Fig. 3.

(A, B) Micro-CT analysis showed the coronal section of the mice incisors. The enamel thickness of both types of mice showed no difference. The scale bar was 500 μm. (C, D) SEM of the coronal surface of the incisor clearly showed the enamel structure, including the inner and outer layers of the enamel. The scale bar was 100 μm. (E, F) Intensity profile of OCT images obtained from mice for in vitro scanning. The boundary of outer/inner enamel and DEJ could be clearly seen. The scale bar was 200 μm. Red arrow: Outer layer of enamel; White arrow: the whole enamel. Blue arrow: the boundary between dental tissue and air; Green dash line: Outer/inner enamel boundary. Green dotted line: DEJ. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)