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Clinical Oral Investigations

, Volume 16, Issue 2, pp 395–399 | Cite as

Sexual dimorphism in teeth? Clinical relevance

  • Ralf J. RadlanskiEmail author
  • Herbert Renz
  • Werner Hopfenmüller
Original Article

Abstract

Many morphometric studies show a sexual dimorphism in human teeth. We wanted to know whether it is possible to determine the sex of an individual if only the anterior teeth are visible. Fifty intraoral photographs showing the front tooth region of female and male individuals (age: from 7 to 75 years) were randomly arranged in actual size on a questionnaire. The lip region was covered in each case. Besides "female" and "male", one was also able to check "?" if undecided. The questionnaires were distributed to 50 expert test persons (dentists, dental technicians, dental assistants, and students of dental medicine) and to 50 laymen and were all returned for evaluation. Although the correct sex was recognized on single photographs to a maximum of 76%, it was incorrect in 69% on other photographs. Altogether, the statistical evaluation showed that in most cases, the sex was only recognized correctly by one half, and incorrect by the other half. It can be concluded that a sexual dimorphism of human teeth—although measurable morphometrically—could not be recognized visually on the basis of photographs of the front tooth region. Neither experts in the field of dentistry nor laymen were able to properly distinguish between male and female teeth.

Keywords

Sexual dimorphism Teeth Morphometry Questionnaire 

Notes

Acknowledgments

We thank Mrs. Beate Lion for her skillful assistance in preparing and conducting this study. We further thank Ms. Marion Bonner of eubylon GmbH for checking our manuscript as a native speaker.

Conflicts of interest

The authors declare that they have no conflicts of interest.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Ralf J. Radlanski
    • 1
    Email author
  • Herbert Renz
    • 1
  • Werner Hopfenmüller
    • 2
  1. 1.Center for Dental and Craniofacial Sciences, Dept. of Craniofacial Developmental BiologyCharité - Campus Benjamin Franklin at Freie Universität BerlinBerlinGermany
  2. 2.Institute of Biometry and Clinical EpidemiologyCharité - Campus Benjamin Franklin at Freie Universität BerlinBerlinGermany

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