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Diseases of the Teeth. 71
©Uf System ; how inexplicable and irreconcilable to credibility,
must it appear that these very hard substances, with their flinty
Coatings date their destruction from completion by lateral pres-
sure against each other," Opinion's on the Causes and Ef-
fects of Diseases in the Teeth and Gums. By Charles Beio.
London, 1819.
Mr. Wooffendale, speaking of the imperfect appearances of
the teeih, (defective enamel) advances the following ridiculous
idea
" I have been at some pains, (and I believe my endeavors
have not been in vain,) to ascertain a cause for these imperfect
appearances in the teeth.
"I have frequently seen these marks, both on the first and
second sets of teeth, which cause me to supect, that such child-
ren have had the small-pox twice." Observations on the
Teeih. 1800.
M. Gerbeaux, of Paris, remarks :
"People who inhabit cold, moist, and marshy countries,
have rarely good teeth.
" It ought perhaps to be remarked, that diseased teeth,
among many individuals, originate in organic disposition,
which may be transmitted hereditarily from parents to their
children." Observations on the most frequent Diseases inciden-
tal to the Mouth, Page 14.
M. De Chemant acknowledges his ignorance of the causes
of caries, in these words
" Unfortunately all the researches that have been made on
this subject, have hitherto remained fruitless, because, in the
present state of our knowledge, we cannot foresee the disor~
ganization of the teeth, Advice to Mothers and Nurses, fyc.
Page 5.
The Chevalier Ruspini attributes caries to several causes :
"Various are the species of caries ; almost every part of the
teeth is affected by it, and both internal and external causes
produce it.
» "The caries that proceeds from internal causes, namely,
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