Establishing the 3-D finite element solid model of femurs in partial by volume rendering

Zhang, Yinwang; Zhong, Wuxue; Zhu, Haibo; Chen, Yun; Xu, Li; Zhu, Jie

doi:10.1016/j.ijsu.2013.06.843

Cited by 15 publications

(4 citation statements)

References 12 publications

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“…The initial cylindrical volume has a Young's modulus of 1 MPa. Poisson's ratio is 0.3 for all modeled materials (Wang et al, ; Zhang et al, ). The model is meshed by 674,431 eight node tetrahedral solid elements (SOLID185) assuming an element size of 0.6 mm.…”

Section: Methodsmentioning

confidence: 99%

Biomechanical Study of the Development of Long Bones: Finite Element Structure Synthesis of the Human Second Proximal Phalanx Under Growth Conditions

Lipphaus

Witzel

2018

The Anatomical Record

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Torsional loads are a possible mechanical explanation for the architecture of long bone. Finite element structure synthesis (FESS) has previously successfully been used as a deductive technique using Wolff´s Law by applying expected loads to an unspecific homogeneous solid and eliminating stress free parts to verify muscle forces. The extended approach presented in this article includes further mechanobiological rules to model the development from a cartilage model to a finger bone. In contrast to former computational models, simulation of processes leading to both external growth and internal differentiation are included. Combined axial and torsional loads synthesize a complete human secondary proximal phalanx model comparable to form and internal structure to that observed in vivo. While the computational model is very sensitive to initial alterations of loads, changes after growth have a minor effect as observed in animal models. Predictions of cartilage growth and ossification during FESS showed significant similarities to ontogeny indicating the importance of mechanical factors for the morphogenesis of bone during growth. Anat Rec, 302:1389Rec, 302: -1398Rec, 302: , 2019

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Section: Methodsmentioning

confidence: 99%

Biomechanical Study of the Development of Long Bones: Finite Element Structure Synthesis of the Human Second Proximal Phalanx Under Growth Conditions

Lipphaus

Witzel

2018

The Anatomical Record

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“…The three types of bone trabeculae increase the rigidity of the passing area by 160 to 400%. Zhang Y found that the compression forces were mainly concentrated on the medial surface of the femur by a finite element analysis [10]. The anterior wall of the femur at the calcar's level is strong and thick but the posterior wall is otherwise.…”

Section: Main Textmentioning

confidence: 99%

Strategies for managing the destruction of calcar femorale

Jin

Pang

Jiang

2021

BMC Musculoskelet Disord

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Background The calcar femorale was identified long ago. However, our current understanding of the calcar is insufficient, and its related concepts are sometimes confused. The calcar femoral is an important anatomical structure of the proximal femur, and its function can be overlooked. In trauma, tumors, or other diseases, the calcar femorale can be destroyed or changed pathologically. As a result, the mechanical structure of the proximal femur becomes destroyed, causing pathological fractures. How to address the destruction of the calcar femorale or the damage to the calcar femorale is discussed in this article. Main text Destruction of the calcar femorale is accompanied by many conditions, including trauma, tumors, and other diseases. The types of hip fractures caused by trauma include femoral neck fractures and intertrochanteric fractures. Dynamic hip screws, proximal femoral nail anti-rotation, and multiple parallel cannulate pins can be used in different conditions. When metastatic and primary bone tumors involve the calcar femorale, endoprostheses are widely used. Other diseases, such as fibrous dysplasia and aneurysmal bone cyst are treated differently. Conclusions The calcar femorale can redistribute stresses and the destruction of the calcar femorale can lead to an increase in posterior medial stress. Many factors need to be considered when deciding whether to reconstruct the calcar femorale. Effective treatment strategies for managing the destruction of calcar femorale will need first establishing the precise mechanism of the destruction of the calcar and then designing therapies towards these mechanisms. Further investigation to the calcar needs to be carried out.

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“…CT imaging enables the creation of complex models that can be subsequently used for finite element analysis simulations. 7 , 34 , 35 …”

Section: Introductionmentioning

confidence: 99%

“…CT imaging enables the creation of complex models that can be subsequently used for finite element analysis simulations. 7,34,35 It is well known that the femoral neck is a site of complex loading, shared between cortical and trabecular compartments, and pre-existing osteoporosis further increases the risk of a femoral neck fracture after falls. Within the proximal femur, the trabecular system provides a specific distribution that allows it to support the body's weight.…”

Section: Introductionmentioning

confidence: 99%

Mapping the Spatial Evolution of Proximal Femur Osteoporosis: A Retrospective Cross-Sectional Study Based on CT Scans

Bot,

Chirla,

Hozan

et al. 2024

IJGM

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Purpose The purpose of this study was to quantify the modifications occurring in osteoporosis at the level of the human proximal femur throughout the trabecular structure, along with the identification of certain anatomic regions preferentially affected by osteoporosis. Another goal was to map the evolution of the radiodensity of the trabecular bone as osteoporosis progresses to an advanced stage. Methods The study included CT scans (right femur) from 51 patients, out of which 40 had various degrees of osteoporosis, but no other local pathology. Ten regions of interest in two orthogonal slices have been identified and the differences in radiodensity as well as their evolution have been statistically analyzed in terms of relative and absolute changes. Results A detailed spatial map showing the evolution of osteoporosis was obtained. As osteoporosis evolved, the relative decrease in radiodensity was inversely correlated to the radiodensity of the healthy bone. In particular, the region covering the Ward triangle decreased the most, by an average 61–62% in osteopenia and 101–106% in advanced osteoporosis, while the principal compressive group was affected the least, showing a decrease by an average 14–15% in osteopenia and 29–32% in advanced osteoporosis. The absolute decrease in radiodensity was not correlated to the radiodensity of the healthy bone and was shifted to the inferior-posterior edge of the femur. Inside the femoral head, the upper region was affected the most in absolute terms, while the greater trochanter was less affected than the femoral neck. The maximum metaphyseal cortical bone density was unaffected by the progression of osteoporosis. Conclusion Significant differences were noticed in terms of the absolute and relative osteoporotic changes in radiodensity related to different anatomical regions of the human femoral bone. These differences become more pronounced as the disease progresses.

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Establishing the 3-D finite element solid model of femurs in partial by volume rendering

Abstract: Compared with whole modeling by volume rendering method, the 3-D finite element solid model created in partial is more real and fit for finite element analysis.

Cited by 15 publications

References 12 publications

Biomechanical Study of the Development of Long Bones: Finite Element Structure Synthesis of the Human Second Proximal Phalanx Under Growth Conditions

Biomechanical Study of the Development of Long Bones: Finite Element Structure Synthesis of the Human Second Proximal Phalanx Under Growth Conditions

Strategies for managing the destruction of calcar femorale

Mapping the Spatial Evolution of Proximal Femur Osteoporosis: A Retrospective Cross-Sectional Study Based on CT Scans

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