Sexual Dimorphism and Tooth Size Variation in the Permanent Dentition of the Uva Bintenna Veddas of Sri Lanka

Thushari Hewapathirana, Roshan Peiris, Deepthi Nanayakkara, Malkanthi Chandrasekara, Eugine Wikramanayake

Department of Anatomy, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka.
Department of Basic Sciences, Faculty of Dental Sciences, University of Peradeniya, Peradeniya, Sri Lanka.

DOI: 10.4236/aa.2014.41001                

Abstract

Forty-eight dental casts (37 males, 11 females) of Uva Bintenna Veddas were the population. Mesiodistal (MD) and buccolingual (BL) diameters were measured and analyzed for sexual dimorphism and size variation. In males, MD of maxillary canines and mandibular first molars were significantly greater at p < 0.01 and maxillary first molars and mandibular second molars at p < 0.05. Crown area was significantly greater at p < 0.01 for maxillary and mandibular first molars. Crown module was significantly greater at p < 0.01 for mandibular first molars and at p < 0.05 for maxillary first premolars, first molars and mandibular second molars. Maxillary canines, maxillary first molars and mandibular canines were the most sex ually dimorphic. First tooth of each tooth class I₁, P₁, and M₁ showed least variability in both arches and in both sexes. In males, both MD and BL showed high variability in maxillary lateral incisors and mandibular second premolars.

Keywords

Uva Bintenna Veddas; Sexual Dimorphism; Size Variation; Crown Diameters; Permanent Teeth

Conflicts of Interest

The authors declare no conflicts of interest.

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