Compressive behaviour of child and adult cortical bone

Öhman, Caroline; Baleani, Massimiliano; Pani, Carla; Taddei, Fulvia; Alberghini, Marco; Viceconti, Marco; Manfrini, Marco

doi:10.1016/j.bone.2011.06.035

Cited by 136 publications

(84 citation statements)

References 64 publications

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“…The compressive results from the present study seem to agree with Ohman et al [43], who found the compressive strength of an adult bone to be 191.4 MPa. However, they mixed femur and tibia specimens and presented them as a single average value.…”

Section: Comparison Of Mechanical Response Of Tibia and Femursupporting

confidence: 92%

“…Reilly and Burstein [27] observed an orientation dependence on the modulus of cortical bone at quasistatic rate; the longitudinal modulus was 17.0 GPa, and the transverse modulus was 11.5 GPa. Ohman et al [43] investigated the longitudinal compressive behavior of femur and tibia, and found a combined average compressive modulus of 17.7 GPa. The strain rate dependence on modulus in the current study also differed from published dynamic data.…”

Section: Elastic Modulusmentioning

confidence: 99%

See 1 more Smart Citation

Orientation Dependent Compressive Response of Human Femoral Cortical Bone as a Function of Strain Rate

Weerasooriya

Sanborn

Gunnarsson

et al. 2016

J. dynamic behavior mater.

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Under extreme environments, such as a blast or impact event, the human body is subjected to high-rate loading, which can result in damage such as torn tissues and broken bones. The ability to numerically simulate these events would help improve the design of protective gear by iterating different configurations of protective equipment to reduce injuries. Computer codes capable of simulating these events require accurate rate-dependent material models representing the material deformation and failure (or injury) to properly predict the response of human body during simulation. Therefore, the high-rate material response must be measured to allow for simulation of high-rate events. This study seeks to quantify the highrate mechanical response of human femoral cortical bone for use in high fidelity human anatomical models. Cortical bone compression specimens were extracted from the longitudinal and transverse directions relative to the long axis of the femur from three male donors, ages 36, 43, and 50. The compressive behavior of the cortical bone was studied at quasi-static (0.001/s), intermediate (1/s), and dynamic (*1000/s) strain rates using a split-Hopkinson pressure bar to determine the strain rate dependency and anisotropic effect on the strength of bone. The results indicate that cortical bone is anisotropic and stronger in the longitudinal direction compared to the transverse direction.The human cortical bone compressive response was also rate dependent in both directions, demonstrating significant increase in strength with increase in strain rate. Additionally, as the strain rate increased from intermediate to dynamic, a decrease in the elongation at transverse orientation was observed, which would indicate the bone becomes more brittle.

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Section: Comparison Of Mechanical Response Of Tibia and Femursupporting

confidence: 92%

Section: Elastic Modulusmentioning

confidence: 99%

Orientation Dependent Compressive Response of Human Femoral Cortical Bone as a Function of Strain Rate

Weerasooriya

Sanborn

Gunnarsson

et al. 2016

J. dynamic behavior mater.

View full text Add to dashboard Cite

show abstract

“…The mechanical properties essentially define the suitability and successful application of mechanically optimized structures, such as bone substitutes, in biomedical fields [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Single Ti6Al4V Struts Made Using Selective Laser Melting and Electron Beam Melting Subject to Part Orientation

Weißmann

Drescher

Bader

et al. 2017

Metals

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Abstract:The use of additive manufacturing technologies to produce lightweight or functional structures is widespread. Especially Ti 6 Al 4 V plays an important role in this development field and parts are manufactured and analyzed with the aim to characterize the mechanical properties of open-porous structures and to generate scaffolds with properties specific to their intended application. An SLM and an EBM process were used respectively to fabricate the Ti 6 Al 4 V single struts. For mechanical characterization, uniaxial compression tests and hardness measurements were conducted. Furthermore, the struts were manufactured in different orientations for the determination of the mechanical properties. Roughness measurements and a microscopic characterization of the struts were also carried out. Some parts were characterized following heat treatment (hot isostatic pressing). A functional correlation was found between the compressive strength and the slenderness ratio (λ) as well as the equivalent diameter (d) and the height (L) of EBM and SLM parts. Hardness investigations revealed considerable differences related to the microstructure. An influence of heat treatment as well as of orientation could be determined. In this work, we demonstrate the influence of the fabrication quality of single struts, the roughness and the microstructure on mechanical properties as a function of orientation.

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“…Material properties and numbers of elements are listed in Table 1. Ohman et al (2011) found that children's femoral cortical bone had significant lower compressive Young's modulus (-34%) and yield stress (-38%), but higher compressive ultimate strain (+24%) than the adult bone tissue. Therefore models with bone mechanical properties of a child were also created.…”

Section: Model Generationmentioning

confidence: 93%

“…Malformations of the joint may lead to elevated cartilage contact stresses increasing the risk of developing OA [4]. Human in vivo studies of the hip joint are important to increase our knowledge regarding the mechanics leading to OA, but they are difficult and unethical to conduct.…”

Section: Introductionmentioning

confidence: 99%

Using a Finite Element Pediatric Hip Model in Clinical Evaluation - A Feasibility Study

Skytte

Mikkelsen

Sonne‐Holm

et al. 2017

J Bioengineer & Biomedical Sci

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The paper describe a method to construct a finite element model of the hip joint of a child based on clinical recorded CT data. A model which can be used for diagnostic aid and pre-operative surgical evaluation. First part of this development is a feasibility study of this method. A scan of the asymptomatic left hip of a 10-year-old girl with a dysplastic right hip was used. Cartilage was not visible why it was modeled as an interaction with constant thickness between two surfaces. For every point on the acetabular and femoral bone surfaces, the shortest distance to the other surface was used to calculate the resulting stress in the normal direction. At a load of 233% BW the model predicted peak pressures in the hip joint of 9.7-13.8 MPa and an area in contact of 351-405 mm 2 . Experimental validation using the hip joint of a child was not ethical viable. Instead, our results were compared to previous published experimental studies and computational models investigating the adult hip joint. Good correlation between the current model and previous models were found. The current case specific modeling technique may be a useful complement to the previously developed hip models.

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Compressive behaviour of child and adult cortical bone

Cited by 136 publications

References 64 publications

Orientation Dependent Compressive Response of Human Femoral Cortical Bone as a Function of Strain Rate

Orientation Dependent Compressive Response of Human Femoral Cortical Bone as a Function of Strain Rate

Comparison of Single Ti6Al4V Struts Made Using Selective Laser Melting and Electron Beam Melting Subject to Part Orientation

Using a Finite Element Pediatric Hip Model in Clinical Evaluation - A Feasibility Study

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