Objectives: The study aimed to determine the bonding effectiveness of different self-adhesive resin cements to dentin with/out simulated intrapulpal pressure (PP). Methods: Three self-adhesive cements [1.Multilink Sprint (Ivoclar-Vivadent); 2. Max-Cem (Kerr); 3. SAC-A (Kuraray)] were used in dual-curing mode for luting eighteen composite overlays [(AElite All Purpose (Bisco)] to flat mid-coronal dentin surfaces under a PP of zero or 15 cm H2O. After 1 month (37°C; 100% relative humidity), microtensile beams (1 mm2) were cut and stressed to failure under tension. The fracture pattern was evaluated under SEM. Data were statistically analysed with Kruskal-Wallis on ranks (p<0.05) and Mann-Whitney tests (p<0.001) including premature failures. Results: Mean bond strength values (MPa) and SD of the tested cements are summarized in the Table. No significant differences were highlighted with or without PP. SAC-A performed better than Multilink Sprint and Max-Cem. No differences were recorded between the latters in the same experimental conditions. Conclusions: The tested resin cements exhibit a similar behavior when applying or not a PP. The SAC-A cement showed the higher bond strength data.
Letters in each column and numbers in each row indicate significant differences.
Experimental groups | Pulpal Pressure | No Pulpal Pressure |
Mean (SD) | Mean (SD) | |
Multilink Sprint | 2.3 (4.4) b1 | 4.5 (6.4) b1 |
Max-Cem | 2.8 (9.0) b1 | 4.2 (11.1) b1 |
SAC-A | 7.27(22.14)a1 | 7.34(9.09)a1 |