Project Team
Students
Dillip Khatiwada
Mechanical Engineer
Penn State Harrisburg
Faculty Mentors
Esfakur Rahman
Penn State Harrisburg
Mechanical Engineering
Oren Gall
Penn State University Park
School of Electrical Engineering and Computer Science
Project
https://sites.psu.edu/mcreu/files/formidable/2/Poster-3.ppt
Project Video
Project Abstract
The objective of the research is to evaluate and compare the changes the knee joint goes through after Total Knee Arthroplasty (TKA) for a normal weight, overweight, and obese. TKA is an orthopaedic surgical procedure where the joint surfaces of the knee joint are replaced. TKA is one the most successful surgeries with a success rate of 85% to 90% but that does not mean it doesn’t have complications. Some of the reasons for failure after the surgery includes aseptic loosening, polyethylene wear, and instability. Even with modern medicine and technology, there are still problems with the implants. There has been lots of research on the TKA but I was not able to find specific research on the effect of the knee if the patient’s body changes. The current issue with TKA is patients need to get second surgery if the implant fails to do its job. Understanding how the knee joint changes after physical transformation will potentially help reduce the complications such as pain, aseptic loosening, periprosthetic fractures, and instability. A 3D model of size 3 knee joint was created using ANSYS. Three different loads are applied to the joint to simulate the stress and deformation for a normal weight of 130 lbs with BMI of 22.3, overweight of 160 lbs with BMI of 27.5 and 190 lbs with BMI of 32.6 to represent obesity. After comparing the result from three different loads will give better understanding for TKA patients. This research will help minimize the issues surgeons and patients go through after the TKA and help to minimize the need/cost of the second surgery. The design with 4.5mm polyethylene insert was able to withstand the most peak load with least deformation, 3.5mm design when applying 190lbs had deformation of 1.934mm compared to 4mm design which has deformation of 1.934mm. As the thickness of polyethylene increased the more loads it was able to withstand with least deformation.
Evaluate this Project
Use this form link to provide feedback to the presenters, and add your project evaluation for award(s) consideration.