Trial With Two New Tooth-colored Restorative Materials in Class I/II Cavities

Inclusion Criteria: * Subject's age between 18 and 65 years old * Class I and Class II (with a cavity margin 1-1.5 mm from the cusp tip) (caries treatment, removal of existing defective amalgam/composite restorations), on premolars/molars * Vital teeth * 2 restorations per patient: both cavities should have comparable size and dimensions * Presence of neighbour tooth and antagonist (molars with no neighbour tooth at the distal side can also be included) * Low to moderate caries rate/normal periodontal status with good home care Exclusion Criteria: * Hospitalized and medically compromised patients (medical history may not compromise the outcome of the results) * Pulp exposure or signs of pulpal infection * No signs of pulpitis or hypersensitivity (Visual analog scale \< 3 on biting and temperature sensitivity) * History of allergy to glass ionomer, acrylate/methacrylate monomers * Pregnancy * Chronic disease with oral manifestations or primary oral pathology * Bad oral hygiene * High caries rate or periodontal problems * Absence of antagonists * Absence of adjacent teeth (except last molar in the row with no neighbour tooth at the distal side)