The Relationship Between Body Mass Index, Dental Eruption and Dental Caries Prevalence in School Children: A Cross-sectional, Observational Study

Obesity is an abnormal accumulation of body fat. This accumulation of extra fat within the body may have either environmental or genetic causes . Obese children and adolescents are at increased risk for developing diabetes, metabolic problems, high blood pressure hypertension, coronary artery disease, sleep apnea, orthopedic problems, and psychosocial disorders.

Body mass index is the definition of obesity for children and adolescents. It is a formula that considers an individual's height and weight to determine body fat and health risk. For children it is calculated by this formula: weight ÷ (height x height).

For children and teens, BMI is age- and sex-specific and is often referred to as BMI-for-age. A child's weight status is determined using an age- and sex-specific percentile for BMI rather than the BMI categories used for adults. This is because children's body composition varies as they age and varies between boys and girls. Therefore, BMI levels among children and teens need to be expressed relative to other children of the same age and sex.

Obesity and dental caries are multifactorial conditions, both having comprehensive etiology and factors such as dietary habits and available nutrients, oral hygiene, or saliva . Changes in diet and lifestyle, such as an increase in wealth and access to carbohydrate-rich, high-calorie food and drinks could be attributed to the increase in the prevalence of both dental caries and obesity.

Several studies have evaluated the relationship between tooth decay and obesity; however, results are sometimes contradictory but recent studies showed that underweight children may experience higher dental caries than normal weight and overweight children.