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NOMENCLATURE. /
An occlusal wall,
A distal wall,
A gingival wall,
And —
A fifth wall, called the axial wall.
Rule: That ivall of a cavity in an axial surface of a tooth
that covers the pulp is called the axial ivall. If the pulp of the
toolh is removed, the cavity is extended to include the pulp
chamber, the wall takes the name of the ivall of the pulp chaml)er.
Simple mesial oi" distal cavities (proximal cavities), in the
bicuspids and molars, have —
A lingual wall,
A buccal wall,
A gingival wall.
An occlusal wall,
And —
An axial wall.
But mesial and distal cavities, as iisually prepared in bicus-
pids and molars, become mesio-occlusal or disto-occlusal cavities
(complex cavities) ; the occlusal wall is missing and a step is
cut in the occlusal surface.
Eule: When one of the surrounding ivalls of a cavity is
missing by reason of extension of decay, or by extension by
cutting in the preparation for filling, so as to involve another
surface of the tooth, a complex cavity is formed and the remain-
ing walls extend to the neiv surface involved. A complex cavity
is named by combining the names of the surfaces involved, as
mesio-occlusal cavity.
Therefore, when a mesial or a distal cavity in a bicuspid
or molar has involved the occlusal surface, the buccal and the
lingual walls will terminate at the occlusal enamel margin. The
axial wall will also extend to the occlusal enamel margin if no
step has been formed, and the occlusal wall will be missing.
When a step has been formed, its walls will be named as in a
simple occlusal cavity, except that that wall toward the cavity
from which the step is formed will be missing.
Therefore, mesio-occlusal (or disto-occlusal) cavities. Fig-
ure 3 (see also Figures 6, 7), in the bicuspids and molars have —
In the proximal portion
A gingival wall, g. w.
A buccal wall, b. w.
A lingual wall, l. w.
NOMENCLATURE. /
An occlusal wall,
A distal wall,
A gingival wall,
And —
A fifth wall, called the axial wall.
Rule: That ivall of a cavity in an axial surface of a tooth
that covers the pulp is called the axial ivall. If the pulp of the
toolh is removed, the cavity is extended to include the pulp
chamber, the wall takes the name of the ivall of the pulp chaml)er.
Simple mesial oi" distal cavities (proximal cavities), in the
bicuspids and molars, have —
A lingual wall,
A buccal wall,
A gingival wall.
An occlusal wall,
And —
An axial wall.
But mesial and distal cavities, as iisually prepared in bicus-
pids and molars, become mesio-occlusal or disto-occlusal cavities
(complex cavities) ; the occlusal wall is missing and a step is
cut in the occlusal surface.
Eule: When one of the surrounding ivalls of a cavity is
missing by reason of extension of decay, or by extension by
cutting in the preparation for filling, so as to involve another
surface of the tooth, a complex cavity is formed and the remain-
ing walls extend to the neiv surface involved. A complex cavity
is named by combining the names of the surfaces involved, as
mesio-occlusal cavity.
Therefore, when a mesial or a distal cavity in a bicuspid
or molar has involved the occlusal surface, the buccal and the
lingual walls will terminate at the occlusal enamel margin. The
axial wall will also extend to the occlusal enamel margin if no
step has been formed, and the occlusal wall will be missing.
When a step has been formed, its walls will be named as in a
simple occlusal cavity, except that that wall toward the cavity
from which the step is formed will be missing.
Therefore, mesio-occlusal (or disto-occlusal) cavities. Fig-
ure 3 (see also Figures 6, 7), in the bicuspids and molars have —
In the proximal portion
A gingival wall, g. w.
A buccal wall, b. w.
A lingual wall, l. w.
