Root Canal Preparation and Enlargement Using Thermally Treated Nickel-Titanium Rotary Systems in Curved Canals

2020 ◽  
Vol 46 (11) ◽  
pp. 1758-1765
Author(s):  
Mariana Mena Barreto Pivoto-João ◽  
Mario Tanomaru-Filho ◽  
Jader Camilo Pinto ◽  
Camila Galletti Espir ◽  
Juliane Maria Guerreiro-Tanomaru
Keyword(s):  
Root Canal ◽  
Nickel Titanium ◽  
Root Canal Preparation ◽  
Thermally Treated

scholarly journals A microcomputed tomography evaluation of the shaping ability of three thermally-treated nickel-titanium rotary file systems in curved canals

2018 ◽  
Vol 47 (1) ◽  
pp. 325-334 ◽  
Author(s):  
Zhuwei Huang ◽  
Jingjing Quan ◽  
Jia Liu ◽  
Wen Zhang ◽  
Xiaolei Zhang ◽  
...  
Keyword(s):  
Root Canal ◽  
File Systems ◽  
Microcomputed Tomography ◽  
Nickel Titanium ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Before And After ◽  
Shaping Ability ◽  
Thermally Treated

Objective To evaluate the shaping ability of three thermally-treated rotary nickel-titanium (NiTi) systems including ProTaper Next (PTN), HyFlex™ CM (HFCM) and HyFlex™ EDM (HFEDM) during root canal preparation in simulated root canals. Methods A total of 45 simulated root canals were divided into three groups ( n = 15) and prepared with PTN, HFCM or HFEDM files up to size 25. Microcomputed tomography (microCT) was used to scan the specimens before and after instrumentation. Volume and diameter changes, transportations and centring ratios at 11 levels of the simulated root canals were measured and compared. Results HFEDM caused significantly greater volume increases than HFCM and PTN in the entire root canal and in the apical and middle thirds. HFCM removed the least amount of resin in the coronal third compared with HFEDM and PTN. Overall, HFCM caused significantly less transportation in the apical 2 mm and was better centred than PTN in the apical 3 mm. Conclusion Under the conditions of this study, all systems prepared curved canals without significant shaping errors and instrument fracture. PTN and HFCM cut less resin than HFEDM. HFCM stayed centred apically and cut the least material coronally.

Dynamic Torque and Vertical Force Analysis during Nickel-titanium Rotary Root Canal Preparation with Different Modes of Reciprocal Rotation

2017 ◽  
Vol 43 (10) ◽  
pp. 1706-1710 ◽  
Author(s):  
Daisuke Tokita ◽  
Arata Ebihara ◽  
Miki Nishijo ◽  
Kana Miyara ◽  
Takashi Okiji
Keyword(s):  
Root Canal ◽  
Nickel Titanium ◽  
Vertical Force ◽  
Force Analysis ◽  
Root Canal Preparation

scholarly journals Ultrastructural analysis of the surface changes on the nickel-titanium endodontic instruments after multiple use

2021 ◽  
Vol 38 (3) ◽  
pp. 291-298
Author(s):  
Nenad Stošić ◽  
Jelena Popović ◽  
Marija Anđelković-Apostolović ◽  
Aleksandar Mitić ◽  
Marija Nikolić ◽  
...  
Keyword(s):  
Root Canal ◽  
Surface Defects ◽  
Clinical Work ◽  
Sem Analysis ◽  
Nickel Titanium ◽  
Multiple Use ◽  
Root Canal Preparation ◽  
Flat Surfaces ◽  
Before And After ◽  
High Flexibility

One of the primary goals in endodontics is efficient cleaning and shaping of the root canal while maintaining its original configuration. Numerous studies highlight the advantage of using nickel-titanium instruments and the most important is their high flexibility and the ability to penetrate the curved canals. The aim of this study was to analyze the ultrastructure of the surface of nickel-titanium endodontic files before and after use. Eighty-four instruments were included in this study. The instruments were used one, three and six times for root canal preparation on extracted upper premolars. The analysis was performed based on the number of uses and the size of the instruments. Changes on flat surfaces in the grooves of the instruments, defects of the cutting edges and fractures were evaluated. The surface ultrastructure was analyzed on a scanning electron microscope (SEM). SEM analysis showed irregularities on the surfaces of the new instruments. Surface defects and damage of the cutting edges were present after the first use. After three uses, the damage was more evident in instruments of all sizes. After six uses, all instruments showed damage of the cutting edges, and a significant number of fractures were observed. Irregularities on the working parts are already noticed on the new endodontic instruments and originate from the production process. The first signs of damage appear after the first use. In order to prevent errors in clinical work during root canal preparation, it is recommended that the number of instruments uses should be limited.

scholarly journals Root canal preparation techniques using nickel-titanium rotary instruments

2005 ◽  
Vol 58 (3-4) ◽  
pp. 203-207
Author(s):  
Tatjana Brkanic ◽  
Slavoljub Zivkovic ◽  
Milan Drobac
Keyword(s):  
Root Canal ◽  
Apical Part ◽  
Nickel Titanium ◽  
Endodontic Treatment ◽  
Root Canal Preparation ◽  
Canal System ◽  
Rotary Instruments ◽  
Dental Practitioners ◽  
Root Canal System ◽  
Preparation Techniques

Introduction The main purpose of endodontic treatment is to clean the root canal system, eliminate the infected and toxic contents, and shape it in order to get a tridimensional obturation. The aim of this paper is to inform dental practitioners about crown-down techniques for root canal preparation using nickel-titanium rotary instruments. Root canal preparation Today most endodontists believe that root canal preparation is more officious, cleaning and shaping are better, if pre-enlargement of coronal two thirds is performed first, and shaping of the apical part later. Machine driven rotary instruments provide much quicker and better root canal preparation. Conclusion Contemporary endodontic rotary files vary in regard to their taper, cutting blades, guiding tip and material they are made of. The usage of rotary nickel-titanium files adds a new quality to root canal preparation.

scholarly journals A Novel Root Canal Preparation Technique Hybridizing Heat-treated Nickel-Titanium Rotary Instruments

2021 ◽  
Vol 12 (3) ◽  
pp. 258-262
Author(s):  
Shilpa Bhandi ◽  
Gianluca Gambarini ◽  
Marco Seracchiani ◽  
Luca Testarelli ◽  
Dario Di Nardo ◽  
...  
Keyword(s):  
Root Canal ◽  
Nickel Titanium ◽  
Preparation Technique ◽  
Root Canal Preparation ◽  
Heat Treated ◽  
Rotary Instruments
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