Investigation of the Load Distribution in Existing and Experimental Total Knee Replacement (TKR) Configurations to Advance Patient Outcomes

Authors: Logan Reppard, Melissa Simonik

Field of Study: Science, Technology, Engineering, and/or Math

Faculty Mentors: Melissa Simonik

Easel: 34

Timeslot: Morning

Abstract: Total knee replacement (TKR) surgical alignment is a debated topic among surgeons. Some prefer the mechanical axis alignment, which alters the patient’s biomechanics but improves the load distribution and longevity of the implant, while others prefer the patient’s more comfortable anatomic alignment, at the cost of the TKR’s longevity due to suboptimal asymmetric loading. This research seeks to measure the distribution and peak load between each component of the implants for various alignments. To do this, a Stryker TKR implant will undergo static loading in an axial load frame using custom 3D printed fixtures to simulate the different alignment types. Pressure films and flexible force sensors will collect pressure and force data, respectively, to determine the loading conditions at various locations. The goal is to then design and test wedged tibial inserts, which are hypothesized to allow for anatomic alignment and symmetric loading, proving both positive patient and implant outcomes.