Biomechanical Stress Analysis of a Human Femur Bone Using ANSYS

Kumar, K.C. Nithin; Tandon, Tushar; Silori, Praveen; Shaikh, Amir

doi:10.1016/j.matpr.2015.07.211

Cited by 46 publications

(11 citation statements)

References 6 publications

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“…According to finite element analysis, the maximum loads experienced by the human femur bone in standing posture would be less than 40 MPa even for obese people 54 . And for an average human, the maximum loads experienced during activities such as standing, walking, jumping, and running are 29, 35, 39, and 62 MPa, respectively 55 . The hazard function (Figure 7) shows that for loads less than 40 MPa, the probability of failure is almost zero and for loads between 40 and 60 MPa it is less than 10%.…”

Section: Discussionmentioning

confidence: 99%

Three‐dimensional printing of zirconia scaffolds for load bearing applications: Study of the optimal fabrication conditions

et al. 2021

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Yttria‐stabilized zirconia (YSZ) scaffolds with a planned macroporosity fraction of about 70% were fabricated by Robocasting from inks with high solid loadings. The effects of solids loading and the concentrations of processing additives on the flow behavior of the starting suspensions and the viscoelastic properties of the resulting inks were investigated aiming at optimizing the printing process. The shear thinning flow behavior of the starting suspensions containing 45‒48 vol% solids and dispersant concentrations varying within 0.2‒0.8 wt% could be well described by the four‐parameter Cross model. The flow behavior of the suspensions could be correlated with the interaction forces, and the ad‐layer thickness formed around the YSZ particles. Further adding suitable amounts of a binder and a coagulating agent enabled optimizing the viscoelastic properties of inks for 3D printing. Good shape retention was observed for inks with elastic modulus, G′ ≥ 10 MPa. The green scaffolds were dried, sintered at 1350°C, and then used for the assessment of porosity and mechanical properties under compression tests. The porous structures exhibit average compressive strength (σ) of ~70 MPa. Weibull statistics applied to σ data revealed good reliability of the process, which can be used to fabricate YSZ scaffolds for orthopedic applications.

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Section: Discussionmentioning

confidence: 99%

Three‐dimensional printing of zirconia scaffolds for load bearing applications: Study of the optimal fabrication conditions

et al. 2021

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“…These scaffolds can perform extremely well in F I G U R E 2 Schematics of the overall processing steps followed in this work any of the normal physiological activities such as walking, standing, and even in extreme activities such as jumping, running etc., where the maximum loads (~70 MPa) experienced by the femur bone are much lower than σ m . [68][69][70] Moreover, based on the Weibull statistical analysis, the scaffolds can be produced with 99.8% reliability.…”

Section: Density and Mechanical Properties Of Sintered Scaffoldsmentioning

confidence: 99%

Robocasting and surface functionalization with highly bioactive glass of ZrO₂ scaffolds for load bearing applications

et al. 2021

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This work is a proof of concept for making load bearing implants with osseointegration and bone bonding ability. Yttria-stabilized zirconia (YSZ) scaffolds with a percentage of macro porosity of about 70% were fabricated by robocasting. Although a maximum solids volume fraction of 50 vol.% could be achieved, the 3D-printing process revealed to be more reliable when using inks with 48 vol.% solids. The sin-

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“…Se utilizaron los andamios equivalentes en cada etapa para los siguientes análisis; el primero que consistió en la colocación de cargas en la rodilla, mientras la cabeza femoral se mantiene fija, evitando movimientos traslacionales. Las cargas aplicadas en la parte inferior son tomadas del trabajo de Kumar et al [31], donde se coloca una fuerza de 750 N y un momento de 10000 N mm correspondiéndose a una simplificación de las cargas de una persona caminando. En ese trabajo [31] Fuente: [24].…”

Section: Estudio Del Ensamble Fémur-andamio-placa De Osteosíntesisunclassified

“…Las cargas aplicadas en la parte inferior son tomadas del trabajo de Kumar et al [31], donde se coloca una fuerza de 750 N y un momento de 10000 N mm correspondiéndose a una simplificación de las cargas de una persona caminando. En ese trabajo [31] Fuente: [24].…”

Section: Estudio Del Ensamble Fémur-andamio-placa De Osteosíntesisunclassified

Metodología para el diseño computacional de andamios a ser utilizados en reparación ósea

Reboledo-Grau¹,

Martínez²

2020

revuin

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Los andamios son unas estructuraspersonalizadas, cuyo diseño influye en elcrecimiento celular para la reparación del tejido. Sin embargo, aún se encuentran en constante estudio para lograr todos los requerimientos biológicos. En este trabajo se propone una metodología y se evalúanuméricamente, utilizando el método de los elementos finitos, el comportamiento devarios diseños de andamio, Se evalúan diferentes geometrías variando el material (Titanio-Aluminio-Vanadio (Ti6Al4V) y ácido L poliláctico (PLLA) y tamaño del poro. Posteriormente, después de seleccionar los diseños más acordes con la rigidez de la estructura ósea donde se implantarán, se evaluó la viabilidad delos andamios en un ensamble andamio-hueso-placa endos etapasde sanación. La inicial, cuando no hay hueso dentro del andamio, y la final de reparación, cuando el andamio está lleno de material óseo. Para su evaluación, se propuso una geometría de andamio equivalente utilizando técnicas básicas de homogenización. Se observóque el hueso dentro del andamio de Ti6Al4V, aumenta significativamente las propiedades mecánicas de la zona, pudiendo generarse importantes zonas de concentración de esfuerzo. Esto pone en evidencia la conveniencia de que el andamio sea biodegradable para evitar lesiones posteriores al paciente, debido a la diferencia de rigidez a lo largo del fémur.En esta evaluación se tomaron en cuenta solamente dos materiales biocompatibles como lo son elTi6Al4V yelácido L poliláctico (PLLA)(biodegradable).La selección de estos obedeció a la amplia información que existe en la literatura sobre esta afirmación más que a un estudio riguroso de las propiedades de estos.

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Biomechanical Stress Analysis of a Human Femur Bone Using ANSYS

Cited by 46 publications

References 6 publications

Three‐dimensional printing of zirconia scaffolds for load bearing applications: Study of the optimal fabrication conditions

Three‐dimensional printing of zirconia scaffolds for load bearing applications: Study of the optimal fabrication conditions

Robocasting and surface functionalization with highly bioactive glass of ZrO₂ scaffolds for load bearing applications

Metodología para el diseño computacional de andamios a ser utilizados en reparación ósea

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Biomechanical Stress Analysis of a Human Femur Bone Using ANSYS

Cited by 46 publications

References 6 publications

Three‐dimensional printing of zirconia scaffolds for load bearing applications: Study of the optimal fabrication conditions

Three‐dimensional printing of zirconia scaffolds for load bearing applications: Study of the optimal fabrication conditions

Robocasting and surface functionalization with highly bioactive glass of ZrO2 scaffolds for load bearing applications

Metodología para el diseño computacional de andamios a ser utilizados en reparación ósea

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Robocasting and surface functionalization with highly bioactive glass of ZrO₂ scaffolds for load bearing applications