Performance of Glass-ionomer Cements: 2-year Follow-up

Inclusion Criteria: * Volunteers that having at least two permanent first molars of opposite sides of the mouth, erupted in the oral cavity, caries-free and high-risk disease (presence of white spots, history of caries, plaque in smooth surfaces and gingivitis); * Children who had one or two bilateral matched pairs of carious deciduous molars that required either class I or class II restorations. Exclusion Criteria: * Children who did not meet the minimum requirements for the achievement of sealants or parents / guardians did not agree to participate; * No history of spontaneous pulpal pain.