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PARTIAL ERUPTION. 735

upper left canine erupting behind the lateral incisor while the deciduous
canine was still in place. The cusp had penetrated the gum abuut a
Fig. 700.

Forcible eruption of canine.
year before, but had din*ing that time made no progress in eruption.
The writer decided to cause the tooth to erupt forcibly, by means of a
coiled spring as suggested by Dr. Talbot. As the deciduous canine was
large and firm and but slightly decayed, it was thought best to let it
remain in place till the permanent tooth was erupted far enough to see
if it were well formed. By depressing the gum slightly a hole was

-liuwiug result of uperutiuu.
drilled in the enamel in the lingual surface of the tooth. In this hole
was inserted one end of a coiled spring, which was attached to a plate,
as shown in Fig. 700, which shows the cusp emerging from the gum.
The tooth was soon eruj)tcd to its normal length, when the deciduous