Wear estimation at the contact surfaces of oval shaped hip implants using finite element analysis

Shaikh, Numa; Shenoy, Bhaskar; Bhat, Shyamasunder N; Shetty, Sawan; Chethan, K N

doi:10.1080/23311916.2023.2222985

Cited by 17 publications

(6 citation statements)

References 41 publications

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“…They can be either measured with help of instrumented hip implants or be calculated with gait analysis. In different studies, the resulting force on the femoral head could be determined for important activities like walking, running, and stumbling [2,[6][7][8][9]. Peak forces were multiple times higher than the gravitational force of the body weight (BW) and valued about 280%-480% BW during walking, during running up to 615% BW and during stumbling up to 870% BW [10,11].…”

Section: Introductionmentioning

confidence: 99%

Patient-specific finite element analysis for assessing hip fracture risk in aging populations

K N,

Schmidt Genannt Waldschmidt,

Corda

et al. 2024

Biomed. Phys. Eng. Express

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The femur is one of the most important bones in the human body, as it supports the body's weight and helps with movement. The aging global population presents a significant challenge, leading to an increasing demand for artificial joints, particularly in knee and hip replacements, which are among the most prevalent surgical procedures worldwide. This study focuses on hip fractures, a common consequence of osteoporotic fractures in the elderly population. To accurately predict individual bone properties and assess fracture risk, patient-specific finite element models (FEM) were developed using CT data from healthy male individuals. The study employed ANSYS software to estimate fracture loads under simulated single stance loading conditions, considering strain-based failure criteria.The FEM bone models underwent meticulous reconstruction, incorporating geometrical and mechanical properties crucial for fracture risk assessment. Results revealed an underestimation of the ultimate bearing capacity of bones, indicating potential fractures even during routine activities. The study explored variations in bone density, failure loads, and density/load ratios among different specimens, emphasizing the complexity of bone strength determination.Discussion of findings highlighted discrepancies between simulation results and previous studies, suggesting the need for optimization in modeling approaches. The strain-based yield criterion proved accurate in predicting fracture initiation but required adjustments for better load predictions. The study underscores the importance of refining density-elasticity relationships, investigating boundary conditions, and optimizing models through in vitro testing for enhanced clinical applicability in assessing hip fracture risk.In conclusion, this research contributes valuable insights into developing patient-specific FEM bone models for clinical hip fracture risk assessment, emphasizing the need for further refinement and optimization for accurate predictions and enhanced clinical utility.

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Section: Introductionmentioning

confidence: 99%

Patient-specific finite element analysis for assessing hip fracture risk in aging populations

K N,

Schmidt Genannt Waldschmidt,

Corda

et al. 2024

Biomed. Phys. Eng. Express

Self Cite

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“…The finite element method is a valuable tool in medical implant and human organ research, providing a detailed and quantitative understanding of the mechanical behavior of implants in the oral environment [15][16][17][18]. This study utilized finite element analysis to investigate the varying abutment angles, ranging from 0 • to 25 • , impact stress distribution within the peri-implant bone.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Angled Abutments: Three-Dimensional Finite Element Stress Analysis of Anterior Maxillary Implants

K N,

Eram,

Shetty

et al. 2024

Prosthesis

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Restorative dentistry is the repairing of damaged teeth and restoring oral health and function. Dental implants are typically placed within the cortical bone of the jaw to provide stability and support for prosthetic restorations. The successful restoration of complex anatomical features of the maxillary anterior is difficult for prosthodontists. Using a 3D slicer, CT scan images were used to create a detailed three-dimensional model of the maxilla bone. This study utilizes ANSYS Workbench, a finite element software program, to analyze the abutment angles, ranging from 0° to 25°, and the impact stress distribution within peri-implant bone. The outcomes of our studies align with and substantiate certain evidence in the literature documenting bone resorption, specifically at the level of the implant neck and near the cortical bone. The study aims to provide a comprehensive understanding of angled abutment stress patterns in the bone surrounding dental implants, offering valuable insights for clinical applications in critical areas of the mouth.

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“…Finite element analysis is a numerical stress analysis technique that has proven to be a useful tool in investigating the effect of the biomechanical properties of prostheses on dental implants and also medical implants [19][20][21][22]. Several in vitro studies and finite element analyses were conducted to explore stress transmission at both the implant and peri-implant levels, employing various restorative materials for implant-supported prostheses [23].…”

Section: Introductionmentioning

confidence: 99%

Exploring Stresses in Mandibular Jawbone during Implant Insertion: A Three-Dimensional Explicit Dynamic Analysis

K N,

Eram,

Shetty

et al. 2024

Prosthesis

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In dental implant insertion, an artificial foundation is prepared for the prosthetic device, which involves the surgical positioning of the implant in the jaw bone. The success of dental implants relies on the osseointegration process. The biomechanical factors, such as stress and strain, developed during the insertion affect the jawbone and its surroundings. In this current study, the stresses during the implant insertion in the mandibular jawbone bone are analyzed using three-dimensional explicit dynamic analysis, and the Cowper–Symonds model is implemented with the damage model. The implant’s design has a substantial impact on stress distribution within the cancellous bone during the insertion procedure. The stress variation takes place as the implant moves into the pre-drilled hole. This is because of the contact between the bone and the fixture on the implant. The upper edge of the predrilled site shows that the stresses are more at the crestal region of the implant due to surface area. There is a gradual increase in the stress level as the implant reaches the lower edge from the top edge. This is because of the concept of mechanical interlocking. Clinicians can use this information to anticipate and address potential stress-related challenges during implant placement.

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Wear estimation at the contact surfaces of oval shaped hip implants using finite element analysis

Cited by 17 publications

References 41 publications

Patient-specific finite element analysis for assessing hip fracture risk in aging populations

Patient-specific finite element analysis for assessing hip fracture risk in aging populations

Evaluating Angled Abutments: Three-Dimensional Finite Element Stress Analysis of Anterior Maxillary Implants

Exploring Stresses in Mandibular Jawbone during Implant Insertion: A Three-Dimensional Explicit Dynamic Analysis

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