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Year : 2018  |  Volume : 8  |  Issue : 2  |  Page : 44-48

The prevalence of molar-incisor hypomineralization in primary schoolchildren aged 7–9 years in Qassim Region of Saudi Arabia

Department of Public Health, Pedodontics and Orthodontics, College of Dentistry Al Rass, Qassim University, Al-Qassim, Kingdom of Saudi Arabia

Correspondence Address:
Hazim Rizk
Department of Public Health, Pedodontics and Orthodontics, College of Dentistry Al Rass, Qassim University, Buraydah, Al-Qassim
Kingdom of Saudi Arabia
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jid.jid_77_17

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Context: Molar-incisor hypomineralization (MIH) is described as hypomineralization of systemic origin affecting one or more first permanent molar and incisors. Aims: This study aims to evaluate the prevalence of MIH in primary schoolchildren from 7 to 9 years in Qassim region. Settings and Design: A cross sectional study included 411 school children aged 7-9 years chosen by stratified random sampling from public schools in 7 different cities of Qassim Region, Saudi Arabia. Subjects and Methods: This cross-sectional study was carried out to determine the MIH prevalence in randomly selected sample of 411 Saudi Arabian schoolchildren aged 7–9 years in Qassim region of Saudi Arabia. All the examinations were performed in the children's schools in good daylight by a single examiner, to eliminate interexaminer variability. The examiner was calibrated with the MIH diagnostic criteria of the European Academy of Pediatric Dentistry. Statistical Analysis Used: Descriptive statistics displayed in the form of frequency and percentage. Comparison between different study groups using Chi-square tests at significance level P < 0.05. Results: The overall prevalence of MIH in our study was 25.1% (n = 103). Of these, 256 teeth (5.2%) displayed only demarcated opacity and 42 teeth (0.9%) had posteruptive enamel breakdown. Conclusions: The prevalence of MIH in Al-Qassim region, Saudi Arabia in 7–9-year-old children is high (25.1%) with no significant difference between upper and lower jaws.

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