Caries lesion transition patterns of schoolchildren in a fluoridated community in Brazil.

Objective: To describe the caries lesion transition pattern in permanent tooth surfaces over 2 years among a convenience sample of children in a fluoridated (0.8 ppm F) low-socioeconomic community of Brazil.

Material And Methods: One hundred forty-nine schoolchildren (7-12 years) were examined for caries using Nyvad criteria at baseline and after 2 years.

Reliability and validity of a new classification of MIH based on severity.

Objectives: To describe a new molar-incisor hypomineralization (MIH) severity scoring system (MIH-SSS) that focuses on the defects' severity and to assess the system's validity and reliability over 3 years.

Materials And Methods: One hundred eighty-one children diagnosed with MIH were examined by MIH-SSS. For reliability assessment, 15-20 children were examined twice, and analyses were performed at the tooth level at four different cutoff points.