The structure and function of periodontal ligament cells in acellular cementum in rat molars

Citation
T. Yamamoto et al., The structure and function of periodontal ligament cells in acellular cementum in rat molars, ANN ANATOMY, 180(6), 1998, pp. 519-522
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Experimental Biology
Journal title
ANNALS OF ANATOMY-ANATOMISCHER ANZEIGER
ISSN journal
0940-9602 → ACNP
Volume
180
Issue
6
Year of publication
1998
Pages
519 - 522
Database
ISI
SICI code
0940-9602(199812)180:6<519:TSAFOP>2.0.ZU;2-G
Abstract
To elucidate the structure and function of periodontal ligament cel:ls at t he periodontal ligament-cementum interface in advanced acellular cementogen esis, the cervical regions of molars in rats aged 6 weeks were observed by light and electron microscopy. The light and transmission electron microsco py showed the periodontal ligament cells to be elongated between dense, wel l-developed principal fibers. The transmission and scanning electron micros copy showed that these cells extended wing-like projections from the latera l surface, forming cylindrical compartments surrounding the principal fiber s. In addition, finger-like projections extended toward the cementum from t he cementum-facing ends. The main results suggest the following: at the per iodontal ligament-cementum interface, the periodontal ligament cells mainta in the architecture of the principal fibers by means of extracellular compa rtments. The arrangement of fingerlike projections results in the formation of acellular cementum containing only Sharpey's fibers as a fibrous compon ent.