Development of a crushable foam model for human trabecular bone

Soltanihafshejani, Navid; Bitter, Thom; Janssen, Dennis

doi:10.1016/j.medengphy.2021.08.009

Cited by 12 publications

(27 citation statements)

References 32 publications

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“…Combined with the above results, this realization reminded us of the compressible space in the cancellous bone of patients with late-stage AS-related kyphosis. Additionally, previous biomechanical studies showed that the yield strength of cancellous bone decreased significantly in the stress–strain curve, and the stress conduction of trabecular bone in cancellous bone was attenuated and poorly conductive ( 31 , 32 ). This finding suggests that vertebral body osteotomy by compressing the cancellous bone can avoid rupturing the surrounding structure due to poor compression.…”

Section: Discussionmentioning

confidence: 90%

Application of vertebral body compression osteotomy in pedicle subtraction osteotomy on ankylosing spondylitis kyphosis: Finite element analysis and retrospective study

et al. 2023

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BackgroundAnkylosing spondylitis (AS) is a chronic inflammatory rheumatic disease, with pathological characteristics of bone erosion, inflammation of attachment point, and bone ankylosis. Due to the ossified intervertebral disc and ligament, pedicle subtraction osteotomy (PSO) is one of the mainstream surgeries of AS-related thoracolumbar kyphosis, but the large amount of blood loss and high risk of instrumental instability limit its clinical application. The purpose of our study is to propose a new transpedicular vertebral body compression osteotomy (VBCO) in PSO to reduce blood loss and improve stability.MethodsA retrospective analysis was performed on patients with AS-related thoracolumbar kyphosis who underwent one-level PSO in our hospital from February 2009 to May 2019. A total of 31 patients were included in this study; 6 received VBCO and 25 received eggshell vertebral body osteotomy. We collected demographic data containing gender and age at diagnosis. Surgical data contained operation time, estimated blood loss (EBL), and complications. Radiographic data contained pre-operative and follow-up sagittal parameters including chin brow-vertical angle (CBVA), global kyphosis (GK), thoracic kyphosis (TK), and lumbar lordosis (LL). A typical case with L2-PSO was used to establish a finite element model. The mechanical characteristics of the internal fixation device, vertebral body, and osteotomy plane of the two osteotomy models were analyzed under different working conditions.ResultsThe VBCO could provide comparable restoring of CBVA, GK, TK, and LL in the eggshell osteotomy procedure (all p > 0.05). The VBCO significantly reduced EBL compared to those with eggshell osteotomy [800.0 ml (500.0–1,439.5 ml) vs. 1,455.5 ml (1,410.5–1,497.8 ml), p = 0.033]. Compared with the eggshell osteotomy, VBCO showed better mechanical property. For the intra-pedicular screw fixation, the VBCO group had a more average distributed and lower stress condition on both nails and connecting rod. VBCO had a flattened osteotomy plane than the pitted osteotomy plane of the eggshell group, showing a lower and more average distributed maximum stress and displacement of osteotomy plane.ConclusionIn our study, we introduced VBCO as an improved method in PSO, with advantages in reducing blood loss and providing greater stability. Further investigation should focus on clinical research and biomechanical analysis for the application of VBCO.

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Section: Discussionmentioning

confidence: 90%

Application of vertebral body compression osteotomy in pedicle subtraction osteotomy on ankylosing spondylitis kyphosis: Finite element analysis and retrospective study

et al. 2023

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“…The current simulations used an ICF model to capture the post‐yield behavior of the tibiae 17 . As the ICF model incorporates an updating yield criterion, to avoid overestimation of the bone strength, a repetitive loading configuration was applied to model damage accumulation in the bone as a preconditioning treatment 32,33 .…”

Section: Discussionmentioning

confidence: 99%

“…First, the FEA models were not validated against experimental results. The material model used in our study, however, was previously validated against experimental findings of human trabecular bone 17 and now extended with the cortical bone data adapted from Kaneko et al 25 Second, the change in BMD applied to the models was not related to the implant used in the current study but was based on clinical data of 86 patients implanted with four different prostheses. Hence, BMD changes could be different for this particular implant and tibiae used in the current study.…”

Section: Discussionmentioning

confidence: 99%

“…For element sizes smaller than 3 mm, the difference in strain energy was less than 10% 26 which was selected as the target size. Numerical simulations were performed using a nonlinear elastoplastic ICF model (Table 1; detailed information about this ICF model can be found in study by Soltanihafshejani et al 17 …”

Section: Methodsmentioning

confidence: 99%

“…Computational modeling using finite element analysis (FEA) can assist in assessing the failure risk of the reconstruction 17 . In designing and evaluating orthopedic implants, it is crucial to take into account the potential for plastic deformation of cancellous bone, which can result in implant migration and loosening.…”

Section: Introductionmentioning

confidence: 99%

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The effect of periprosthetic bone loss on the failure risk of tibial total knee arthroplasty

Soltanihafshejani

Bitter

Janssen

2023

Journal Orthopaedic Research

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The effect of long‐term periprosthetic bone loss on the process of aseptic loosening of tibial total knee arthroplasty (TKA) is subject to debate. Contradicting studies can be found in literature, reporting either bone resorption or bone formation before failure of the tibial tray. The aim of the current study was to investigate the effects of bone resorption on failure of tibial TKA, by simulating clinical postoperative bone density changes in finite element analysis (FEA) models and FEA models were created of two tibiae representing cases with good and poor initial bone quality which were subjected to a walking configuration and subsequently to a traumatic stumbling load. Bone failure was simulated using a crushable foam model incorporating progressive yielding. Repetitive loading under a level walking load did not result in failure of the periprosthetic bone in neither the good nor poor bone quality tibia at the baseline bone densities. When applying a stumble load, a collapse of the tibial reconstruction was noticed in the poor bone quality model. Incorporating postoperative bone loss led to a significant increase of the failure risk, particularly for the poor bone quality model in which subsidence of the tibial component was substantial. Our results suggest bone loss can lead to an increased risk of a collapse of the tibial component, particularly in case of poor bone quality at the time of surgery. The study also examined the probability of medial or lateral subsidence of the implant and aimed to improve clinical implications. The FEA model simulated plastic deformation of the bone and implant subsidence, with further validation required via mechanical experiments.

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Exploring the enhanced energy-absorption performance of hybrid polyurethane(PU)-foam-filled lattice metamaterials

Li,

Hou,

Huang

et al. 2024

International Journal of Impact Engineering

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Development of a crushable foam model for human trabecular bone

Cited by 12 publications

References 32 publications

Application of vertebral body compression osteotomy in pedicle subtraction osteotomy on ankylosing spondylitis kyphosis: Finite element analysis and retrospective study

Application of vertebral body compression osteotomy in pedicle subtraction osteotomy on ankylosing spondylitis kyphosis: Finite element analysis and retrospective study

The effect of periprosthetic bone loss on the failure risk of tibial total knee arthroplasty

Exploring the enhanced energy-absorption performance of hybrid polyurethane(PU)-foam-filled lattice metamaterials

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