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European Archives of Paediatric Dentistry

, Volume 15, Issue 2, pp 75–82 | Cite as

Molar–incisor hypomineralisation: a prevalence study amongst primary schoolchildren of Shiraz, Iran

  • A. Ghanim
  • R. Bagheri
  • A. Golkari
  • D. Manton
Original Scientific Article

Abstract

Aim

To investigate the prevalence of molar–incisor hypomineralisation (MIH) amongst primary schoolchildren of Shiraz, Iran, taking into account the possible influence of biographic and socio-demographic parameters.

Study design and methods

A randomised cluster sample of 9- to 11-year-old children (N = 810) had their first permanent molars and incisors (index teeth) evaluated using the European Academy of Paediatric Dentistry criteria for MIH. The examinations were conducted at schools by a calibrated examiner. Prevalence of MIH was assessed based on biographic and socio-demographic parameters including area of residency, school type, father’s level of education, weight-for-age and height-for-age.

Results and statistics

Of the children examined, 164/810 (20.2 %) had MIH and 53.7 % of them presented with MIH lesions in all first molars. Mild defects represented by demarcated yellow brown opacities comprised 35.5 % of the total MIH lesions. The prevalence of MIH was significantly greater in girls, children with healthy body weight and height, those whose fathers did not have a tertiary education and from families of low socio-economic status. Regression analyses indicated that none of the biographic and socio-demographic variables represented a significant risk factor in the occurrence of MIH except for body weight. Obesity was negatively correlated to MIH (OR = 0.45; 95 % CI 0.25–0.82).

Conclusions

The prevalence of MIH in a group of Iranian children was 20.2 %. Biographic and socio-demographic parameters appeared to have no significant correlation with MIH except body weight, which warrants further research.

Keywords

Molar–incisor hypomineralisation MIH Prevalence Developmental enamel defects Shiraz Iran 

Notes

Acknowledgments

This research was partly supported by Shiraz University of Medical Sciences. The authors thank all students who participated in this study and also appreciate the Schools’ staffs for their assistant to facilitate collecting the data. We also acknowledge Dr M.R. Azar (The Head of Shiraz Dental School) for his support in carrying out this study. Special thanks to Dr D. Bailey, Dr H. Haydari, Mr F. Banizaman Lari (Lecturer in Farhangian University) and Mrs R. Keshavarzi for their valuable assistance throughout the study.

References

  1. Ahmadi R, Ramazani N, Nourinasab R. Molar incisor hypomineralization: a study of prevalence and etiology in a group of Iranian children. Iran J Pediatr. 2012;22:245–51.PubMedCentralPubMedGoogle Scholar
  2. Alaluusua S. Aetiology of molar–incisor hypomineralisation: a systematic review. Eur Arch Paediatr Dent. 2010;11:53–8.PubMedCrossRefGoogle Scholar
  3. Arrow P. Prevalence of developmental enamel defects of the first permanent molars among school children in Western Australia. Aust Dent J. 2008;53:250–9.PubMedCrossRefGoogle Scholar
  4. Arrow P. Risk factors in the occurrence of enamel defects of the first permanent molars among schoolchildren in Western Australia. Community Dent Oral Epidemiol. 2009;37:405–15.PubMedCrossRefGoogle Scholar
  5. Balmer R, Toumba J, Godson J, Duggal M. The prevalence of molar incisor hypomineralisation in Northern England and its relationship to socioeconomic status and water fluoridation. Int J Paediatr Dent. 2012;22:250–7.PubMedCrossRefGoogle Scholar
  6. Crombie F, Manton DJ, Kilpatrick N. Molar incisor hypomineralization: a survey of members of the Australian and New Zealand Society of Paediatric Dentistry. Aust Dent J. 2008;53:160–6.PubMedCrossRefGoogle Scholar
  7. da Costa-Silva CM, Ambrosano GM, Jeremias F, De Souza JF, Mialhe FL. Increase in severity of molar–incisor hypomineralization and its relationship with the colour of enamel opacity: a prospective cohort study. Int J Paediatr Dent. 2011;21:333–41.PubMedCrossRefGoogle Scholar
  8. da Costa-Silva CM, Jeremias F, de Souza JF et al. Molar incisor hypomineralization: prevalence, severity and clinical consequences in Brazilian children. Int J Paediatr Dent. 2010;20:426–34.PubMedCrossRefGoogle Scholar
  9. Elfrink ME, Ten Cate JM, Jaddoe VW, Hofman A, Moll HA, Veerkamp JS. Deciduous molar hypomineralization and molar incisor hypomineralization. J Dent Res. 2012;91:551–5.PubMedCrossRefGoogle Scholar
  10. Fagrell TG, Ludvigsson J, Ullbro C, Lundin SA, Koch G. Aetiology of severe demarcated enamel opacities—an evaluation based on prospective medical and social data from 17,000 children. Swed Dent J. 2011;35:57–67.PubMedGoogle Scholar
  11. Federation Dentaire International (FDI). Commission on Oral Health, Research and Epidemiology. A review of the development defects of enamel index (DDE Index). Int Dent J. 1992;42:411–26.Google Scholar
  12. Fteita D, Ali A, Alaluusua S. Molar–incisor hypomineralization (MIH) in a group of school-aged children in Benghazi, Libya. Eur Arch Paediatr Dent. 2006;7:92–5.PubMedCrossRefGoogle Scholar
  13. Ghanim A, Morgan M, Mariño R, Manton D, Bailey D. Perception of molar–incisor hypomineralisation (MIH) by Iraqi Dental Academics. Int J Paediatr Dent. 2011a;21:261–70.PubMedCrossRefGoogle Scholar
  14. Ghanim A, Morgan M, Mariño R, Bailey D, Mariño R. Molar–incisor hypomineralisation: prevalence and defect characteristics in Iraqi children. Int J Paediatr Dent. 2011b;21:413–21.PubMedCrossRefGoogle Scholar
  15. Ghanim A, Manton D, Mariño R, Morgan M, Bailey D. Prevalence of demarcated hypomineralisation defects in second primary molars in Iraqi Children. Int J Paediatr Dent. 2013a;23:48–55.PubMedCrossRefGoogle Scholar
  16. Ghanim A, Manton D, Bailey D, Mariño R, Morgan M. Risk factors in the occurrence of molar–incisor hypomineralization among a group of Iraqi children. Int J Paediatr Dent. 2013b;23:197–206.PubMedCrossRefGoogle Scholar
  17. Ghanim A, Morgan M, Mariño R, Bailey D, Manton D. An in vivo investigation of salivary properties, enamel hypomineralisation and carious lesion severity in a group of Iraqi schoolchildren. Int J Paediatr Dent. 2013c;23:2–12.PubMedCrossRefGoogle Scholar
  18. Golkari A. Developmental defects of enamel as biomarkers of early childhood life events: Developing methods for their use in life course epidemiology. Thesis Submitted for PhD Degree, University College London, 2009Google Scholar
  19. Hosseini M, Carpenter RG, Mohammad K. Growth charts for Iran. Ann Hum Biol. 1998a;25:237–47.PubMedCrossRefGoogle Scholar
  20. Hosseini M, Carpenter RG, Mohammad K. Growth charts for Iran. Ann Hum Biol. 1998b;25:249–61.PubMedCrossRefGoogle Scholar
  21. ISC. Iran Statistical Yearbook of the Year 1377. Tehran: Statistical Centre of Iran; 1999.Google Scholar
  22. Jälevik B, Klingberg G. Treatment outcomes and dental anxiety in 18-year-olds with MIH, comparisons with healthy controls-a longitudinal study. Int J Paediatr Dent. 2012;22:85–91.PubMedCrossRefGoogle Scholar
  23. Jälevik B. Prevalence and diagnosis of molar–incisor-hypomineralisation (MIH): a systematic review. Eur Arch Paediatr Dent. 2010;11:59–64.PubMedCrossRefGoogle Scholar
  24. Jasulaityte L, Veerkamp KL, Weerheijm KL. Molar incisor hypomineralization: review and prevalence data from a study of primary school children in Kaunas (Lithuania). Eur Arch Paediatr Dent. 2007;8:87–94.PubMedCrossRefGoogle Scholar
  25. Kosem R, Senk-Erpic A, Kosir N, Kastelec D. Prevalence of enamel defects with emphasis on MIH in Slovenian children and adolescents. Eur J Paediatr Dent. 2004;3(Suppl):17.Google Scholar
  26. Landis JR, Koch GG. The measurement of observer agreement for categorical data. Biometrics. 1977;33:159–74.PubMedCrossRefGoogle Scholar
  27. Leppäniemi A, Lukinmaa PL, Alaluusua S. Non-fluoride hypomineralizations in the first molars and their impact on the treatment need. Caries Res. 2001;35:36–40.PubMedCrossRefGoogle Scholar
  28. Lygidakis NA, Dimou G, Briseniou E. Molar–incisor-hypomineralisation (MIH). Retrospective clinical study in Greek children. I. Prevalence and defect characteristics. Eur Arch Paediatr Dent. 2008;9:200–6.PubMedCrossRefGoogle Scholar
  29. Lygidakis NA, Wong F, Jälevik B et al. Best clinical practice guidance for clinicians dealing with children presenting with molar–incisor-hypomineralisation (MIH): an EAPD Policy Document. Eur Arch Paediatr Dent. 2010;11:75–81.PubMedCrossRefGoogle Scholar
  30. Mahoney EK, Morrison DG. The prevalence of molar–incisor hypomineralisation (MIH) in Wainuiomata children. N Z Dent J. 2009;105:121–7.PubMedGoogle Scholar
  31. Mahoney EK, Morrison DG. Further examination of the prevalence of MIH in the Wellington region. N Z Dent J. 2011;107:79–84.PubMedGoogle Scholar
  32. Martínez Gómez TP, Guinot Jimeno F, Bellet Dalmau LJ, Giner Tarrida L. Prevalence of molar–incisor hypomineralisation observed using transillumination in a group of children from Barcelona (Spain). Int J Paediatr Dent. 2012;22:100–9.PubMedCrossRefGoogle Scholar
  33. Motlagh MG, Khaniki GRJ, Adiban H. Investigation of dental caries prevalence among 6–12 year old elementary school children in Andimeshk, Iran. J Med Sci. 2007;7:116–20.CrossRefGoogle Scholar
  34. Ong DC, Bleakley JE. Compromised first permanent molars: an orthodontic perspective. Aust Dent J. 2010;55:2–14.PubMedCrossRefGoogle Scholar
  35. Preusser SE, Ferring V, Wleklinski WE. Prevalence and severity of molar incisor hypomineralization in a region of Germany—a brief communication. J Public Health Dent. 2007;67:148–50.PubMedCrossRefGoogle Scholar
  36. Soviero V, Haubek D, Trindade C, Matta TD, Poulsen S. Prevalence and distribution of demarcated opacities and their sequelae in permanent 1st molars and incisors in 7 to 13-year-old Brazilian children. Acta Odontol Scand. 2009;67:170–5.PubMedCrossRefGoogle Scholar
  37. Suckling GW, Brown RH, Herbison GP. The prevalence of developmental defects of enamel in 696 nine-year-old New Zealand children participating in a health and development study. Community Dent Health. 1985;2:303–13.PubMedGoogle Scholar
  38. Weerheijm K, Duggal M, Mejàre I et al. Judgement criteria for molar–incisor hypomineralisation (MIH) in epidemiologic studies: a summary of the European meeting on MIH held in Athens, 2003. Eur J Paediatr Dent. 2003;4:110–3.PubMedGoogle Scholar
  39. Wogelius P, Haubek D, Poulsen S. Prevalence and distribution of demarcated opacities in permanent 1st molars and incisors in 6 to 8-years-old Danish children. Acta Odontol Scand. 2008;66:58–64.PubMedCrossRefGoogle Scholar
  40. Zawaideh FI, Al-Jundi SH, Al-Jaljoli MH. Molar incisor hypomineralisation: prevalence in Jordanian children and clinical characteristics. Eur Arch Paediatr Dent. 2011;12:31–6.PubMedCrossRefGoogle Scholar

Copyright information

© European Academy of Paediatric Dentistry 2013

Authors and Affiliations

  • A. Ghanim
    • 1
    • 2
  • R. Bagheri
    • 1
    • 3
  • A. Golkari
    • 4
  • D. Manton
    • 1
    • 5
  1. 1.Cooperative Research Centre for Oral Health Science, Melbourne Dental SchoolUniversity of MelbourneMelbourneAustralia
  2. 2.Department of Paediatric Dentistry and Epidemiology, Mosul Dental CollegeUniversity of MosulNinevehIraq
  3. 3.Dental Material Department, Biomaterial Research Centre, Shiraz Dental SchoolShiraz University of Medical SciencesShirazIran
  4. 4.Dental Public Health Department, Shiraz Dental SchoolShiraz University of Medical SciencesShirazIran
  5. 5.Elsdon Storey Chair of Child Dental Health, Growth and Development, Melbourne Dental SchoolThe University of MelbourneMelbourneAustralia

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