OBJECTIVE To evaluate the effect of intracoronal bleaching agents on the sealing properties of different intraorifice barriers and root filling materials. STUDY DESIGN The root canals of extracted human premolars (n=180) were prepared by using System GT rotary files and filled with either gutta-percha+AH Plus or Resilon+Epiphany sealer. In both groups, the coronal 3mm of root filling was remo...

By means of a 3D numerical code we investigate the response of magnetic flux tubes to transverse perturbations. Various tubes with plasma β ranging from 0.1 to 10 embedded in a uniform nonmagnetic atmosphere are considered. High spatial resolution was obtained by the application of a multiple nested grid strategy. Various kinds of internal longitudinal and transverse body waves as well as surfa...

AIM The aim of this study was to compare the bacterial leakage of mineral trioxide aggregate (MTA), calciem enriched cement (CEM), and bone cement (BC) as repair materials in furcal perforations. METHODS The pulp chambers of 57 human mandibular molar teeth were accessed and the root canal orifices were located. The roots were horizontally sectioned in the middle third. Composite resin was use...

Endodontic treatment failure can be caused by a variety of factors, including bacterial persistence, improperly cleaned and obturated root canals, faulty coronal seal (leakage), untreated canals (missed canals). The presence bacteria such as Enterococcus (E.) faecalis inside the canal system is most common cause endodontic failure. These are more resistant to disinfectants, resulting in an infe...

introduction: this cross-sectional survey determined the dental prevalence of apical periodontitis (ap) in selected iranian population, and evaluated the influence of the quality of root canal treatment (rct) and their coronal restorations (cr) on the periapical status. materials and methods: a total of 1064 panoramic radiographies were evaluated by two observers during 2009. the quality of rct...

Context:
 An intraorifice barrier after endodontic therapy could remarkably mitigate the movement of bacteria and their by-products improve long-term prognosis a root canal treated teeth by serving as barriers against fluid bacterial ingress.
 Aims:
 The idea present study was to compare coronal microleakage in with 2-mm 3mm Bulkfill flowable composite, Glass Ionomer Cement (GIC)...

BACKGROUND The purpose of the present study was to evaluate and compare the sealing ability of glass ionomer cement (GIC), composite resin, gray mineral trioxide aggregate (GMTA) and white mineral trioxide aggregate (WMTA) when placed coronally as double - sealing material over gutta-percha in root canal treated teeth. MATERIALS AND METHODS A sample of 70 freshly extracted human single rooted...

The aim of this in vitro study was to compare the sealing quality of three root canal filling materials after four years of ageing. Obturation with the non-instrumentation technique (NIT) was compared with cold lateral condensation of gutta-percha. Seventy-six canals were endodontically treated with traditional hand instrumentation and cold lateral condensation (control) whereas 77 canals were ...

INTRODUCTION The failure of primary endodontic treatment is manifested by various clinical symptoms following endodontic therapy or, more frequently, by the development of chronic inflammatory process in the apex region without any subjective symptoms. In case of unfavorable outcome of the primary endodontic treatment, orthograde endodontic retreatment is the method of choice for a prolonged th...