Building an isoscape based on tooth enamel for human provenance estimation in Brazil.

In this study, we present a correlation between δO values of carbonate in tooth enamel samples from the modern Brazilian population and the available δO data for the meteoric water from the Global Network of Isotopes in Precipitation (GNIP). Tooth enamel from 119 Brazilian individuals from five different regions of the country were analyzed. The δO isoscape obtained is in good agreement with the isoscape based on regional meteoric and drinking water.

Conformational and constitutional analysis of dental caries following radiotherapy for head and neck cancer.

Background: This study aimed to investigate the morphology and chemical composition of dental caries related to ionizing radiation (DCIR), an aggressive and progressive disease that affects dental hard tissues.

Materials And Methods: Eight human teeth with DCIR were paired with sixteen control teeth (8 teeth with conventional caries and 8 without caries) and included in this study. An analysis of the morphology of the lesions was performed using the following techniques: periapical radiography, cone beam computed tomography, computed microtomography, and scanning electron microscopy.