Abstract
Defects similar to Molar-Incisor Hypomineralization (MIH) in second primary molars can be found in the literature, being recently named Deciduous Molar Hypomineralization (DMH). Researchers have stated that the presence of DMH in primary dentition represents a risk for MIH in permanent teeth. The explanation for this association is probably related to the etiological factors. AIM: To investigate prospectively the association between DMH and MIH and the etiologic factors involved in both defects. METHODS: One hundred and thirty four children aged 4 to 6 years from Botelhos, MG, Brazil, were evaluated six-monthly until they completed the eruption of the first permanent molars. A structured questionnaire was developed with questions about the child's health up to the first year of life and the mother's health during pregnancy. RESULTS: It could be noted that, although most children with DMH in the primary dentition had higher incidence of MIH in permanent dentition, this difference was not statistically significant. CONCLUSIONS: None of the possible etiologic factors had associations with the studied enamel defects, even among children who presented two types of enamel defects in the mixed dentition. However, further studies with larger samples should be conducted in order to confirm or refute the findings of the present study.
Highlights
Received for publication: September 21, 2013 Accepted: December 03, 2013Correspondence to: Fábio Luiz MialheDepartamento de Odontologia Social Faculdade de Odontologia de PiracicabaUniversidade Estadual de Campinas Avenida Limeira 901, CEP: 13414-903In 2001, the term Molar-Incisor Hypomineralization (MIH) was proposed by Weerheijm et al.[1] (2001) to describe localized enamel defects in permanent molars and incisors
Researchers suggest that the presence of Deciduous Molars Hypomineralization (DMH) in primary dentition presents a risk to the permanent presence of MIH12
The prevalence of DMH and MIH found in this study was higher compared to other studies in Europe[11,12,18]
Summary
Received for publication: September 21, 2013 Accepted: December 03, 2013Correspondence to: Fábio Luiz MialheDepartamento de Odontologia Social Faculdade de Odontologia de PiracicabaUniversidade Estadual de Campinas Avenida Limeira 901, CEP: 13414-903In 2001, the term Molar-Incisor Hypomineralization (MIH) was proposed by Weerheijm et al.[1] (2001) to describe localized enamel defects in permanent molars and incisors. Reports of defects similar to MIH in second molars can be found in the literature[10,11], which was recently named Deciduous Molars Hypomineralization (DMH). In addition to their asymmetric distribution, other similar features between DMH and MIH draw attention, as post-eruptive structural losses and atypical restorations[11]. Researchers suggest that the presence of DMH in primary dentition presents a risk to the permanent presence of MIH12. The explanation for this association is probably related to the etiological factors of developmental defects in enamel, because
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