The aim of the present in-vitro study was to evaluate and compare the apical microleakage of Retroplast, Ketac-N100 and heat burnished gutta-percha before and after post space preparation using fluid filtration system. A total of 60 freshly extracted human maxillary anterior teeth were decoronated to obtain a uniform length of 15 mm. each. Mean microleakage of all three materials before and aft...

This in vitro study aims to evaluate the sealing ability of gutta percha root filling used with mineral trioxide aggregate [MTA], and zinc-oxide eugenol as sealer. Thirty freshly extracted single-roote teeth were selected, decoronated and then instrumented. Samples were randomly divided into five experimental groups. In group 1, root canals were filled using single cone gutta percha technique, ...

INTRODUCTION Retreatment is performed in teeth with unsuccessful root canal therapy or persistent apical lesion. The most important factor for achieving successful retreatment is thorough cleaning and reshaping. NiTi files and rotary instruments are widely used for the removal of obturatants. This study compared the ability of Mtwo and D-RaCe retreatment systems to remove residual gutta-percha ...

CONTEXT The study assesses the apical sealing ability of two obturating materials (resilon and gutta-percha) with their sealants by means of the dye penetration method using India ink. AIMS To compare the resistance to apical dye penetration between resilon (with Epiphany sealer; Epiphany, Pentron clinical technologies, USA) and gutta-percha (with AH Plus sealer; Dentsply, Maillefer, Germany)...

This study was done to evaluate new manufactured rotary spreaders one made from stainless steel material and second from nickel titanium and compared them with conventional finger spreader for their affect on the amount of gutta percha (in mg) that can be applied to fill the root canal and evaluation of apical extension of first, second, third and fourth auxiliary gutta percha cones for the sta...

OBJECTIVE Microleakage continues to be a main reason for failure of root canal therapy, where the challenge has been to achieve an adequate seal between the internal tooth structure and the main obturation material, gutta-percha. The Resilon/Epiphany (R/E) system uses a new obturation material that bonds chemically with the internal tooth structure, thereby decreasing the possibility of microle...

The quality of apical seal with regard to the length of remaining gutta-percha following post-space preparation is still controversial. The purpose of this in vitro study was to compare three different lengths of remaining gutta-percha for apical seal after post-space preparation. A total of 126 single-rooted extracted maxillary human anterior teeth with intact apices, straight roots, and witho...

In the present study, the author’s previous experimental investigations on the vortex induced vibration of uniform and tapered circular cylinders are numerically simulated. The circular cylinders have medium mass ratios (5.93, 6.1), low mass-damping parameters (0.0275, 0.0279) a mean diameter of 0.028m and an aspect ratio of about 14. A fully coupled two-way fluid-structure interaction (FSI) an...

The effectiveness of a material to adequately seal the root canal space is related to its physical properties and handling characteristics. Since the introduction of the warm vertical compaction technique, the thermoplastic compaction of canal spaces has been broadly advocated. Warm gutta percha can be easily Rheological characterization of thermoplasticized injectable gutta percha and resilon

This in vitro study evaluated the sealing efficacy of three root-filling systems/techniques in preventing bacterial leakage. Instrumented single-rooted root segments were filled with (1) warm vertical compaction with gutta-percha/AH Plus; (2) single-cone technique with ActiV GP; and (3) single-cone technique with Gutta-Flow. A dual-chamber leakage model using S. mutans as a microbial marker was...