A study of mechanical and biological behavior of porous Ti6Al4V fabricated on EBM

Petrovi, Vanja; Blasco, José Ramón; Portolés, Luis; Morales, Isabel del Hierro; Primo, Víctor A.; Atienza, Carlos; Moreno, José María Calderón; Belloch, V

doi:10.1201/b11341-21

Cited by 8 publications

(11 citation statements)

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“…The most important details of the experimental procedure are depicted below. More details may be found in (Petrović et al 2012).…”

Section: Experimental Datamentioning

confidence: 99%

“…The strut diameter was assumed to vary according to a normal distribution. The mean strut diameter for each sample set (µ D ) was taken as measured in the previous study of Petrović et al (2012). Values are shown in Table 1.…”

Section: Strut Diameter Variationmentioning

confidence: 99%

“…As what concerns the strut diameter variation (Dvar), the mean value, as measured by Petrović et al (2012), is shown in Table 1. Then, as explained in section 2.2.1, a maximum Dvar of ±200 µm was considered, and a standard deviation of 75 µm was used for the normal distribution.…”

Section: Characterization Of Manufacturing Irregularitiesmentioning

confidence: 99%

“…8 Comparison of S Y,ap (plain bars) and E ap (hatched bars) obtained from experimental tests (Exp) and from FE simulations including the three manufacturing irregularities (Sim) for the three sets (S450P600, S450P700 and S450P800) were assumed to be the same as for the measured sample (S450P700). The strut and pore diameter values were taken from Petrović et al (2012) and are shown in Table 1. Fig.…”

Section: Simulation Of the Other Sample Setsmentioning

confidence: 99%

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Finite element modeling of manufacturing irregularities of porous materials

Gonzalez¹,

Nuño²

2016

Biomaterials and Biomechanics in Bioengineering

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Well-ordered porous materials are very promising in orthopedics since they allow tailoring the mechanical properties. Finite element (FE) analysis is commonly used to evaluate the mechanical behavior of well-ordered porous materials. However, FE results generally differ importantly from experimental data. In the present article, three types of manufacturing irregularities were characterized on an additive manufactured porous titanium sample having a simple cubic unit-cell: strut diameter variation, strut inclination and fractured struts. These were included in a beam FE model. Results were compared with experimental data in terms of the apparent elastic modulus (Eap) and apparent yield strength (SY,ap). The combination of manufacturing irregularities that yielded the closest results to experimental data was determined. The idealized FE model resulted in an Eap one order of magnitude larger than experimental data and a SY,ap almost twice the experimental values. The strut inclination and fractured struts showed the strongest effects on Eap and SY,ap, respectively. Combining the three manufacturing irregularities produced the closest results to experimental data. The model also performed well when applied to samples having different structural dimensions. We recommend including the three proposed manufacturing irregularities in the FE models to predict the mechanical behavior of such porous structures.

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“…The most important details of the experimental procedure are depicted below. More details may be found in (Petrović et al 2012).…”

Section: Experimental Datamentioning

confidence: 99%

Section: Strut Diameter Variationmentioning

confidence: 99%

Section: Characterization Of Manufacturing Irregularitiesmentioning

confidence: 99%

Section: Simulation Of the Other Sample Setsmentioning

confidence: 99%

See 2 more Smart Citations

Finite element modeling of manufacturing irregularities of porous materials

Gonzalez¹,

Nuño²

2016

Biomaterials and Biomechanics in Bioengineering

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“…19 Further, the biological response of different EBM-produced material have been evaluated using different animal models. [19][20][21][22][23] Thomsen et al 23 studied the early bone response of solid machined and solid as produced EBM Ti6Al4V material in rabbits. The results of the EBM materials were compared to control implants consisting of conventionally wrought and machined Ti6Al4V.…”

Section: Introductionmentioning

confidence: 99%

Long-term biocompatibility and osseointegration of electron beam melted, free-form–fabricated solid and porous titanium alloy: Experimental studies in sheep

Palmquist

Snis²,

Emanuelsson

et al. 2013

J Biomater Appl

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The purpose of the present study was to evaluate the long-term osseointegration and biocompatibility of electron beam melted (EBM) free-form-fabricated (FFF titanium grade 5 (Ti6Al4V) implants. Porous and solid machined cylindrical and disk-shaped implants were prepared by EBM and implanted bilaterally in the femur and subcutaneously in the dorsum of the sheep. After 26 weeks, the implants and surrounding tissue were retrieved. The tissue response was examined qualitatively and quantitatively using histology and light microscopic (LM) morphometry. Selected bone implants specimens were evaluated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and micro-computed tomography (mCT). The results showed that both porous and solid implants were osseointegrated and high bone-implant contact was observed throughout the porous implant. In the soft tissue, the porous implants showed thinner fibrous encapsulation while no signs of intolerance were observed for either implant type. Taken together, the present experimental results show that FFF Ti6Al4V with and without porous structures demonstrate excellent long-term soft tissue biocompatibility and a high degree of osseointegration. The present findings extend earlier, short-term experimental observations in bone and suggest that EBM, FFF Ti6Al4V implants possess valuable properties in bone and soft tissue applications.

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