Bucco-lingual dimension of teeth - An aid in sex determination


R Prathibha Rani
V Mahima
Karthikeya Patil


Background: Bucco-lingual (B-L) dimensions of permanent teeth are known to exhibit sexual dimorphism. Objectives: Sexual dimorphism of B-L dimensions is known to be population specific. This study involves the measurement of B-L dimensions of all teeth except third molars of 99 native residents of Mysore district, Karnataka in the age group of 19-30 years. Materials and Methods: The B-L dimensional measurements of 28 teeth, except third molars, of 50 males and 49 females in the age group of 19 to 30 years were made on the study casts using vernier calipers with a resolution of 0.02 mm. The distance between the highest points on the buccal / labial and lingual / palatal surfaces were measured and analyzed using discriminant function analysis. Results: Males showed greater B-L dimensions of teeth in comparison to females with eight maxillary teeth exhibiting statistically significant dimorphism. However, discriminant function analysis showed an overall accuracy of classification of sex of 78%, among which 11 showed maximum dimorphism with a classification accuracy of 70.7% whereas both 23 and 26 showed an accuracy of 66.7%. Conclusion: Application of B-L dimensional variability among males and females in the population of Mysore can aid in sex determination in forensic scenario as the results of this study showed moderate magnitude of dimorphism in maxillary teeth with an accuracy rate of 78%. However, it is recommended to take this odontometric trait into consideration in combination with other skeletal and/or dental traits for sex determination.


How to Cite
R Prathibha Rani, V Mahima, & Karthikeya Patil. (2009). Bucco-lingual dimension of teeth - An aid in sex determination. Journal of Forensic Dental Sciences, 1(2), 88–92. https://doi.org/10.4103/0974-2948.60380


  1. Iscan YM, Kedici SP. Sexual variation in bucco-lingual dimensions in Turkish dentition. Forensic Sci Int 2003;137:160-4.
  2. Acharya BA, Mainali S. Univariate sex dimorphism in the Nepalese dentition and the use of discriminant functions in gender assessment. Forensic Sci Inter 2007;173:47-56.
  3. Vahanwahal SP, Parekh DK. Study of lip prints as an aid to forensic methodology. J Ind Dent Assoc 2000;71:269-71.
  4. Otuyemi OD, Noar JH. A comparison of crown size dimensions of the permanent teeth in a Nigerian and British population. Eur J Ortho 1996;18:623-8.
  5. Lund H, Monstad H. Gender determination by odontometrics in a Swedish population. J Forensic Odontostomatol 1999;17:30-4.
  6. Vodanovi M, Demo Z, Njemirovskij V, Keros J, Brkic H. Odontometrics; A useful method for sex determination in an archeological skeletal population. J Archeol Sci 2007;34:905-13.
  7. Acharya BA. Sex determination potential of buccolingual and Mesio-distal tooth dimensions. J Forensic Sci 2008;53:790-2.
  8. Vito CD, Saunders SR. A discriminant function analysis of deciduous teeth to determine sex J Forensic Sci 1990;35:845-58.
  9. Kalia S. Study of permanent maxillary and mandibular canines and inter-canine arch widths among males and females. Dissertation submitted to the Rajiv Gandhi University of Health Sciences, Karnataka, Bangalore: 2006.