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Related Experiment Video

Updated: Jan 25, 2026

Author Spotlight: Establishing an Accurate Microhardness Testing Protocol for Craniofacial Tissues

Author Spotlight: Establishing an Accurate Microhardness Testing Protocol for Craniofacial Tissues

Published on: April 26, 2024

Primary teeth microhardness and lead (Pb) levels.

Betsy Foxman¹, Ethan Kolderman^1,2, Elizabeth Salzman¹

¹Center for Molecular and Clinical Epidemiology of Infectious Diseases, Department of Epidemiology, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, Michigan, 48109, USA.

|May 4, 2019

Summary

This summary is machine-generated.

This study found no significant link between lead (Pb) levels in children's teeth and enamel microhardness. Lead exposure does not appear to decrease tooth resistance to decay.

Keywords:

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Area of Science:

Environmental Health
Pediatric Dentistry
Materials Science

Background:

Lead (Pb) exposure is a known risk factor for dental caries.
The impact of lead exposure on tooth microhardness remains largely uninvestigated.

Purpose of the Study:

To determine the association between lead concentration in deciduous teeth and enamel microhardness.
To investigate if lead exposure affects the structural integrity of children's teeth.

Main Methods:

Exfoliated primary teeth were collected from 46 children.
Enamel microhardness was measured using the Knoop method.
Lead levels were quantified using inductively coupled plasma-mass spectrometry.

Main Results:

A very low, non-statistically significant correlation was observed between lead levels and microhardness.
Lead concentration in teeth did not show a significant association with reduced microhardness.

Conclusions:

Previous high-level lead exposure was not associated with decreased tooth microhardness in this cohort.
Further research is required to elucidate the mechanisms linking lead exposure to tooth decay.