Page 117 - My FlipBook

THE USE OF SCREWS.
103
the cavities above and below, cutting a groove across the incisive
and another near the The
edge, gum at the labial aspect. cavity pre-
pared for filling is shown in Fig. 104, and the full contour in Fig.
105.
Case 6. A young girl of about fourteen presented with a lower
sixth-year molar, from which all of the crown was absent, the pulps,
however, being still alive. . These cases are by no means uncommon.
Of course, where the patients can afford it, they may be crowned with
gold, but even then it is doubtful whether such an operation would
for two
be as serviceable as the one which I am about to describe,
reasons : First, the fact that by the method of filling the dam is in
position when the cement is used ; and, secondly, a better occlusion

FIG. 103. FIG. 104. FIG. 105. FIG. 106. FIG. 107.

' ' ' '
can be obtained where the bite t's short. I made a band of to
gold
fit around the tooth, wide enough so that when in place it prevented
closure of the It was then removed, and the turned
jaws. upper edge
inward slightly all around. Replaced about the tooth, closure of the
jaws pressed the bent edges down until the occlusion was perfect. The
tooth with band thus turned in to adapt itself to the occlusion is
shown in 106. The dam was next and cement placed
Fig. adjusted,
along the inner side of the band and covering the floor of the cavity
thus formed. Before this was allowed to
FIG. 109.
set, amalgam was used to complete the con-
tour. This cement not only served to se-
cure the superstructure to the root, but it
protected the gold band from the action
of the mercury in the amalgam. When
trimmed up and polished, a handsome and
serviceable crown resulted, as shown in Fig.
107.
Case 7. A young woman presented with
a first from which the entire labial
bicuspid
portion had been lost. The tooth was pulp-
less. I ground a porcelain cuspid to fit fairly well into the place of the
missing labial wall, and to this, when backed, soldered a stout platinum
bar, which extended down into the root. This was set with oxyphos-