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Flu. 90. A bicuspid in which there is seen a disposition to broader spreading occhiso-gingxvally.
Sometimes this is very extpiisive, as will be illustrated later.
Fig. 91. An upper niolnr in which is seen the same disposition to spread bucco-lingiially as occurs
in the bicuspids. This form of spreading is common to the bicuspids and molars. In this case the
enamel rods have fallen out of a small area at the point of first beginning.
10a
