A light microscopic study of the attachment mechanism in different kinds of adhesive lines in rat molars

Citation
Mn. Islam et al., A light microscopic study of the attachment mechanism in different kinds of adhesive lines in rat molars, ANN ANATOMY, 183(4), 2001, pp. 319-323
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Experimental Biology
Journal title
ANNALS OF ANATOMY-ANATOMISCHER ANZEIGER
ISSN journal
0940-9602 → ACNP
Volume
183
Issue
4
Year of publication
2001
Pages
319 - 323
Database
ISI
SICI code
0940-9602(200107)183:4<319:ALMSOT>2.0.ZU;2-W
Abstract
This study was designed to observe drifting molars of 70-day-old rats by li ght microscopy, and to elucidate whether there are similar attachment mecha nisms at different kinds of adhesive lines in periodontal mineralized tissu e of the rat molar region. Three kinds of adhesive lines - cement lines on resorbed alveolar bone, cement lines on resorbed roots, and cemento-dentina l junctions were examined. The two kinds of cement lines showed similar his tological and histochemical features, they were proteoglycan-rich and fiber -poor. They appeared to form on the resorbed tissue before principal fiber reattachment. After covering by new bone or by reparative cementum, the cem ent lines retained the original features. The cemento-dentinal junction sho wed features very similar to those of the cement lines. Previous studies ha ve suggested that the cemento-dentinal junctions bind the cementum and dent ine by adhesion of proteoglycans. Structural similarities suggest that ceme nt lines provide similar links between new bone and resorbed bone and betwe en resorbed root and reparative cementum. In conclusion, this study suggest s that there is one attachment mechanism for the different kinds of collage n based hard tissue in the rat molar region.