Date of Award

8-2023

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

Peter J. Laz

Second Advisor

Kevin Shelburne

Third Advisor

Casey Myers

Fourth Advisor

Robert Dores

Keywords

Total shoulder arthroplasty (TSA), Anatomic total shoulder arthroplasty (aTSA), Reverse total shoulder arthroplasty (rTSA), Modeling, Joint mechanics, Outcomes

Abstract

Total Shoulder Arthroplasty (TSA) is a surgical procedure designed to improve joint functionality by replacing the articulation between the humeral head and the glenoid fossa. Anatomic Total Shoulder Arthroplasty (aTSA) and Reverse Total Shoulder Arthroplasty (rTSA) are two types of replacement surgery to relieve pain and restore function of the shoulder. The overall goal of this study was to evaluate the effects of variation of certain patient and implant alignment parameters that may influence long-term outcomes of these surgical procedures, including kinematics, joint loads and contact mechanics. Computational models of six TSA subjects, three aTSA and three rTSA, were created using subject-specific kinematics captured through high-speed stereo radiography (HSSR) during the abduction and forward flexion activities. Results showed the crucial role of patient-specific kinematics for obtaining accurate results, as a minor change in the kinematics considerably impacted the outputs of the models. Moreover, this study provided valuable insight regarding the impact of misalignment of the humeral stem and glenoid implants, highlighting the importance of carefully considering humeral version alignment, as higher version rotations can lead to a considerable decrease in the stability of the glenoid implant. This work emphasized the importance of patient specificity in computational modeling and has the potential to inform surgical planning to improve implanted joint mechanics and potentially patient outcomes.

Copyright Date

8-2023

Copyright Statement / License for Reuse

All Rights Reserved
All Rights Reserved.

Publication Statement

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

Rights Holder

Ignacio Rivero Crespo

Provenance

Received from ProQuest

File Format

application/pdf

Language

English (eng)

Extent

153 pgs

File Size

16.5 MB

Discipline

Mechanical engineering, Biomechanics

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