Finite Element Analysis of Insertion Angle of Absorbable Screws for the Fixation of Radial Head Fractures

Xu, Guangming; Liang, Ziyang; Li, Wei; Zhou, Yang; Chen, Zhi‐bin; Zhang, Jie

doi:10.1111/os.12797

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…Meanwhile, Pomwenger et al ( 69) simulated a keeled versus pegged glenoid implant with a force of 650N for a flexion and abduction of 90° and the primary involving muscles of the scapula are m. trapezius, m. rhomboideus, m. deltoideus, m. serratus anterior and inferior at their insertion points on the scapular surface. It is similar happened in other parts such as the radius, where Xu et al (23) utilised two absorbable screws to fix the fracture and preserve its stability, with a vertical downward force of 100N at the stress point and seven possible angles of the two screws ranging from 0o to 90o. Based on these previous researches, the boundary conditions were chosen based on patient's condition and the values of specific forces that would be used to build the finite element model.…”

Section: Boundary and Load Conditionmentioning

confidence: 82%

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A Review on Finite Element Modelling and Simulation for Upper Limb of Human Bone and Implant

Al-Tam¹,

Ramlee²,

Wahab³

et al. 2023

MJMHS

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Medical implants are normally used in clinical practice to treat most orthopaedics situations involving bone fractures, deformities, dislocation, and lengthening. It should be noted that specific measures regarding biomechanical and biomaterial characteristics are required for a successful post-surgery procedure. Biomechanical evaluations on the medical implants could be performed by utilising computer and engineering technology. One of them is in silico studies using finite element method that could be simulated in high-performance computer. However, various assumptions are required in computer simulation, such as the constraints on data input and computer resources. This review paper discusses current approaches of constructing a finite element model of human bone with specific material properties for upper limb such as the shoulder joint, humerus, elbow joint, radius and wrist joint. Previous related literatures were reviewed from selected keywords and search engines. To narrow the literature search in this study, inclusion and exclusion criteria of the literature searching were applied. We looked at the current level of knowledge in this field and offered recommendations for future study. In conclusion, studies from previous literature have demonstrated several ways for developing mathematical models and simulating medical implants.

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Section: Boundary and Load Conditionmentioning

confidence: 82%

“…Finite Element Method (FEM) has been a popular method in orthopaedics research during the previous decade (23). The model of a complicated structure and geometry such as human bone and other engineering parts may be divided into a finite number of components using the FEM.…”

Section: Overview Of the Finite Elementmentioning

confidence: 99%

A Review on Finite Element Modelling and Simulation for Upper Limb of Human Bone and Implant

Al-Tam¹,

Ramlee²,

Wahab³

et al. 2023

MJMHS

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“…Bone tissues, ligaments, and implants all have linear‐elastic material properties. Since the focus of this study is not to predict the mechanical behavior of implants, isotropic linear‐elastic material models can be used to simulate the preyield mechanical behavior 41 , 42 . Many FEA studies of the lumbar spine have assumed that the components of the spine are linear to simplify the calculations 43 , 44 , 45 .…”

Section: Discussionmentioning

confidence: 99%

Effect of the In Situ Screw Implantation Region and Angle on the Stability of Lateral Lumbar Interbody Fusion: A Finite Element Study

Zhu

Fang

et al. 2022

Orthopaedic Surgery

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Objective: To investigate the effect of the in situ screw implantation region and angle on the stability of lateral lumbar interbody fusion (LLIF) from a biomechanical perspective.Methods: A validated L2-4 finite element (FE) model was modified for simulation. The L3-4 fused segment undergoing LLIF surgery was modeled. The area between the superior and inferior edges and the anterior and posterior edges of the vertebral body (VB) is divided into four zones by three parallel lines in coronal and horizontal planes. In situ screw implantation methods with different angles based on the three parallel lines in coronal plane were applied in Models A, B, and C (A: parallel to inferior line; B: from inferior line to midline; C: from inferior line to superior line). In addition, four implantation methods with different regions based on the three parallel lines in horizontal plane were simulated as types 1-2, 1-3, 2-2, and 2-3 (1-2: from anterior line to midline; 1-3: from anterior line to posterior line; 2-2: parallel to midline; 2-3: from midline to posterior line). L3-4 ROM, interbody cage stress, screw-bone interface stress, and L4 superior endplate stress were tracked and calculated for comparisons among these models. Results:The L3-4 ROM of Models A, B, and C decreased with the extent ranging from 47.9% (flexion-extension) to 62.4% (lateral bending) with no significant differences under any loading condition. Types 2-2 and 2-3 had 45% restriction, while types 1-2 and 1-3 had 51% restriction in ROM under flexion-extension conditions. Under lateral bending, types 2-2 and 2-3 had 70.6% restriction, while types 1-2 and 1-3 had 61.2% restriction in ROM. Under axial rotation, types 2-2 and 2-3 had 65.2% restriction, while types 1-2 and 1-3 had 59.3% restriction in ROM. The stress of the cage in types 2-2 and 2-3 was approximately 20% lower than that in types 1-2 and 1-3 under all loading conditions in all models. The peak stresses at the screw-bone interface in types 2-2 and 2-3 were much lower (approximately 35%) than those in types 1-2 and 1-3 under lateral bending, while no significant differences were observed under flexion-extension and axial rotation. The peak stress on the L4 superior endplate was approximately 30 MPa and was not significantly different in all models under any loading condition.

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“…This study was approved by the ethics committee of the local institution, and written informed consent was obtained from the participants. This model was validated in our previous research (28). The surface grid editing tool in Geomagic 2013 software was used to analyze the 3D models of each part of the elbow.…”

Section: Methods 3d Elbow Joint Model Establishmentmentioning

confidence: 99%

Finite Element Analysis of Elbow Joint Stability by Different Flexion Angles of the Annular Ligament

Chen²,

Zhou

et al. 2022

Orthopaedic Surgery

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To investigate the biomechanical effects of different flexion angles of the annular ligament on elbow joint stability. Methods: Left elbow CT and MRI scans were chosen from a healthy volunteer, according to a previous research model. A cartilage and ligament model was constructed with SolidWorks software according to the MRI results to simulate the annular ligament during normal, loosen, and rupture conditions at different buckling angles (0,30, 60, 90, 120). In 15 elbow models, boundary conditions were set according to the literature. The different elbow 3D finite element models were imported into ABAQUS software to calculate and analyze the load, contact area, contact stress and stress of the medial collateral ligament of the olecranon cartilage. Results: 1. According to the analysis results, olecranon cartilage stress values when the annular ligament under different conditions(normal、loosened、ruptured)with elbow extension, were 2.1 ± 0.18, 2.4 ± 0.75, and 2.9 ± 0.94 MPa. As the buckling angle increased, the stress value decreased; with 120 degrees of elbow flexion, the minimum stress values were 0.9 ± 0.12, 1.1 ± 0.38, and 1.2 ± 0.29 MPa. 2. When the contact surface of the olecranon cartilage was flexed from 0 to 30 degrees, the olecranon cartilage contact area significantly increased, reaching a maximum value of 254±5.35 mm, and then the contact area gradually decreased, reaching a minimum value of 176±2.62 mm when the elbow joint was flexed to 120 degrees. The results when the annular ligament was loosened and ruptured were different from those of the normal annular ligament. The maximum values were 283±4.74and 312±5.49mm at 60 degrees of elbow flexion. The contact area gradually decreased with an increase in the angle, and the minimum values were 210±3.82 and 236±6.59 mm at 120 degrees of elbow flexion. 3. When the elbow joint was extended, the maximum stress of the medial collateral ligament was 6.5±0.23, 11.5±0.78 and 18.7±0.94 MPa under different states; as the stress decreased with an increase in the angle, the corresponding values were 2.8±0.18, 4.8±0.56 and 6.2±0.72 MPa at 120 degrees of elbow flexion. Conclusion:The annular ligament plays an important role in maintaining elbow joint stability. When the annular ligament ruptures, it should be reconstructed as much as possible to avoid the elevation of stress on the surface of the medial collateral ligament of the elbow and on the annular cartilage, which may cause clinical symptoms.

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Finite Element Analysis of Insertion Angle of Absorbable Screws for the Fixation of Radial Head Fractures

Cited by 7 publications

References 24 publications

A Review on Finite Element Modelling and Simulation for Upper Limb of Human Bone and Implant

A Review on Finite Element Modelling and Simulation for Upper Limb of Human Bone and Implant

Effect of the In Situ Screw Implantation Region and Angle on the Stability of Lateral Lumbar Interbody Fusion: A Finite Element Study

Finite Element Analysis of Elbow Joint Stability by Different Flexion Angles of the Annular Ligament

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