Table 1.
Description of the study groups.
Table 2.
Composition and application mode of the used adhesives system.
Fig 1.
Schematic representation of the two coronal slices, two middle slices and two apical slices obtained from fiber post cemented in root canal space.
Table 3.
Push-out bond strength values (mean ± standard deviation in MPa) of the tested groups.
Table 4.
Results of multiple comparisons by Tukey test.
Fig 2.
Representative SEM images of the adhesive interface in the seven study groups at low and high magnifications.
a and A: OS/H, intimate adaptation with resin tag formation was observed; b and B: CSE/H, no gap was seen with few short and some fractured resin tags; c and C: CSE/ED, a well-adapted interface was found with homogenous compact resin tags; d and D: AB-Er/H, a well-formed interface was detected with numerous long resin tags; e, E: AB-Se/H, gap formation was revealed with no resin tags; f and F: AB-Se/ED, an adapted interface was detected with uneven resin tag formation; g and G: AB-Se/W, good adaptation was seen with resin tag formation.
Fig 3.
Schematic representation showing the adhesion mechanism at the adhesive interface.
Table 5.
The length of resin tags (in μm) formed at the adhesive interface for the tested groups.