Page 27 - My FlipBook

Fio. 3.

ria 3 lllustnilinli I't tliu limning of llii/ wulls in priixiniD-cii-i-lusul ciivlUus; a nii-sni-uc'clusal
cuvity LW liilitcnul w:ill. « w. Gingival wall. li w, l)is(:il wall. Ii w. Uncial wall.
I- w Pulpal Willi A w. Axial wall. In the text thts.' walls arc- given .separately for the proximal
Ijortion and for the ueclusal, or step portion. With this division, the buccal wall and the lingual wall
are each given twice, because these walls belong to both portions of the cavity.
Fig i Line angles of a mcsio-occlusal cavity. Sec rules for naming cavity angles. I, u.
Linguo-distal angle. L p. Linguo-pulpal angle. L a. Linguo-axial angle. L o. Linguo-gingival
angle. B D. Bucoo-distal angle. B P. Bucco-pulpal angle. B a. Bucco-axial angle. B u.
Bucco-gingival angle. A G. Axio-gingival angle. a p. Axio-pulpal angle. D v. Disto-pulpal
angle In the text the line angles are divided into the first and second sets for the proximal portion
and the first and second sets for the occlusal, or step portion; in each case the line angles which run
from the enamel margin to the pulpal wall or to the axial wall constitute the first set, and those
which form the boundaries of the pulpal wall or of the axial wall constitute the second set.
Fig. 5. Point angles of a niesio-occlusal cavity. D L p. Disto-linguo-pulpal angle. p la.
I'ulpo-lingiio-axial angle. G L a. Gingivolinguo-axial angle. D B p. Disto-bncco-pulpal angle.
! B A. Pulpo-bucco-axial angle. G b a. Gingivo-bucco-axial angle. In the text the point angles are
given separately for the proximal portion and the step portion of the cavity.