Preclinical Strength Checking for Artificial Pelvic Prosthesis under Multi-activities - A Case Study

Dong, Enchun; Iqbal, Taimoor; Fu, Jun; Li, Dichen; Liu, Bin; Guo, Zheng; Cuadrado, Alberto; Zhen, Zhen; Hu, Fan

doi:10.1007/s42235-019-0121-5

Cited by 10 publications

(6 citation statements)

References 36 publications

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“…The stress values obtained in the "bone-endoprosthesis" system during the walking simulation are slightly higher than the stress values reported previously [28], where a similar approach was used. The reported peak stresses in the implant were approximately 105 MPa during the walking phase, and the stresses in the screws and pelvic bones were approximately 50 MPa under the same loading condition.…”

Section: Discussioncontrasting

confidence: 63%

“…The reported peak stresses in the implant were approximately 105 MPa during the walking phase, and the stresses in the screws and pelvic bones were approximately 50 MPa under the same loading condition. Therefore, the authors [28] expected that the fatigue limit could be reached only in the case of more severe loading scenarios, such as stair climbing. The difference in the results can be explained by the difference in the implant design and the differences in the approaches of finite element modelling of the behaviour of the bone tissue.…”

Section: Discussionmentioning

confidence: 99%

“…Kinematic boundary conditions for the model and contact regions were applied and approved by the medical studies described in other articles [11,26,27]. The loading scheme, which was used in current research and based on the loading of the structure with the hip joint force acting as a reaction force, was the same as used previously [28]. It allowed us to describe the stress-strain state in a more accurate way.…”

Section: Model Validationmentioning

confidence: 99%

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Finite Element Analysis of Customized Acetabular Implant and Bone after Pelvic Tumour Resection throughout the Gait Cycle

et al. 2021

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The aim of this paper is to investigate and compare the stress distribution of a reconstructed pelvis under different screw forces in a typical walking pattern. Computer-aided design models of the pelvic bones and sacrum made based on computer tomography images and individually designed implants are the basis for creating finite element models, which are imported into ABAQUS software. The screws provide compression loading and bring the implant and pelvic bones together. The sacrum is fixed at the level of the L5 vertebrae. The variants of strength analyses are carried out with four different screw pretension forces. The loads equivalent to the hip joint reaction forces arising during moderate walking are applied to reference points based on the centres of the acetabulum. According to the results of the performed analyses, the optimal and critical values of screw forces are estimated for the current model. The highest stresses among all the models occurred in the screws and implant. As soon as the screw force increases up to the ultimate value, the bone tissue might be locally destroyed. The results prove that the developed implant design with optimal screw pretension forces should have good biomechanical characteristics.

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Section: Discussioncontrasting

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

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Finite Element Analysis of Customized Acetabular Implant and Bone after Pelvic Tumour Resection throughout the Gait Cycle

et al. 2021

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“…It has been widely used to solve clinical problems and has gained full acceptance. It has been applied to the study of the mechanism of damage to the human pelvis during underbody blast attacks on military vehicles [ 16 ], the effect of the structure of the area between the anus and vagina on giving birth [ 17 ], the effects of different surgical fixation strategies [ 18 ], sitting positions on patient rehabilitation during pelvic fractures [ 19 ], and the simulated stresses after implantation of different artificial prostheses in the pelvis [ 20 , 21 , 22 , 23 , 24 ]. However, the biomechanical pelvic modeling methods used in these studies cannot be used in practice because they often ignore certain muscles or ligaments, which play a significant role in the production of reduction force [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Method of Biomechanics Modeling for Pelvic Bone and Surrounding Soft Tissues

Kou,

Liang,

Wang

et al. 2023

Bioengineering

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The pelvis and its surrounding soft tissues create a complicated mechanical environment that greatly affects the success of fixing broken pelvic bones with surgical navigation systems and/or surgical robots. However, the modeling of the pelvic structure with the more complex surrounding soft tissues has not been considered in the current literature. The study developed an integrated finite element model of the pelvis, which includes bone and surrounding soft tissues, and verified it through experiments. Results from the experiments showed that including soft tissue in the model reduced stress and strain on the pelvis compared to when it was not included. The stress and strain distribution during pelvic loading was similar to what is typically seen in research studies and more accurate in modeling the pelvis. Additionally, the correlation with the experimental results from the predecessor’s study was strong (R2 = 0.9627). The results suggest that the integrated model established in this study, which includes surrounding soft tissues, can enhance the comprehension of the complex biomechanics of the pelvis and potentially advance clinical interventions and treatments for pelvic injuries.

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“…Additive-manufactured (AM) orthopaedic implants with porous structures have received extensive attention in recent years because they not only weaken the stress shielding by reducing the equivalent elastic modulus of the implants [1,2] but promote long-term osseointegration through bone ingrowth in the porous structure [3,4]; thus, it appears as a promising solution to solve the long-term aseptic loosening of the metal orthopaedic implant. Metal AM technologies, mainly achieved by powder bed fusion (PBF), have become the main technique for manufacturing porous implants [5][6][7] and have been used in clinical research, such as in dental implants [8], artificial vertebral bodies [9], pelvic reconstruction [10], and acetabular cups [11], some of which have been commercialized.…”

Section: Introductionmentioning

confidence: 99%

The Promotion of Mechanical Properties by Bone Ingrowth in Additive-Manufactured Titanium Scaffolds

Sun

Dong

Chen

et al. 2022

JFB

Self Cite

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Although the initial mechanical properties of additive-manufactured (AM) metal scaffolds have been thoroughly studied and have become a cornerstone in the design of porous orthopaedic implants, the potential promotion of the mechanical properties of the scaffolds by bone ingrowth has barely been studied. In this study, the promotion of bone ingrowth on the mechanical properties of AM titanium alloy scaffolds was investigated through in vivo experiments and numerical simulation. On one hand, the osseointegration characteristics of scaffolds with architectures of body-centred cubic (BCC) and diamond were compared through animal experiments in which the mechanical properties of both scaffolds were not enhanced by the four-week implantation. On the other hand, the influences of the type and morphology of bone tissue in the BCC scaffolds on its mechanical properties were investigated by the finite element model of osseointegrated scaffolds, which was calibrated by the results of biomechanical testing. Significant promotion of the mechanical properties of AM metal scaffolds was only found when cortical bone filled the pores in the scaffolds. This paper provides a numerical prediction method to investigate the effect of bone ingrowth on the mechanical properties of AM porous implants, which might be valuable for the design of porous implants.

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Preclinical Strength Checking for Artificial Pelvic Prosthesis under Multi-activities - A Case Study

Cited by 10 publications

References 36 publications

Finite Element Analysis of Customized Acetabular Implant and Bone after Pelvic Tumour Resection throughout the Gait Cycle

Finite Element Analysis of Customized Acetabular Implant and Bone after Pelvic Tumour Resection throughout the Gait Cycle

An Integrated Method of Biomechanics Modeling for Pelvic Bone and Surrounding Soft Tissues

The Promotion of Mechanical Properties by Bone Ingrowth in Additive-Manufactured Titanium Scaffolds

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