In vitro enamel thickness measurements with ultrasound.

In the work described here, agreement between ultrasound and histologic measurements of enamel thickness in vitro was investigated. Fifteen extracted human premolars were sectioned coronally to produce 30 sections. The enamel thickness of each specimen was measured with a 15-MHz hand-held ultrasound probe and verified with histology.

In vivo reproducibility study of ultrasound for monitoring enamel thickness.

Objective: This work assesses ultrasound's reproducibility for monitoring enamel thickness in vivo.

Study Design: This clinical reproducibility study recruited 30 healthy consenting volunteers. The enamel thickness on an intact maxillary central incisor was evaluated at 3 sites on 3 separate visits, 1 week apart.