Dental caries is a public health problem in Belo Horizonte, state capital of Minas Gerais (southeastern Brazil) [1, 2], as well as in other Brazilian cities , and in many countries . In 2010, untreated caries in permanent teeth was the most prevalent health condition worldwide, affecting 2.4 billion people, and untreated caries in deciduous teeth was the 10th most prevalent health condition, affecting 621 million children worldwide . In Brazilian children, data from the 2010 Oral Health Project reveal that 56.5% of 12-year-olds have at least one permanent tooth with dental caries experience. This represents approximately 1.7 million children . Brazilian children also have a high prevalence of malocclusion (38.8%) and traumatic dental injury (20.5%) up to the age of 12 years .