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Journal of Dental Research, Vol 58, 554-559, Copyright © 1979 by International & American Associations for Dental Research Online Journals

ARTICLES

Crown size-arch space relationships during human prenatal dental development

S. M. Garn, A. R. Burdi, W. J. Babler and R. Asp

As shown in composite reconstructions made from optically-projected measurements of 10mu frontal maxillofacial sections of 20 histologically normal fetuses and embryos in the 70-255 mm CRL range, individual differences in relative tooth size and interdental spacing are evident by 10.5-11 weeks of gestation, and age-corrected crown-size correlations (r=0.40) approximate those in postnatal life. Despite an eight-fold increase in crown dimensions, interdental spacing remains approximately constant after 150 mm CRL, suggesting that the tooth organs or the periodontal membranes are able to maintain spacing, into the third trimester.




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