Date of Award

2022

Document Type

Masters Thesis

Degree Name

M.S.

Organizational Unit

Daniel Felix Ritchie School of Engineering and Computer Science, Mechanical and Materials Engineering

First Advisor

Chadd Clary

Second Advisor

Paul Rullkoeter

Third Advisor

Mei Yin

Keywords

Contact simulation, Patient specific guide, Total knee arthoplasty

Abstract

This study proposes a novel computational method to quantify guide stability for Patient Specific Instrumentation (PSI) guides. A finite element contact model was used to analyze the final position of PSI guides on a femur across a range of loading parameters representing forces applied by a surgeon during operative use. Separate segmentation methods were used for the guide and bone geometry to represent differences between segmentation and actual patient geometry. The region of loading parameters over which the guide exhibited a consistent final position was measured and reported as Guide Stability Score. The model was verified using cadaver specimens for which 3D printed PSI guides were applied to the knee using similar variations in guide loading. A strong correlation was found between the Guide Stability Score and the variance seen in the lab (R2 = 0.84), suggesting the model provides a useful tool for the evaluation of PSI guide stability.

Publication Statement

Copyright is held by the author. User is responsible for all copyright compliance.

Rights Holder

Vincent Nierste

Provenance

Received from ProQuest

File Format

application/pdf

Language

en

File Size

47 pgs

Discipline

Mechanical engineering, Biomechanics, Medical imaging

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