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                            Library & Multimedia
 Molar Crenulation Trait Definition and Variation in Modern Human Populations
NCJ Number
              253364
Journal

*Homo-Journal of Comparative Human Biology* Volume: 69 Issue: 3 Dated: May 2018 Pages: 77-85
Author(s)
          M. A. Pilloud;
                        C. Maier;
                        G. R. Scott;
                        H.J. H. Edgar
Date Published

May 2018
Length
              9 pages
Annotation
              This study provides a formal definition of molar crenulations and data on their presence in a large sample.
Abstract
              Crenulated molars have been used extensively in biological anthropology; however, the trait has not been formally defined, nor have population frequencies been thoroughly outlined. Data were collected on maxillary and mandibular molars of modern dental material from various populations: South African, Hispanic, Japanese, American White, and American Black (n=750). Molar crenulations were defined and a rank-scale created. Statistical analyses include chi-squared, correspondence analysis, and trait correlations. Significant statistical differences were found between populations in all molars. Minimal sexual dimorphism was noted, and is most pronounced among the American Black sample. Generally, American White and Japanese samples showed lower frequencies of molar crenulations, the highest frequencies were seen in the American Black and South African samples, and the Hispanic sample was intermediate. Correspondence analysis showed that American Black samples tended towards grade 2, and South African samples were more often a grade 1. American White and Japanese samples were most often grade 0, and Hispanic samples were intermediate. Correlations were noted across the molars. Population differences exist in the presence of molar crenulations, which were likely shaped by evolution. Based on these results molar crenulations can be added to the suite of traits currently used to study population differences. (publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2016-DN-BX-0003


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Report (Study/Research)
                                Report (Grant Sponsored)
                                Program/Project Description


  
  
        
  Award
        The Combination of Cranial Morphoscopic and Dental Morphological Methods to Improve the Forensic Estimation of Ancestry
    
  
  
Date Published: May 1, 2018
    
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