MECHANICAL & NUCLEAR ENGINEERING
MNE522
3D Printed Ear Canal Models
Project Team: Ahmad Ali, Rosheena Hairston, Hunter Locks
Faculty Adviser: Hong Zhao, Ph.D.
Sponsor: VCU Otolaryngology
Mentor: Daniel Coelho, Ph.D.
A multi-material ear canal model was designed and created from CT scans of an actual patient. This
ear canal model serves as a training model for trainees, surgeons and doctors to develop a better
understanding of the anatomy and physiology of the ear by physically looking, touching and testing
the model. The major task taken was to establish and identify the area of interest provided with the
files of medical scans by using 3D Slicer. The files were then converted to a stereolithographic (STL)
file where it was able to be edited for smoothing in programs such as Meshmixer or MeshLab in
order to 3D print a high quality model that could be used effectively. An operate model was obtained
that satisfied the given need for ideal surgical training purposes; where the design is composed of a
two piece multi-material model – the outer ear is flexible and the inner ear canal is rigid. A replicated
membrane is attached to the end of the inner ear canal to represent the tympanic membrane. Lastly,
the entire model is mounted on a magnetic stand that has a 360° rotation for trainees or doctors to
adjust for ideal positioning.
This project was very informative; while being educated on the current health needs, we were also able
to serve the local physicians by producing the requested devices. The ear canal model is ready to use
and can be used for a pre-surgery mechanism to allow for resourceful practice. Trainees in particular
who are just beginning to learn can take advantages of using this model. Common type of surgery
performed includes Otitis Media with effusion (OME), which is the accumulation of fluid buildup, often
in the middle of the ear, with no sign or other symptoms of an ear infection. Roughly about two million
cases of otitis media with effusion occur annually in the United States.