Participant flow diagram in the different phases of the study design. Abbreviations: np – number of participants; nr – number of restorations; (*) SEEBSy, self-etch with selective enamel etching and bulk in syringe; SETBSy, self-etch and bulk in syringe; SEEBCa, self-etch with selective enamel etching and bulk in capsule; SETBCa, self-etch and bulk in capsule; SEEIn, self-etch with selective enamel etching and incremental composite; SETIn, self-etch and incremental composite
BLIND
The randomization list was numbered consecutively and was individually placed in opaque sealed envelopes opened on the day of the restorative intervention to prevent disclosure of the randomization scheme. The operator who conducted the interventions was not blinded. However, participants and examiners were kept blind to the group allocation during examinations.