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. 2014:2014:234508.
doi: 10.1155/2014/234508. Epub 2014 May 8.

Molar incisor hypomineralization, prevalence, and etiology

Sulaiman Mohammed Allazzam  1 , Sumer Madani Alaki  2 , Omar Abdel Sadek El Meligy  3
Affiliations

Molar incisor hypomineralization, prevalence, and etiology

Sulaiman Mohammed Allazzam et al. Int J Dent. 2014.

Abstract

Aim. To evaluate the prevalence and possible etiological factors associated with molar incisor hypomineralization (MIH) among a group of children in Jeddah, Saudi Arabia. Methods. A group of 8-12-year-old children were recruited (n = 267) from the Pediatric Dental Clinics at the Faculty of Dentistry, King Abdulaziz University. Children had at least one first permanent molar (FPM), erupted or partially erupted. Demographic information, children's medical history, and pregnancy-related data were obtained. The crowns of the FPM and permanent incisors were examined for demarcated opacities, posteruptive breakdown (PEB), atypical restorations, and extracted FPMs. Children were considered to have MIH if one or more FPM with or without involvement of incisors met the diagnostic criteria. Results. MIH showed a prevalence of 8.6%. Demarcated opacities were the most common form. Maxillary central incisors were more affected than mandibular (P = 0.01). The condition was more prevalent in children with history of illnesses during the first four years of life including tonsillitis (P = 0.001), adenoiditis (P = 0.001), asthma (P = 0.001), fever (P = 0.014), and antibiotics intake (P = 0.001). Conclusions. The prevalence of MIH is significantly associated with childhood illnesses during the first four years of life including asthma, adenoid infections, tonsillitis, fever, and antibiotics intake.

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Figures

Figure 1
Figure 1
Diagnostic criteria of molar incisor hypomineralization. (a) Demarcate opacities (incisors). (b) Posteruptive breakdown (molars). (c) Atypical restorations (molars). (d) Extracted molars.
Figure 2
Figure 2
Prevalence of MIH in maxillary and mandibular permanent index teeth. The prevalence of MIH was higher in maxillary compared to mandibular central incisors (P = 0.01).
Figure 3
Figure 3
Prevalence of MIH in each permanent index tooth. Upper central incisors were more affected by MIH than lower central incisors (P = 0.01).
See this image and copyright information in PMC

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