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

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.