Ultrastructural and microbiological analysis of the dentin layers affected by caries lesions in primary molars treated by minimal intervention - Wambier, Denise Stadler; Santos, Fábio André dos; Guedes-Pinto, Antônio Carlos; Jaeger, Ruy Gastaldoni; Simionato, Maria Regina Lorenzetti (Pediatric Dentistry, 2007)