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MECHANICAL FIXATION —
21
The rubber-dam should be pressed on the moist teeth.
Thus holes can be punched at correct distances, a
point which is of value in case there are gaps in
a row.
- The rubber-dam is removed by cutting it across.
When either a dead or a painful tooth has to be
removed, place it on the plaster model, drill through it
at the same height as the other teeth, and make the
retaining-wall as though there were no tooth missing
that is to say, a cross-pin is soldered to it for the
missing tooth also.
The retaining appliance introduced into the mouth,
cleanse the tooth—as described above—and after
resection is performed, place it on the retaining ap-
pliance so that the root has to extend into the open
wound.
Like the other teeth, it is retained by a split pin
(Fig. 18).
