Abstract
The location of striated border cells versus non-striated border cells during enamel maturation in the rat incisor was studied by light microscopy. Serial cross sections of the lower incisors were examined from a segment of the incisor in sections which also included the first molar tooth. In the series recorded here every cross section showed both striated and non-striated border cells. A map showing the distribution of cells on the enamel surface, as plotted from their position in each of the cross sections, reveals that the non-striated border cells traverse the enamel as oblique bands. Between the narrow bands of non-striated border cells were wide bands of striated border cells. The non-striated border cells were joined at their basal nuclear poles by contacts which appeared to separate the lateral inter-ameloblast space from the space between the papillary-ridge cells. Neither the striated border cells nor the non-striated border cells went entirely to the edge of the enamel organs. The above pattern of striated border cells and non-striated border cells is regarded to be a manifestation of the cyclical activity of maturation ameloblasts.
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- Boyde A., Reith E. J. Scanning electron microscopy of rat maturation ameloblasts. Cell Tissue Res. 1977 Mar 9;178(2):221–228. doi: 10.1007/BF00219049. [DOI] [PubMed] [Google Scholar]
- Boyde A., Reith E. J. Scanning electron microscopy of the lateral cell surfaces of rat incisor ameloblasts. J Anat. 1976 Dec;122(Pt 3):603–610. [PMC free article] [PubMed] [Google Scholar]
- Josephsen K., Fejerskov O. Ameloblast modulation in the maturation zone of the rat incisor enamel organ. A light and electron microscopic study. J Anat. 1977 Sep;124(Pt 1):45–70. [PMC free article] [PubMed] [Google Scholar]
- Kallenbach E. Electron microscopy of the papillary layer of rat incisor enamel organ during enamel maturation. J Ultrastruct Res. 1966 Mar;14(5):518–533. doi: 10.1016/s0022-5320(66)80079-5. [DOI] [PubMed] [Google Scholar]
- Kallenbach E. Fine structure of rat incisor ameloblasts during enamel maturation. J Ultrastruct Res. 1968 Jan;22(1):90–119. doi: 10.1016/s0022-5320(68)90051-8. [DOI] [PubMed] [Google Scholar]
- Kallenbach E. Fine structure of rat incisor enamel organ during late pigmentation and regression stages. J Ultrastruct Res. 1970 Jan;30(1):38–63. doi: 10.1016/s0022-5320(70)90063-8. [DOI] [PubMed] [Google Scholar]
- MARSLAND E. A. A histological investigation of amelogenesis in rats. I. Matrix formation. Br Dent J. 1951 Nov 20;91(10):251–261. [PubMed] [Google Scholar]
- Moe H. Physiological cell death of secretory ameloblasts in the rat incisor. Cell Tissue Res. 1979 Apr 12;197(3):443–451. doi: 10.1007/BF00233569. [DOI] [PubMed] [Google Scholar]
- REITH E. J. The ultrastructure of ameloblasts during matrix formation and the maturation of enamel. J Biophys Biochem Cytol. 1961 Apr;9:825–839. doi: 10.1083/jcb.9.4.825. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Reith E. J., Boyde A. A correlated scanning and transmission electron microscopic study of maturation ameloblasts in developing molar teeth of rats. Cell Tissue Res. 1979 Apr 12;197(3):421–431. doi: 10.1007/BF00233567. [DOI] [PubMed] [Google Scholar]
- Reith E. J. The stages of amelogenesis as observed in molar teeth of young rats. J Ultrastruct Res. 1970 Jan;30(1):111–151. doi: 10.1016/s0022-5320(70)90068-7. [DOI] [PubMed] [Google Scholar]
- Robinson C., Briggs H. D., Atkinson P. J., Weatherell J. A. Matrix and mineral changes in developing enamel. J Dent Res. 1979 Mar;58(SPEC):871–882. doi: 10.1177/00220345790580024101. [DOI] [PubMed] [Google Scholar]
- SYMONS N. B. Alkaline phosphatase activity in the developing teeth of the rat. J Anat. 1955 Apr;89(2):238–245. [PMC free article] [PubMed] [Google Scholar]
- Skobe Z., Garant P. R. Electron microscopy of horseradish peroxidase uptake by papillary cells of the mouse incisor enamel organ. Arch Oral Biol. 1974 May;19(5):387–395. doi: 10.1016/0003-9969(74)90180-0. [DOI] [PubMed] [Google Scholar]
- Smith C. E., Warshawsky H. Movement of entire cell populations during renewal of the rat incisor as shown by radoioautography after labeling with 3H-thymidine. The concept of a continuously differentiating cross-sectional segment. (With an appendix on the development of the periodontal ligament). Am J Anat. 1976 Feb;145(2):225–259. doi: 10.1002/aja.1001450206. [DOI] [PubMed] [Google Scholar]
- Warshawsky H., Smith C. E. Morphological classification of rat incisor ameloblasts. Anat Rec. 1974 Aug;179(4):423–446. doi: 10.1002/ar.1091790403. [DOI] [PubMed] [Google Scholar]