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Flii. lis. Fio. 119.
Figs. 118, no. niagraniiiKitic represeiilation of the .nrea.s of liability to caries on the proximil
surfaces of the bicuspids and molars. Figure 118, and on the buccal surfaces of the bicuspids and
molars, bigure 110. The arcliing of the free bolder of the guni tissue as it passes between the
teeth IS illustrated in Figure lis. The form of this areli varies greativ in ditTerent cases In
many, and particularly in young persons, the summit of the arch is neaiiv flat for a more or less
considerable space.
