Honors Theses


Allison L. Kinney, Ph.D.


Mechanical and Aerospace Engineering

Publication Date


Document Type

Honors Thesis


A reverse total shoulder arthroplasty (RTSA) is a common treatment used to stabilize the shoulder and improve range of motion in patients with torn rotator cuff muscles. Shoulder stability relies on the shoulder muscles. With rotator cuff tears, the RTSA enables the deltoid muscle to become the primary stabilizer of the shoulder joint. To improve stability, RTSAs increase the deltoid muscle moment arm and decrease the required torque about the shoulder joint for movement. Currently, there is not standardized, objective method for a surgeon to position an implant on a specific patient. This study is part of a larger, ongoing project to optimize the deltoid muscle force for a population of RTSA patients and create a tool to determine the ideal placement of the implant based on the optimal deltoid force. The current study was a step towards the overall goal by investigating patient-specific muscle model parameters and establishing a framework for understanding deltoid muscle function in RTSA patients. This goal was achieved through a parameter sensitivity study and optimization studies.

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Undergraduate research


Aerospace Engineering | Mechanical Engineering