Page 739 - My FlipBook

PARTIAL ERUPTION. 737

"Truing up" is a term applied by Dr. Farrar to the process of
removing overlapping portions of teeth so that they will present a nor-
mal appearance. (See Figs. 708 and 709.)
Much discomfort may be prevented if the corundum wheel be
held as in Fig. 710, as the tooth is supported by the contiguous ones

Fig. 707.

Showing thickness of enamel (Farrar).

and less jar is felt. Fine-grained wheels should be used and the sur-
face should afterward be thoroughly polished by means of cuttlefish
disks, or with felt or wooden wheels carrying polishing powder. If
the grinding should not be carried so far as to be painful a slight sensi-
tiveness may be felt for a few days, when the operation may be resumed.
Cataphoresis has been successfully applied by the writer for allaying
sensitiveness. If a tooth needs to be reduced considerably in length

Fig. 708.

Truing up (Farrar).

the dentin may be exposed on the cutting edge with impunity, as it
is kept free from decay by the tongue and lips. The enamel may be
beveled on one or both surfaces to reduce the thickness of the cutting
edge.
Approximal Surfaces.—In rare instances the removal of a slight
amount of enamel from approximal surfaces of incisors or canines is
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