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Medicina
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Nickel-Titanium Rotary Instruments in Endodontics
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Special Issue "Nickel-Titanium Rotary Instruments in Endodontics"

A special issue of Medicina (ISSN 1648-9144). This special issue belongs to the section "Dentistry".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 4159

Special Issue Editors

Dr. Marco Seracchiani

E-Mail Website
Guest Editor
Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, Rome, Italy
Interests: endodontics; Ni-Ti instruments; cyclic fatigue resistance; torsional resistance
Dr. Maurilio D'Angelo

E-Mail Website
Guest Editor
Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, Rome, Italy
Interests: endodontics; Ni-Ti instruments; cyclic fatigue resistance; torsional resistance; paper points; green transition

Special Issue Information

Dear Colleagues,

The introduction of Ni-Ti Rotary instruments has deeply changed the approach to and the results of endodontic treatments. Despite several discoveries being obtained through the years, several things are still to be understood about Ni-Ti files and their behaviors while rotating inside the root canal. Indeed, it is not infrequent Ni-Ti instruments failure, such as untwisting or even separation. Moreover, it is still controversial both the influence of the different in vitro studies on clinical performances and the relationship between the different properties and their influences during instrumentation. The aim of the current Special Issue is to increase the knowledge about the in vitro and in vivo performances of rotary files, with the scope of increasing the safety of root canal therapy thanks to more efficient instruments and instrumentation techniques. With these premises, the need for better and more specified studies about the Ni-Ti rotary instruments in vitro and in vivo behavior is arising day after day, mainly but not only focused on better specifying the relationship between the different well-known characteristics of rotary files as well as the in vitro evaluation of the multitude of new files recently introduced on the marketplace. Last but not least, the interaction between shaping technique and both cleanness effectiveness and tooth resistance. 

Dr. Marco Seracchiani
Dr. Maurilio D'Angelo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Medicina is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Ni-Ti rotary instruments
  • cyclic fatigue resistance
  • torsional resistance
  • bending properties
  • shaping ability
  • SEM evaluation

Published Papers (3 papers)

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Research

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Article
Cleaning and Disinfecting Oval-Shaped Root Canals: Ex Vivo Evaluation of Three Rotary Instrumentation Systems with Passive Ultrasonic Irrigation
by
Ying Li
,
Zhengyang Wang
,
Pingping Bao
,
Tingting Meng
,
Meng Liu
,
Huixu Li
,
Ya Shen
,
Dayong Liu
,
Zhi Jia
and
He Liu
Medicina 2023, 59(5), 962; https://doi.org/10.3390/medicina59050962 - 16 May 2023
Cited by 1 | Viewed by 960
Abstract
Background and Objectives: Successful root canal treatment depends on the thorough removal of biofilms through chemomechanical preparation. This study aimed to investigate and compare the cleaning and disinfecting efficiency of oval-shaped root canals using XP-endo Shaper (XPS), ProTaper Next (PTN), and HyFlex [...] Read more.
Background and Objectives: Successful root canal treatment depends on the thorough removal of biofilms through chemomechanical preparation. This study aimed to investigate and compare the cleaning and disinfecting efficiency of oval-shaped root canals using XP-endo Shaper (XPS), ProTaper Next (PTN), and HyFlex CM (HCM) in combination with passive ultrasonic irrigation (PUI). Materials and Methods: Ninety extracted teeth were contaminated and randomly divided into three groups: XPS, PTN, and HCM. Each group was assigned to three subgroups: subgroup A (sterile saline), subgroup B (3% sodium hypochlorite and 17% ethylenediaminetetraacetic acid), and subgroup C (3% sodium hypochlorite, 17% ethylenediaminetetraacetic acid, and PUI). Bacterial sampling was conducted both from baseline samples and samples after chemomechanical preparation. Scanning electron microscopy (SEM) was used to evaluate the residue bacterial biofilms, hard tissue debris, and smear layers on the buccolingual walls of oval-shaped root canals. Results: When combined with sterile saline, XPS demonstrated a higher reduction of bacterial counts and was more effective in eradicating Enterococcus faecalis in the middle third of the canals compared to the other instruments (p < 0.05). Additionally, when used with antimicrobial irrigants, XPS was more effective in disinfecting the coronal third of the canals than the other instruments (p < 0.05). Furthermore, XPS reduced hard tissue debris more effectively in the middle third of canals than in the apical third (p < 0.05). Conclusions: XPS outperforms PTN and HCM in disinfecting oval-shaped root canals. Despite the fact that combining XPS and PUI improves cleaning and disinfecting, removing hard tissue debris from the critical apical area remains challenging. Full article
(This article belongs to the Special Issue Nickel-Titanium Rotary Instruments in Endodontics)
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Article
Incidence of Post-Operative Pain following a Single-Visit Pulpectomy in Primary Molars Employing Adaptive, Rotary, and Manual Instrumentation: A Randomized Clinical Trial
by
Bhagyashree Thakur
,
Anuj Bhardwaj
,
Dian Agustin Wahjuningrum
,
Alexander Maniangat Luke
,
Krishna Prasad Shetty
,
Ajinkya M. Pawar
,
Rodolfo Reda
,
Marco Seracchiani
,
Alessio Zanza
and
Luca Testarelli
Medicina 2023, 59(2), 355; https://doi.org/10.3390/medicina59020355 - 13 Feb 2023
Viewed by 1614
Abstract
Background and Objectives. To differentiate the intensity of postoperative pain after primary molar pulpectomy employing manual instrumentation versus two single-file systems with different kinetics (the XP-Endo shaper file with adaptive instrumentation vs. the Kedo-SG blue file with continuous rotation instrumentation). Materials and Methods [...] Read more.
Background and Objectives. To differentiate the intensity of postoperative pain after primary molar pulpectomy employing manual instrumentation versus two single-file systems with different kinetics (the XP-Endo shaper file with adaptive instrumentation vs. the Kedo-SG blue file with continuous rotation instrumentation). Materials and Methods. This three-arm, single-blind, randomized clinical trial included assessing 75 healthy children between 4 to 9 years who required pulpectomy for primary molars (mandibular first and second). The three groups each had an equal number of children. Children in Group 1 had their teeth instrumented with the XP-endo Shaper, children in Group 2 had their teeth instrumented with the Kedo-SG Blue file, and children in Group 3 had their teeth instrumented manually using K-files. The degree of postoperative pain was measured using a four-point pain scale at 6-, 12-, 24-, 48-, and 72-h following therapy. Each participant’s parent received five flashcards with four faces and a word characterizing each face. The data were analyzed using Kruskal–Wallis and chi-square tests. The level of significance was set to 5%. Results. During the follow-up period, there was a significant difference in postoperative pain intensity between the three groups. The XP-endo shaper was associated with considerably decreased post operative at the 6- and 12-h interval followed by Kedo-SG. The highest post-operative discomfort across the groups was related to the patients who underwent manual instrumentation. Conclusion. In comparison to rotary and manual instrumentation, postoperative pain severity was reduced with adaptive instrumentation. Full article
(This article belongs to the Special Issue Nickel-Titanium Rotary Instruments in Endodontics)
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Article
A Novel Technique for Identification of Wear Values at Different Lengths after Multiple Clinical Use of Different File Systems
by
Neslihan Yılmaz Çırakoğlu
,
Ersan Çiçek
,
Cevat Özarpa
,
Yağız Özbay
and
Olcay Özdemir
Medicina 2022, 58(8), 1117; https://doi.org/10.3390/medicina58081117 - 18 Aug 2022
Viewed by 1184
Abstract
Introduction The purpose of this research is to assess the wearing of the rotary file system (Protaper Next) and reciprocating file systems (Reciproc Blue and WaveOne Gold) at different lengths using a novel technique after in vivo clinical use. Materials and Methods Twelve [...] Read more.
Introduction The purpose of this research is to assess the wearing of the rotary file system (Protaper Next) and reciprocating file systems (Reciproc Blue and WaveOne Gold) at different lengths using a novel technique after in vivo clinical use. Materials and Methods Twelve different unused samples from each brand were accepted as reference values. For three different brands, the diameters of the files were measured by taking 12 samples used once, 12 samples used twice, and 12 samples used three times. Images were taken with a USB Micron Microscope, and file diameters were measured by determining limit values with Autocad. Result Reciproc Blue system was the most worn at apical 1 mm, and WaveOne Gold system was the most worn at apical 3 mm. PTN system exhibited the least wearing at any length. Moreover, less wearing was observed in the rotation motion than in the reciprocating motion. Conclusion In clinical practice, for the guttapercha to be fully adapted to the apical construction prepared according to the determined WL, the file should not undergo any wearing and volume reduction. Wearing—especially in the apical parts of the file—causes less preparation, and this situation could lead to apically obturation failure. Full article
(This article belongs to the Special Issue Nickel-Titanium Rotary Instruments in Endodontics)
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