Treatment of malocclusion of the teeth : Angle's system.

  • Angle, Edward H. (Edward Hartley), 1855-1930.
Date:
1907
Catalogue details

Licence: In copyright

Credit: Treatment of malocclusion of the teeth : Angle's system. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    buccal and lingual cusps of the uppers, and the lingual cusps of the upper molars and premolars rest between the buccal and lingual cusps of the lowers, as in Fig. 3. The grinding surfaces are thus enormously increased in extent and efficiency over what would be possible if they consisted of a single row of cusps or of plane surfaces. But increase of masticating surface is not the only reason for this complex interdigitation of the cusps and inclined planes of the teeth, but it is of equal importance Fig. 3. Normal occlusion of molars, transverse view. (Cryer.) in providing for the teeth a mutual support. The sizes, forms, interdigitating surfaces, and positions of the teeth in the arches are such as to give to one another singly and collectively, the greatest possible support in all directions. This is the pattern, the form, the type of the normal in occlusion,—the normal denture. In building the human denture, Nature has worked toward a definite end to produce the most efl^cient parts with the most efficient arrangement of these parts that they may in function be most efficient. Each tooth is not only in harmonious relation with every other tooth, but helps to maintain every other tooth in these harmonious rela-