The aim of this study was to evaluate the standard quality of 1,347 root fillings performed by postgraduate students in Endodontics according to 3 radiographic quality parameters. The analyzed quality parameters included apical extension (AE), taper (TA) and homogeneity (HO), which received scores S2 (ideal standard), S1 (slight deviation) or S0 (accentuated deviation). A perfect filling (PF) r...

BACKGROUND AND PURPOSE Anteromedial "migration" of the first segment of the facial nerve canal has been previously identified in a patient with a non-Mondini-type cochlear malformation. In this study, several patients with the same facial nerve canal anomaly were reviewed to assess for the association and type of cochlear malformation. METHODS CT scans of the temporal bone of 15 patients with...

Freshwater scarcity has driven the integration of technological advancements and automation systems in agriculture order to attempt improve water-use efficiency. For irrigation canals, efficiency is, great measure, limited by performance management responsible for controlling flow delivering water farmers. Recent studies show a significant sensitivity results obtained from canal control algorit...

This study compared three methods for creating the most centered staging platform (SP) around separated instruments (SI) in curved canals. Green .04 ProFiles, notched at D(3), were separated in the apical third of 42 mesiobuccal canals of maxillary and mandibular molars. Teeth were divided into three groups. SPs were prepared in group 1 with Gates Gliddens (GG) to a size #3; group 2 with LightS...

Background and Aim: Knowledge about the root canal system variations is crucial for successful endodontic treatment. This study aimed to examine the applicability of cone-beam computed tomography (CBCT) as a substitute for the gold-standard tooth clearing technique in identification of internal anatomical variations of mandibular incisors. Materials and Methods: This in-vitro study evaluated 6...

The pressure reflectance R (omega) is the transfer function which may be defined for a linear one-port network by the ratio of the reflected complex pressure divided by the incident complex pressure. The reflectance is a function that is closely related to the impedance of the 1-port. The energy reflectance R (omega) is defined as magnitude of [R]2. It represents the ratio of reflected to incid...

the linguistic is studying the language different levels, the language is main topic  that the linguistic sisstu dying it. the linguistics has several branches,the stylistics is one of its branches that survey literary works. and stylistic phenomenon is one of the important phenomen as at linguistic studies and it study poetic language because it’s different from the common language. since the ...

AIM To develop an accurate finite element (FE) model for studying rotary endodontic instruments and to demonstrate the usefulness of the FE method in improving the knowledge of the mechanical behaviour of these instruments during root canal preparation. METHODOLOGY An accurate geometrical model of a Ni-Ti ProTaper F1 instrument was created. The interaction between the rotating instrument and ...

PURPOSE The aim of this audit was to evaluate the technical quality of undergraduate de novo endodontic competence cases in the Dublin Dental University Hospital (DDUH) compared to European standards. MATERIALS AND METHODS A radiographic analysis of the number of canals in student 'competence' cases (completed 2009-2010) that met the accepted technical criteria for an ideal root canal treatme...