Influence of pretreatments on microtensile bond strength to eroded dentin using a universal adhesive in self-etch mode

To evaluate the influence of pretreatments on microtensile bond strength (μTBS) to eroded dentin when using a universal adhesive in self-etch mode. Forty-eight human molars were randomly assigned six groups (G1–G6, n = 8) and ground down until exposure. G2–G6 with citric acid (pH 2.6) for 10 × 2 min (within 12 h) 5 consecutive days. G1 G2 served as uneroded controls not pretreated. G3 G4 pretreated 60 s NaOCl (10% 5%, respectively). G5 was airborne-particle abraded Al2O3 15 s, G6 roughened diamond bur. The Scotchbond Universal applied After composite build-up, μTBS determined. Control group (uneroded) showed higher than (eroded). (mean MPa ±SD) (airborne-particle abrasion; 11.6 ± 4.6) (bur-roughening; 11.0 3.3) did differ significantly from (12.4 4.2). Significantly compared all other observed (NaOCl 10%; 17.6 7.6). Pretreatment 5% (G4) achieved lower (3.5 groups, except (8.8 2.0). 10% NaOCl, bur roughening or abrasion can increase tested dentine. Pre-treatment is recommended.