Clinical Performance of Posterior Glass Ionomer Restorations in Adolescents (KETAC)

Criteria: - Inclusion Criteria: - needs 2 Class II posterior restorations - in good health - sufficient oral hygiene - vital tooth - caries in the outer and/or middle third of dentin - teeth must have at least one proximal contact to be restored - isthmus is less than half the intercuspal distance - has one or more enamel-supported antagonistic contact. - both study restorations are not in contact with each other Exclusion Criteria: - pregnant or breast feeding - erosion/eating disorders - bruxism/traumatic malocclusion - pulpitis - cusp replacement - radiographic bone loss/increased tooth mobility Dental Caries Device: Ketac Universal;Device: Ketac Molar Quick Restoration survival Clinical Performance of restoration and restored tooth;Additional Collection of Adverse Events Data