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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: J Struct Biol. 2012 Dec 20;181(3):207–222. doi: 10.1016/j.jsb.2012.12.005

Figure 2. Scanning electron micrographs (SE detector at 10.00 kV) showing the tubular structure of healthy and carious samples.

Figure 2

Reactionary dentin (Rd) displays fewer tubules with constrictions and irregular shapes. (A) A low magnification view (X400) of a fresh fracture of a healthy dentin sample in longitudinal section. Scale bar 20 µm. (B) A low magnification view (X400) of a carious sample reveals the different structure in the area of affected physiological dentin (APd) compared to reactionary dentin (Rd). Scale bar 20 µm. (C) A high magnification view (X1,200) of the boundary between APd and Rd of the boxed area in B. Scale bar 20 µm. (D) A high magnification view (X2,500) of the morphology of Pd. Scale bar 2 µm. (E) A high magnification view (X2,500) of the morphology of Rd. Scale bar 2 µm.