and high fat diets—the type
customarily prescribed for diabetics—have proved surprisingly effective in
holding tooth decay to a minimum. Brushing the teeth is esthetically advisable,
but "dirty" teeth often show less decay than "clean" ones.
The protective film that covers the teeth (it requires acid to dissolve it, and
is not necessarily visible to the eye) appears to prevent withdrawal of calcium
from teeth, perhaps by preventing direct contact with bacteria. Even when
bacteria are present in the mouth, a well-balanced diet goes far to render them
harmless.
One of the new discoveries in nutrition is
that some types of pyorrhea can be prevented or benefited by increase of
Vitamin C. Bleeding gums—the popularly terrifying cause of "pink
toothbrush"—often need Vitamin C more than they do vigorous scrubbing or
the gnawing of bones.
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