Page 45 - My FlipBook

DRAWINGS 13

irregularly square or trapezoidal. If the bases of a pyramid
and a trapezoid are placed together, as in Fig. 7, the diagram
may be made within.
2. Outline the mesial or distal surface of the crown and

root of J_ three times enlarged, showing curvature of cervical

/\
V
/
I *
I

Fig. 7.—Right upper central in- FiG. 8.—Upper central
cisor. Labial surface. A, labial incisor. Mesial surface.
grooves; B, curvature of cervical line; A, Cervical line.
C, mesio and disto-incisal angles.

line (gingival line of Black). The proximal surfaces of the
crown are wedge shape. Draw a pyramid and a wedge

placed base to base. Fig. 8, and outline the tooth within.
Note.—All of the illustrations in this section are about three diameters with
the exception of figures 17, 18, 22, 23, 24, 29, 30, 31, 32, 35.