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Distribution of malocclusion types in 7-9-year-old Iranian children

S M Danaie1, Z Asadi, P Salehi

  • 1Department of Orthodontics, Faculty of Dentistry, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran. momenish@sums.ac.ir

Eastern Mediterranean Health Journal = La Revue De Sante De La Mediterranee Orientale = Al-Majallah Al-Sihhiyah Li-Sharq Al-Mutawassit
|October 14, 2006
PubMed

Insights

This study found that nearly half of 7-9-year-old children in Shiraz had malocclusion, with Class I being most common. Over 47% experienced crowding, indicating a potential need for early orthodontic intervention.

Area of Science:

  • Dentistry
  • Orthodontics
  • Pediatric Oral Health

Background:

  • Malocclusion prevalence varies globally in children.
  • Early identification of severe crowding is crucial for timely orthodontic treatment planning.
  • Serial extraction is a common orthodontic approach for managing severe crowding in mixed dentition.

Purpose of the Study:

  • To determine the prevalence of different malocclusion types in a sample of Iranian children.
  • To assess the incidence of severe dental crowding and the need for serial extraction.
  • To investigate potential correlations between malocclusion and demographic factors.

Main Methods:

  • A random sample of 3776 children aged 7-9 years in Shiraz, Iran, was examined.
  • Malocclusion was classified according to standard orthodontic criteria.
  • Data on dental crowding and potential demographic associations were collected and analyzed.

Main Results:

  • 30.6% had normal occlusion; 47.4% had Class I malocclusion; 13.7% had Class II division 1; 1.0% had Class II division 2; and 2.1% had Class III malocclusion.
  • 47.9% of children exhibited dental crowding, with 14.7% having Class I malocclusion and very severe crowding.
  • Higher prevalence of severe crowding was noted in girls (17.3%) compared to boys (12.1%).

Conclusions:

  • Class I malocclusion and significant dental crowding are prevalent in 7-9-year-old children in Shiraz.
  • A substantial proportion of children may benefit from serial extraction, particularly those with Class I malocclusion and severe crowding.
  • No significant correlation was found between malocclusion types and family size, parental occupation, or education level in this population.

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