Biomechanical analysis for five fixation techniques of Pauwels-III fracture by finite element modeling

Peng, Matthew Jian-Qiao; Xu, Hongyan; Chen, Haiyan; Lin, Ze; Li, XinXu; Shen, ChuLong; Lau, YongQiang; He, Erxing; Guo, Yunfei

doi:10.1016/j.cmpb.2020.105491

Cited by 14 publications

(8 citation statements)

References 23 publications

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“…Finite element analysis is a computer simulation method, which has been widely used to study implants for unstable femoral neck fractures ( Peng et al, 2020 ; Zeng et al, 2020 ; Wang et al, 2022 ). It could evaluate the biomechanical properties of different implants by testing the stress and displacement data.…”

Section: Discussionmentioning

confidence: 99%

Biomechanical evaluation of two modified intramedullary fixation system for treating unstable femoral neck fractures: A finite element analysis

Huang

Zhang

Bai

et al. 2023

Front. Bioeng. Biotechnol.

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Purpose: The existing implants for fixation of femoral neck fractures have poor biomechanical stability, so the failure rate is high. We designed two modified intramedullary implants for treating unstable femoral neck fractures (UFNFs). We tried to improve the biomechanical stability of fixation by shortening the moment and reducing stress concentration. Each modified intramedullary implant was compared with cannulated screws (CSs) through finite element analysis (FEA).Methods: Five different models were included: three cannulated screws (CSs, Model 1) in an inverted triangle configuration, the dynamic hip screw with an anti-rotation screw (DHS + AS, Model 2), the femoral neck system (FNS, Model 3), the modified intramedullary femoral neck system (IFNS, Model 4), and the modified intramedullary interlocking system (IIS, Model 5). Three-dimensional (3D) models of femur and implants were constructed by using 3D modelling software. Three load cases were simulated to assess the maximal displacement of models and fracture surface. The maximal stress at the bone and implants was also evaluated.Results: FEA data showed that Model 5 had the best performance in terms of maximum displacement while Model 1 had the worst performance for this index under axial load of 2100 N. With respect to Maximum stress, Model 4 had the best performance while Model 2 had the worst performance under axial load. The general trends under bending and torsion load were consistent with that under axial load. Our data demonstrated that the two modified intramedullary implants exhibited the best biomechanical stability, followed by FNS and DHS + AS, and then three cannulated screws in axial, bending, and torsion load cases.Conclusion: The two modified intramedullary designs showed the best biomechanical performance among the five implants included in this study. Therefore, this might provide some new options for trauma surgeons to deal with unstable femoral neck fractures.

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Section: Discussionmentioning

confidence: 99%

Biomechanical evaluation of two modified intramedullary fixation system for treating unstable femoral neck fractures: A finite element analysis

Huang

Zhang

Bai

et al. 2023

Front. Bioeng. Biotechnol.

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“…The calcar, which extends from the posteromedial cortex in the femoral neck to the distal part of the lesser trochanter, is identified with a high bone density in the final topologies. This is an important fact since this region helps to support stems from implants, which need a dense cancellous bone for a proper anchorage; for this reason, numerous fixation methods have been proposed on this zone, see (Cha et al 2019) and (Peng et al 2020).…”

Section: Discussionmentioning

confidence: 99%

A simple and effective 1D-element discrete-based method for computational bone remodeling

Quexada-Rodríguez

Márquez-Flórez

Cerrolaza

et al. 2021

Computer Methods in Biomechanics and Biomedical Engineering

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In-silico models applied to bone remodeling are widely used to investigate bone mechanics, bone diseases, bone-implant interactions, and also the effect of treatments of bone pathologies. This paper proposes a new methodology to solve the bone remodeling problem using one-dimensional (1D) elements to discretize trabecular structures more efficiently for 2D and 3D domains. An Euler integration scheme is coupled with the momentum equations to obtain the evolution of material density at each step. For the simulations, the equations were solved by using the finite element method, and two benchmark tests were solved varying mesh parameters. Proximal femur and calcaneus bone were selected as study cases given the vast research available on the topology of these bones, and compared with the anatomical features of trabecular bone reported in the literature. The presented methodology has proven to be efficient in optimizing topologies of lattice structures; It can predict the trend of formation patterns of the main trabecular groups from two different cancellous bones (femur and calcaneus) using domains set up by discrete elements as a starting point. Preliminary results confirm that the proposed approach is suitable and useful in bone remodeling problems leading to a considerable computational cost reduction. Characteristics similar to those encountered in topological optimization (TO) algorithms were identified in the benchmark tests as well, showing the viability of the proposed approach in other applications such as bio-inspired design.

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“…Compared with the data from cameras and laser measurements, which are traditionally used in plant observation (Jacques et al 2013;Rojas-Pierce et al 2007;Sang et al 2014), MRI images acquire 3D information inside tissues without blind spots. In addition, we can access the MRI output in the medical image format (DICOM format) to obtain 3D information and easily build a 3D simulation model by interfacing with software, such as the finite element model building software (Peng et al 2020). Although there is a similar micro CT device that can image the interior of small subjects in three dimensions, the MRI device is superior since the subjects are not exposed to radiation and the device has a large experimental space (Boerckel et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Development of a dynamic imaging method for gravitropism in pea sprouts using clinical magnetic resonance imaging system

Nakai

Azuma

Nakaso

et al. 2020

Plant Biotechnology

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Although magnetic resonance imaging (MRI) is a useful technique, only a few studies have investigated the dynamic behavior of small subjects using MRI owing to constraints such as experimental space and signal amount. In this study, to acquire high-resolution continuous three-dimensional gravitropism data of pea (Pisum sativum) sprouts, we developed a small-bore MRI signal receiver coil that can be used in a clinical MRI and adjusted the imaging sequence. It was expected that such an arrangement would improve signal sensitivity and improve the signal-to-noise ratio (SNR) of the acquired image. All MRI experiments were performed using a 3.0-T clinical MRI scanner. An SNR comparison using an agarose gel phantom to confirm the improved performance of the small-bore receiver coil and an imaging experiment of pea sprouts exhibiting gravitropism were performed. The SNRs of the images acquired with a standard 32-channel head coil and the new small-bore receiver coil were 5.23±0.90 and 57.75±12.53, respectively. The SNR of the images recorded using the new coil was approximately 11-fold higher than that of the standard coil. In addition, when the accuracy of MR imaging that captures the movement of pea sprout was verified, the difference in position information from the optical image was found to be small and could be used for measurements. These results of this study enable the application of a clinical MRI system for dynamic plant MRI. We believe that this study is a significant first step in the development of plant MRI technique.

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Biomechanical analysis for five fixation techniques of Pauwels-III fracture by finite element modeling

Cited by 14 publications

References 23 publications

Biomechanical evaluation of two modified intramedullary fixation system for treating unstable femoral neck fractures: A finite element analysis

Biomechanical evaluation of two modified intramedullary fixation system for treating unstable femoral neck fractures: A finite element analysis

A simple and effective 1D-element discrete-based method for computational bone remodeling

Development of a dynamic imaging method for gravitropism in pea sprouts using clinical magnetic resonance imaging system

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