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Journal articles on the topic 'NiTi wire'

Author: Grafiati

Published: 8 September 2021

Last updated: 29 July 2025

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1

Han, Yu-Lin, De-Jin Xing, Er-Tian Xiao, and Ai-Qun Li. "NiTi-wire Shape Memory Alloy Dampers to Simultaneously Damp Tension, Compression, and Torsion." Journal of Vibration and Control 11, no. 8 (2005): 1067–84. http://dx.doi.org/10.1177/1077546305055773.

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NiTi-wire shape memory alloy (SMA) dampers, which utilize NiTi SMA wires to simultaneously damp tension, compression, and torsion, have been developed for structural control implementation in this study. First, three reduced-scale NiTi-wire SMA dampers were constructed. Then, mechanics analysis of the NiTi-wire SMA dampers was performed, based on a model of the SMA-wire restoring force and on tension, compression, and torsion damping analysis. Finally, tension, compression, and torsion experiments were carried out, using the three reduced-scale NiTi-wire SMA dampers of different diameters. The

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2

Tua-Ngam, Peerapong, Surachai Dechkunakorn, and Niwat Anuwongnukroh. "Surface Characteristics, Chemical Composition and Ni Release of NiTi Wire in Different pH." Advanced Materials Research 884-885 (January 2014): 586–92. http://dx.doi.org/10.4028/www.scientific.net/amr.884-885.586.

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Objective: To study the surface characteristics, chemical composition and Ni release from simulated standard fixed orthodontic appliance ligated with two differently priced nickel titanium (NiTi) archwires in artificial saliva at pH 5.14 and 6.69 for 4 weeks at 37oC. Materials and Methods: Two commercial NiTi rectangular wire (Ormco and Smart), 0.016 x 0.022 in size were studied. Their surface characteristics were evaluated: surface morphology by scanning electron microscope, surface roughness by surface roughness tester and grain structure analysis by optical microscope. Their chemical compos

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3

Choudary, Dhanyabiram, Poornima Jnaneshwar, and Ravi Kannan. "EVALUATION AND COMPARISON OF LOAD DEFLECTION RATE OF FOUR INITIAL ORTHODONTIC ARCH WIRES: AN IN VITRO STUDY." International Journal of Orthodontic Rehabilitation 13, no. 3 (2022): 1–9. http://dx.doi.org/10.56501/intjorthodrehabil.v13i3.18.

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Aim: The aim of this study was to evaluate the load-deflection rate of four different types of archwires used in initial stage of orthodontic treatment. Materials and methods: A modified three-point bending test was performed on the sample of 60 wires of superelastic Nickel Titanium(NiTi), everwhite esthetic NiTi, thermal NiTi and multistranded coaxial stainless steel (15 each). The load exerted by each of the wire was measured at the deflections of 2 mm and 4mm, subsequent unloading process at 37°C temperature. Results: Comparison of mean load-deflection values revealed that therm

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4

Oh, Soram, Tae-Hwan Kim, and Seok Woo Chang. "Mechanical Properties of NiTi Rotary Files Fabricated through Gold-Wire, CM-Wire, T-Wire, and R-Phase Heat Treatment." Applied Sciences 13, no. 6 (2023): 3604. http://dx.doi.org/10.3390/app13063604.

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Although nickel–titanium (NiTi) rotary files are invaluable tools in dentistry, the relationship between their properties and performance has not been elucidated. Herein, the performance of gold heat-treated (ProTaper Gold and ProfaTaper Gold), controlled memory (CM)-wire (HyFlex CM and V Taper 2H), T-wire (2Shape), and R-phase heat-treated (K3XF) NiTi files was evaluated; the non-heat-treated ProFile was used as the control. The bending, buckling, cyclic fatigue, and torsional resistances of the NiTi files were determined, and their phase transformation behavior was studied through differenti

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5

Karjalainen, T., H. Göransson, A. Viinikainen, T. Jämsä, and J. Ryhänen. "Nickel–titanium wire as a flexor tendon suture material: an ex vivo study." Journal of Hand Surgery (European Volume) 35, no. 6 (2010): 469–74. http://dx.doi.org/10.1177/1753193409347421.

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Nickel–titanium shape memory alloy (NiTi) is a new suture material that is easy to handle, is strong, and biocompatible. The purpose of this study was to evaluate the material properties and biomechanical behaviour of 150 µm and 200 µm NiTi wires in flexor tendon repair. Braided polyester (4-0 Ethibond®) was used as control. Fifty fresh-frozen porcine flexor tendons were repaired using the Pennington modification of the Kessler repair or a double Kessler technique. NiTi wires were stiffer and reached higher tensile strength compared to braided polyester suture. Repairs with 200 µm NiTi wire ha

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6

Nucera, Riccardo, Elda Gatto, Chiara Borsellino, et al. "Influence of bracket-slot design on the forces released by superelastic nickel-titanium alignment wires in different deflection configurations." Angle Orthodontist 84, no. 3 (2013): 541–47. http://dx.doi.org/10.2319/060213-416.1.

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ABSTRACT Objective: To evaluate how different bracket-slot design characteristics affect the forces released by superelastic nickel-titanium (NiTi) alignment wires at different amounts of wire deflection. Materials and Methods: A three-bracket bending and a classic-three point bending testing apparatus were used to investigate the load-deflection properties of one superelastic 0.014-inch NiTi alignment wire in different experimental conditions. The selected NiTi archwire was tested in association with three bracket systems: (1) conventional twin brackets with a 0.018-inch slot, (2) a self-liga

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7

Tosetti, João Pedro, Gilberto Alvares da Silva, and Jorge Otubo. "Microstructure Evolution during Fabrication of Ni-Ti-Nb SMA Wires." Materials Science Forum 775-776 (January 2014): 534–37. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.534.

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Ni-Ti-Nb system alloys show wide shape memory hysteresis, suitable for assembly applications. The microstructure is composed by NiTi matrix (with some dissolved Nb) and Nb dispersed particles (with some Ni and Ti content). These particles are to cause the hysteresis widening. This work evaluates the microstructure evolution during wire fabrication process of equiatomic Ni and Ti alloys with increasing Nb content (1.5, 3.0, 6.0 and 9,0%at.). It is shown that as-cast alloys with up to 9% at.Nb and near equiatomic Ni:Ti relation show three main microconstituents: NiTi matrix phase, interdendritic

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8

Sharma, Vipul Kumar, Gitanjali Yadav, TP Chaturvedi, SN Upadhyay, and Ragini Tilak. "Microbial corrosion of orthodontic wires." IP Indian Journal of Orthodontics and Dentofacial Research 8, no. 1 (2022): 23–27. http://dx.doi.org/10.18231/j.ijodr.2022.004.

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To evaluate microbial corrosion by weight loss, microbial corrosion and elemental analysis of NiTi and stainless wires after period of 2 months in streptococcus mutans containing media. Percentage change in weight after 2 months is 1.7% and 0.8% in NiTi & SS respectively. Elemental analysis of NiTi wire in streptococcus containing media showed decrease in Ni by 2.9% by weight and Ti decreased 3.07% by weight due to leaching of Ni and Ti from the surface of wires. In stainless steel wire, there was decrease in Fe by 8.82% and Cr 1.39% by weight. Significant microbial corrosion was observed

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9

Pedullà, Eugenio, Francesco Saverio Canova, Giusy Rita Maria La Rosa, et al. "Influence of NiTi Wire Diameter on Cyclic and Torsional Fatigue Resistance of Different Heat-Treated Endodontic Instruments." Materials 15, no. 19 (2022): 6568. http://dx.doi.org/10.3390/ma15196568.

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We compared the mechanical properties of 2Shape mini TS2 (Micro-Mega, Besançon, France) obtained from 1.0 diameter nickel-titanium (NiTi) wires and 2Shape TS2 from 1.2 diameter nickel-titanium (NiTi) wires differently thermally treated at room and body temperature. We used 120 NiTi TS2 1.0 and TS2 1.2 files made from controlled memory (CM) wire and T-wire (n = 10). Cyclic fatigue resistance was tested by recording the number of cycles to fracture (NCF) at room and body temperatures using a customized testing device. Maximum torque and angle of rotation at failure were recorded, according to IS

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Wichai, Wassana, Niwat Anuwongnukroh, and Surachai Dechkunakorn. "Comparison of Chemical Properties and Ni Release of Stainless Steel and Nickel Titanium Wires." Advanced Materials Research 884-885 (January 2014): 560–65. http://dx.doi.org/10.4028/www.scientific.net/amr.884-885.560.

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Objective: This study aimed to determine the composition and corrosion resistance of stainless steel and nickel titanium (NiTi) archwires and to compare Ni released from simulated standard fixed orthodontic appliances ligated with stainless steel and NiTi wires in artificial saliva at pH 5.14 and pH 6.69. in 4 weeks at 37oC. Materials and Method: Two commercial rectangular wires, 0.016 x 0.022 in size were studied, one Ormco stainless steel wire and another Ormco nickel titanium wire. Their composition was analyzed by an energy disporsive X-ray spectrometer (ESC) and their corrosion resistance

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11

Pu, Ze, and Baohua Chang. "Control of droplet transfer during in-situ synthesis of NiTi alloys by dual-wire electron beam additive manufacturing." Journal of Physics: Conference Series 2369, no. 1 (2022): 012011. http://dx.doi.org/10.1088/1742-6596/2369/1/012011.

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In this paper, the droplet transfer mode during in-situ synthesis of NiTi alloys by dual-wire electron beam additive manufacturing by pure Ni and Ti wires was comprehensively studied. This work shows that the droplet transfer was jointly determined by the droplet transfer distance together with spatial position between two wires and electron beam. By reasonable control of the above factors, an ideal stable continuous liquid bridge transfer mode could be achieved. In this mode, Ni wire and Ti wire could be melted together and form a shared molten pool, which avoids the occurrence of spatter and

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12

Elkhal Letaief, Wissem, Aroua Fathallah, Tarek Hassine, and Fehmi Gamaoun. "Finite element analysis of hydrogen effects on superelastic NiTi shape memory alloys: Orthodontic application." Journal of Intelligent Material Systems and Structures 29, no. 16 (2018): 3188–98. http://dx.doi.org/10.1177/1045389x18754356.

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Thanks to its greater flexibility and biocompatibility with human tissue, superelastic NiTi alloys have taken an important part in the market of orthodontic wires. However, wire fractures and superelasticity losses are notified after a few months from being fixed in the teeth. This behavior is due to the hydrogen presence in the oral cavity, which brittles the NiTi arch wire. In this article, a diffusion-mechanical coupled model is presented while considering the hydrogen influences on the NiTi superelasticity. The model is integrated in ABAQUS finite element software via a UMAT subroutine. Ad

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13

Ali, Hashim. "Right wire in orthodontics: a review." Journal of Research in Dentistry 3, no. 3 (2015): 706. http://dx.doi.org/10.19177/jrd.v3e32015706-710.

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Quality of orthodontic wire such as stiffness, hardness, resiliency, elasticity and working range are important determinants of the effectivenes of tooth movement. Commonly used types of orthodontic arch wire:1) stainless steel(ss) wire, 2) conventional nickel- titanium (NiTi)alloy wire,3) improved super elastic NiTi- alloy wire( also called low hysteresis(LH)wire), and titanium molybdenum alloy(TMA) wire.

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14

Batista, Deric Meschiari, Melissa Faccini, Fabricio Pinelli Valarelli, et al. "Attractiveness of different esthetic orthodontic wires." Dental Press Journal of Orthodontics 25, no. 6 (2020): 27–32. http://dx.doi.org/10.1590/2177-6709.25.6.027-032.oar.

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ABSTRACT Objective: The aim of this study was to evaluate the attractiveness of different types of esthetic orthodontic wires by laypeople and dentists. Methods: Five different types of orthodontic wires were evaluated: three esthetic wires (Teflon-coated, epoxy resin-coated and rhodium-coated wires), and two metallic wires (stainless steel and NiTi), as control. Monocrystalline ceramic brackets were installed in the maxillary arch of a patient presenting good dental alignment. The five evaluated wires were attached to the orthodontic appliance with an esthetic silicone elastic and photographe

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15

Polychronis, Georgios, Youssef S. Al Jabbari, Theodore Eliades, and Spiros Zinelis. "Galvanic coupling of steel and gold alloy lingual brackets with orthodontic wires: Is corrosion a concern?" Angle Orthodontist 88, no. 4 (2018): 450–57. http://dx.doi.org/10.2319/092917-655.1.

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ABSTRACT Objectives: The aim of this research was to assess galvanic behavior of lingual orthodontic brackets coupled with representative types of orthodontic wires. Materials and Methods: Three types of lingual brackets: Incognito (INC), In-Ovation L (IOV), and STb (STB) were combined with a stainless steel (SS) and a nickel-titanium (NiTi) orthodontic archwire. All materials were initially investigated by scanning electron microscopy / x-ray energy dispersive spectroscopy (SEM/EDX) while wires were also tested by x-ray diffraction spectroscopy (XRD). All bracket-wire combinations were immers

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16

Faus-Matoses, Vicente, Vicente Faus-Llácer, Álvaro Aldeguer Muñoz, et al. "A Novel Digital Technique to Analyze the Wear of CM-Wire NiTi Alloy Endodontic Reciprocating Files: An In Vitro Study." International Journal of Environmental Research and Public Health 19, no. 6 (2022): 3203. http://dx.doi.org/10.3390/ijerph19063203.

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The present study seeks to describe a novel digital measurement technique for analyzing the wear volume of controlled memory (CM)-wire NiTi alloy endodontic reciprocating files after clinical use. Material and Methods: Ten CM-wire NiTi endodontic reciprocating files were randomly used in ten first upper molar teeth within four root canals. The CM-wire NiTi alloy endodontic reciprocating files were subjected to preoperative and postoperative micro-computed tomography (micro-CT) scans to obtain accurate digital imaging and communication on medicine (DICOM) digital files, which were segmented usi

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Faus-Matoses, Vicente, Vicente Faus-Llácer, Celia Ruiz-Sánchez, et al. "The Cyclic Fatigue Resistance of Different Lengths of CM Gold Wire and CM Blue Wire NiTi Alloy Endodontic Rotary Files: An In Vitro Study." Applied Sciences 13, no. 7 (2023): 4612. http://dx.doi.org/10.3390/app13074612.

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Background: The objective of the present study was to measure and compare how the length of CM Gold Wire and CM Blue Wire NiTi alloy endodontic rotary files impacts their resistance to cyclic fatigue. Methods: A total of 40 sterile endodontic rotary files were chosen and allocated to the following study groups: (A) 25.06 CM Gold wire NiTi alloy endodontic rotary files, 31 mm in length (n = 10); (B) 25.06 CM Gold wire NiTi alloy endodontic rotary files, 25 mm in length (n = 10); (C) 25.06 CM Gold wire NiTi alloy endodontic rotary files, 21 mm in length (n = 10); and (D) 25.06 CM Blue wire NiTi

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18

Jun, Yeo Jin, Doo Kyung Hwang, Hee Sun Lee, Byung Moon Kim, and Ki Dong Park. "Flow Diverter Performance Comparison of Different Wire Materials for Effective Intracranial Aneurysm Treatment." Bioengineering 11, no. 1 (2024): 76. http://dx.doi.org/10.3390/bioengineering11010076.

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A flow diverter (FD) is an effective method for treating wide-necked intracranial aneurysms by inducing hemodynamic changes in aneurysms. However, the procedural technique remains challenging, and it is often not performed properly in many cases of deployment or placements. In this study, three types of FDs that changed the material of the wire were prepared within the same structure. Differences in physical properties, such as before and after delivery loading stent size, radial force, and radiopacity, were evaluated. The performances in terms of deployment and trackability force were also ev

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Ishak Latiffi, Nur Ainul Nurina, Muhammad Fauzinizam Razali, and Abdus Samad Mahmud. "Effect of Bracket Width on Bending Deformation of NiTi Arch Wire: A Finite Element Study." Key Engineering Materials 929 (August 24, 2022): 95–101. http://dx.doi.org/10.4028/p-u3jk8p.

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The force transferred from the NiTi arch wire to the tooth during orthodontic treatment is strongly dependent on the geometry of the wire and brackets used by the orthodontist. This study investigated the effect of orthodontic bracket geometry on the bending behaviour of superelastic NiTi arch wire. A three-dimensional finite element models of wire bending in three-brackets configuration was developed by employing superelastic user material subroutine and contact interaction. The finite element model was used to anticipate the bending forces and stresses of NiTi wires as they were engaged in v

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Simsek, Gorkem Muttalip, Mehmet Ipekoglu, and Guney Guven Yapici. "Effect of Coating Method on the Surface Characteristics of NiTi Shape Memory Alloy." Materials Science Forum 1015 (November 2020): 108–12. http://dx.doi.org/10.4028/www.scientific.net/msf.1015.108.

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Metallic materials including stainless steel, cobalt-chromium alloys, titanium and its alloys, and nickel-titanium (NiTi) shape memory alloys have been used in biomedical applications since the 1940s due to their favorable mechanical properties. Classified as a smart material, NiTi alloy has gained noticeable popularity in biomedical fields such as orthopedic, dental, and cardiovascular applications as it retains reasonable corrosion resistance and biocompatibility along with unique shape memory properties. However, several studies have shown their limits in medical applications due to the ris

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Jang, Se Rim, Il Won Suh, and Lida Heng. "Nanoscale Polishing Technique of Biomedical Grade NiTi Wire by Advanced MAF Process: Relationship between Surface Roughness and Bacterial Adhesion." Journal of Functional Biomaterials 14, no. 4 (2023): 177. http://dx.doi.org/10.3390/jfb14040177.

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Nitinol (NiTi), an alloy of nickel and titanium, wires are an important biomedical material that has been used in catheter tubes, guidewires, stents, and other surgical instruments. As such wires are temporarily or permanently inserted inside the human body, their surfaces need to be smoothed and cleaned in order to prevent wear, friction, and adhesion of bacteria. In this study, NiTi wire samples of micro-scale diameters (i.e., Ø 200 μm and Ø 400 μm) were polished by an advanced magnetic abrasive finishing (MAF) process using a nanoscale polishing method. Furthermore, bacterial adhesion (i.e.

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22

Leite, Vanessa Vieira, Murilo Baena Lopes, Alcides Gonini Júnior, Marcio Rodrigues de Almeida, Sandra Kiss Moura, and Renato Rodrigues de Almeida. "Comparison of frictional resistance between self-ligating and conventional brackets tied with elastomeric and metal ligature in orthodontic archwires." Dental Press Journal of Orthodontics 19, no. 3 (2014): 114–19. http://dx.doi.org/10.1590/2176-9451.19.3.114-119.oar.

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OBJECTIVE: To compare the frictional resistance between self-ligating and conventional brackets tied to different types of wire. MATERIAL AND METHODS : Abzil Kirium Capelozza (Pattern I) and Easy Clip (Roth prescription) incisor brackets were used. An elastomeric ligature or a ligating wire 0.10-in was used to ligate the wire to the Abzil bracket. Three types of orthodontic archwire alloys were assessed: 0.016-in NiTi wire, 0.016 x 0.021-in NiTi wire and 0.019 x 0.025-in steel wire. Ten observations were carried out for each bracket-archwire angulation combination. Brackets were mounted in a s

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Dos Reis, Rômulo Pierre Batista, Cícero da Rocha Souto, Carlos José de Araújo, Antonio Almeida Silva, and Edson Paulo da Silva. "Vibration Attenuation in an Epoxy Smart Composite Beam with Embedded NiTi Shape Memory Wires." Materials Science Forum 643 (March 2010): 7–13. http://dx.doi.org/10.4028/www.scientific.net/msf.643.7.

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Shape memory alloys (SMA) are thermo-responsive materials where deformation can be induced and recovered through temperature changes. Therefore, SMA are considered smart materials. In this work, an epoxy beam reinforced by NiTi SMA wires was developed. This active composite contains five pre-trained NiTi SMA wire actuators, evenly distributed along the neutral plane of the epoxy beam, which can be activated by resistive heating. The results of different ways for electrical activation of the smart composite in a simply clamped mode are discussed. It was possible to demonstrate the viability of

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Seman, S. A. H. A., M. F. Razali, A. S. Mahmud, and M. H. Hassan. "Computational Evaluation of Frictional Force Changes in Three-Point and Three-Bracket Bending Models." Journal of Mechanical Engineering 18, no. 3 (2021): 21–35. http://dx.doi.org/10.24191/jmeche.v18i3.15412.

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NiTi arch wires are commonly used at the initial stage of orthodontic treatment, due to their superelastic and biocompatibility properties. Numerous bending models have been considered to anticipate the mechanical responses of the superelastic NiTi wire in the oral environment. It is known that the magnitude of bending force exerted by the NiTi wire is relatively influenced by the magnitude of friction generated at the wire-support interfaces. These data on the variability of friction magnitude for various bending models, however, are very limited in the literature. This study investigated the

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Rongo, Roberto, Rosa Valletta, Rosaria Bucci, et al. "In vitro biocompatibility of nickel-titanium esthetic orthodontic archwires." Angle Orthodontist 86, no. 5 (2016): 789–95. http://dx.doi.org/10.2319/100415-663.1.

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ABSTRACT Objective: To investigate the cytotoxicity of nickel-titanium (NiTi) esthetic orthodontic archwires with different surface coatings. Materials and Methods: Three fully coated, tooth-colored NiTi wires (BioCosmetic, Titanol Cosmetic, EverWhite), two ion-implanted wires (TMA Purple, Sentalloy High Aesthetic), five uncoated NiTi wires (BioStarter, BioTorque, Titanol Superelastic, Memory Wire Superelastic, and Sentalloy), one β-titanium wire (TMA), and one stainless steel wire (Stainless Steel) were considered for this study. The wire samples were placed at 37°C in airtight test tubes con

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26

Teodoriu, Adrian Petru, Bogdan Pricop, Nicoleta-Monica Lohan, et al. "Designing a Robotic Gripper Based on the Actuating Capacity of NiTi-Based Shape Memory Wires." Actuators 13, no. 8 (2024): 319. http://dx.doi.org/10.3390/act13080319.

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In the present study, the capacity of two commercial NiTi and NiTiCu shape memory alloy (SMA) wires to develop work-generating (WG) and constrained-recovery (CR) shape memory effects (SMEs), as well as the capacity of a commercial NiTiFe super-elastic wire to act as cold-shape restoring element, have been investigated. Using differential scanning calorimetry (DSC), the reversible martensitic transformation to austenite of the three NiTi-based wires under study was emphasized by means of an endothermic minimum of the heat flow variation with temperature. NiTi and NiTiCu wire fragments were furt

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Lubis, Hilda Fitria, Kholidina Imanda Harahap, and Nadia Tamari Lubis. "Differences in nickel ions released from nickel-titanium arch wire after immersion in detergent and non-detergent toothpaste." Majalah Kedokteran Gigi Indonesia 6, no. 2 (2021): 77. http://dx.doi.org/10.22146/majkedgiind.41564.

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Nickel-titanium (NiTi) arch wire has properties that favor its use during the leveling and aligning phase of orthodontic treatment. This NiTi orthodontic arch wire has the potential to experience nickel ion release. One factor that can cause the release of nickel ions is toothpaste. Nickel ions released can enter the body and cause carcinogenic, mutagenic, cytotoxic, and allergic effects. The purpose of this study was to see the differences of nickel ions released from NiTi orthodontic arch wire after immersion in detergent and non-detergent toothpaste. This was a laboratory experimental resea

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Singh, Shalini, Elena Demidova, Natalia Resnina, et al. "NiTi–Cu Bimetallic Structure Fabrication through Wire Arc Additive Manufacturing." Materials 17, no. 5 (2024): 1006. http://dx.doi.org/10.3390/ma17051006.

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This study endeavors to comprehensively explore and elucidate the seamless integration of NiTi shape memory alloys (SMAs) into multifaceted applications through the utilization of novel joining techniques. The primary focus lies in the utilization of wire arc additive manufacturing (WAAM) to deposit Nitinol (NiTi) onto Copper (Cu), thereby introducing a transformative approach for their integration into electro-mechanical systems and beyond. Through a detailed examination of the NiTi/Cu bimetallic junction, using advanced analytical techniques including SEM, XRD, and DSC analyses, this researc

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Hwang, Daeyoung, Namki Choi, and Seonmi Kim. "Light-force orthodontic treatment using the minitube appliance and thin NiTi wire in children and adolescent: Case reports." Journal of The Korean Dental Association 61, no. 2 (2023): 112–22. http://dx.doi.org/10.22974/jkda.2023.61.2.002.

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The mini-tube appliance (MTA) is comfortable and advantageous in terms of aesthetics and oral hygiene compared to conventional brackets. By using 0.012 inch Thermoactive (TA) NiTi wires, the frictional resistance is low. So treatment are possible within a short period and there are fewer side effects, such as root resorption. Light-force orthodontic treatment using MTA and thin TA NiTi wire is a suitable treatment method in pediatric dentistry, considering the increasing aesthetic needs and the nature of pediatric patients. By using the MTA and thin TA NiTi wire, the cases reported here have l

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Noonai, Nakhon, Anak Khantachawana, Pongpan Kaewtatip, and Julathep Kajornchaiyakul. "Improvement of Mechanical Properties and Transformation Behavior of NiTi Drawn Wires for Orthodontics Applications." Advanced Materials Research 378-379 (October 2011): 623–27. http://dx.doi.org/10.4028/www.scientific.net/amr.378-379.623.

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NiTi shape memory alloy is widely used in dental applications such as orthodontics arch wire, mini screw implant, orthodontics spring, etc., because of its favorable superelasticity and shape memory effect. Wire drawing is a fundamental manufacturing process used for producing orthodontics arch wires. It is well known that cold-work occurred during wire drawing operation is also important to control mechanical properties and transformation temperature of NiTi wires. Thus, the purpose of this work is to study the effect of cold working by means of reduction ratio of cross -sectional area and he

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31

Dechkunakorn, Surachai, Niwat Anuwongnukroh, Nuntinee Nanthavannich, and Subongkoch Tongkoom. "Comparison of Horizontal and Vertical Deactivation Force, Length and Superelasticity in Three Commercial NiTi Orthodontic Archwires." Advanced Materials Research 1025-1026 (September 2014): 330–35. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.330.

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Objectives: The aim of this study was to investigate and to compare the deactivation force, deactivation length and superelasticity in horizontal and vertical directions of Nickel-titanium (NiTi) orthodontic archwires made by 3 different manufactures. Materials and methods: The archwires tested were NiTi-OR (Ormco), NiTi-GH (G&H) and NiTi-H (Highland) and were 0.016 x 0.022 inch2in cross-section and 25 mm in length. The study analysed load-deflection curves from three-point bending tests performed for each type of NiTi wire in vertical (occluso-gingival) direction (0.022” in horizontal dim

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Shekatkar, Yash K., MV Ashith, Sunil Muddiah, et al. "Evaluation of the Effect of Reverse Curve of Spee in Nickel Titanium (NiTi) Wire with and Without Torque on Lower Incisors: A Clinical Study." Journal of Pharmacy and Bioallied Sciences 16, Suppl 5 (2024): S4655—S4659. https://doi.org/10.4103/jpbs.jpbs_1323_24.

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ABSTRACT Introduction: The study aimed to evaluate the impact of the reverse curve of Spee in nickel-titanium (NiTi) wire both with and without torque on lower incisors. Materials and Methods: Twenty patients were divided into 2 groups. The inclusion criteria for the study were 1) age group between 12–25 years and 2) deepbite bite of 5–7 mm. All the subjects were treated with preadjusted edgewise brackets with Roth prescription for tip and torque values and a 0.022” slot. One group was treated with 0.019 × 0.025” Reverse curve NiTi (conventional) and the other group with 0.019 × 0.025” Pretorq

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Isalgué, Antonio, Javier Fernández, Nuria Cinca, et al. "Thermomechanical Fatigue Behavior of NiTi Wires." Materials Science Forum 738-739 (January 2013): 311–15. http://dx.doi.org/10.4028/www.scientific.net/msf.738-739.311.

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Applications of the functional, smart materials SMA need a careful evaluation of the working conditions and fatigue life. Structural fatigue failure in NiTi usually comes from a surface defect inducing crack growth, and this means that fatigue has to be studied for concrete applications, with the correct samples, as the state of the material presents size effects. Testing machine experiments on Ni-rich pseudoelastic wires indicate that the main parameter controlling the fatigue life in the traction-traction experiments is the effective stress on the NiTi wire. Long wire life (in the million cy

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Pratomo, Harris Gadih, Endah Mardiati, Eky Soeria Soemantri, and Ida Ayu Evangelina. "Deflection test on different orthodontic wire materials sized 0.016 x 0.022 inches." Majalah Kedokteran Gigi Indonesia 4, no. 3 (2019): 142. http://dx.doi.org/10.22146/majkedgiind.31236.

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The development of technology in orthodontic field produces some orthodontic wires that have different deflection abilities. Loading force is the force needed to place an orthodontic wire in bracket slot (activation). Unloading force is the force produced by an orthodontic wire to move tooth (deactivation). Deflection test with three-point bending technique is a technique that is often used to determine the magnitude of the activation and deactivation force of orthodontic wire. Stainless steel (SS), nickel titanium (NiTi), copper nickel titanium (CuNiTi), and beta titanium (TMA), are the types

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KOIKE, Fernando, Hiroshi MARUO, Rogério LACERDA-SANTOS, Matheus Melo PITHON, and Orlando Motohiro TANAKA. "Mechanical properties of orthodontic wires on ceramic brackets associated with low friction ligatures." Revista de Odontologia da UNESP 46, no. 3 (2017): 125–30. http://dx.doi.org/10.1590/1807-2577.19716.

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Abstract Introduction Few studies investigated the mechanical properties of orthodontic wires on ceramic brackets associated the ligatures. Objective This study aimed to compare the load-deflection of orthodontic wires with round section of 0.016” made of stainless steel (SS), nickel-titanium (NiTi) and glass fiber-reinforced polymer composite (GFRPC). Material and method Sixty specimens obtained from 10 sectioned pre-contoured arches (TP Orthodontics), were divided into 3 groups of 20 according to each type of material (1 esthetic-type wire and 2 not esthetic) and length of 50 mm. The methodo

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Shim, Kyu-Sang, Soram Oh, KeeYeon Kum, Yu-Chan Kim, Kwang-Koo Jee, and Seok Woo Chang. "Mechanical and Metallurgical Properties of Various Nickel-Titanium Rotary Instruments." BioMed Research International 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/4528601.

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The aim of this study was to investigate the effect of thermomechanical treatment on mechanical and metallurgical properties of nickel-titanium (NiTi) rotary instruments. Eight kinds of NiTi rotary instruments with sizes of ISO #25 were selected: ProFile, K3, and One Shape for the conventional alloy; ProTaper NEXT, Reciproc, and WaveOne for the M-wire alloy; HyFlex CM for the controlled memory- (CM-) wire; and TF for the R-phase alloy. Torsional fracture and cyclic fatigue fracture tests were performed. Products underwent a differential scanning calorimetry (DSC) analysis. The CM-wire and R-ph

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Dechkunakorn, Surachai, Chavarit Sujaritviriyakul, Niwat Anuwongnukroh, and Nathaphon Tangit. "Effect of Direct Electric Resistance Heat Treatment on Loading/Unloading Behavior of Nickel Titanium Orthodontic Wire." Applied Mechanics and Materials 487 (January 2014): 135–40. http://dx.doi.org/10.4028/www.scientific.net/amm.487.135.

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Objective: The aim of this study was to investigate and compare the loading and unloading characteristics of various nickel-titanium (NiTi) and nickel-titanium-copper (NiTiCu) after direct electric resistance heat treatment method (Bender soarer-X equipment). Materials and Methods: Five types of commercial NiTi and NiTiCu orthodontic archwires [NiTi (W&H), NiTi (Ormco), CuNiTi (Ormco), Sentalloy (Tomy) and L&H (Tomy)] underwent heat treatment by the Bender soarer-X equipment and all samples underwent the three point bending tests to analyze their loading and unloading characteristics.

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Abu Al Timan, Jamal A., Iman M. Al Zaka, and Baidaa M. Zeidan. "Hyflex CM and EDM from Shape Memory to Control Memory." Erbil Dental Journal 6, no. 2 (2023): 171–74. http://dx.doi.org/10.15218/edj.2023.18.

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The new era in endodontics has been established with the introduction of nickel titanium (NiTi) alloys, and later on the automation of mechanical preparation. By changing the phase transformation temperatures of NiTi alloy, the manufacturers alter the phase composition to have a NiTi with new mechanical properties. These mechanical properties can be achieved either by thermal, mechanical treatments or both. Moreover, many machining procedures (e.g. twisting, electrical discharge machining), were developed. The higher flexibility of thermomechanically treated NiTi alloys was found as the main a

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Silva, Marcelo Faria da, Célia Regina Maia Pinzan-Vercelino, and Júlio de Araújo Gurgel. "The influence of distal-end heat treatment on deflection of nickel-titanium archwire." Dental Press Journal of Orthodontics 21, no. 1 (2016): 83–88. http://dx.doi.org/10.1590/2177-6709.21.1.083-088.oar.

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Objective: The aim of this in vitro study was to evaluate the deflection-force behavior of nickel-titanium (NiTi) orthodontic wires adjacent to the portion submitted to heat treatment. Material and Methods: A total of 106 segments of NiTi wires (0.019 x 0.025-in) and heat-activated NiTi wires (0.016 x 0.022-in) from four commercial brands were tested. The segments were obtained from 80 archwires. For the experimental group, the distal portion of each segmented archwire was subjected to heat treatment (n = 40), while the other distal portion of the same archwire was used as a heating-free contr

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WANG, QIANG, YANG ZHANG, FENGYU HAO, KE YANG, and LILI TAN. "COMPARATIVE STUDY OF CLINICALLY USED NiTi ORTHODONTIC WIRES." International Journal of Modern Physics B 24, no. 30 (2010): 5929–37. http://dx.doi.org/10.1142/s0217979210057493.

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The purpose of the study was to comparatively investigate two NiTi orthodontic wires. It is valuable to determine the phase transformation temperature and corrosion characteristics of the orthodontic wires to further study the shape memory effect and corrosion resistance properties. Optical microscope and EDX analysis were used for microstructure characteristics and composition analysis. Differential scanning calorimetry (DSC) was carried out to identify the phase transformation behavior of the two wires. Electrochemical tests in artificial saliva at 37 ±1°C including polarization and electroc

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Marchenko, Ekaterina, Aleksandr Kozulin, Evgeniy Topolnitskiy, Nikolay Shefer, Anna Vetrova, and Marina Kovaleva. "Mechanical behavior of titanium nickelide material under stretch and evaluation of biomechanical compatibility." Russian journal of biomechanics. 28, no. 2 (2024): 41–51. http://dx.doi.org/10.15593/rjbiomech/2024.2.04.

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In this work, the characteristics of the deformation behaviour of metal meshes knitted from thin NiTi wires have been studied and an experimental evaluation of their biological compatibility has been carried out. The experimental stress-strain diagrams obtained fully correspond to the typical tensile diagrams of superelastic NiTi alloys with marten-sitic transformation. The nonlinear dependencies of the stress of the metal mesh knitted from NiTi wire are rheologically similar to hyperelastic materials and differ from the ob-tained stress diagrams of the wire. It was found that the tensegrity s

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Ameli, Nazila, Raheb Ghorbani, Sanaz Asadi, and Zahra Zarrinzade. "Investigation of the effects of orthodontic brackets coated by silver hydroxyapatite, copper oxide, and titanium oxide nanoparticles on wire-bracket friction." APOS Trends in Orthodontics 12 (February 21, 2022): 27–33. http://dx.doi.org/10.25259/apos_105_2021.

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Objectives: Coating orthodontic brackets with metal nanoparticles seem to affect surface roughness and friction. We aim to compare the effects of coating brackets with copper oxide (CuO), titanium dioxide (TiO2), and silver hydroxyapatite (S-HAP) on friction between brackets and various sizes and materials of orthodontic wires. Material and Methods: In this experimental study, we selected four groups of stainless steel (SS) brackets with eight orthodontic wires (SS and nickel-titanium [Niti]) in different sizes. Three groups were coated with CuO, TiO2, and S-HAP nanoparticles using dip coating

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Shao, Yichuan, Mingyang Su, Yaoqiang Wei, et al. "Effect of Heat Treatment on the Vibration Isolation Performance of Axially Symmetric NiTi Wire Mesh Damper." Symmetry 14, no. 10 (2022): 2209. http://dx.doi.org/10.3390/sym14102209.

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In this paper, superelastic (SE) NiTi wire is used to fabricate axially symmetric wire mesh dampers (WMDs) with the expectation of a higher damping capacity. However, the phase transformation damping of the NiTi WMD could be suppressed by the cold-work-induced dislocation. Therefore, the NiTi WMDs were heat-treated and then tested by a hydraulic universal testing machine. The NiTi WMD is found to achieve higher damping capacity when heat-treated at 200 °C. However, the WMD heat-treated at 250 °C suffers from a sharp decline in the loss factor in exchange for an improvement in the stiffness. Th

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Mohamed, Helmi Saleh, Abdultawab Mohamed, and Naseef Hussien. "Evaluation of the Inter-Premolar Width Changes in the Mandible using Three Different Commercial Arch Wires: A Prospective Clinical Study." International Multispeciality Journal of Health 6, no. 12 (2020): 01–08. https://doi.org/10.5281/zenodo.4400162.

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<strong>Abstract</strong><strong>—</strong> <strong>Objective</strong>: The aims of this study is to evaluate the inter-premolar width changes in the mandible using three different commercial orthodontic arch wires. <strong>Subjects and methods</strong>: Thirty patients including both males and females have been allocated in this study. Three orthodontic wires including NiTi, copper NiTi, and Beta-Titanium wires had been used. A special observational technique including CBCT had been used to make an evaluation for the inter-premolar width before and after the aligning stage. <strong>Resu

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Schmeidl, Krzysztof, Michal Wieczorowski, Katarzyna Grocholewicz, Michal Mendak, and Joanna Janiszewska-Olszowska. "Frictional Properties of the TiNbTaZrO Orthodontic Wire—A Laboratory Comparison to Popular Archwires." Materials 14, no. 21 (2021): 6233. http://dx.doi.org/10.3390/ma14216233.

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Background. This study aimed to determine the kinetic frictional force (FF) of the recently produced TiNbTaZrO (Gummetal) orthodontic wire and compare it to the widely used wires of stainless steel (SS), nickel-titanium (NiTi), cobalt-chromium (CoCr) and titanium-molybdenum (TiMo) alloys. Methods. Five types of 0.016″ × 0.022″ wires were ligated with elastic ligatures to 0.018″ × 0.025″ SS brackets. The dynamic FFs between the brackets and ligated wires were measured utilizing a specialized tensile tester machine. Prior sample sizes for different archwires were conducted using power analysis f

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Wadhwa, Rupali Kapur, Hyue Kyung Kwon, and John M. Close. "Frictional resistances of different bracket – wire combinations." Australasian Orthodontic Journal 20, no. 1 (2004): 25–30. http://dx.doi.org/10.2478/aoj-2004-0004.

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Abstract Background: It has been suggested that the frictional resistance of ceramic brackets can be reduced by either lining the slots with stainless steel or by contouring the base of the slot. Objectives: The objectives of this investigation were to compare in vitro the static and kinetic frictional resistances of ceramic brackets with metal lined slots (“Clarity”, CL), stainless steel brackets (“Miniature Twin”, MT), and two ceramic brackets with different slot designs (“Contour”, CO; “Transcend”, TR). Method: Two sizes (0.018 x 0.025 inch; 0.021 x 0.025 inch) of stainless steel (SS), nick

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Albuquerque, Cibele Gonçalves de, Américo Bortolazzo Correr, Giovana Cherubini Venezian, Milton Santamaria Jr, Carlos Alberto Tubel, and Silvia Amélia Scudeler Vedovello. "Deflection and Flexural Strength Effects on the Roughness of Aesthetic-Coated Orthodontic Wires." Brazilian Dental Journal 28, no. 1 (2017): 40–45. http://dx.doi.org/10.1590/0103-6440201700630.

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Abstract The aim was to evaluate the flexural strength and the effects of deflection on the surface roughness of esthetic orthodontic wires. The sample consisted of 70 archwire 0.014-inch: polytetrafluorethylene (PTFE)-coated Nickel-Titanium (Niti) archwires (Titanol Cosmetic-TC, Flexy Super Elastic Esthetic-FSE, esthetic Nickel Titanium Wire-ANT); epoxy resin-coated Niti archwires (Spectra-S, Niticosmetic-TEC); gold and rhodium coated Niti (Sentalloy-STC) and a control group (superelastic Niti (Nitinol-NS). The initial roughness was evaluated with a rugosimeter. After that, the wires were sub

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Isalgue, Antonio, Vicenç Torra, Fabio Casciati, and Sara Casciati. "Fatigue of NiTi for Dampers and Actuators." Advances in Science and Technology 83 (September 2012): 18–27. http://dx.doi.org/10.4028/www.scientific.net/ast.83.18.

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The application of Shape Memory Alloy (SMA) devices to practical uses need well established performance. The reliable application in some areas, as dampers in engineering, needs a known, relatively long fatigue life (some million oscillations). The thermomechanical properties of SMA, based on their martensitic transformation, made them attractive to use for damping, taking advantage of the pseudoelastic window and hysteresis on transforming-retransforming. Due to size effects and to the fact that fatigue failure in metallic NiTi usually comes from a defect inducing crack growth, fatigue has to

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Wichai, Wassana, Rutchadakorn Isarapatanapong, Niwat Anuwongnukroh, and Surachai Dechkunakorn. "Grain Structure and Surface Roughness of Four Commercial NiTi Orthodontic Archwires." Solid State Phenomena 266 (October 2017): 257–63. http://dx.doi.org/10.4028/www.scientific.net/ssp.266.257.

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This study investigated four commercially available NiTi orthodontic archwires from different manufactures for their grain structure and surface roughness.Four commercially available pre-formed NiTi orthodontic archwire (Ormco, Sentalloy, Highland and NIC) with diameter 0.016 x 0.022 inch2 were tested. The wire samples were polished and etched to evaluate the morphology and structure of wire surface. Each NiTi archwire was investigated under a reflected light microscope of an Optical Microscope to analyze its grain structure and size, in longitudinal surfaces. The surfaces of wire were qualita

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Dechkunakorn, Surachai, Rutchadakorn Isarapatanapong, Niwat Anuwongnukroh, Nattiree Chiranavanit, Julathep Kajorchaiyakul, and Anak Khantachawana. "Mechanical Properties of Several NiTi Alloy Wires in Three-Point Bending Tests." Applied Mechanics and Materials 87 (August 2011): 14–19. http://dx.doi.org/10.4028/www.scientific.net/amm.87.14.

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Objective: To clarify mechanical properties of 14 superelastic NiTi orthodontic wires by three-point bending tests. Materials and Methods: The three-point bending test was conducted with a midspan deflection rate of 5 mm/min under constant temperature range 36±1°C. Wires were deflected to 3.1 mm. All data were recorded during the unloading process at deflections 3, 2, 1 and 0.5 mm. to simulate the force a wire exerts as a tooth is moved into the dental arch from a position of malocclusion. Results: The delivered forces changed slightly when the deflection varied during loading and unloading. S

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