Wear estimation of trapezoidal and circular shaped hip implants along with varying taper trunnion radiuses using finite element method

Chethan, K N; Güldeniz, Oğulcan; Bhat, Shyamasunder N; Zuber, Mohammad; Shenoy, Bhaskar

doi:10.1016/j.cmpb.2020.105597

Cited by 28 publications

(15 citation statements)

References 44 publications

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“…In order to confirm that our model predictions were not significantly influenced by the mesh resolution, a mesh convergence study was performed 31 …”

Section: Methodsmentioning

confidence: 86%

“…In order to confirm that our model predictions were not significantly influenced by the mesh resolution, a mesh convergence study was performed. 31 For FE analysis, the results of the model were compared with the research data in previous studies to verify the validity. The number of comparative research data and types was closely related to the reliability of the completed FE model.…”

Section: Model Verification and Validationmentioning

confidence: 99%

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Stress Distribution of Different Pedicle Screw Insertion Techniques Following Single‐Segment TLIF: A Finite Element Analysis Study

Yang

Sun

Zhang

et al. 2023

Orthopaedic Surgery

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Objectives: At present, a variety of posterior lumbar internal fixation implantation methods have been developed, which makes it difficult for spine surgeons to choose. The stress distribution of the internal fixation system is one of the important indexes to evaluate these technologies. Common insertion technologies include Roy Camille, Magerl, Krag, AO, and Weinstein insertion techniques. This study aimed to compare the distribution of von Mises stresses in different screw fixation systems established by these insertion technologies.Methods: Here, the three-dimensional finite element (FE) method was selected to evaluate the postoperative stress distribution of internal fixation. Following different pedicle screw insertion techniques, five single-segment transforaminal lumbar interbody fusion (TLIF) models were established after modeling and validation of the L1-S1 vertebrae FE model. Results:By analyzing the data, we found that stress concentration phenomenon was in all the models. Additionally, Roy-Camille, Krag, AO, and Weinstein insertion techniques led to the great stress on lumbar vertebra, intervertebral disc, and screw-rod fixation systems. Therefore, we hope that the results can provide ideas for clinical work and development of pedicle screws in the future. It is worth noting that flexion, unaffected side lateral bending, and affected side axial rotation should be limited for the patients with cages implanted.Conclusions: Overall, our method obtained the results that Magerl insertion technique was the relatively safe approach for pedicle screw implantation due to its relatively dispersive stress in TLIF models.

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“…In order to confirm that our model predictions were not significantly influenced by the mesh resolution, a mesh convergence study was performed 31 …”

Section: Methodsmentioning

confidence: 86%

Section: Model Verification and Validationmentioning

confidence: 99%

Stress Distribution of Different Pedicle Screw Insertion Techniques Following Single‐Segment TLIF: A Finite Element Analysis Study

Yang

Sun

Zhang

et al. 2023

Orthopaedic Surgery

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“…Crash analysis is carried out according to NCAP regulations and safety standards (Van Ratingen et al, 2016) (Afripin et al, 2019). Finite element analysis is carried out using Ansys 18.0 (Chethan & Ogulcan et al, 2020) . According to NCAP regulations, the bumper is made to crash into a rigid barrier [Figure 2] (in this case, a rigid wall).…”

Section: Methodsmentioning

confidence: 99%

Conceptual design and analysis of a car bumper using finite element method

Keni

Singh

et al. 2021

Cogent Engineering

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Due to intrinsic or extrinsic conditions, the number of car accidents has increased currently across the globe. Drivers must be assured that they can avoid these problematic conditions. According to the statistics, about 10,000 are dead, and more than a million people are wounded each year in India. Hence, improvement in the safety of vehicles is of utmost importance to shoot down the number of accidents. The automotive bumper beam is one of the essential components in passenger cars. Bumper beams reduce or minimize the extent of impact caused at the front and rear ends during a collision in passenger vehicles. It absorbs the impact energy. The important physical parameters in the bumper beams such as material, size, and design to improve the extent of crashworthiness are studied and discussed in this current work. Comparative analysis between 2 mm thickness and 4 mm thickness bumper with honeycomb structure is studied. An ideal design composition is considered. This helps in advanced safety precautions.

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“…Two types of contact conditions were tested namely bonded (to simulate an extremely tight fitting of the implant with the femur), and frictional (to simulate a realistic standard fitting implant with the femur). The contacts were defined as flexible with a normal penalty stiffness factor of 1 with a penetration tolerance factor of 0.1 and based on the augmented Lagrangian method [39]. The contact surface was considered to have null initial penetration and surface offset.…”

Section: Finite Element (Fe) Modelingmentioning

confidence: 99%

Finite element analysis of a hybrid corrugated hip implant for stability and loading during gait phases

Gupta¹,

Chanda²

2022

Biomed. Phys. Eng. Express

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Implants used in total hip replacements (THR) exhibit high failure rates and up to a decade of operational life. These surgical failures could be mainly attributed to the improper positioning, post-surgical stability and loading, of the implants during different phases of the gait. Typically, revised surgeries are suggested within a few years of hip implantation, which requires multiple femoral drilling operations to remove an existing implant, and to install a new implant. The pain and trauma associated with such procedures are also challenging with the existing hip implants. In this work, we designed a novel corrugated hip implant with innovative dimensioning as per ASTM standards, and grooves for directed insertion and removal (using a single femoral drilling and positioning operation). Biocompatible titanium alloy (Ti6Al4V) was chosen as the implant material, and the novel implant was placed into a femur model through a virtual surgery to study its stability and loading during a dynamic gait cycle. A detailed mesh convergence study was conducted to select a computationally accurate finite element (FE) mesh. Tight fit and frictional fit attachment conditions were simulated, and the gait induced displacements and stresses on the implant, cortical and cancellous bone sections were characterized. During walking, the implant encountered the maximum von-Mises stress of 254.97 MPa at the femoral head. The analyses indicated low micro-motions (i.e., approximately 7 µm) between the femur and implant, low stresses at the implant and bone within elastic limits, and uniform stress distribution, which unlike existing hip implants, would be indispensable for bone growth and implant stability enhancement, and also for reducing implant wear.

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Wear estimation of trapezoidal and circular shaped hip implants along with varying taper trunnion radiuses using finite element method

Cited by 28 publications

References 44 publications

Stress Distribution of Different Pedicle Screw Insertion Techniques Following Single‐Segment TLIF: A Finite Element Analysis Study

Stress Distribution of Different Pedicle Screw Insertion Techniques Following Single‐Segment TLIF: A Finite Element Analysis Study

Conceptual design and analysis of a car bumper using finite element method

Finite element analysis of a hybrid corrugated hip implant for stability and loading during gait phases

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