The prevalence and aetiology of molar-incisor hypomineralisation in a group of children in Istanbul.
OBJECTIVE
To our knowledge, the prevalence and aetiology of molar-incisor hypomineralisation has not been discussed nor investigated in Turkish children in Istanbul. Therefore the aim of the present study is to investigate the prevalence and aetiology of MIH in a group of children in Istanbul.


METHODS
Between April and July 2007, a retrospective clinical study was initiated at the Dept. of Paediatric Dentistry, School of Dentistry, Yeditepe University, Istanbul, Turkey. A total of 147 children aged 7-9 years visiting our clinic were examined by two calibrated paediatric dentists (kappa: 0.89). The examiners used the criteria for the diagnosis of demarcated opacities, post-eruption breakdown, atypical restorations, and extracted PFMs due to MIH developed by Weerheijm et al.


RESULTS
In the present study, prevalence of MIH was 14.9%. Of the 22 children affected with MIH, 17 (77.2%) had only demarcated opacities, but no breakdown or atypical restorations. Regarding diseases in the first 3 years of life, 55% of MIH and 19.4% of non-MIH children had a disease history. 27% of MIH children had suffered from upper and lower respiratory tract infections including bronchitis. This was significantly different from non-MIH children (p<0.001).


CONCLUSIONS
MIH was common among a group of 7-9 years old children, Istanbul.
Dept. of Paediatric Dentistry, Dental School, Yeditepe University, Istanbul, Turkey.
O Onder
OO
Kusku
E
E
Caglar
N
N
Sandalli
D000367:Age Factors; D001991:Bronchitis / Q000453:epidemiology; D002648:Child; D003743:Dental Enamel / Q000473:pathology; D003793:Dental Restoration, Permanent / Q000145:classification; D006801:Humans; D007180:Incisor / Q000473:pathology*; D008963:Molar / Q000473:pathology*; D015995:Prevalence; D012141:Respiratory Tract Infections / Q000453:epidemiology; D012189:Retrospective Studies; D017001:Tooth Demineralization / Q000453:epidemiology*; D014081:Tooth Extraction / Q000706:statistics & numerical data; D014421:Turkey / Q000453:epidemiology