نتایج جستجو برای: rotary instrumentation system

تعداد نتایج: 2251044  

M Vatanpoor, SH Assareh, Z KHalilak, Z Movasagh,

Background and Aim: The purpose of this study was to evaluate residual dentin thickness of the root and the area of the canal lumen in the coronal region of the mesiobuccal and mesiolingual canals of the lower first molars after canal preparation with the common method of using hand files and Gates Glidden drills or ProTaper rotary files, by Spiral Ct-Scan. Materials and Methods: In this exp...

Elnaz Farhodi , Shiva Sadeghi ,

Introduction: The purpose of this in-vitro study was to compare shaping ability of NiTi rotary Mtwo and FlexMaster with stainless steel hand K-Flexofile in curved root canals of extracted teeth. Materials and Methods: Mesiobuccal canals of 45 mandibular molar teeth were balanced into three groups of 15 each, with respect to the Schneider angle, canal access angle, height, dis-tance and radiu...

Journal: :Journal of endodontics 2000
G B Shuping D Orstavik A Sigurdsson M Trope

The purpose of this study was to evaluate the extent of bacterial reduction with nickel-titanium rotary instrumentation and 1.25% NaOCl irrigation. Also, the additional antibacterial effect of calcium hydroxide for >1 wk was tested. Forty-two subjects with radiographic and clinical signs of chronic apical periodontitis were recruited. The canals were sampled before treatment, during and after i...

2005
José Carlos YAMASHITA Marco Antonio Hungaro DUARTE Fernanda Araújo VALIM Juliano Milanezi

he objective of the present study was to determine, by scanning electron microscopy, the aspect of root canal walls after utilization of different rotary instrumentation systems for root canal preparation. Forty-two single-rooted and straight teeth were divided into six groups, whose root canals were prepared using the following rotary systems: groups 1 and 2 Quantec; groups 3 and 4 Pow-R; grou...

Journal: :Journal of endodontics 2009
David Uroz-Torres María Paloma González-Rodríguez Carmen María Ferrer-Luque

INTRODUCTION Nickel-titanium rotary instruments reduce procedural errors and the time required to finish root canal preparation. The goal of this study was to evaluate the effectiveness of a manual glide path on the preparation of curved root canals with Mtwo rotary system. METHODS Forty buccal root canals with angles of curvature between 25 to 76 degrees were randomly divided into 4 groups (...

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 clinical and diagnostic research : JCDR 2015
Gaurav Sharma Pooja Kakkar Asit Vats

OBJECTIVE The objective of this study was to compare the smear layer formed on root canal walls during canal preparation of extracted human teeth by Twisted, Mtwo, and ProTaper rotary nickel titanium instruments. MATERIALS AND METHODS Sixty single rooted human premolar teeth with root curvature <25(0) were selected and randomly divided into three Groups (n= 20 teeth per Group). Three types of...

2013
Bugra OZEN Ozlem Marti AKGUN Bugra Ozen Ozlem Marti Akgun

The aim of the study was to compare the manual and rotary endodontic instruments focusing on risk of perforation when the whole root canal length is instrumented as well as the time required for preparation in primary teeth Fifty four teeth were divided randomly into three groups.Group I: The root canals were prepared manually with K-files. Group II : ProTaper instruments were used in a crown-d...

Journal: :Australian endodontic journal : the journal of the Australian Society of Endodontology Inc 2008
Fernando Branco Barletta Magda de Sousa Reis Márcia Wagner Janusa Casali Borges Cristina Dall'Agnol

In this study, computed tomography (CT) was used to assess three techniques for root canal filling removal. Seventy-five roots of extracted human lower incisors were filled with zinc oxide-eugenol sealer and gutta-percha and separated into three groups before gutta-percha removal (group 1, Gates Glidden burs + K-type hand instrumentation; group 2, K-type reciprocating instrumentation + NSK TEP ...

2012
Braulio PASTERNAK-JÚNIOR Manoel Damião de SOUSA NETO Valdeci Carlos DIONÍSIO Jesus Djalma PÉCORA Ricardo Gariba SILVA

OBJECTIVE This study assessed the muscular activity during root canal preparation through kinematics, kinetics, and electromyography (EMG). MATERIAL AND METHODS The operators prepared one canal with RaCe rotary instruments and another with Flexo-files. The kinematics of the major joints was reconstructed using an optoelectronic system and electromyographic responses of the flexor carpi radial...

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