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MAHMOUD O, ALHIMAIRI S, SULTAN D, ALI A. Shaping Ability of Different Rotary and Reciprocating File Systems in Simulated S-Shaped Root Canals. Eur Endod J 2024; 9:114 - 123. [PMID: 38377107 PMCID: PMC10938361 DOI: 10.14744/eej.2023.93824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 09/20/2023] [Accepted: 10/25/2023] [Indexed: 02/22/2024] Open
Abstract
OBJECTIVE This study aimed to examine the shaping ability of six rotary and reciprocating file systems, as well as hybrid techniques in simulated S-shaped root canals. METHODS A hundred and twenty S-shaped radiopaque thermosetting epoxy resin blocks were grouped according to the system used for biomechanical preparation. Six groups of 15 canals each were prepared using TruNatomy, Procodile, VDW Rotate, Hyflex CM, OneCurve, and WaveOne Gold, respectively. Two additional hybrid (Procodile/Hyflex CM and Procodile/TruNatomy) groups (n=15 each) were added after evaluating the results of individual systems. All canals were enlarged to 0.25 mm apically. Canal transportation, centering ability, diameter increase, and iatrogenic errors were assessed by superimposed pre-operative and post-operative images. AutoCAD was used for data analysis. All groups were statistically compared with analysis of variance and Tukey honest significant difference test (p<0.05). RESULTS Hyflex CM resulted in the most conservative diameter increase in all thirds (coronal, middle, and apical; p<0.001). Procodile showed the best (p<0.001) centering ability in the coronal and middle thirds, while TruNatomy resulted in the least canal transportation and most centering preparation in the apical third (p<0.001). Hybridisation of Procodile and Hyflex CM produced the least canal transportation and best centering ability in the middle third (p<0.001). No instrument breakage occurred, and no ledge, elbow, or apical zip formation was observed during canal preparation. CONCLUSION Hybridisation of Procodile and Hyflex CM showed remarkable results in preserving the canal diameter in all thirds and resulted in the least canal transportation and best centering ability in the middle third of the canal. However, when treatment cost and duration limit the clinical applicability of the hybrid technique, clinicians can use a single file system (Hyflex CM or TruNatomy) since it shows satisfactory results in all parameters when compared with a hybrid system.
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Affiliation(s)
- Okba MAHMOUD
- Department of Clinical Sciences, Ajman University College of Dentistry, Ajman, UAE
- Center of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman, UAE
| | - Sara ALHIMAIRI
- Department of Clinical Sciences, Ajman University College of Dentistry, Ajman, UAE
| | - Diana SULTAN
- Department of Clinical Sciences, Ajman University College of Dentistry, Ajman, UAE
| | - Ayah ALI
- Department of Clinical Sciences, Ajman University College of Dentistry, Ajman, UAE
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Torres-Carrillo AJS, Assis HC, Salazar-Gamarra RE, Teodosio LM, Silva-Sousa AC, Mazzi-Chaves JF, Ferreira-Soares PB, Sousa-Neto MD, Lopes-Olhê FC. Evaluation of Different Techniques and Materials for Filling in 3-dimensional Printed Teeth Replicas with Perforating Internal Resorption by Means of Micro-Computed Tomography. J Endod 2024; 50:205-212. [PMID: 37918796 DOI: 10.1016/j.joen.2023.10.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/20/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
INTRODUCTION The aim of this study was to evaluate the filling ability of 2 obturation techniques in 3-dimensional (3D) printed teeth with perforating internal resorption (PIR). METHODS A maxillary central incisor was instrumented and scanned by micro-computed tomographic (micro-CT) imaging. The 3D model was exported in the stereolithographic format and, with the aid of OrtogOnBlender software (Cícero Moraes, Sinop, SP, Brazil), a PIR in the middle third of the root canal was designed. Thirty-two replicas were printed in surgical resin and distributed into 4 groups (n = 8) according to the obturation technique and the material used: 2 groups used the hybrid technique, 1 with Bio-C Sealer (BCS; Angelus, Londrina, PR, Brazil)/gutta-percha (GP; VDW GmbH, Munich, Germany) + Bio-C Repair (BCR; Angelus, Londrina, PR, Brazil) and the other with BioRoot (BR; Septodont, Saint Maur des Fosses, France)/gutta-percha (GP) + Biodentine (BD; Septodont, Saint Maur des Fosses, France), and 2 groups used the incremental technique, 1 with BCR and the other with BD. Postobturation micro-CT imaging was performed to measure the percentage volume of voids and laser confocal microscopy to measure the surface roughness (μm) of the repair cements. Data were compared using analysis of variance and Kruskal-Wallis tests. RESULTS Regarding the filling volume in the apical third, the BCS/GP + BCR (89.70 ± 5.15), BR/GP + BD (87.70 ± 8.43), and BCR (84.20 ± 9.00) groups showed the highest percentages compared with the BD group (69.70 ± 6.88) (P < .05). In the area of internal resorption, the BCS/GP + BCR (96.00 ± 2.64) and BCR (95.30 ± 2.93) groups showed the highest percentages compared with the BR/GP + BD group (91.50 ± 1.35) (P < .05). The BD group showed intermediate values that were sometimes similar to the BCS/GP + BCR and BCR groups and similar to the BR/GP + BD group (P > .05). Regarding the quality of the filling in the perforation area, the BCR group showed better results compared with the BD group (P < .001). Regarding roughness, the BCR group (1.66 ± 0.65) showed lower surface roughness compared with the BD group (2.51 ± 0.89) (P < .05). CONCLUSIONS The capacity and quality of the filling in teeth with PIR were superior with the incremental technique with BCR and the hybrid technique with BCS/GP + BCR.
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Affiliation(s)
- Angelo J S Torres-Carrillo
- Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Helena C Assis
- Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Rodrigo E Salazar-Gamarra
- Faculty of Sciences of Life and Health, School of Dentistry, Digital Dentistry Lab, Universidad Científica del Sur, Lima, Peru
| | - Leonardo Moreira Teodosio
- Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Alice C Silva-Sousa
- Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Jardel F Mazzi-Chaves
- Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Manoel D Sousa-Neto
- Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Fabiane C Lopes-Olhê
- Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.
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Schulz-Weidner N, Wang J, Steinbart J, Windfelder AG, Krombach GA, Krämer N, Schlenz MA, Scherberich J. Evaluation of Mechanical Versus Manual Root Canal Preparation in Primary Molars-A Comparative In Vitro Study. J Clin Med 2023; 12:7718. [PMID: 38137787 PMCID: PMC10743663 DOI: 10.3390/jcm12247718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/04/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
The endodontic treatment of primary teeth is to maintain the function of the tooth free of symptoms until its physiological exfoliation. A critical factor for success is how quickly and effectively the root canal preparation can be performed. Therefore, the aim of this comparative in vitro study was to analyze the efficiency of two mechanical root canal preparation systems FM (FlexMaster) and HF (HyFlex EDM) to manual KF (K-file) on extracted primary molars. A total of 45 teeth were divided into three groups (n = 15): KF (#15-35), FM (04#30) and HF (25/~ OneFile). Root canal preparation was performed, and the preparation time was measured. All root canals were non-destructively analyzed by micro-computed tomography in the cervical, middle and apical thirds before and after preparation with regard to the parameters of canal transport (in μm) and centering ratio (0-1). Statistical analysis was performed at a 5% significance level using non-parametric tests. HF caused the lowest canal transport in the apical third (p = 0.008). The centering ratio value of HF was significantly higher in the middle third of the root canals than in the other two groups (p < 0.01). The mean instrumentation time was significantly higher for KF (6.67 min) than for FM (4.69 min) and HF (4.03 min, p < 0.01). HF can be recommended for primary molar root canal treatment.
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Affiliation(s)
- Nelly Schulz-Weidner
- Department of Pediatric Dentistry, Dental Clinic, Justus Liebig University, 35392 Giessen, Germany; (N.S.-W.); (J.W.); (N.K.)
| | - Jiameng Wang
- Department of Pediatric Dentistry, Dental Clinic, Justus Liebig University, 35392 Giessen, Germany; (N.S.-W.); (J.W.); (N.K.)
| | - Jessica Steinbart
- Experimental Radiology, Department of Diagnostic and Interventional Radiology, University Hospital Giessen, Justus Liebig University Giessen, 35392 Giessen, Germany; (J.S.); (A.G.W.)
| | - Anton G. Windfelder
- Experimental Radiology, Department of Diagnostic and Interventional Radiology, University Hospital Giessen, Justus Liebig University Giessen, 35392 Giessen, Germany; (J.S.); (A.G.W.)
- Branch for Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, 35392 Giessen, Germany
| | - Gabriele A. Krombach
- Department of Diagnostic and Interventional Radiology, University Hospital Giessen, Justus Liebig University Giessen, Giessen 35392, Germany;
| | - Norbert Krämer
- Department of Pediatric Dentistry, Dental Clinic, Justus Liebig University, 35392 Giessen, Germany; (N.S.-W.); (J.W.); (N.K.)
| | - Maximiliane A. Schlenz
- Department of Prosthodontics, Dental Clinic, Justus Liebig University, 35392 Giessen, Germany;
| | - Jan Scherberich
- Experimental Radiology, Department of Diagnostic and Interventional Radiology, University Hospital Giessen, Justus Liebig University Giessen, 35392 Giessen, Germany; (J.S.); (A.G.W.)
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Wang Y, Lu Y, Gu Y, Cai Y, Zhang C, Li J. Finding appropriate nickel-titanium instruments for lingual canals in mandibular first premolars with two canals: A micro-CT study. AUST ENDOD J 2023; 49 Suppl 1:89-98. [PMID: 36251403 DOI: 10.1111/aej.12698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 09/15/2022] [Accepted: 09/19/2022] [Indexed: 11/30/2022]
Abstract
This study aimed to find appropriate nickel-titanium instruments for lingual canals in mandibular first premolars with two canals. Forty-two extracted mandibular first premolars with lingual canals (Vertucci type V) verified by micro-CT scanning were selected. The teeth were randomly divided into three groups, and their lingual canals were instrumented by M3, HyFlex CM and XP-endo Shaper, respectively. After instrumentation, the canal morphology was scanned again by micro-CT. The canal morphologies of pre- and post-instrumentation were reconstructed and aligned. Morphological changes of the lingual canals were evaluated. No instrument breakages occurred during the procedure of root canal instrumentation. HyFlex CM and XP-endo Shaper performed better than M3 files in preparation of lingual canals (Vertucci type V) of mandibular first premolars in terms of apical transportation and unprepared surface area.
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Affiliation(s)
- Yunqin Wang
- Jiangsu Province Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
- Department of VIP Clinic, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Yaqian Lu
- Jiangsu Province Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
- Department of VIP Clinic, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Yongchun Gu
- Department of Dentistry and Central Laboratory, Ninth People's Hospital of Suzhou, Suzhou, China
| | - Yixin Cai
- Jiangsu Province Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
- Department of VIP Clinic, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Chengfei Zhang
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | - Jin Li
- Jiangsu Province Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
- Department of VIP Clinic, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
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Kucher M, Dannemann M, Modler N, Böhm R, Hannig C, Kühne MT. Determination of a Representative and 3D-Printable Root Canal Geometry for Endodontic Investigations and Pre-Clinical Endodontic Training-An Ex Vivo Study. Dent J (Basel) 2023; 11:dj11050133. [PMID: 37232784 DOI: 10.3390/dj11050133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/27/2023] Open
Abstract
Models of artificial root canals are used in several fields of endodontic investigations and pre-clinical endodontic training. They allow the physical testing of dental treatments, the operating of instruments used and the interaction between these instruments and the tissues. Currently, a large number of different artificial root canal models exist whose geometry is created either on the basis of selected natural root canal systems or to represent individual geometrical properties. Currently, only a few geometric properties such as the root canal curvature or the endodontic working width are taken into consideration when generating these models. To improve the representational capability of the artificial root canal models, the aim of the current study is therefore to generate an artificial root canal based on the statistical evaluation of selected natural root canals. Here, the approach introduced by Kucher for determining the geometry of a root canal model is used, which is based on the measurement and statistical evaluation of the root canal center line's curvatures and their cross-sectional dimensions. Using the example of unbranched distal root canals of mandibular molars (n = 29), an artificial root canal model representing the mean length, curvature, torsion and cross-sectional dimensions of these teeth could be derived.
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Affiliation(s)
- Michael Kucher
- Faculty of Engineering, Leipzig University of Applied Sciences, 04277 Leipzig, Germany
| | - Martin Dannemann
- Faculty of Automotive Engineering, Institute of Energy and Transport Engineering, Westsächsische Hochschule Zwickau, 08056 Zwickau, Germany
| | - Niels Modler
- Institute of Lightweight Engineering and Polymer Technology (ILK), Technische Universität Dresden, 01307 Dresden, Germany
| | - Robert Böhm
- Faculty of Engineering, Leipzig University of Applied Sciences, 04277 Leipzig, Germany
| | - Christian Hannig
- Clinic of Operative and Pediatric Dentistry, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Marie-Theres Kühne
- Clinic of Operative and Pediatric Dentistry, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
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Fabrication of a Potential Electrodeposited Nanocomposite for Dental Applications. INORGANICS 2022. [DOI: 10.3390/inorganics10100165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In the present study, a nanocrystalline Ni-Fe matrix with reinforced TiO2 nanoparticles as a functional nanocomposite material was fabricated by pulsed current electroforming in UV-LIGA (lithography, electroplating, and molding). The influences of TiO2 nanoparticles on the Ni-Fe nanocomposite deposition were also investigated using scanning electron microscopy, transmission electron microscopy, and in vitro cytotoxicity assay. It was found that the Ni-Fe nanocomposite with 5 wt.% TiO2 nanoparticles showed a smooth surface and better dispersion property. When the Ni-Fe nanocomposite is combined with 20 wt.% TiO2, it resulted in congeries of TiO2 nanoparticles. In addition, TiO2 nanoparticles possessed better dispersion properties as performed in pulse current electrodeposition. The microstructure of the electrodeposited Ni-Fe-TiO2 nanocomposite was a FeNi3 phase containing anatase nano-TiO2. Moreover, the electrodeposited Ni-Fe-5 wt.% TiO2 nanocomposite exhibited a smooth surface and structural integrity. Cytotoxicity assay results also proved that the Ni-Fe nanocomposite with different concentrations of TiO2 nanoparticles had good biocompatibility. Therefore, the optimization of pulse current electroforming parameters was successfully applied to fabricate the Ni-Fe-TiO2 nanocomposite, and thus could be used as an endodontic file material for dental applications.
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do Nascimento BMZ, Mazzi-Chaves JF, Sousa-Neto MD, Baratto-Filho F, Fagundes Tomazinho FS, Leonardi DP. Effect of Root Canal Preparation on Propagation of Dentinal Microcracks. IRANIAN ENDODONTIC JOURNAL 2021; 16:90-96. [PMID: 36704217 PMCID: PMC9709900 DOI: 10.22037/iej.v16i2.26744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/09/2021] [Accepted: 03/06/2021] [Indexed: 01/28/2023]
Abstract
Introduction This study evaluated the propagation of dentinal microcracks and the root canal volume increase after being prepared with two endodontic instruments: ProTaper Next (PTN) and WaveOne Gold (WOG) by micro-computed tomography analysis. Methods and Materials We selected 48 maxillary molars randomly distributed in two groups: PTN and WOG. The samples were scanned before and after instrumentation, and then the image analysis was performed to detect the propagation of pre-existing dentinal micro-cracks and calculate the pre- and post-instrumentation volume. The statistical analysis was performed using Student's t-test, Fisher's exact test, and ANCOVA (P<0.05). Results Dentinal microcracks were observed in 95.8% of the samples, both PTN and WOG instruments propagated microcracks after instrumentation, but there was no significant difference between the instruments (P=0.538). In relation to the root canal volume there was no statistic difference between PTN and WOG systems for the mesiobuccal (P=0.426) and distobuccal root canals (P=0.523). Conclusion We can conclude that both ProTaper Next and WOG systems propagate dentinal microcracks after root canal preparation in this in vitro study, without statistical significance. The root canal volume prepared also showed no statistically significant difference between the two groups. This in vitro study requires further studies for more concrete conclusions.
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Affiliation(s)
| | | | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Brazil;
| | - Flares Baratto-Filho
- Department of Dentistry, Universidade da Região de Joinville, Joinville, Santa Catarina, Brazil
| | - Flávia Sens Fagundes Tomazinho
- School of Health Sciences, Universidade Positivo, Curitiba, Paraná, Brazil; ,Corresponding author: Flávia Sens Fagundes Tomazinho, Rua Professor Pedro Viriato Parigot de Souza, 5300 -Campo Comprido, Curitiba, Paraná, Brasil, CEP: 81280-330
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TRUShape Versus XP-endo Shaper: A Micro–computed Tomographic Assessment and Comparative Study of the Shaping Ability—An In Vitro Study. J Endod 2020; 46:271-276. [DOI: 10.1016/j.joen.2019.10.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 10/18/2019] [Accepted: 10/25/2019] [Indexed: 11/17/2022]
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Micro–computed Tomographic Evaluation of the Shaping Ability of WaveOne Gold, TRUShape, EdgeCoil, and XP-3D Shaper Endodontic Files in Single, Oval-shaped Canals: An In Vitro Study. J Endod 2020; 46:244-251.e1. [DOI: 10.1016/j.joen.2019.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 10/31/2019] [Accepted: 11/07/2019] [Indexed: 11/18/2022]
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