Page 44 - My FlipBook

1
12 DENTAL ANATOMY

LOWER TEETH

Table of
measurements
of the teeth Mesio- Mesio- Labio- Curvature
Length Length Length
of man, given distal distal or bucco- of the
over of of
in millimeters diam. diam. lingual gingival
all. crown. root.
and tenths of of crown. of neck. diam. line.
millimeters.
LOWER TEETH

Central Incisor. 20. 7 8.8 II. 8 5-4 3-5 • 6.0 2.5
1
Average.

Lateral Incisor. 21 . 9.6 12.7 5-9 3-8 6.4 2.5
Average.

Cuspid. Average. 25.6 10.3 153 6.9 5-2 7.9 2.9

First Bicuspid. 21.6 7.8 14.0 6.9 4-7 7-7 0.8
Average.

Second Bicuspid. 22.3 7-9 14.4 71 4-8 8.0 , 0.6
Average.

First Molar. 21 .0 7-7 13.2 II . 2 8.5 10.3 r. I
Average.

Second Molar. 19.8 6.9 12 .9 10.7 8.1 10. I ; 0.2
Average.

Third Molar. 18.5 6.7 II. 8 10.7 8.3 9.8 0.2
Average.

Drawings

I. Outline the labial surface of the crown and root of
1 three times enlarged, according to Black's measurements,
I
showing labial grooves, curvature of cervical line (gingival

line of Black), shape of mesio- and disto-incisal angles. The
root is conical in shape and the labial surface of the crown
Note.—The original drawings for the illustrations in this section were made
by Doctor W. G. Pieck, Cincinnati, O.