Molar-incisor hypomineralization (MIH) is a qualitative disorder of dental enamel, where 10%-20% of children and adolescents are affected due to extensive enamel breakdown.

Aim: To analyze the literature about molar incisor hypomineralization, its etiology and clinical characteristics, as well as its effects on adherence and different treatment plans.

Methods: The search for published articles was carried out using the PubMed and Google Scholar databases. Keywords used for the search include “Molar-incisor hypomineralization”, “Him”, “Restorative treatment”, “Adhesion”.

Results: Him is an enamel defect associated with premature births, fever, and infectious diseases in childhood. It presents with demarcated opacities of white, yellow or brown color due to breakdown of the enamel causing hypersensitivity. The microstructural characteristics of hypomineralized enamel generate adhesion problems, for which the most widely used protocol is the total removal of the affected tissue. Among the treatments are from ionomers to ceramics, depending on the degree of condition and cooperation of the patient.

Conclusion: To carry out the restorative treatment in pieces with him, it is necessary to follow protocols with greater care. An early diagnosis and appropriate treatment are ideal to give the affected parts a better prognosis.