AIMS The aim of this study was to evaluate the shaping effects of two M-wire and two traditional nickel-titanium (NiTi) rotary systems in simulated S-shaped resin canals. SUBJECTS AND METHODS Forty simulated S-shaped canals in resin blocks were instrumented with two traditional (ProTaper, Sendoline S5) and two M-wire (WaveOne, GT series X) NiTi systems according to the manufacturers' instruct...

Objective: Aim of the present study is to evaluate mechanical properties a newly developed rotary file, AF Rotary (Fanta Dental, Shanghai, China), and compare these features with worldwide spread Protaper Gold F2 (PTG F2; Dentsply Maillefer, Ballaigues, Switzerland). Material Methods: 60 25.06 PTG were divided in three groups 20 files each. A group underwent cyclic fatigue resistance tests, sec...

By means of X-ray photoelectron spectroscopy (XPS) and differential scanning calorimetry (DSC), this study set out to investigate the application of plasma immersion ion implantation (PIII) for the surface modification of ProTaper NiTi rotary instruments. This study was undertaken because the PIII method was perceived to have the potential of developing into a standard surface modification tech...

NTRODUCTION The goals of root canal therapy are to remove infected and necrotic pulpal tissue remnants, shape the root canal system to facilitate irrigation and medication and adequate sealing using obturation materials. 1 Rotary instruments enhance the quality of obturation by providing conical shape to the root canal. Nickle titanium (NiTi) alloy instruments inherent flexibility that allows t...

Of all the procedural problems that can occur when practicing dentistry, endodontic file breakage is one dilemma that not only can lead to extreme stress for the clinician, but can cause great anxiety for the patient as well. Separated rotary nickel-titanium (NiTi) files can also pose an increased risk of post-endodontic complications. Understanding why and how endodontic file breakage occurs, ...

introduction: the aim of the present study was to compare hand stainless steel k-files and nickel-titanium profile 0.04 taper 29 series rotary instruments for their efficiency, procedural errors and time consumed in preparation of root canal system. materials and methods: a total of 46 maxillary and mandibular first premolars extracted for orthodontic purposes were collected (two contralateral ...

In recent years, thanks to the rapid advancement of science and technology a better understanding anatomy root canal system, many new endodontic instruments materials have been introduced with desire minimize complications in process preparing canal, help cleaning shaping complete well. It is noteworthy that emergence files made Nickel-Titanium alloy (NiTi files), which, according recommendatio...

PURPOSE The aim of this study was to compare the cleanliness of root canal walls after retreatment using ProTaper Next (PTN), ProTaper Universal Retreatment (PTR) nickel-titanium (NiTi) systems and Hedström hand files in curved mesial canals of mandibular molar teeth and the time required for gutta-percha and sealer removal. MATERIALS AND METHODS Ninety mandibular molar teeth with curved mesi...

Technological innovation and the modernization of manufacturing procedures have thoroughly redefined field nickel–titanium (NiTi) rotary reciprocating endodontic instruments [...]