Comparison of the coronal seal ability of different restorative materials used in orifice sealing of endodontically treated root canals

Aim of study: to compare the ability of four restorative materials (MTA - Composite - Zinc Phosphate - Glass Ionomer Cement) in coronal sealing of the endodontically treated root canal orifice in extracted teeth. Materials and Methods: 60 extracted teeth with single canal were chosen. X-Ray Images were taken, then their crowns were cut off by using diamond disc, then the canals were classically prepared, after that, they were filled with Zinc Oxide Eugenol Cement and the gutta-percha cones using Lateral Condensation technique. They were left for (24) hours in order to ensure the quite hardening of the filling material. After that, the filling material was removed vertically by using an eraser tool up to a depth of (2) mm inside the root canal. Then, the teeth were randomly divided into four groups, each contained (15) teeth (n1=n2=n3=n4=15). The entry orifices of all the teeth were filled with one of the restorative materials. The teeth were coated with Varnish except for 1 mm around orifices, After then, they were immersed in Methylene Blue Dye of 2 % for five minutes. After that, the teeth were washed under a stream of plentiful water and left to dry. Longitudinal sections were made in the buccal lingual direction. Then the sections were examined under the optical magnifier to measure the liner dye leakage using a millimeter ruler designed by “AutoCAD 2013” Program.

A comparison of sealing ability of amalgam, MTA,and bioaggregate when used as retrograde filling materials: An in-vitro study

The apical seal, which is achieved by application of a retrograde filling material, is considered one of the importan t elements in healing of the periapical lesions after apicectomy operations.The aim of this study was to compare the apical sealing ability of amalgam, MTA,and Bioaggregate when used as retrograde filling materials.

An In Vitro Study to Evaluate the Quality of Root Canal Filling of (MTA) and (PC)

The quality of root canal filling is considered the key of the successful endodontic treatment, because the one of goals of root canal obturation is to obtain three-dimensional and complete sealing. Therefore, The aim of this in vitro study was to evaluate the quality of root canal filling of White-colored Mineral Trioxide Aggregate (WMTA) and Gray-colored Portland Cement (GPC).