Resumo (EN)
The molar-incisor hypomineralization (MIH) is a condition that achieves one to four first permanent molars and maybe it is associated to permanent incisors. This change weakens the enamel so that it is possible fractures occur immediately after eruption, causing a tooth sensitivity and a greater risk of developing cavities, both arising from exposure of dentin. This clinical case presents the diagnosis and treatment of a patient who complained of multiple teeth staining, but with no pain, she thought it was tooth decay. The history and the presence of stains present on the molars and incisors were essential to make the diagnosis of MIH. It was suggested to carry out provisional restorations with glass ionomer cement and then be replaced by composite resin. Thus, it is extremely important that this condition is clinically recognized, and that their causes are identified to provide appropriate treatment through its differential diagnosis.