Résumé
The main objective of endodontic therapy is complete obturation of the root canal system after it has been adequately prepared and sterilised. A wide variety of root canal sealers are available for obturation of the root canal system. A number of different invitro methods have been used to evaluate the sealing ability of endodontic filling materials. By combining one or two tests it may be possible to obtain information about sealing ability of the test material. Therefore, the present invitro study compared the sealing ability of three different root canal sealers, namely Sealapex, AH-26 and ZnOE by two different methods, bacterial leakage and dye penetration. The results showed that AH-26 has the maximum sealing ability followed by Sealapex and ZnOE.
Sujets)
Bismuth/composition chimique , Hydroxyde de calcium/composition chimique , Chimie physique , Loi du khi-deux , Percolation dentaire , Association médicamenteuse , Résines époxy , Humains , Test de matériaux , Méthénamine/composition chimique , Phénomènes chimiques , Produits d'obturation des canaux radiculaires/composition chimique , Obturation de canal radiculaire/méthodes , Salicylates/composition chimique , Argent/composition chimique , Propriétés de surface , Titane/composition chimique , Ciment eugénol-oxyde zinc/composition chimiqueRésumé
Amalgam remains unchallenged as a posterior restorative material. But its inability to bond to the teeth leads to some amount of microleakage at the restoration-tooth interface with associated problems such as post operative sensitivity, pulpal complications etc. Also a broken amalgam restoration requires replacement which will further weaken the tooth structure. Recently, 4-META has been introduced which can graft amalgam and composite to enamel, dentin and old amalgam restorations. In this study, the bonding and marginal sealing abilities of 4-META was assessed both at the tooth-amalgam interface and old amalgam fresh amalgam interface.