نتایج جستجو برای: five root canals

تعداد نتایج: 535617  

Journal: :International endodontic journal 2013
M E L Machado C K Nabeshima M F P Leonardo F A S Reis M L B Britto S Cai

AIM To compare the bacterial reduction achieved with reciprocating and rotary systems during root canal preparation. METHODOLOGY Sixty distobuccal root canals of maxillary molars were contaminated with Enterococcus faecalis broth culture. After an incubation period of 21 days, bacterial samples were collected and cultured on m-Enterococcus agar plates. The root canals were divided into five g...

Journal: :International endodontic journal 1999
S al-Nazhan

AIM The aim of this in-vivo study was to assess the incidence of three roots and four root canals in clinical cases of root-treated mandibular first molars in a Saudi Arabian population. METHODOLOGY A clinical study of 251 root-canal treated permanent mandibular first molars was conducted. The teeth were examined clinically and radiographically. RESULTS The results showed that 5.97% of the ...

2014
Haridoss Selvakumar Swaminathan Kavitha Rajendran Bharathan Jacob Sam Varghese

A thorough knowledge of root canal anatomy and its variation is necessary for successful completion of root canal procedures. Morphological variations such as additional root canals in human deciduous dentition are rare. A mandibular second primary molar with more than four canals is an interesting example of anatomic variations, especially when three of these canals are located in the distal r...

2015
Orlando Aguirre Guedes Marcus Vinícius Corrêa da Costa Maura Cristiane Gonçales Orçati Dorilêo Helder Fernandes de Oliveira Fábio Luis Miranda Pedro Matheus Coelho Bandeca Álvaro Henrique Borges

BACKGROUND This study investigated procedural errors made during root canal preparation with nickel-titanium (NiTi) instruments, using cone beam computed tomography (CBCT) imaging method. MATERIALS AND METHODS A total of 100 human mandibular molars were divided into five groups (n = 20) according to the NiTi system used for root canal preparation: Group 1 - BioRaCe, Group 2 - K3, Group 3 - Pr...

2016
Zahed Mohammadi Saeed Asgary Sousan Shalavi Paul V. Abbott

One of the main causes of endodontic treatment failure is the clinician's inability to localize all the root canals. Due to the complex anatomy of the root canal system, missed canals are not uncommon. There are several strategies to decrease the possibility of missed root canals starting with good pre-operative radiographies. In order to overcome the limitations of conventional radiographies, ...

Journal: :Journal of endodontics 2009
Flares Baratto Filho Suellen Zaitter Gisele Aihara Haragushiku Edson Alves de Campos Allan Abuabara Gisele Maria Correr

The success of endodontic treatment depends on the identification of all root canals so that they can be cleaned, shaped, and obturated. This study investigated internal morphology of maxillary first molars by 3 different methods: ex vivo, clinical, and cone beam computed tomography (CBCT) analysis. In all these different methods, the number of additional root canals and their locations, the nu...

Introduction: To achieve a successful endodontic treatment, the clinician has to identify the different canal configurations.mandibular premolars have the wide variety of root canal morphology and they are known as the most difficult teeth to treat in endodontics.CBCT  provides a non-invasive 3D confirmatory diagnosis as a complement to conventional radiography.The aim of this study was to...

Ali Bagherpour Maryam Gharechahi Mina Zarei Neda Naghavi Zahra Owsati

Introduction: Statement of the Problem: Cleaning and shaping are regarded as the most important aspects of root canal therapy and prerequisite for the success of endodontic treatment. Apical transportations can jeopardize the outcome of treatment due to the significant decrease in the sealing ability of root filling material. The purpose of this study was to evaluate transportation in type II c...

2014
Masoud Parirokh Paul V. Abbott Mohammad Hosein Yosefi Hamid Reza Hosseini

Most mandibular second molars have one and two canals in distal and mesial roots, respectively. This report represents four cases of mandibular second molars with a single mesial and two distal root canals with two different canal configurations. After access cavity preparation, two teeth had one distal and two mesial orifices, whereas in the two other teeth one mesial and two distal orifices w...

Journal: :Brazilian oral research 2015
Arnaldo Sant'Anna-Junior Juliane Maria Guerreiro-Tanomaru Roberta Bosso Martelo Guilherme Ferreira da Silva Mário Tanomaru Filho

The aim of this study was to evaluate the ability of gutta-percha and a thermoplastic synthetic polymer (Resilon) to fill simulated lateral canals, using warm vertical compaction. Forty-five single-rooted human teeth were prepared using the rotary crown-down technique. Artificial lateral canals were made at 2, 5, and 8 mm from the working length (WL) in each root. The specimens were divided int...

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