All Categories : Technical White Papers : CAE and FEA Bookmark and Share

Title : Periprosthetic Stress Shielding In Patello-Femoral Arthroplasty: A Numerical Analysis
Company : SIMULIA
File Name : periprosthetic-stress-shielding-patello-femoral-2011.pdf
Size : 51820
Type : application/pdf
Date : 09-Jul-2011

Rate This File
5 Stars
4 Stars
3 Stars
2 Stars
1 Star

Total knee replacement gives proven good results for isolated patello-femoral osteoarthritis, but patello-femoral arthroplasty may be more appropriate because only the joint compartment is replaced. Although the femoral component of a patello-femoral prosthesis is smaller than in total knee arthroplasty, it is unknown whether strain-adaptive periprosthetic bone remodeling occurs following patello-femoral arthroplasty. The aim of the study was to evaluate and compare the stress shielding effect of prosthetic replacement with Finite Element (FE) modeling. Four FE models were developed to investigate the effects of different patellofemoral replacement designs; we compared the stress shielding effect in the distal femur between a physiological model of knee, the Richards type II patellofemoral prosthesis, the Journey PFJ prosthesis, and the Genesis II total knee prosthesis. The geometry of the knee joint was obtained from a MRI of a patient. Von Mises stress was evaluated in the same regions of interest as in the experimental analysis, during a loaded squat until 120° of flexion, similar to previous experimental tests performed on knee kinematics simulators. During knee flexion the Journey PFJ has a similar trend of the physiological knee; the Richards II PFJ has higher stress shielding than the other PFJ model and in the Genesis II TKA the stress shielding is higher compared to the PFA models. The results agree with experimental DXA literature results; in particular they demonstrated that, during knee flexion, the magnitude of the Von Mises stress behind the anterior flange was about the same for the physiological model and for the Journey PFJ but smaller for the Richards II. This stress shielding effect of the Richards II was most obvious around 90 degrees of flexion. This phenomenon can possibly be explained by the particular design features of the Richards II. In the proximal region of the bone the values of the Von Mises stress were about the same magnitude for the physiological model and for both patello-femoral prostheses and also these findings are in agreement with the experimental DXA outcome.
User Reviews More Reviews Review This File

SolidCAM - See For Yourself

Featured Video
Editorial
Latest Blog Posts
Sanjay GangalMCADCafe Lens
by Sanjay Gangal
NVIDIA GTC October 2020 Keynote
Jobs
3D Designer and Developer for Los Alamos National Laboratory at Los Alamos,, New Mexico
Mechanical Engineer for Flextronics at Milpitas, California
Failure Analysis Engineer for Flextronics at Milpitas, California
Structural Engineer for Kiewit at Lenexa, Kansas
Structural Engineer 2 (Engineer 2) for Los Alamos National Laboratory at Los Alamos,, New Mexico
Architect for Hutton at Wichita, Afghanistan
Upcoming Events
DEVELOP 3D Live 2020 New Date November 3rd at Sheffield University ctagon and INOX Building, Durham Road Sheffield United Kingdom - Nov 3, 2020
Digital Twin 2020 - Now in November 2020 at Melbourne FL - Nov 4 - 5, 2020
Sensors Expo & Conference at McEnery Convention Center SAN JOSE CA - Nov 16 - 18, 2020
Spatial 3D Insider Summit - Free VR Event! at United States - Nov 16 - 17, 2020
Kenesto: 30 day trial



© 2020 Internet Business Systems, Inc.
670 Aberdeen Way, Milpitas, CA 95035
+1 (408) 882-6554 — Contact Us, or visit our other sites:
AECCafe - Architectural Design and Engineering EDACafe - Electronic Design Automation GISCafe - Geographical Information Services TechJobsCafe - Technical Jobs and Resumes ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy PolicyAdvertise