Odontometrics
Definition
The quantitative measurement of teeth, covering crown diameters, root lengths, and cusp dimensions. In forensic practice these measurements feed discriminant function analyses that estimate biological sex from the overall size profile of the dentition.
- Field
- Forensic odontology, sex estimation
- Measures
- Crown diameters, root lengths, cusp dimensions
- Application
- Discriminant function analysis for biological sex
- Basis
- Overall size profile of the dentition
Common questions
Which teeth are generally most useful for odontometric sex estimation?+
Canines are widely reported as showing the strongest sexual dimorphism in size among the permanent teeth, making mandibular and maxillary canine measurements a common focus in discriminant function studies, though molars and combinations of multiple teeth improve accuracy further.
Why do odontometric discriminant functions need to be population-specific?+
Tooth size varies by ancestry and population, so a discriminant function built from measurements in one population can misclassify sex when applied to a different population without recalibration, which is a recognised limitation researchers address by publishing population-specific formulae.
How accurate is odontometric sex estimation compared to pelvic sex estimation?+
Odontometric methods generally report lower accuracy than pelvic morphology, often in the 75 to 90 percent range depending on the population and teeth used, making dental measurements most valuable when pelvic remains are absent or when used to corroborate other skeletal indicators.
Related terms
- Amelogenin
- A gene on both the X and Y chromosomes used for sex determination in forensic STR kits. The X-allele amplicon is approximately...
- Barr Body
- A condensed, transcriptionally inactive X chromosome visible in the interphase nuclei of XX individuals. In dental cells it appears as a small...
- Discriminant Function Analysis (DFA)
- A multivariate statistical method that builds a weighted linear equation from measurements to classify specimens into groups (here, male or female). A...
- Mandibular Canine Index (MCI)
- The ratio of mandibular canine mesiodistal crown width to intercanine distance, multiplied by 100. Values above a population-specific threshold lean male. Described...
- Sexual Dimorphism
- Systematic physical differences between biological males and females of a species. In teeth it is expressed mainly as size: males average larger...