An introduction to dental anatomy and physiology, descriptive and applied by Hopewell-Smith Arthur 1865-1931

Author:Hopewell-Smith, Arthur, 1865-1931
Language: eng
Format: epub
Tags: Mouth, Tooth
Publisher: Philadelphia, Lea & Febiger
Published: 1913-03-25T05:00:00+00:00

mens it is distinctly grooved from above downwards, one on either side of the median ridge. The ridge terminates at the cusp of the tooth. The lower border of the surface is pointed at the cusp and runs mesially, to end in a slightly obtuse angle, and, distally, in an extremely obtuse angle.

Pig. 114 Fig. 115 Fig. 116 Fig. 117 Fig. 118 Fig. 119

Fig. 114.—The maxillary canine—Labial aspect. X l-.

Fig. 115.—The same—Lingual aspect.

Fig. 116.—The same—Mesial aspect.

Fig. 117.—The same—Labio-lingual section.

Fig. 118.—The same—Mesio-distal section.

Fig. 119.—The same—Various horizontal sections: .4, through the crown; 5, throug the crown; C, the neck; D, the root; £, near the apex.

{ii) Lingual Surface. —This is more triangular than the preceding. It is concave from side to side and from above downwards. Like the preceding, it is roughly divided into two parts, by a vertical ridge of enamel, having on either side a rounded hollow, the depth and extent of which varies very greatly in every subject. The upper and lower ends of this enamel edge terminate in prominent elevations, of which the former is the middle portion of the cingulum, the other the thickening of the cusp of the tooth itself. There is a slight elevation of the mesial and distal borders into crests.

{Hi) The Mesial Surface is flattened from before backwards, and from side to side. It is less triangular in outline than that of the first incisor, and the crown of the tooth passes almost imperceptibly into the neck and root, the junction being very nearly in a straight horizontal line.

(izO The Distal Surface is similar to the preceding, but at its lower portion, at the junction of the distal part of the lower border, a

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