A Novel Digital Technique to Analyze the Wear of CM-Wire NiTi Alloy Endodontic Reciprocating Files: An In Vitro Study

Faus‐Matoses, Vicente; Faus-Llácer, Vicente; Muñoz, Álvaro Aldeguer; Pérez‐Barquero, Jorge Alonso; Faus-Matoses, Ignacio; Ruiz-Sánchez, Celia; Zubizarreta-Macho, Álvaro

doi:10.3390/ijerph19063203

Cited by 5 publications

(3 citation statements)

References 41 publications

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“…However, most studies assessing instrument design have relied on information provided by manufacturers or the analyzing cross-sections and surface features [ 11 ], using stereomicroscopy [ 10 ] or scanning electron microscopy (SEM) [ 11 ]. More recently, attempts have been made to create 3D models of NiTi instruments using the non-destructive micro-CT technology [ 12 , 13 ]. However, these studies have shown that virtual models produced exhibit significant changes in design, including severely flattened cutting blades and deformations in the geometry of their tips.…”

Section: Introductionmentioning

confidence: 99%

3D Surface Scanning—A Novel Protocol to Characterize Virtual Nickel–Titanium Endodontic Instruments

et al. 2023

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The nickel–titanium (NiTi) instruments’ geometry plays an important role in their performance and behavior. The present assessment intends to validate and test the applicability of a 3D surface scanning method using a high-resolution laboratory-based optical scanner to create reliable virtual models of NiTi instruments. Sixteen instruments were scanned using a 12-megapixel optical 3D scanner, and methodological validation was performed by comparing quantitative and qualitative measurements of specific dimensions and identifying some geometric features of the 3D models with images obtained through scanning electron microscopy. Additionally, the reproducibility of the method was assessed by calculating 2D and 3D parameters of three different instruments twice. The quality of the 3D models created by two different optical scanners and a micro-CT device was compared. The 3D surface scanning method using the high-resolution laboratory-based optical scanner allowed for the creation of reliable and precise virtual models of different NiTi instruments with discrepancies varying from 0.0002 to 0.0182 mm. The reproducibility of measurements performed with this method was high, and the acquired virtual models were adequate for use in in silico experiments, as well as for commercial or educational purposes. The quality of the 3D model obtained using the high-resolution optical scanner was superior to that acquired by micro-CT technology. The ability to superimpose virtual models of scanned instruments and apply them in Finite Element Analysis and educational purposes was also demonstrated.

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Section: Introductionmentioning

confidence: 99%

3D Surface Scanning—A Novel Protocol to Characterize Virtual Nickel–Titanium Endodontic Instruments

et al. 2023

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“…However, an analysis conducted at a specific surface level may not be consistent across all the specimens, and the destructive nature of this approach may restrict a comprehensive evaluation of the entire instrument length. To address this limitation, the use of non-destructive imaging systems, including micro-CT (Faus-Matoses et al, 2022) has been proposed. Nevertheless, it is widely recognized that X-ray-based scanners have inherent limitations when imaging materials with high density and atomic weight, such as metals.…”

Section: Discussionmentioning

confidence: 99%

Characterization of four heat‐treated reciprocating instruments: Design, metallurgy, mechanical performance, and irrigation flow patterns

Martins,

Silva,

Marques

et al. 2023

Int Endodontic J

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AimTo compare the design, metallurgy, and mechanical properties of four heat‐treated reciprocating instruments coupled with the evaluation of the irrigation flow using an in silico model.MethodologyNew EdgeOne Fire Primary, Easy‐File Flex Regular 25, WaveOne Gold Primary and Reciproc Blue R25 instruments (n = 124) were initially evaluated regarding their design through stereomicroscopy, scanning electron microscopy and 3D surface scanning. In addition, energy‐dispersive X‐ray spectroscopy was utilized to determine their elemental composition, and differential scanning calorimetry tests to evaluate their phase transformation temperatures. Their mechanical performance was further assessed through torsional and bending tests. Using scans obtained from a real tooth and the instruments, a computational fluid dynamics assessment was conducted to determine the irrigation flow pattern, apical pressure, and wall shear stress in simulated canal preparation. Mood's median and One‐way anova post hoc Tukey tests were used for statistical comparisons (α = 5%).ResultsReciproc Blue exhibited a superior number of blades (n = 8), whereas EdgeOne Fire had the highest overall volume (4.38 mm3) and surface area (32.32 mm2). At the 3‐mm axial level, EdgeOne Fire displayed the lowest core diameter (0.13 mm), while Reciproc Blue had the highest (0.16 mm). All blades were symmetrical, and the tips of the instruments were non‐active but differed from each other. The most irregular surfaces were observed in EdgeOne Fire and Easy‐File Flex. All instruments were manufactured from nickel–titanium alloys and exhibited distinct phase transformation temperatures. WaveOne Gold and Reciproc Blue demonstrated the highest maximum torque values (1.87 and 1.62 N cm, respectively), while the lowest was observed on EdgeOne Fire (1.21 N cm) (p < .05). The most flexible (p < .05) were EdgeOne Fire (angle of rotation: 602.6°; maximum bending load: 251.4 g.f) and Reciproc Blue (533.2° and 235.6 g.f). There were no significant differences observed in the irrigation flow among the four domains generated by the tested instruments.ConclusionsDespite observing variations in the design, phase transformation temperatures, and in the torsional and bending test outcomes among the four heat‐treated reciprocating instruments, no significant differences were found in the irrigation flow pattern among the different groups in the simulated root canal preparations.

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“…A similar methodology was previously used by Fraguas de San José et al to analyze the wear of dental implant drills after clinical use [ 14 ], Alakabani et al to analyze the removal capability of carrier-based root canal filling material from straight root canal systems [ 15 ], and Faus-Matoses et al to analyze the wear of CM-Wire NiTi alloy endodontic reciprocating files after root canal treatment [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Endodontic Access Cavities Performed Using an Augmented Reality Appliance: An In Vitro Study

Faus‐Matoses

Faus-Llácer

Moradian

et al. 2022

IJERPH

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Introduction: The purpose of this study was to compare and contrast the accuracy of endodontic access cavities created using an augmented reality appliance to those performed using the conventional technique. Materials and Methods: 60 single-rooted anterior teeth were chosen for study and randomly divided between two study groups: Group A—endodontic access cavities created using an augmented reality appliance as a guide (n = 30) (AR); and Group B—endodontic access cavities performed with the manual (freehand) technique (n = 30) (MN). A 3D implant planning software was used to plan the endodontic access cavities for the AR group, with a cone-beam computed tomography (CBCT) and 3D intraoral surface scan taken preoperatively and subsequently transferred to the augmented reality device. A second CBCT scan was taken after performing the endodontic access cavities to compare the planned and performed endodontic access for accuracy. Therapeutic planning software and Student’s t-test were used to analyze the cavities at the apical, coronal, and angular levels. The repeatability and reproducibility of the digital measurement technique were analyzed using Gage R&R statistical analysis. Results: The paired t-test found statistically significant differences between the study groups at the coronal (p = 0.0029) and apical (p = 0.0063) levels; no statistically significant differences were found between the AR and MN groups at the angular (p = 0.6596) level. Conclusions: Augmented reality devices enable the safer and more accurate performance of endodontic access cavities when compared with the conventional freehand technique.

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A Novel Digital Technique to Analyze the Wear of CM-Wire NiTi Alloy Endodontic Reciprocating Files: An In Vitro Study

Cited by 5 publications

References 41 publications

3D Surface Scanning—A Novel Protocol to Characterize Virtual Nickel–Titanium Endodontic Instruments

3D Surface Scanning—A Novel Protocol to Characterize Virtual Nickel–Titanium Endodontic Instruments

Characterization of four heat‐treated reciprocating instruments: Design, metallurgy, mechanical performance, and irrigation flow patterns

Accuracy of Endodontic Access Cavities Performed Using an Augmented Reality Appliance: An In Vitro Study

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