نتایج جستجو برای: five root canals

تعداد نتایج: 535617  

Journal: :Current opinion in plant biology 1998
B Scheres T Berleth

During Arabidopsis root development, a radial pattern of tissues is extended by the meristem. These tissues form continuous layers and recent data suggest that tissue continuity is instrumental for constraining the direction of signaling in a process termed channeling. In the ground tissue, fate-determining signals originate from contiguous cells of the same layer, possibly due to specific symp...

Journal: :Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics 2011
Domenico Ricucci John Russo Michael Rutberg Josef A Burleson Larz S W Spångberg

OBJECTIVE The purpose of this prospective study was: 1) to follow-up a large number of endodontic treatments performed by a single operator, periodically checked over a 5-year period; and 2) to correlate outcome to a number of clinical variables. STUDY DESIGN This prospective study included all consecutive cases during the selected time period. All cases were followed regularly for a 5-year p...

2014
Özgür Genç Şen Sadullah Kaya Özgür Er Tayfun Alaçam

Mechanical instrumentation of root canals produces a smear layer that adversely affects the root canal seal. The aim of this study was to evaluate efficacy of MTAD and citric acid solutions used with self-adjusting file (SAF) system on smear layer. Twenty-three single-rooted human teeth were used for the study. Canals were instrumented manually up to a number 20 K file size. SAF was used to pre...

2013
Sadullah Kaya Sadullah KAYA

Aim: The aim of this study was to evaluate the effectiveness of two instrumentation and irrigant techniques in smear-layer removal from root canals. Methodology: Thirty single-rooted teeth were randomly divided into two groups. Group 1 (continuous irrigation) was prepared using Selfadjusting file, and group 2 (manual irrigation; conventional needle irrigation) was prepared using with ProTaper f...

2012
Ariane Cassia Salustiano MARINHO Frederico Canato MARTINHO Alexandre Augusto ZAIA Caio Cezar Randi FERRAZ Brenda Paula Figueiredo de Almeida GOMES

UNLABELLED Gram-negative bacteria play an essential role in endodontic infections because they have virulence factors such as endotoxin. Due to its potential cytotoxic activity, special attention has been given to the removal/neutralization of this endotoxin in the root canal system. OBJECTIVE The aim of this study was to evaluate the influence of the apical enlargement size (AES) by using ro...

Journal: :Journal of Ayub Medical College, Abbottabad : JAMC 2016
Atif Saleem Agwan Zeeshan Sheikh

Maxillary premolars exhibit variable root canal morphology, but it is quite rare to find three canals in their root system. The aim of this case report is to present the diagnosis and clinical management of a patient with anatomical variation of having three root canals in the maxillary first premolar. Three-canalled maxillary premolars are quite an endodontic challenge. A discussion is provide...

Journal: :The journal of contemporary dental practice 2011
Roberta Kochenborger Scarparo Leticia Pereira Diana Moro Grasiela Grundling Maximiliano Gomes Fabiana Soares Grecca

AIM The present report describes and discusses root canal variations in the internal morphology of maxillary molars. BACKGROUND Dental internal anatomy is directly related to all the technical stages of the endodontic treatment. Even though, in some situations a typical anatomical characteristics can be faced, and the professional should be able to identify them. CASE DESCRIPTIONS This clin...

2014
Soledad Rodríguez-Benítez Carlos Stambolsky Guelfand Milagros Martín-Jiménez Juan-José Segura-Egea

OBJECTIVES The present in vivo study was designed to assess the efficacy of 3 root canal disinfection protocols in immature dog teeth with apical periodontitis (AP). MATERIAL AND METHODS Forty immature premolars with pulp necrosis and AP of five Beagle dogs were used. Three experimental disinfection protocols were established. After irrigation with 40 ml 5.25% sodium hypochlorite using the En...

Journal: :International endodontic journal 2011
P Verma R M Love

AIM To observe the morphology of the root canal system of the maxillary first molar mesiobuccal root using micro computed tomography and compare it to current canal classifications. METHODOLOGY Twenty mesiobuccal roots were resected from randomly selected extracted human maxillary first molar teeth and prepared for scanning using a SkyScan micro CT scanner (SkyScan 1172 X-ray microtomograph, ...

2014
Tamer Taşdemir Kürşat Er Davut Çelik Erhan Tahan Ahmet Serper Kadir Tolga Ceyhanli Cemal Yeşilyurt

OBJECTIVE To assess the influence of various canal-drying techniques on the push-out bond strength between radicular dentine and both MTA Fillapex and iRoot SP sealers. MATERIALS AND METHODS Eighty extracted single-root teeth were instrumented with ProTaper Universal rotary instruments to a size F4. The teeth were randomly assigned to 1 of 4 groups as follows: group 1, excess fluid in the can...

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