Fig. 1

Scanning electron microscopy (SEM) micrographs of dentin slices. a SEM image (×1000) of Group A after treatment for 21 days; b SEM image (×1000) of Group B after treatment for 21 days; c SEM image (×1000) of Group C after treatment for 21 days; d SEM image (×1000) of a demineralized dentin slice in Group D; e SEM image (×1000) of a natural dentin slice in Group E; f SEM image of a demineralized dentin slice (×15,000); g SEM image (×15,000) of Group B after treatment for 7 days; h SEM image (×15,000) of Group B after treatment for 14 days; (i) SEM image (×15,000) of Group B after treatment for 21 days. The rectangular area represents the occluded area of dentin tubules, the circular area is the unoccluded area of dentin tubules, and the area indicated by the arrow is the remineralized material