Relationship between the shape and density distribution of the femur and its natural frequencies of vibration

Campoli, Gianni; Baka, Nóra; Kaptein, Bart L; Valstar, Edward R.; Zachow, Stefan; Weinans, Harrie; Zadpoor, Amir A.

doi:10.1016/j.jbiomech.2014.08.008

Cited by 14 publications

(6 citation statements)

References 65 publications

(66 reference statements)

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“…These updated FE models using vibro-acoustic techniques are valuable in research areas using vibrational measurement methods, such as the assessment of bone healing [38,39], the assessment of the influence of fixation [40] or shape and density distribution [41] of bone models on their natural frequencies and implant stability assessment [34,[42][43][44][45].…”

Section: Discussionmentioning

confidence: 99%

The Use of a Vibro-Acoustic Based Method to Determine the Composite Material Properties of a Replicate Clavicle Bone Model

Goossens

Vancleef

Leuridan

et al. 2020

JFB

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Replicate bones are widely used as an alternative for cadaveric bones for in vitro testing. These composite bone models are more easily available and show low inter-specimen variability compared to cadaveric bone models. The combination of in vitro testing with in silico models can provide further insights in the evaluation of the mechanical behavior of orthopedic implants. An accurate numerical representation of the experimental model is important to draw meaningful conclusions from the numerical predictions. This study aims to determine the elastic material constants of a commonly used composite clavicle model by combining acoustic experimental and numerical modal analysis. The difference between the experimental and finite element (FE) predicted natural frequencies was minimized by updating the elastic material constants of the transversely isotropic cortical bone analogue that are provided by the manufacturer. The longitudinal Young’s modulus was reduced from 16.00 GPa to 12.88 GPa and the shear modulus was increased from 3.30 GPa to 4.53 GPa. These updated material properties resulted in an average natural frequency difference of 0.49% and a maximum difference of 1.73% between the FE predictions and the experimental results. The presented updated model aims to improve future research that focuses on mechanical simulations with clavicle composite bone models.

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Section: Discussionmentioning

confidence: 99%

The Use of a Vibro-Acoustic Based Method to Determine the Composite Material Properties of a Replicate Clavicle Bone Model

Goossens

Vancleef

Leuridan

et al. 2020

JFB

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“…Fig. 7 PSD ratio comparing the PSD bandpower of the peripheral, lateral and medial loosened case to the average PSD bandpower of the fully cemented cases at corresponding implant measurement locations (1)(2)(3)(4)(5)(6)(7)(8)(9). An increase in the PSD bandpower is observed for those measurement locations closest to the loosened areas of the different loosened cases, allowing to localize the areas where loosening has occurred.…”

Section: Figmentioning

confidence: 99%

“…Furthermore, increases in PSD bandpower, as expressed by the PSD ratio, at certain implant measurement locations allowed localization of the loosened regions. Although the effect of important sources of variability such as material parameters on the vibrational behavior of the tibia was investigated, the influence of other parameters such as; cortical bone thickness, density distributions, shape changes… could likewise be assessed in future work using techniques like statistical shape modelling [5] or Monte Carlo simulations [33].…”

mentioning

confidence: 99%

Vibration-based fixation assessment of tibial knee implants: A combined in vitro and in silico feasibility study

Leuridan

Goossens

Sloten

et al. 2017

Medical Engineering & Physics

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The preoperative diagnosis of loosening of cemented tibial knee implants is challenging. This feasibility study explored the basic potential of a vibration-based method as an alternative diagnostic technique to assess the fixation state of a cemented tibia implant and establish the method's sensitivity limits. A combined in vitro and in silico approach was pursued. Several loosening cases were simulated. The largest changes in the vibrational behavior were obtained in the frequency range above 1500 Hz. The vibrational behavior was described with two features; the frequency response function and the power spectral density band power. Using both features, all experimentally simulated loosening cases could clearly be distinguished from the fully cemented cases. By complementing the experimental work with an in silico study, it was shown that loosening of approximately 14% of the implant surface on the lateral and medial side was detectable with a vibration-based method. Proximal lateral and medial locations on the tibia or locations toward the edge of the implant surface measured in the longitudinal direction were the most sensitive measurement and excitation locations to assess implant fixation. These results contribute to the development of vibration-based methods as an alternative follow-up method to detect loosened tibia implants.

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“…The outcome of the study showed that fixed-fixed condition gives more closed results to the experimental study than free-free condition. There are several other studies about FEA of human bone [18][19][20][21].…”

Section: O N E O F T H E S E S U R G I C a L T R E A T M E N T S I S mentioning

confidence: 99%

Static Study and Finite Element Analysis of a New Method of Fixation of a Medial Humerus Fracture by an Intramedullary Nailing System Analyzed by the ANSYS Workbench 16.2 Calculus Code

Keddar¹,

Aour²,

Zahaf³

et al. 2019

Nano BioMed ENG

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Comminuted fractures of the humerus are generally treated with the intramedullary rod fixed by screws or locking plate system, and clinical results are satisfactory. We also know very well that the success of this agriculture depends on the stability and adaptability and integration of the bone tissue of the humerus with this nail in the long term, with less and optimal distribution of stress in the surrounding bone. For this reason, we began to think and look for rational solutions to reduce and minimize this stress which has become an important issue in this area. In this regard, we have proposed a new model of hollow nail made of titanium proposed by some scientific specialists in this field of biomechanics, and we inserted from the proximal humeral head, and to ensure the stability of the nail inside the bone and prevent slippage, we attached small screws. To know the extent of the realization of these nails under the influence of the forces applied to them, finite elements in three dimensions as well as the program ANSYS Workbench 16.2 were used. Two intramedullary rods were instrumented in the finite element model of a medial humeral fracture. Axial, shear, and rotational loads were applied to the models under normal and osteoporotic bone conditions. The whole simulation was repeated 5 times for each fixator. To evaluate the biomechanical characteristics, the distribution of von Mises stresses and strains, total displacement in the nail, cortical and cancellous bone were compared. The numerical results showed that the intramedullary rod system with 4 screws and 6 screws played a very important role in the absorption and thus minimization of stresses. On the other hand, the nailing system fixed with screws was too great a role in reducing the stress compared to intact model. In general, the new model nailing system secured with screws gave a lower level of von Mises stress and strain at the cortical and cancellous bone of the humerus compared to the intact model. The results provided a theoretical basis for the selection of an appropriate surgical model.

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Relationship between the shape and density distribution of the femur and its natural frequencies of vibration

Cited by 14 publications

References 65 publications

The Use of a Vibro-Acoustic Based Method to Determine the Composite Material Properties of a Replicate Clavicle Bone Model

The Use of a Vibro-Acoustic Based Method to Determine the Composite Material Properties of a Replicate Clavicle Bone Model

Vibration-based fixation assessment of tibial knee implants: A combined in vitro and in silico feasibility study

Static Study and Finite Element Analysis of a New Method of Fixation of a Medial Humerus Fracture by an Intramedullary Nailing System Analyzed by the ANSYS Workbench 16.2 Calculus Code

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