Morphological cell changes due to chemical toxicity of a dental materials. An Electron microscopic study on human periodontal ligament fibroblasts and L929 cells
Al-Nazhan,, Saad . 1990
New endodontic materials with polymer bases may be more difficult to evaluate in cell cultures in vitro than conventional zinc oxide-eugenol cements. In order to study the morphological changes taking place in cells exposed to such materials, L929 cells and human periodontal fibroblasts were observed using scanning electron microscopic and transmission electron microscopic techniques. The morphological changes of the cells were correlated to the quantitative results observed simultaneously in cytotoxicity studies using the radiochromium release method. Results showed there was a relationship between the chromium release and the degree of individual cell damage. The periodontal ligament fibroblasts were more resistant to this kind of chemical injury than the L929 cells. Consequently, it may be proper to use periodontally derived cells for the study of cytotoxic mechanisms of polymer endodontic filling materials.
Aim: This study aims to evaluate the retrieval outcome of the separated endodontic instrument by endodontic
board residents.
Materials and Methods: Records of 450 endodontic cases with…
بواسطة
Saad Al‑Nazhan, Saad Al‑Nazhan, Nassr Al‑Maflehi
A revascularization procedure was shown to be the best alternative therapy for immature teeth with necrotic pulp and apical infection. A 12 year old female with a history of trauma to her upper…
Introduction: The aim of this study was to investigate the root and root canal morphology of permanent maxillary first molars in a Saudi subpopulation and the effect of age and…
بواسطة
Al-Shehri S, Al-Nazhan S, Al-Nazhan S, Shoukry S, Al-Shwaimi E, Al-Sadhan R, Al-Shemmery B