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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Endod Topics. 2013 Jun 23;28(1):51–60. doi: 10.1111/etp.12035

Fig. 3.

Fig. 3

Histology of a section of extracted revitalization tooth #9. (a) Loose connective tissue with few collagen fibers has filled the canal space up to the coronal MTA plug (hematoxylineosin). (b) High magnification of the square in (a) (the apical root canal). Flattened odontoblast-like cells line the predentin (solid arrows). Many blood vessels filled with red blood cells (open arrows). No mature nerve-like bundles along the blood vessels are observed. Most cells are spindle-shaped. (c) High magnification of the rectangle in (a) (the apical foramen). There are fewer blood vessels (arrow) and cellular components at the apical foramen than in the canal. (d) High magnification of the square in (c) (part of the root apex). Layers of epithelial-like Hertwig’s epithelial root sheath (arrow) surround the root apex. Spaces in the tissue are artifacts caused by histological preparation. Adapted with permission from Shimizu et al., 2012 (20).