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(A): SEM images of E. faecalis cells adhered to the dentin surface; (a) control samples at 4000× and (b–d) GO coated dentin disks at 4000×. (B): SEM images of E. faecalis cells adhered to the dentin surface; (a) control samples at 2000× and (b–d) GO coated dentin disks at 2000×.
