Glen Watson, an ENT surgeon at the Royal Hallamshire Hospital needed a more accurate model to help him demonstrate benign paroxysmal positional vertigo (BPPV) to patients and educate them about possible treatments.
After a chance meeting with an AMRC engineer, it was decided that a new piece of 3D printing equipment acquired by the AMRC could be used to design and build a model that would fulfil his requirements.
BPPV is caused by displaced calcium carbonate crystals from one part of the balance organ into another part that stabilise vision on head movement. A simple but effective treatment is to perform a liberating or repositioning manoeuver, to move the crystals into a part of the balance organ where they cause no further problem.
Mr Watson said: “The model that Medical ARMC has produced on their 3D printer will enable patients to visualise what is happening and understand the disease in a simple fashion.”
The Medical AMRC decided to test the limits of its new FormLabs Form2 3D resin printer and offer to design and print a model of the labyrinth, demonstrating the semi-circular canals, free of charge as a test piece for its new capabilities. The model would be complete with movable crystals that could be seen from the outside.
Valdis Krumins, AMRC project engineer, said: “The project for Glen helped us commission and test our new Form2 3D printer. It was a useful learning process stretching the capabilities, and using the whole working envelope of the machine.
“Laser printing in resin allows us to print in translucent material and in high-definition with small intricate details compared to standard fused deposition modelling processes.”
AMRC senior project manager, Marcus Crossley, added: “The benefits of the Form2 3D resin printer is that you can work quickly, at a high resolution and in translucent material. We could print a hollow, anatomically accurate 3D model filled with liquid and ball bearings to imitate the behaviour of the crystals inside the canals. This could be seen through the material, so Glen can demonstrate the movement of them within the ear to the patients.”