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. 2015 Jun 18;48(3):95–101. doi: 10.1267/ahc.15006

Fig. 1. .

Fig. 1. 

H&E-stained sections showing a 35-day-old rat maxillary first molar. (A) Full view of the tooth. Asterisk indicates a mesial root. Bar=0.5 mm. (B) Magnification of boxed area in A. Two lines demarcate sections 1 to 3. Arrow and asterisk indicate Hertwig’s epithelial root sheath and cellular cementum, respectively. The intact epithelial sheath bends towards the dental pulp (DP). PL, periodontal ligament; AB, alveolar bone. Bar=50 μm. (C) Section 1. Intact epithelial root sheath (between arrows) demarcates dental follicle (DF) and dental papilla (DP). Bar=10 μm (common in C–E). (D) Sections 1 and 2 are partitioned by the dotted line. In section 1, odontoblasts (black arrow) start to form dentin (asterisk). In section 2, the epithelial sheath becomes fragmented and precementoblasts (white arrows) appear. (E) Section 3. Cementoblasts (white arrows) form the initial cellular cementum (double asterisk). Some cementoblasts are embedded as cementocytes (black arrow). Cells or cellular debris (yellow arrows) are seen in the deep region of cementum.