A finite element study of fatigue load effects on total hip joint prosthesis

Aghili, Seyed Arvin; Hassani, Kamran; Nikkhoo, Mohammad

doi:10.1080/10255842.2021.1900133

Cited by 7 publications

(7 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In consideration of this, and exploiting Eqs. (3)(4)(5)(6), a set of proposed optimized values of process parameters as a function selected values of threedimensional surface roughness are proposed in Table 12.…”

Section: Discussionmentioning

confidence: 99%

“…Focusing on metallic biocompatible materials, the most employed are stainless steels, cobalt-chromium, and titanium alloys. Amongst these latter, Ti-6Al-4V was indicated by Aghili et al [5] as the most widely used for biomedical applications, in particular for joints and bones replacement, and dental implants. The high degree of diffusion of Ti-6Al-4V alloy in biomedical field is due to the combination of its biocompatibility, corrosion resistance and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A feasibility study of promoting osseointegration surface roughness by micro-milling of Ti-6Al-4V biomedical alloy

Cappellini

Malandruccolo

Abeni

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

The reliability of a prosthetic implant needs durability, biocompatibility, and osseointegration capability. Accomplishing these characteristics, Ti-6Al-4V alloy is the main used material for implant fabrication. Moreover, it can be processed by additive manufacturing technique, permitting to meet the needs of patience-tailored, often complex shaped, prosthesis topologies. Once an implant is realized, it is finished by machining operations and its osseointegration capability is heavily influenced by the resulting surface roughness. Consequently, the assessment of this latter is mandatory to evaluate the prosthesis durability. This paper presents the analysis of surface roughness of Ti-6Al-4V micro-milled specimens produced by plastic deformation, selective laser melting, and electron beam melting processes. A central composite design was employed for planning the cutting tests. The comparison between surface roughness results and its values for enhancing osseointegration, firstly permitted to individuate the range of micro-milling suitable applications, which have been individuated as ball joints, bone plates, and screws. Next, the statistical analysis of the experimental measurements allowed the identification of the most influential micro-milling parameters together with the determination of the mathematical models of surface roughness by response surface methodology. The good comparison among calculated and experimental results revealed the reliability of the model, allowing the prediction of achievable surface roughness once micro-machining parameters are selected, or their optimization as a function of a desired surface roughness value.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A feasibility study of promoting osseointegration surface roughness by micro-milling of Ti-6Al-4V biomedical alloy

Cappellini

Malandruccolo

Abeni

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…A hip implant was designed and different materials combinations were used for the fatigue analysis along with the femur which is modelled using the CT scan of a 72-year healthy person. They have found titanium is more advantageous based on lower stress concentration, resulting in longer life of the designed implant [37]. Fatigue studies in hip implants have been previously studied, however, a detailed study on the dif-ferent shapes and profiles of implants with different material combinations are not carried out and this gap is bridged by this present work that adds uniqueness to this study.…”

Section: Introductionmentioning

confidence: 93%

“…The fatigue analysis of the hip implants that are the focus of this in silico study is carried out as per the fatigue test conditions with maximum and minimum loads of 2300 N and 300 N [36]. Goodman's mean stress theory is utilized for fatigue analysis [28,37]. The safety factor is calculated based on equation (1).…”

Section: Meshing and Boundary Conditionsmentioning

confidence: 99%

Fatigue life evaluation of different hip implant designs using finite element analysis

Corda,

Chethan,

Shenoy

et al. 2023

J Appl Eng Science

View full text Add to dashboard Cite

Fatigue failure is one of the causes of the failure of hip implants. The main objective of this work is to carry out fatigue failure analysis on different hip profiles and compare the outcomes for various combinations of materials. Three profiles each for circular, oval, elliptical, and trapezoidal stems are utilized for this study with four different material combinations consisting of materials like Ti–6Al–4V, CoCr Alloy and UHMWPE. CATIA V-6 is used for the modelling of these implants and the fatigue analysis using Goodman's mean stress theory is simulated using ANSYS 2022 R1. ISO 7206-4 and ASTM F2996-13 standards are used to define the boundary conditions. A total of 48 combinations were studied across four different shapes, three different profiles and four different material combi-nations to deduce the best possible combination for a hip implant for static and fatigue loading. Comparison of the implants is based on the factors like equivalent von Mises stress, displacement, equivalent elastic strain, fatigue life, safety factor and equivalent alternating stress. Profile 2 of the trapezoidal-shaped hip implant with a Ti–6Al–4V stem exhibited superior results both under static and fatigue loading conditions. Compared to displacements obtained for profiles one and three, profile 2 trapezoidal stem with Ti–6Al–4V and other parts as CoCr Alloy has about 72% lower displacement. Based on the findings, profile 2 with a trapezoidal stem made of Ti–6Al–4V and an acetabular cup made of CoCr shows the enhanced results over the other combinations considered.

show abstract

“…For guaranteeing this permanence, implants' materials must own intense resistance to corrosion in body fluids, high strength, wear and fatigue resistance, together with low density and elastic modulus [3]. Amongst metallic biocompatible materials answering to these requirements, Ti-6Al-4V titanium alloy is the most employed for bone and dental replacements [4]. This is related to its characteristics of bio-inertness [5], passivation by titanium dioxide (TiO2) layer formation [6], for avoiding inflammatory reactions, appropriate weight distribution in the human body by high strength-weight ratio [7], paramagnetism, limited stress yielding phenomena [3], osseointegration enhancement due to cementless joints creation [7], and high fatigue strength, mandatory in the normal body-cyclic load conditions [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Ti-6Al-4V micro-milling resulting surface roughness for osteointegration enhancement

Cappellini

2023

Materials Research Proceedings

View full text Add to dashboard Cite

Abstract. In the last period, the demand of prostheses has massively increased. To guarantee their reliability, properties of durability, biocompatibility, and osseointegration results to be mandatory. Possessing these attributes, Ti-6Al-4V alloy represents the most employed material for implants realization, and because of its microstructure, it can be manufactured by different processing methods, i.e., machining, and additive manufacturing. Considering the necessity of patient-tailored implants, and the capability of additive manufacturing to produce single batch, and complex shapes, at relatively low cost and short time, this latter represents a rewarding process. Compared to biocompatibility, that is mainly function of material chemistry, durability and osteointegration concern mostly surface roughness that affects cells growth at bone-prosthesis interface. After additive manufacturing process and prior to be inserted in the human body, a prosthetic implant is finished by machining operations, hence, the attainment of an appropriate resulting surface roughness is crucial for obtaining a successful implant. Thus, roughness forecasting capability, as a function of the employed finishing process, permits its optimization, avoiding expensive scraps. For this reason, this paper deals with the development of predictive models of surface roughness when micro-milling Ti-6Al-4V alloy specimens.

show abstract

A finite element study of fatigue load effects on total hip joint prosthesis

Cited by 7 publications

References 21 publications

A feasibility study of promoting osseointegration surface roughness by micro-milling of Ti-6Al-4V biomedical alloy

A feasibility study of promoting osseointegration surface roughness by micro-milling of Ti-6Al-4V biomedical alloy

Fatigue life evaluation of different hip implant designs using finite element analysis

Analysis of Ti-6Al-4V micro-milling resulting surface roughness for osteointegration enhancement

Contact Info

Product

Resources

About