Influence of the fixation region of a press–fit hip endoprosthesis on the stress–strain state of the “bone–implant” system

Levadnyi, Ievgen; Awrejcewicz, Jan; Goethel, Márcio Fagundes; Loskutov, Oleg

doi:10.1016/j.compbiomed.2017.03.030

Cited by 21 publications

(7 citation statements)

References 46 publications

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“…Simultaneously, the peak value of 458.36 MPa of all helical blade models was also generated in the same model, as shown in Figures 4-6. However, none of these peak values exceeded the yielding stress of 750-900 MPa for the implants of titanium material (Sitthiseripratip et al, 2003;Levadnyi et al, 2017).…”

Section: The Von Mises Stress Of the Implant Modelsmentioning

confidence: 80%

Relative instability ratios of bone wall defects in trochanteric hip fractures: A finite element analysis

Yang

Mao

Chang

et al. 2023

Front. Bioeng. Biotechnol.

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Background: For decades, medial and lateral wall fragments of trochanteric hip fractures were considered two pivotal factors that could influence the stability of postoperative femur-implant complex. However, most studies seemed to misunderstand the concept of the posteromedial fragment and equated it with the medial wall, which overlooked vital roles of the anteromedial wall. Roles of the posterior coronal bone fragment were also highlighted in some research. However, influences of the bone walls above the trochanteric fracture instability are yet to be investigated and quantified by means of finite element analysis.Methods: Eight trochanteric fracture fixation models with different wall defects were constructed. Outcome indicators were the von Mises stress of the implant models, the maximum/minimum principal strain, the risky tensile/compressive volume and the volume ratios of the bone models, the femoral head vertex displacement, and the fracture surface gap. Based on these indicator values, the relative instability ratios were computed.Results: Outcome indicators, absolute values, and nephograms of all models showed the same upward and concentrating trends with exerted hip contact loads shifting from static walking to dynamic climbing. Similarly, these indicators also exhibited the same trends when the eight models were solved in sequence. Moreover, the relative instability ratio of the medial wall (100%), particularly the anteromedial part (78.7%), was higher than the figure for the lateral wall (36.6%).Conclusion: The anteromedial wall played relatively pivotal stabilizing roles in trochanteric hip fractures compared with the posteromedial wall and the lateral wall, which indicated that orthopedic surgeons should attach more importance to the anteromedial cortex support in an operating theatre.

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Section: The Von Mises Stress Of the Implant Modelsmentioning

confidence: 80%

Relative instability ratios of bone wall defects in trochanteric hip fractures: A finite element analysis

Yang

Mao

Chang

et al. 2023

Front. Bioeng. Biotechnol.

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“…As the implant material significantly affects the transmission of stress from the implant to the surrounding bone, it is essential to evaluate the bone remodelling rate and related failure index characteristics for hip implants made from various materials. The predominant bone remodelling estimating model, 48,[90][91][92][93] proposed by Winan et al 94 and Huiskes et al, 95 is based on the strain energy density (SED), which is widely used (J cm À3 ). The bone remodelling rate Dr Dt can be estimated using the following eqn (21).…”

Section: Porous and Lattice Structurementioning

confidence: 99%

Advancement in total hip implant: a comprehensive review of mechanics and performance parameters across diverse novelties

Soliman,

Islam,

Chowdhury

et al. 2023

J. Mater. Chem. B

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“…The dependence between F x , F y , and F z (expressed in percentage of the body weight) during a normal gait cycle is shown in Fig. 3b (Bergmann et al, 2001; Bergmann, 2008; Levadnyi et al, 2017). According to the plot, the maximum values of the components F x , F y , and F z are equal to: F x = 0.743Q, F y = 0.254Q, F z = 2.649Q, respectively, where Q is the weight of a human body (for body mass assumed to be 70 kg and the acceleration of gravity 9.81 m/s 2 ).…”

Section: Methodsmentioning

confidence: 99%

On the choice of the thickness of the cement mantle in cemented hip arthroplasty

Levadnyi

Awrejcewicz

Loskutov

et al. 2017

jtam

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Recommendations for the optimal thickness of the cement mantle in cemented hip arthroplasty are outlined based on the results obtained with the finite element method. The investigations show that distal femur cement thickness higher than 2 mm positively affects mechanical behaviour of the cement mantle and can be useful in reducing stress-strain levels in the distal part of the femur what leads to prevention of development of a stress-shielding effect. The results of the study can contribute to the success of long-term implants.

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Influence of the fixation region of a press–fit hip endoprosthesis on the stress–strain state of the “bone–implant” system

Cited by 21 publications

References 46 publications

Relative instability ratios of bone wall defects in trochanteric hip fractures: A finite element analysis

Relative instability ratios of bone wall defects in trochanteric hip fractures: A finite element analysis

Advancement in total hip implant: a comprehensive review of mechanics and performance parameters across diverse novelties

On the choice of the thickness of the cement mantle in cemented hip arthroplasty

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