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Fio. G2.

Fig. 61. Dish shapes. The lower bicuspids and first molar are gold shell crowns, which were
phiced lecause of the extreme sensitiveness of the eroded areas. The crown on the first bicuspid is the
third shell crown which has been worn through by the erosion. The white cement may be seen through
tlie hole in the crown. Man, forty 3'ears of nge ; a dentist.
Fig. ij'2. Proximal surface erosion. A case of a young man, about nineteen jcars of age. When
first observed the teeth were in tire condition presented in this illustration, showing round holes through
between the teeth. These enlarged slowly, and the teeth broke away about seven years later.