Skip to main content Accessibility help
×
Home

Ultrastructural study of the relationship between the morphogenesis of filiform papillae and the keratinisation of the lingual epithelium in the rat

  • S. IWASAKI (a1), H. YOSHIZAWA (a2) and I. KAWAHARA (a2)

Abstract

Tongues were removed from rat fetuses on d 16 of gestation (E16) and from newborn (P0) and juvenile rats on d 7 (P7) and d 21 (P21) postnatally for examination by light and transmission electron microscopy. In the fetuses at E16, no rudiments of filiform papillae were visible on the dorsal surface of the tongue. No evidence of keratinisation could be recognised over the entire dorsal lingual epithelium. At P0, rudiments of filiform papillae showed a similar distribution to that seen in the adult, but had a more rounded appearance. The columnar structure of cells in the epithelium, with the different degrees of keratinisation as observed in the mature adult, was indistinct, but a keratinised layer was clearly located at the tip of each filiform papilla. In juveniles at P7, the filiform papillae on the anterior part of the tongue were long and slender, and the anterior and posterior cell columns of the filiform papillae and the interpapillary cell columns were clearly distinguishable. In juveniles at P21, the structure of filiform papillae was identical to that in the adult. These results indicate that, in rats, the morphogenesis of filiform papillae advances in parallel with keratinisation of the lingual epithelium from just before birth to a few weeks after birth.

Copyright

Corresponding author

Correspondence to Dr Shin-ichi Iwasaki, Advanced Research Centre, The Nippon Dental University School of Dentistry at Niigata, 1–8 Hamaura-cho, Niigata 951-8580, Japan. Tel: +81-25-267-1500 (ext. 447); fax: +81-25-267-1134; e-mail: iwasaki@ngt.ndu.ac.jp

Keywords

Type Description Title
PDF

 PDF (1.6 MB)
1.6 MB

Ultrastructural study of the relationship between the morphogenesis of filiform papillae and the keratinisation of the lingual epithelium in the rat

  • S. IWASAKI (a1), H. YOSHIZAWA (a2) and I. KAWAHARA (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.