background: the incidence of dentinal defects may infl uence the outcome of root canal treatment. the aims of this study were to evaluate and compare the incidence of dentinal defects following root canal obturation with two different techniques. materials and methods: a total of 110 mesial roots of human mandibular fi rst molars were selected. twenty-seven roots were left unprepared as negativ...

introduction: various materials and methods have been recommended for successful root canal obturation. the aim of this experimental in vitro study was to compare the sealing ability of three root canal sealers ah-26, glass ionomer cement (gic) and zinc oxide eugenol (zoe) in single gutta-percha obturating system. methods and materials: seventy extracted single-rooted human teeth were decoronat...

The primary purposes of this study were to compare the quality (length and density) and efficiency (time to completion) of obturation when single- or multiple-cone obturation techniques were used by graduating dental school students on previously instrumented single-canalled teeth using simulated clinical conditions in vitro. Five students took part in the study, each of whom obturated thirty-s...

Background: Gastric varices (GV) bleed less frequently than esophageal however, gastric variceal bleeding is more severe with higher mortality and rebleeding rates. Treatment of (GVB) by tissue adhesive mainly cyanoacrylate glues has been used for obturation.  We aimed to determine predictors early in patients the first attack GVB. Materials methods: The study included 120 a GVB.The subjected t...

For successful endodontics, major emphasis is placed on judicious instrumentation, microbial control and complete obturation of the root canal system. During retreatment previously endodontically treated teeth, one may encounter variety different materials, which must be removed before these objectives can achieved. The intent this article to present various methods for Gutta Percha removal fro...

The smear layer was first described by McComb in a scanning electron microscope (SEM) study. The smear layer consists of organic and inorganic substances, including fragments of odontoblastic processes, dentinal shaving, microorganisms, and necrotic materials. Presence of this smear layer prevents penetration of intracanal medication into the irregularities of the root canal system and the dent...

In order to achieve success in endodontics, major emphasis is placed on judicious instrumentation, microbial control, and complete obturation of the root canal system. During re-treatment of previously endodontically treated teeth, one may encounter a variety of different materials, which must be removed before these objectives can be achieved. The intent of this article is to present various m...

Management of a tooth with open apex is a challenge to the dental practitioners. Evaluation of the periapical healing is required in such cases by radiographic techniques. The objective of this paper was to assess the healing of a periapical lesion in a non-vital tooth with open apex treated with mineral trioxide aggregate (MTA) obturation using cone beam computed tomography (CBCT). The endodon...

This study was undertaken on 14 teeth in order to evaluate a new technique for radiation dose reduction during endodontic therapy. After examination of the preoperative film, usually available in the patient file, an apex locator (Root ZX) was used to measure the working length. Complete chemomechanical debridement was then performed, and the master cone was evaluated by a digital imaging syste...