| Autor: |
Delson, Eric, MacPhee, Ross D.E., Conard, Nicholas, Fleagle, John G., McBrearty, Sally, Meng, Jin, Plummer, Tom, Rogers, Kristi Curry, Rose, Ken, Bailey, Shara E., Hublin, Jean-Jacques, Monge., J., Mann., A., Stout., A., RogÈr., J., Wadenya, R. |
| Zdroj: |
Dental Perspectives on Human Evolution: State of the Art Research in Dental Paleoanthropology; 2007, p263-274, 12p |
| Abstrakt: |
Reported here are the preliminary results of an ongoing study undertaken to determine if there are significant changes from the results obtained in the middle of the 20th Century in the range of variation in dental development in American children of European and African ancestry. Several thousand orthopanoramic radiographs, available from the Dental Clinics of Temple University and the University of Pennsylvania, in Philadelphia, Pennsylvania will eventually be incorporated into this study. The 170 radiographs that have thus far been analyzed document significant changes in the maturation and development of the first and second permanent lower molars. Children in this study have dentitions that are maturing earlier than those in the samples published by Moorrees et al.(1963)and (1973). If the results of this preliminary analysis are confirmed by the incorporation of additional teeth and a larger sample of children, as has been reported elsewhere, it will be necessary to reconsider the characterization of dental development in living humans. Confirmation would also require re-evaluation of the range of inherent plasticity in human dental development. These preliminary results, along with the work by zihlman et.al (2004), suggest that current concepts of what constitutes ‘‘normal'' dental development in living humans and chimpanzees may have to be reconsidered; there are also marked implications for the way in which the developing dentition in fossil hominins is characterized. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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