Fig. 2. Hematoxylin and eosin staining of sagittal (A-C) and coronal (D-F) sections of the vole molar. (A) Sagittal section of entire first vole molar (B) Higher magnification of the posterior cervical loop area of the vole molar. (C) Higher magnification of the anterior region showing the anterior root domain. (D) Coronal section of the vole molar showing the location of the three root domains (boxed). (E-G) Higher magnifications of the root domains. a, anterior; p, posterior; am, ameloblasts; pod, preodontoblasts; od, odontoblasts; pdl, periodontal ligament; cem, cementum; hers, hertwig's epithelial root sheath; en, enamel; dn, dentin; mes, mesenchyme; sr, stellate reticulum; si, stratum intermedium; iee, inner enamel epithelium; oee, outer enamel epithelium. Arrows in A indicate the intercuspal loops. Asterisk in C indicates Hertwig's epithelial root sheath. A and C are from 5 dpn tissue, B,D,E,F,G are from 14 dpn tissue. Scale bars are 0.2 mm. The boxes in A indicate the areas magnified in B and C and the boxes in D indicate those in E-G.

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