On extraction, with notes on the anatomy and physiology, of the teeth, for medical students . bicuspids), or they may havecurved roots (as in the lower molars), or they may bein part straight and in part curved (as in the uppermolars). The surfaces of the crowns of the teeth are namedaccording to the relative position they bear to oneanother, to the cheek, to the lips and tongue, and tothe middle line—viz., occluding or grinding surface,buccal surface, labial surface, lingual surface, mesialsurface, distal surface. Incisors—The Upper Central Incisors (Fig. 26).—These are the largest of this gr
On extraction, with notes on the anatomy and physiology, of the teeth, for medical students . bicuspids), or they may havecurved roots (as in the lower molars), or they may bein part straight and in part curved (as in the uppermolars). The surfaces of the crowns of the teeth are namedaccording to the relative position they bear to oneanother, to the cheek, to the lips and tongue, and tothe middle line—viz., occluding or grinding surface,buccal surface, labial surface, lingual surface, mesialsurface, distal surface. Incisors—The Upper Central Incisors (Fig. 26).—These are the largest of this group, the labial surfacebeing convex and the lingual surface concave ; themesial surface is larger than the distal, and its junctionwith the cutting edge is at an acute angle, while the distal 44 DENTAL ANATOMY surface forms an obtuse angle with it. The enamel inits labial and lingual surfaces terminates in a crescenticform, with the arch facing upwards towards the gum, andon the mesial and distal surface in a V-shape, having theapex of the V looking downward away from the gum. .-fl. r a
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Keywords: ., bookcentury1800, bookdecade1890, bookidonextraction, bookyear1896
