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Figure 2. Representative transmission electron micrographs of silver-impregnated and non-impregnated bonded interfaces. (A,B) Specimens primed with 35 vol% HEMA in water. (A) Stained demineralized specimen. (B) Unstained, non-demineralized specimen immersed in silver nitrate. (C,D) Specimens primed with 35 vol% HEMA in methanol. (C) Stained demineralized specimen. (D) Unstained, non-demineralized specimen immersed in silver nitrate. (E,F) Specimens primed with 35 vol% HEMA in ethanol. (E) Stained, demineralized specimen. (F) Unstained, non-demineralized specimen immersed in silver nitrate. (G,H) Specimens primed with 35 vol% HEMA in propanol. (G) Stained, demineralized specimen. (H) Unstained, non-demineralized specimen immersed in silver nitrate. For all figures: CA = adhesive layer; D = demineralized dentin; U = undemineralized dentin; H = hybrid layer; ER = embedding resin infiltrated at a fractured site above the hybrid layer, which occurred during specimen preparation; and Pointer = interfibrillar spaces.
