Comparative evaluation of reinforcing effect of three different intra-orifice barriers on pericervical dentin of endodontically treated teeth: An study.

Aims: The purpose of this study was to evaluate and compare the fracture resistance of endodontically treated teeth using three different intra-orifice barriers.

Settings And Design: This study was conducted at the department of conservative dentistry and endodontics, an study.

Subjects And Methods: Forty freshly extracted single-rooted mandibular bicuspids ( = 40) were decoronated to obtain a 14-mm standard root length and all the canals were enlarged with ProTaper up to size F3 and they were obturated with gutta-percha using AH Plus sealer and randomly divided into 4 groups ( = 10).

Comparative evaluation of apical extrusion of intracanal bacteria using ProTaper Next, Mtwo, and ProTaper rotary systems: An study.

Aim: The aim of this study was to evaluate the number of intracanal bacteria extruded apically after instrumentation with three different nickel-titanium rotary instruments.

Materials And Methodology: Forty freshly extracted mandibular premolars were selected, access cavities were prepared, and the teeth were mounted in the bacterial collection apparatus. Root canals were contaminated with a suspension of and incubated for 24 h at 37°C.

Scanning electron microscopy (SEM) evaluation of sealing ability of MTA and EndoSequence as root-end filling materials with chitosan and carboxymethyl chitosan (CMC) as retrograde smear layer removing agents.

Aim: The purpose of this study was to evaluate the sealing ability of mineral trioxide aggregate (MTA) and EndoSequence with chitosan and carboxymethyl chitosan (CMC) as retrograde smear layer removing agents using scanning electron microscopy (SEM).

Materials And Methods: Forty human single rooted teeth were taken. Crowns were decoronated and canals were obturated.