Detecting menarcheal status through dental mineralization stages?

Area of Science:

• Bioarchaeology
• Human Growth and Development
• Forensic Anthropology

Background:

• Menarche signifies the start of reproductive lifespan and is crucial for studying human growth and health.
• Estimating menarcheal status from skeletal remains is challenging due to poor preservation of non-dental elements.
• Dental development offers a potential alternative for determining past reproductive history.

Purpose of the Study:

• To investigate the correlation between permanent tooth mineralization and menarcheal status.
• To assess the predictive accuracy of dental development for estimating menarche in living individuals.
• To explore the utility of dental mineralization as a proxy for reproductive lifespan in bioarchaeological contexts.

Main Methods:

• Radiographic analysis of 167 sets of developing permanent teeth from 73 French females with known menarcheal status.
• Assessment of dental mineralization using Demirjian and Moorrees standards.
• Statistical analyses including correlation ratios, Generalized Linear Mixed Models (GLMM), and Classification and Regression Trees (CART).

Main Results:

• A significant correlation was found between menarcheal status and the mineralization of premolars.
• Menarcheal status was predicted with 92% accuracy in the learning sample and 77% in the validation sample.
• The findings suggest that premolar development is a reliable indicator of menarche in the studied population.

Conclusions:

• Dental mineralization, particularly of premolars, shows strong potential for predicting menarcheal status.
• This method could provide valuable insights into reproductive history in bioarchaeological research.
• Further research across diverse populations is necessary to validate and generalize these findings.