Investigation of Fatigue Behaviour and Notch Sensitivity of Ti-6Al-4V

Hosseini, Shabnam; Limooei, Mohammad Bagher

doi:10.4028/www.scientific.net/amm.80-81.7

Cited by 9 publications

(16 citation statements)

References 6 publications

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“…The Von Mises stress was always lower than the yield strength of the titanium alloy in all designs, suggesting no plastic deformation of the implant. In terms of resistance to fatigue failure, the admissible strain, defined as the ratio between the yield strength and the Young's modulus, was lower than the maximum strain in all implant designs.…”

Section: Resultsmentioning

confidence: 89%

Strain shielding inspired re‐design of proximal femoral stems for total hip arthroplasty

Cilla

Checa

Duda

2017

Journal Orthopaedic Research

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A large number of hip prosthesis with different designs have been developed. However, the influence of hip implant design changes on the strains induced in the bone remains unclear. The purpose of this study is to better understand the mechanics of short stem total hip arthroplasty. Specifically, it investigates whether strain shielding can be avoided by changing implant shape and/or material properties. It is hypothesized that the re-design of existing implant designs can result in further reduction of strain shielding and thus keep bone loss minimal following total hip replacement. Finite element methods were used to compare healthy and implanted models. The local mechanics strains/stresses in the intact and implanted femurs were determined under patient-specific muscle and joint contact forces. Results suggest that small changes in implant geometry and material properties have no major effect on strain shielding. Furthermore, it was found that improvement depends on a dramatic re-design of the original implant design. Whereas the benefit of this strategy of modification of the original geometry of a given short-stemmed hip consists in reduced bone remodeling, care should be taken with regard to long-term bone anchorage and implant fatigue strength. It is also shown that geometrical and material changes have a limited potential in avoiding strain shielding even in short-stemmed implants. Finally, it is suggested that an understanding of the influence of these changes on the strain distribution within the bone can guide in the process of optimizing the current stem designs toward minimal strain shielding effects. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2534-2544, 2017.

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Section: Resultsmentioning

confidence: 89%

Strain shielding inspired re‐design of proximal femoral stems for total hip arthroplasty

Cilla

Checa

Duda

2017

Journal Orthopaedic Research

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“…It equal 0.67% for human cortical bone and only titanium alloys can match this figure. Another concern of the engineer is damage tolerance [2].…”

Section: Fatigue Of Biomaterialsmentioning

confidence: 99%

“…Titanium continues to be widely used in biomedical applications. Ti-6Al-4V alloy is the most frequently used these days [2].…”

Section: Introductionmentioning

confidence: 99%

“…In orthopedic implants design, it is unavoidable the presence of geometrical fillets such as notches which cause stress locally. It's necessary to pay attention these notches, because they affect on fatigue resistance [4]. In addition about fatigue ratio, fatigue notch factor, notch sensitivity and effect of ultimate strength and notch size on the fatigue strength of Ti-6Al-4V will be discussed.…”

Section: Introductionmentioning

confidence: 99%

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Fatigue of Ti-6Al-4V

Hosseini¹

2012

Biomedical Engineering - Technical Applications in Medicine

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“…Nickel-titanium alloy (Nitinol, shape memory alloy) has been used in the treatment of cardiovascular implants [26][27][28][29][30]. The combination of the high corrosion resistance, the tensile strength, the flexibility, and the biocompatibility, is the reason of widespread and successful application of titianium and its alloys in modern implantology [31][32][33][34]. The mentioned outstanding corrosion resistance of Ti and its alloys is a consequence of the passivation oxide layer spontaneous formation.…”

Section: Introductionmentioning

confidence: 99%

1D Titania Nanoarchitecture as Bioactive and Photoactive Coatings for Modern Implants: A Review

Radtke¹

2017

Application of Titanium Dioxide

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The research efforts in understanding the influence of TiO 2 1D nanoarchitecture structure and morphology on its biological and photocatalytic activity absorbed a lot of attention during last few years. Nowadays, the application of TiO 2 coatings in biomedical technologies (e.g., in modern implantology) requires the material of strictly defined structure and morphology, possessing both high biocompatibility, as well as antimicrobial properties. The presented review is a compilation of interdisciplinary knowledge about the application of 1D TiO 2 nanostructural coatings (nanotubes, nanofibres, nanowires) in biomedical technologies. The methods and parameters of their synthesis, and the physicochemical techniques used in the characterization of their structure and morphology, are discussed. Moreover, their ability to be applied as innovative coatings for modern implants is presented.

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Investigation of Fatigue Behaviour and Notch Sensitivity of Ti-6Al-4V

Cited by 9 publications

References 6 publications

Strain shielding inspired re‐design of proximal femoral stems for total hip arthroplasty

Strain shielding inspired re‐design of proximal femoral stems for total hip arthroplasty

Fatigue of Ti-6Al-4V

1D Titania Nanoarchitecture as Bioactive and Photoactive Coatings for Modern Implants: A Review

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