Imagine if doctors could simply print the tiny bones to restore hearing. Sounds futuristic, right? Well, it actually happened back in 2019.
A 40-year-old man who had lost his hearing after a car accident-was able to hear again-
after receiving the world’s first middle ear transplant using 3D printed Titanium bones.
The procedure was carried out by Mashudu Tshifularo and his team at Steve Biko Academic Hospital in Pretoria. This breakthrough opened for new possibilities for treating patients suffering from conductive hearing loss.
So, what exactly is conductive hearing loss?
Inside the middle ear there are 3 small bones called ossicles-- the malleus (hammer), incus(anvil) and stapes(stirrup). These bones are responsible for transmission of sound vibrations from the eardrum to the cochlea, so we can hear.
When these bone are damaged due to injury, infection, congenital defects, or metabolic disease - transmission of sound becomes disrupted, which leads to conductive hearing loss.
Traditionally, Surgeon’s replaced damaged bones using prostheses made from stainless steel or ceramics-but these implants fails because it is difficult to achieve precise size and fit needed for such tiny structures.
Role of 3D Printing
Research by Jeffrey D. Hirsch at the University of Maryland school of medicine- showed that 3D printing could accurately replicate ear bones using CT imaging.
This means implants can now be custom made to match a patient’s exact anatomy.
Building on this idea- Prof. Tshifularo’s and his team - used CT scans of patient’s ear to design and print customized titanium ossicles.
Titanium was chosen because it is biocompatible, durable, and widely used in medical implants.
The surgery
The team replaced all the three ossicles using 3D printed titanium bones.
the procedure was performed - endoscopically and completed in less than 2hours, with minimal scarring.
since only the damaged parts were replaced, the risks associated with traditional surgery- like facial nerve injury- were reduced.
just 2 weeks after surgery- the patient showed a significant improvement in hearing.
This breakthrough shows how modern medicine bringing together fields like- engineering, radiology and surgery to develop better treatments.
By using CT scans and 3Dprinting - doctors can now design implants that perfectly match a patient’s body.
As this technology continues to evolve, it could completely change how we treat hearing loss.
If we can print tiny ear bones today, could we one day print entire organs for patient’s need?
Share your thoughts on it.
MBH/PS