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Fig. 214.

Fig. 215.

Fir,. 21(1.

Figs. 214, 215, 21 G. Management of we:ik lingual walls in lower molars.
Fig. 214. A mesio-lingiio-occlusal view of a lower molar with an occlusal decay which has
burrowed widely in the dentin and especially along a badly fissured lingual groove.
Fig. 215. The prepared cavity. A portion of the enamel of the lingual surface was found under-
mined and weakened by backward decay and was cut away. The buccal grooves were not badly
undennincd but were so sharp and deep as to require that the cutting extend to the marginal ridge.
A cavity of the depth shown would often expose the pulp in the tooth of a young person.
Fio. 216. The cavity filled, restoring the lost portion of the lingual wall.