Good Afternoon, Everyone
Welcome to our webinar on modeling and simulating patient-specific implants. This session will cover the design and simulation of these implants for activities of daily living. We will explain what we mean by that shortly.
About Ozen Engineering
This webinar is brought to you by Ozen Engineering. Ozen Engineering has been America's channel partner of the year three times in the past. We provide consulting, sell ANSYS software, and train engineers on using ANSYS.
Webinar Overview
In this webinar, we will explore the following topics:
- How medical implant companies can design, analyze, and optimize implants for activities of daily living and specific patients using patient-specific data.
- The procedure to develop medical implants for specific patients and activities of daily living.
Simulation Techniques
We achieve this by coupling musculoskeletal simulation with finite element analysis (FEA).
Musculoskeletal Simulation
- Provides muscular forces, joint motion, joint reaction forces, and inertia information needed for FEA.
- Outputs quantitative data, such as muscle forces and joint reaction forces.
- Can be used for ergonomics, occupational health, orthopedic evaluations, and sports activities.
Finite Element Analysis (FEA)
- Starts with CAD geometry, specifically bone geometry for patient-specific data.
- Involves meshing the model and performing convergence studies.
- Solves stiffness matrix equations to determine displacements and stresses.
- Can handle linear, non-linear, and dynamic analyses.
Application and Benefits
Musculoskeletal simulations and FEA can be applied to:
- Design tools, equipment, furniture, and orthopedic implants.
- Fit different body sizes and disabilities, plan surgeries, and design rehabilitation programs.
- Reduce prototype costs and improve time to market.
- Conduct biomechanics research.
Integration of Simulations
The integration of musculoskeletal simulation and FEA allows for:
- Patient-specific geometry scanning and modeling.
- Dynamic load application for activities like biking and swimming.
- Optimization of implant designs through single and multi-objective optimization.
Case Study: Implant Design Evaluation
Our engineers presented a paper at the ASME Biomed Conference titled "Activities of Daily Living and Implant Design Evaluation of a Fixed Plate Implant During Bicycle Pedaling." We collaborated with Specialized Bike to extract cycling data and perform simulations.
Findings
- Evaluated different plate thicknesses for fatigue life.
- Determined fatigue cycles and stress distribution.
- Compared simulation results with FDA-required four-point bending tests.
Conclusion
In summary, the procedure outlined here creates realistic simulations for medical device implant performance. It can be used for:
- Personalized implants optimized for skeletal location and daily activities.
- Comparing new implant designs with existing market options.
- Evaluating implant performance for different population groups.
- Performing sensitivity analysis and shape optimization.
Contact Us
Ozen Engineering is headquartered in Sunnyvale, California, with offices in Durham and Maryland. For more information, please contact us via phone or email.
Questions?
Thank you for your attention. We now open the floor to any questions you may have.
Good afternoon everyone. Welcome to our webinar on modeling and simulating patient-specific implants. This includes designing and simulating these implants for activities of daily living. We will explain what we mean by that. This webinar is coming from Ozen Engineering.
Ozen Engineering has been America's channel partner for ANSYS for three years. We do consulting, sell ANSYS, and train engineers on ANSYS.
In this webinar, we will explore the following topics: * Medical implant companies can now design, analyze, and optimize their implants for activities of daily living and specific patients, using patient-specific data. * Each implant can be customized for any person and any activity of daily living. * We will discuss the procedure for achieving this, including coupling musculoskeletal simulation with finite element analysis.
Musculoskeletal simulation provides muscular forces, joint motion, joint reaction forces, and all the inertia information needed for finite element analysis.
Once the input from musculoskeletal simulation is input into finite element analysis, you get the displacement, stresses, strains, fatigue life, and answers to whether the implant will fracture under certain load conditions. The musculoskeletal simulation provides specific, quantitative data.
For example, if someone is pushing a bed, you can determine the least effort required and the loads in the elbows and muscles. The input for a muscle or skeletal simulation includes muscles, bones, joints, and motion, as well as any other loads on the model.
The outputs are muscle air forces and joint reactions, which are used as input for the finite element model. Muscle or skeletal models can be used for any type of ergonomics, including ingress, egress, driver's fatigue, occupational health, orthopedics, and sports activities.
With finite element analysis, you start with a CAD geometry, such as bone geometry, which can be scanned for patient-specific data. You then mesh the solid model and solve the equation for displacement.
The ideal information flow is such that you start out with a patient-specific geometry, bring it into the musculoskeletal model, go to the finite element model, specify the boundary conditions, and run the musculoskeletal model, bringing in the loads from there.
You can expand the use of activities of daily living with a library of musculoskeletal simulations.
For example, you can look into anyone carrying heavy loads, exercising, sitting in a chair, bike conditions, rowing conditions, and create a library of activities of daily living for patient-specific data.
With simulation, you can accelerate the procedure and still have to do some testing to verify the finite element model.
You can extract stresses, displacements from the finite element model for activity, and address the strength of the implant, as well as any questions with respect to the fatigue and life cycle of the implant itself.
You can optimize the design by putting it through the optimizer and do not only single objective optimization but also multi-objective optimization. Thank you for your attention. We are open for any questions you may have.
