نتایج جستجو برای: ti rotary systems

تعداد نتایج: 1224234  

Present work aims at multi-mechanical surface treatment of Ti-6Al-4V based-miniplate implant manufactured by electrical discharge machining (EDM) for biomedical use. Mechanical surface treatment consists of consequent use of ultrasonic cleaning, rotary tumbler polishing, and brushing. Surface layers are analyzed employing scanning electron microscopy and energy dispersive X-ray spectroscopy. Al...

Journal: :Dental materials journal 2012
Igor Stojanac Milan Drobac Ljubomir Petrovic Teodor Atanackovic

The aim of this study was to examine the lifespan or number of cycles to failure of tapered rotary nickel-titanium (Ni-Ti) endodontic instruments. Simulated root canals with different curvatures were used to determine a relation between canal curvature and instrument lifespan. Using a novel mathematical model for the deformation of pseudoelastic Ni-Ti alloy, it was shown that maximum stress nee...

ژورنال: دانشور پزشکی 2008
لباف, حسین , نادرالوجود, محمدحسین , هنردار, کیامرث ,

  Background: Stainless steel instruments have long used as conventional instruments applied in root canal therapy procedures. Being difficult the canal preparation by these instruments, a new generation of nickel-titanium instruments have introduced. The aim of this study was to compare the manual Ni-Ti instruments with the Flex Master® Ni-Ti rotary system in canal preparation.   Materials & M...

Journal: :Journal of applied biomaterials & biomechanics : JABB 2009
Chiara Pirani Giovanni Feletti Roberto Cretti Giovanni Luca Acquaviva Silvia Marchionni Carlo Prati

PURPOSE The aim of this study was to compare, through scanning electron microscope (SEM), the ability of four Ni-Ti rotary instrument systems in shaping root canal walls and their ability in removing smear layer and dentin debris. METHODS Forty-six extracted single-rooted human teeth were divided into four groups and prepared to size 35 (Alpha System, FlexMaster, MFile) or 30 (NRT files). Irr...

2016
Mehmet Baybora Kayahan Tuba Ayhan Esra Pamukcu Guven Jale Tanalp

Objective: The purpose of this study was to compare the apically extruded debris during endodontic retreatment of teeth with open apices using hand instruments and rotary instruments with continuous rotation and reciprocation. Methodology: Forty-five single-rooted maxillary incisors and canines were used. The root tips were dissected and #1 Gates Glidden burs were allowed to protrude 1 mm beyon...

Journal: :journal of dentistry, tehran university of medical sciences 0
k. nazari moghaddam p. owlia a. baghalian

statement of problem: microorganisms are essential for the development of periradicular diseases and are one of the major causative factors associated with endodontic treatment failures. different instruments and preparation techniques have been developed in endodontics to eliminate or reduce intracanal bacteria. purpose: the aim of this study was to compare the amount of remaining e. faecalis ...

Ghaziani, Pari, Ghoddusi, Jamileh, Nazari, Shahrzad,

Comparison of remaining obturating material on canal walls using rotary and hand instrumentation techniques for endodontic re-treatment Dr. J. Ghoddusi*- Dr. P. Ghaziani*- Dr. Sh. Nazari** *Associate Professor of Endodontics Dept., Faculty of Dentistry, Mashhad University of Medical Sciences. **Assistant Professor of Endodontics Dept., Faculty of Dentistry, Hamedan University of Medical Science...

ژورنال: مجله دندانپزشکی 2004
آشفته یزدی, کاظم, شیخ‌رضایی, محمد سعید, عشقیار, نصرت‌اله, فرزانه, بابک,

Statement of Problem: Total removal of tissues and remnant microorganisms as well as canal shaping are the essential objectives of endodontic therapy. A successful endodontic treatment is obtained through Shilder’s principals, however complete observation of this technique using stainless steel files manually is problematic and time-consuming. Modern technology, in order to eliminate such probl...

2011
Y. S. Pyoun C. M. Suh I. H. Cho K. Y. Lee J. H. Ahn A. Cherif B. Scholtes R. Kayumov

The spine rod in the spinal fixation system should be tough enough to support the dynamic force and flexible also for flexible movement. 5.5 mm ~ 6 mm diameter spine rods made of Ti-6Al-4V ELI are common products. Two possibilities are studied. The one is that while keeping the flexibility unchanged (using 6mm diameter), how much the fatigue strength can be increased. The other is while the fle...

2010
Shruthi Nagaraja B V Sreenivasa Murthy

BACKGROUND Controlled, uniformly tapered radicular preparation is a great challenge in endodontics. Improper preparation can lead to procedural errors like transportation of foramen, uneven dentine thickness, stripping of root canal, formation of ledge, zip, and elbow in curved canals. These procedural errors and their sequel can adversely affect the prognosis of treatment. AIM/OBJECTIVES The...

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