Chemical characteristics of mineral trioxide aggregate and its hydration reaction
Restorative Dentistry & Endodontics
;
: 188-193, 2012.
Article
Dans Anglais
| WPRIM
| ID: wpr-10262
ABSTRACT
Mineral trioxide aggregate (MTA) was developed in early 1990s and has been successfully used for root perforation repair, root end filling, and one-visit apexification. MTA is composed mainly of tricalcium silicate and dicalcium silicate. When MTA is hydrated, calcium silicate hydrate (CSH) and calcium hydroxide is formed. Formed calcium hydroxide interacts with the phosphate ion in body fluid and form amorphous calcium phosphate (ACP) which finally transforms into calcium deficient hydroxyapatite (CDHA). These mineral precipitate were reported to form the MTA-dentin interfacial layer which enhances the sealing ability of MTA. Clinically, the use of zinc oxide euginol (ZOE) based materials may retard the setting of MTA. Also, the use of acids or contact with excessive blood should be avoided before complete set of MTA, because these conditions could adversely affect the hydration reaction of MTA. Further studies on the chemical nature of MTA hydration reaction are needed.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Oxydes
/
Acide silicique
/
Oxyde de zinc
/
Liquides biologiques
/
Hydroxyde de calcium
/
Phosphates de calcium
/
Calcium
/
Silicates
/
Durapatite
/
Composés du calcium
langue:
Anglais
Texte intégral:
Restorative Dentistry & Endodontics
Année:
2012
Type:
Article
Documents relatifs à ce sujet
MEDLINE
...
LILACS
LIS