Table 1.
Composition of materials used according to manufacturers except reference is provided.
Figure 1.
Representative microscopic images using CLSM for the measurement of the hybrid layer (indicated with arrows) for the etch-and-rinse adhesive XPBond/Self Cure Activator with Core X Flow (A) and for the self-etch adhesive system Futurabond DC with Rebilda DC (B).
Figure 2.
CLSM images of the etch-and-rinse adhesive system Prebond and Luxabond A&B (green) with Luxacore Z (red) (A) and the self-etch adhesive system AdheSE DC (green) used with Multicore Flow (red) (B).
Arrows indicate exemplary penetration of the core material into the dentinal tubules.
Table 2.
Means and (standard deviations) of the factor dentinal tubules filled with adhesive and core material of the four investigated post-and-core systems.
Table 3.
Means and (standard deviations) of the factor bond strength of labeled specimens of the four investigated post-and-core systems.
Table 4.
Means and (standard deviations) of the factor bond strength of unlabeled specimens of the four investigated post-and-core systems.
Table 5.
Failure modes of the labeled (fluorescent dyes) investigated materials analyzed using stereomicroscope (A = adhesive between core material and dentin, M = mixed failure, AP = adhesive between post and core material, C = cohesive inside the post) and CLSM (C HL = cohesive inside the hybrid layer, A HL = adhesive between hybrid layer and core material, CC = cohesive inside the core material, AP = adhesive between post and core material).
Table 6.
Failure modes of the unlabeled investigated materials analyzed using stereomicroscope (A = adhesive between core material and dentin, M = mixed failure, AP = adhesive between post and core material, C = cohesive inside the post) and occurrence of voids in labeled and unlabeled specimens for the investigated materials.
Figure 3.
CLSM analyses of the adhesive failure mode between dentine and adhesive system.
A: Prebond/Luxabond A&B/Luxacore Z before the push-out test, the application of Prebond and Luxabond A&B consecutively resulted in two different green shades inside the hybrid layer. B: Same specimen and location after the push-out test revealed a cohesive failure inside the hybrid layer and fractures of resin tags filled with core material. C: Futurabond DC/Rebilda DC before the push-out test. D: Same specimen and location after the push-out test demonstrated an adhesive failure between hybrid and adhesive layer and the resin cement.