College
College of Engineering and Polymer Science
Date of Last Revision
2026-04-28 12:30:45
Major
Mechanical Engineering
Honors Course
Mece 497
Number of Credits
2
Degree Name
Bachelor of Science
Date of Expected Graduation
Spring 2026
Abstract
Leg length discrepancy is a well-documented complication of total hip arthroplasty, commonly known as hip replacement surgery. Even small differences in leg length can lead to an altered gait, increased joint stress, and long-term postural issues that may affect a patient’s overall mobility and comfort. The current method for correcting this discrepancy often involves a follow-up surgical procedure, which extends recovery time and increases the physical and financial burden on the patient. To address these shortcomings, we developed a concept for an adjustable hip implant that can be lengthened noninvasively after surgery. The design incorporates an internally housed battery and gearbox that allow clinicians to make controlled adjustments externally, eliminating the need for an additional operation. Our prototype and supporting research brought attention to a complication that many patients and even some practitioners underestimate, while also demonstrating the technical feasibility of the proposed solution. The next phase involves transforming the mechanical concept into a fully developed medical-grade prototype appropriate for clinical testing. This will require careful material selection to ensure biocompatibility, as well as a comprehensive review of applicable FDA requirements and regulatory standards before a final product can move forward in development.
Research Sponsor
Sang-Eun Song
First Reader
David Peters
Second Reader
Kai Jongho Kwon
Honors Faculty Advisor
Scott Sawyer
Proprietary and/or Confidential Information
No
Community Engaged Scholarship
No
Recommended Citation
Smith, Ethan, "Length Modulatin Hip Implant" (2026). Williams Honors College, Honors Research Projects. 2096.
https://ideaexchange.uakron.edu/honors_research_projects/2096