BETTY LIU Works Archive About

Hip Joint Replacement

Human-Centered Design & Biomedical Engineering



                                         














2024
Fusion 360

A collaborative project focused on developing a hip joint replacement for a specific persona.
Designed to support:        

             

                    • Activity

                    • Flexibility

                    • Longevity

                   • Quick Recovery
 

◆Research


Sketch of anatomical components


Understanding the body mechanics by studying the anatomical form and biomechanics of the human hip joint.


Focusing on:

•Connection StructureMaterials
•Bone Shapes
•Joint Orientation/Range of Motion

 


◆Human-Centered Design

Empathy Map
Persona Definition
Name: Alexis

Age: 7 years old

Alexis is an energetic and determined young child with a passion for sports, especially soccer and gymnastics. She has a rare bone degeneration disease in her hip that causes pain and limits her ability to be active. 

         

Low Fidelity Prototype

Masking Tape, Tissue Paper








Final CAD Model

Acetabulum (Socket) - Stainless Steel
Plastic Liner - PEKK
Femoral Head - Alumina Ceramic
Femoral Stem (Metal Rod) - Stainless Steel

The design of the hip joint socket includes six holes intended for screws, which help distribute the load evenly and increase fixation strength. 





























  
   





























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CAD Modelling
               Initial CAD Model

The initial CAD model used ceramic (socket and femoral head) for low wear and smooth articulation, PEKK (plastic liner), and stainless steel (stem), but failed during materials testing due to brittleness and poor load distribution.

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 Final Prototype
3D Printed (PLA)