Odontometrical method useful in determining gender and dental alignment

Area of Science:

• Forensic Anthropology
• Odontology
• Anthropology

Background:

• The mandibular canine index (MCI) is a metric used in sex determination.
• Previous studies, like Rao et al.'s, reported satisfactory results using MCI.
• However, the influence of dental occlusion and tooth alignment on MCI accuracy was not previously addressed.

Purpose of the Study:

• To evaluate the effectiveness of Rao et al.'s sex determination method using the mandibular canine index (MCI).
• To assess the impact of tooth alignment on the reliability of MCI for sex determination.
• To compare calculated MCI values with standard MCI, considering dental alignment.

Main Methods:

• A sample of 210 girls and 214 boys from the University of Nice-Sophia Antipolis was randomly selected.
• Tooth sizes and dental arch dimensions were measured using a vernier caliper.
• The mandibular canine index (MCI) was calculated for both sexes and compared to standard MCI, factoring in tooth alignment.

Main Results:

• Rao et al.'s method for sex determination using MCI is effective only when lower anterior teeth exhibit correct alignment.
• The accuracy of MCI is dependent on the dental alignment of the individual.
• Standard MCI values specific to the local population must be utilized for reliable results.

Conclusions:

• The mandibular canine index (MCI) method for sex determination is contingent upon proper lower anterior dental alignment.
• Accurate sex determination using MCI necessitates consideration of tooth alignment and the use of local population standards.
• Forensic anthropologists should verify dental alignment before applying MCI for sex determination.