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THE DECAY OF THE TEETH. 145 ;
Some also accuse sugar or strongly sugared beverages. Ovel-
griiu '-' (1771). Ffaff"^ (1756), directed attention to the bad teeth
of confectioners, while Peter Forest''- (1597) pointed out the
occurreuce of a similar malady in the case of apothecaries, " who
ruin their teeth with licking the juices."
AVestcott holds that sugar is injurious only on account of its
fermentation products, viz, lactic and butyric aciils. At present,
sugar is universally regarded by dentists as Avell as laymen as
injurious to the teeth. Many investigators, as Fauchard (1728),
Angermann (1806), Guttraann (1827), Desirabodc'- (1846), etc.,
distinguish external and internal or local and general causes.
Fauchard also mentions different forms of decay, such as scrofu-
lous, scorbutic, moist, dry, supertieial, deep, etc.
As external causes, were mentioned mechanical, chemical, etc.
as internal, bad juices, deformities, constitutional diseases, etc.
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