XRD Study of NiTi Endodontic Files Using Synchrotron Radiation

Fernandes, Francisco Manuel Braz; Oliveira, J.P.; Machado, A.; Schell, N.

doi:10.1007/s11665-014-1056-y

Cited by 11 publications

(11 citation statements)

References 21 publications

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“…While the Nitinol alloys provide the capability to follow the contours of the dental canal better than other available alloys due to its elastic qualities, the propensity to fracture under flexion/rotation is a significant concern. 209 Multiple investigators have studied bending and rotating fatigue in endodontic files and wires reporting effects related to file geometry, 209 processing, 22,61 composition, 210,211 radius of curvature, 212 torsional loading 213,214 and rate. 70 A few studies on wires and files are briefly discussed in this section in addition to fatigue testing on archwires.…”

Section: Mechanical Property Datamentioning

confidence: 99%

Fatigue and fracture of wires and cables for biomedical applications

Gbur

Lewandowski

2016

International Materials Reviews

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Fine wires and cables play a critical role in the design of medical devices and subsequent treatment of a large array of medical diagnoses. Devices such as guide wires, catheters, pacemakers, stents, staples, functional electrical stimulation systems, eyeglass frames and orthodontic braces can be comprised of wires with diameters ranging from 10s to 100s of micrometres. Reliability is paramount as part of either internal or external treatment modalities. While the incidence of verified fractures in many of these devices is quite low, the criticality of these components requires a strong understanding of the factors controlling the fracture and fatigue behaviour. 1,2 Additionally, optimisation of the performance and reliability of these devices necessitates characterisation of the fatigue and fracture properties of its constituent wires. A review of cable architecture and stress states experienced during testing is followed by an overview of the effects of changes in material composition, microstructure, processing and test conditions on fracture and fatigue behaviour of wire and cable systems used in biomedical applications. The review concludes with recommendations for future work.

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Section: Mechanical Property Datamentioning

confidence: 99%

Fatigue and fracture of wires and cables for biomedical applications

Gbur

Lewandowski

2016

International Materials Reviews

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“…Bent files showed peaks due to stress-induced martensite, as expected, especially intense in the region of maximum stresses of the bent files. The intensity of the martensitic peaks is higher for MTwo files and this has been proved to be related to the influence of the geometry of the cross-section on the stress distribution along the files during bending [16]. However, based on the higher M s value observed for K3XF file, it is expected that K3XF should be more flexible than MTwo and K3 and therefore should show improved cyclic fatigue resistance [9,10,17].…”

Section: X-ray Diffraction Measurementsmentioning

confidence: 99%

Effect of heat treatment on K3, K3XF and MTwo endodontic files

Fernandes

Oliveira

Machado

et al. 2015

MATEC Web of Conferences

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Abstract. The purpose of this study was to evaluate the effect of heat treatment on the transformation temperatures of K3, K3XF and MTwo endodontic files. DSC was used to investigate the domains of transformation temperatures and how the transformation temperatures vary along the file. The files were analysed as received and subjected to heat treatment. X-ray diffraction analysis was also used to investigate the stress-induced martensite transformation on the files under flexion. The results show that heat treatment influences the transformation temperatures and that under flexion, the conditions and situations in which files present a stress-induced martensite transformation can be identified.

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“…In recent years, much research has been invested in this domain. With an increased understanding of the deformation mechanism of Ni-Ti alloys, their application in the aerospace, automation, medical and other elds should rise [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Integrated Ni-Ti Alloys Possessing Both Super-elastic and Shape Memory Properties by Laser Powder Bed Fusion

Shen

2021

Preprint

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Purpose: Integrated Ni-Ti alloys possessing both super-elastic (SE) properties and shape memory effects (SMEs) greatly increase the flexibility of designing complex systems and have broad application prospects. However, existing research mainly focuses on connecting ready-made SE parts and SME parts though welding. Method: In this paper, laser powder bed fusion (LPBF) was used to fabricate integrated Ni-Ti alloys. First, SE parts with high relative density were fabricated with a Ni-rich powder. Then, different process parameters were used to fabricate the SME parts with a Ti-rich powder based on the SE parts. The integrated component with the best mechanical properties herein was selected. Metallographic analysis, energy dispersive X-ray spectroscopy, differential scanning calorimetry and micro-hardness analyses were carried out for this sample. Findings: The results show that the integrated component possessed both SE and SME properties at room temperature. Moreover, at the junction of the two materials, the grains were continuous and complete, which indicates that the joint had good quality. Originality: Our work confirms that LPBF is a feasible method to fabricate integrated Ni-Ti alloys possessing both SE and SME properties.

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XRD Study of NiTi Endodontic Files Using Synchrotron Radiation

Cited by 11 publications

References 21 publications

Fatigue and fracture of wires and cables for biomedical applications

Fatigue and fracture of wires and cables for biomedical applications

Effect of heat treatment on K3, K3XF and MTwo endodontic files

Fabrication of Integrated Ni-Ti Alloys Possessing Both Super-elastic and Shape Memory Properties by Laser Powder Bed Fusion

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XRD Study of NiTi Endodontic Files Using Synchrotron Radiation

Cited by 11 publications

References 21 publications

Fatigue and fracture of wires and cables for biomedical applications

Fatigue and fracture of wires and cables for biomedical applications

Effect of heat treatment on K3, K3XF and MTwo endodontic files

Fabrication of Integrated Ni-Ti&nbsp;Alloys Possessing Both Super-elastic and Shape Memory Properties by Laser Powder Bed Fusion

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Fabrication of Integrated Ni-Ti Alloys Possessing Both Super-elastic and Shape Memory Properties by Laser Powder Bed Fusion