 Twenty one children aged 46-81 months mean 62.8 months completed a randomized clinical trial and were followed-up for adverse events from a total of 37 children 27 were excluded because of being outside the age range of the survey, did not present negative behavior or had have prior dental treatment. These children were classified as ASA PS 1 or 2, and were referred to the Dental Sedation Study Center NESO of the Federal University of Goiás School of Dentistry by public health services. 