ABSTRACT
The relationship between IQ score and malocclusion is a subject that has been the focus of attention in the field of orthodontics. The present study aimed at determining the IQ score of patients with dentoskeletal malocclusions presenting to the Orthodontic Department of Shahid Beheshti Dental School during 2008-2009. This descriptive cross-sectional study was conducted on 160 patients aged 12-18 yrs. who were receiving orthodontic treatment. A questionnaire was designed containing 3 sections of demographic characteristics, general information and orthodontic treatment. The questionnaire was completed by the patient and senior dental students and patients were asked to take the Cattell Culture Fair III IQ test on the computer and the obtained IQ score was recorded. Data were analyzed using linear regression analysis. The mean IQ score of the understudy population was 98 +/- 16. IQ score had a significant correlation with level of education [P<0.001], age [P<0.001] and socioeconomic status [P<0.001]. However, type of skeletal malocclusion and facial growth pattern were not correlated with the IQ score. The obtained results showed no association between type of skeletal malocclusion or facial growth pattern and the IQ score