Introduction: Mineral trioxide aggregate (MTA) as an alternative material to gutta-percha for obturation of root canal in special cases has several drawbacks. The purpose of this study was to compare the apical sealing ability of a new MTA-based sealer versus MTA. Materials and Methods: A total of 36 canals of extracted maxillary central incisors were instrumented and randomly divided into 3...

Besides the risk of filling material extrusion throughout the apex, a satisfactory apical seal can be difficult to achieve in canals with open apices or iatrogenic enlargements of the apical constriction. These situations pose a challenge to root canal filling. This paper describes the root canal filling of a maxillary right canine with an overinstrumented apex, complete loss of the apical stop...

AIM The aim of this in vitro study was to evaluate the apical seal obtained with four root canal sealers AH 26, Sealapex, Endoflas FS and AH Plus, with lateral condensation. MATERIALS AND METHODS Sixty root canals were prepared using the step-back technique. The specimens were divided into four experimental groups of 12 teeth and two control groups of 12 teeth. The experimental groups were ob...

introduction: mineral trioxide aggregate (mta) has been suggested as an effective material for apical barrier, forming an effective seal against bacterial leakage in teeth with open apices. mta needs moisture for setting; which can come from the apical region or a moist cotton pellet. this study was intended to compare bacterial leakage in one- and two-step mta apical barrier technique in open ...

The apical third of most root canals shows some degree of curvature, which is important in cleaning/shaping and obturation during root canal treatment. The present study evaluated the effect of master cone size on the apical seal of severely curved root canals. Thirty-eight mesial roots of human mandibular first molars were prepared using the crown-down technique. All samples were mature roots ...

The dental lasers of today have benefited from field of quantum mechanics, initially formulated during the early 1900s by Danish physicist Bohr. The first laser use in endodontics was reported by Weichman & Johnson (1971) who attempted to seal the apical foramen in vitro by means of a high power-infrared (CO2) laser. In May 1990, Myers and Myers developed the first specialized dental laser (pul...

Pulp and Periradicular Pathways 2 Natural Pathways 2 Apical foramen 2 Lateral canals 4 Dentinal tubules 4 Pathological and Iatrogenic Pathways 5 Dental caries 5 Role of microorganisms 6 Root perforations 7 Root perforations during access preparation 7 Root perforations during cleaning and shaping 8 Root perforations during post space preparations 10 Vertical fracture 10 Periradicular Pathosis 1...