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Representative SEM images of fractured ceramic specimens. (a) Facture (dashed lines) occurred within the cemented area in the negative control (NC) group. ((b) and (c)) Fracture occurred (dashed lines) beyond the initial cemented surface in Single Bond Universal (SBU) and pure-saline positive control (PC) groups. The arrowheads show the resin cement remnants on the fractured ceramic (FC). Magnification: 200x.
