Labial surface of the maxillary central incisors of E-105.

<p>Labial surface of the maxillary central incisors of E-105a) under 20x magnification captured by digital microscope; b) composite image captured by an SEM microscope at 80x magnification. White arrows indicate the site of conchoidal fractures; black arrows indicate the pits on the enamel above the conchoidal fractures.</p>