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DRAWINGS 23
20. Draw the teeth of the upper and lower jaw in occlu-
sion, showing correct curvature of the line of occlusion, with
its lowest point at the proper location, natural size (Fig. 29).
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Fig. 27.—^Left lower first molar. Fig. 28.—Right lower second
Occlusal surface. A, Mesio-buccal tri- molar. Occlusal surface. A,
angular ridge; B, disto-buccal triangu- Mesio-lingual lobe; B, disto-lin-
lar ridge; C, distal triangular ridge; D, gual lobe; C, disto-buccal lobe;
disto-lingual triangular ridge; E, mesio- D, mesio-buccal lobe; E, mesial
lingual triangular ridge; F, mesial groove; groove; F, lingual groove; G, dis-
G, mesio-buccal groove; H, disto-buccal tal groove; H, buccal groove.
groove; 7, distal groove; /, lingual groove.
Fig. 29.—Occlusion of the teeth of the left side.
21. Make a drawing, side view, showing the proper incHna-
tion of the upper and lower anterior teeth (Fig. 30). The
