Alejandra Jans Muñoz; Jaime Díaz Meléndez; Carolina Vergara González & Carlos Zaror Sánchez


Molar incisor hypomineralization (MIH) is a tooth development disorder, which would be associated with systemic causes, and involves at least one or more first permanent molars, incisors may be compromised. The prevalence of this syndrome varies in literature between 2.5 to 40% of the world's children. The aim of this study was to determine the frequency and severity of MIH between patients attended at the Graduate Pediatric Dentistry Clinic of the Universidad de La Frontera and the possible associated factors. We conducted a descriptive study of 334 children between 6 and 13 years of age. The review was conducted by 2 examiners at the Universidad de La Frontera. The diagnosis, according to the criteria established by Weerheijm et al (2003) and severity according to the criteria proposed by Mathu-Muju & Wright (2006). The prevalence found corresponded to 16.8%. Of these, 57% showed severe signs of MIH, 20% and 23% moderate and mild signs respectively. No significant differences by sex and age for the presence of MIH or its severity. 87% of those affected reported morbid history in the period from pre-early childhood. This disorder has high prevalence in patients sampled, comparable to that established in studies worldwide.

KEY WORDS: disturbance of odontogenesis, amelogenesis, molar-incisor hypomineralization, prevalence, structural enamel defects.

How to cite this article

JANS, M. A.; DÍAZ, M. J.; VERGARA, G. C. & ZAROR, S. C. Frequency and severity of the molar incisor hypomineralization in patients treated at the dental clinic of the Universidad de la Frontera. Int. J. Odontostomat., 5(2):133-138, 2011.