Journal ArticleDOI
Finite element analysis of a subtrochanteric fractured femur with dynamic hip screw, dynamic condylar screw, and proximal femur nail implants — a comparative study:
S Sowmianarayanan,Adithan Chandrasekaran,R. Krishna Kumar +2 more
- Vol. 222, Iss: 1, pp 117-127
TLDR
The biomechanical behaviour of the femur with three different implant configurations for simple transverse subtrochanteric fracture and the intact femur is studied using finite element analysis.Abstract:
Selection of the correct type of implant for fracture fixation has become a very interesting problem in the orthopaedic community. The present work studies the biomechanical behaviour of the femur with three different implant configurations for simple transverse subtrochanteric fracture and the intact femur using finite element analysis. The implants considered in this study are as follows: dynamic hip screw (DHS), dynamic condylar screw (DCS), and proximal femur nail (PFN). The modelling software Unigraphics and finite element simulation software ANSYS are used for the present analysis. The three implants are compared for deflection, stress, and strains. The simulation also includes modelling of the cortical defect near the fracture. An estimation of the critical depth of the cortical defect based on the von Mises stress is obtained using this study on the DHS implant. The displacement and principal stress on the proximal femur have been compared for all the implant models. The stresses on the cortical screws for DCS and DHS implants have also been compared. The result shows that the DHS and DCS implants behave in a similar way to the intact femur compared with the PFN implant.read more
Citations
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Journal ArticleDOI
The importance of lag screw position for the stabilization of trochanteric fractures with a sliding hip screw: A subject-specific finite element study†
TL;DR: The result showed that the volume of bone susceptible to yielding in the head and neck region is the lowest for inferior positions and increases as the lag screw is moved superiorly, which suggests that a TAD >25 mm cannot be considered to be an accurate predictor of lag screw cut‐out.
Journal ArticleDOI
Simulation of mechanical behavior and optimization of simulated injection molding process for PLA based antibacterial composite and nanocomposite bone screws using central composite design.
Behzad Shiroud Heidari,Erfan Oliaei,Hadi Shayesteh,Seyed Mohammad Davachi,Iman Hejazi,Javad Seyfi,Mozhgan Bahrami,Hamid Rashedi +7 more
TL;DR: PLA9 screw is recommended as the best candidate for the production of biomedical materials among all the three types of screws through minimizing the shrinkage and warpage of the bone screws.
Patent
Automated patient-specific bone-implant biomechanical analysis
TL;DR: In this paper, the authors present an apparatus, method, and computer program product for providing information for surgical planning based on automated biomechanical analysis of a bone-implant system using finite element analysis of patient's 3D medical image.
Journal ArticleDOI
Experimental and probabilistic analysis of distal femoral periprosthetic fracture: a comparison of locking plate and intramedullary nail fixation. Part B: probabilistic investigation
TL;DR: Deterministic finite element (FE) models of each construct type in synthetic osteoporotic bone are introduced and the probability of periprosthetic fracture of the locking plate compared with the retrograde IM nail is investigated using Monte Carlo simulation.
Journal ArticleDOI
Computational analyses of small endosseous implants in osteoporotic bone.
TL;DR: The aim is to analyze the potential of existing finite element models of small endosseous implants in bone to aid the understanding of implant failure mechanisms with the goal of improving implant performance in low quality bone.
References
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Journal ArticleDOI
Mechanical validation of whole bone composite femur models
TL;DR: It seems that the composite tibias are suitable to replace cadaveric specimens for certain types of test, whereas they might be unsuitable for others, depending on the loading regimen.
Journal ArticleDOI
Technical noteMechanical validation of whole bone composite femur models
TL;DR: In this article, an extensive experimental validation of the whole bone composite model, compared to human fresh-frozen and dried-rehydrated specimens for different loading conditions was performed.
Journal ArticleDOI
A comparative study on different methods of automatic mesh generation of human femurs.
TL;DR: Evaluating comparatively five methods for automating mesh generation (AMG) when used to mesh a human femur demonstrated that each tested method deserves attention and may be the best for specific situations.
Journal ArticleDOI
Finite element analysis of a femoral retrograde intramedullary nail subject to gait loading
TL;DR: Novel three-dimensional finite element models, at four stages of gait, of a realistic femur analogue known as third generation composite bone and a system consisting of an intramedullary nail implanted in the femur of (i), can be used to guide future implant design and surgical procedure.
Journal ArticleDOI
Finite element and experimental models of cemented hip joint reconstructions can produce similar bone and cement strains in pre-clinical tests.
TL;DR: Two FE models of composite hip reconstructions with two different implants were validated relative to experimental bone and cement strains, indicating that both FE models were successfully validated and the prerequisite for accurately predicting long-term failure has been satisfied.