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94 THE TREATMENT OF TEETH
filling by working back to the approximal surface.
In cases where it is difficult or impossible to start
the filling at the cervical wall without undue or
undesirable undercutting, one may commence at the
occlusal step or undercut, and when this part is
sufficiently filled to produce stability of the gold, it
may be worked along one of the lateral walls, or
over the approximal floor, imtil the
cervical wall is reached and well
ll
covered, then the filling may be
worked back again towards the oc-
clusal surface until completed. If
desired, a starting pit can be made

at one or both of the cervical angles,
and the filling commenced with co-
hesive fifold, gradually working from
Fig. 8. Fig. 9. •,
,
i
.
one an^ie to the other, across the
cervical wall, until a firm foundation is made.
In posterior cavities the use of hand pressure and
fine points, and working by reflection in the mouth
mirror, is often a necessary proceeding.
Restoring Exact Contour iit Pdcuspids and Molars
without Previous Separaiion.—Unless the teeth have
fallen towards one another, owing to destruction of
the knuckle by extensive decay, the writer finds
that whenever the teeth are fairly regularly placed
in the arch, any previous separation of molars and