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J Dent Res 21(4): 413-420, 1942
© 1942 International and American Associations for Dental Research
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DENTAL STUDIES OF TRIPLETS

II. ARCH FORM AND PATTERN

J. T. COHEN D.D.S., C. P. OLIVER Ph.D., and S. BERNICK

1. Tracings to show the patterns of the dental arches were drawn for the members of 9 sets of triplets and 3 sets of non-related individuals. 2. Five of the triplet sets had each 1 pair of identical twins, only 2 of the 5 pairs of identical twins showed identical arch patterns. The arches of the identical pairs in the other 3 sets were relatively similar in general shape and size, but they varied in pattern; however, for the most part they had arch patterns that were more alike than the patterns of the fraternal twins and non-related individuals. 3. The extrinsic factors which have caused the development of temporary or permanent differences between the arches of twins are discussed. 4. In the sets studied, the identical twins differed more in their dental measurements than they did in arch patterns. It is concluded that of the 2 methods of study, the use of arch patterns will be the more reliable in the determination of monovular origin.

Submitted on November 12, 1942






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