Partial removal techniques and atraumatic restorative treatment are therapeutic options for the treatment of minimally invasive carious lesions in young children and socially disadvantaged populations. The purpose of this research is to determine the survival rate of Class I restorations performed in deciduous first molars with the atraumatic restorative technique. For this purpose, it was necessary to carry out a study through a clinical trial, split-mouth type. The variables evaluated were: survival of the restoration, restorative vitreous ionomer brand, restoration failures and evaluation time. The survival rate was 96%, 94% and 88% for Ketac Molar Easy Mix restorations and 86%, 76% and 68% for Riva Self Cure restorations after 2, 4 and 6 months of evaluation. The most frequent failures were: wear greater than 1mm and partial or total loss of the restoration, with the Riva Self Cure ionomer having the highest percentage of failures compared to Ketac Molar Easy Mix. A focus group was developed and the Pareto diagram was used to determine the actions needed to prevent caries

atraumatic restorative treatment; vitreous ionomer cements; pediatric dentistry