الفهرس 
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Abstract
The current study was carried out in Faculty of Dentistry, Alexandria University over a period of two years aiming to evaluate the relation between BMI, dietary status, and dental crowding in school aged children. Seventy four children participated in the study ;37 males and 37 females with lower anterior crowding recruited form the Pediatric Dental Clinics, Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Alexandria University
Data was collected from each patient by taking primary impression for maxillary and mandibular arches using suitable aluminum trays. Study casts were poured, and each cast was subjected to arch length analysis by means of Moyers analysis probability chart. Each participant’s age, weight, height and activity levels were gathered and tabulated. BMI was calculated for each patient. Also, diet analysis was obtained by collecting 5 days food and drinks consumption for each patient for meals and snacks including weekend. The researcher compared patient’s diet to the recommended one according to DRI calculator online tool. Each patient was categorized to be healthy, overweight, underweight, and obese according to BMI calculation tool.
The present study showed that there was no statistically significant difference between males and females in relation to arch discrepancies. Underweight cases were more likely to have dental crowding values in comparison to other BMI categories, but it was not statistically significant. There was no relation between low calories diet and arch measurements among the study sample. Furthermore, low protein diet was found to be seen more in higher arch discrepancy cases with no statistically significant difference.