The latest advance in 3D printing: replacement teeth – Dominic Basulto for the Washington Post Saturday 31 October 2015 07.00 EDT


Bacteria-fighting plastic could be the future of dentistry

3D-printed teeth

This dental replica was made using a 3D printer. Researchers are now working on ways to make 3D-printed teeth resistant to bacteria. Photograph: Stratasys

The latest 3D printing innovation could change the way you think about your visit to the dentist. That’s because Dutch researchers at the University of Groningen are working on the creation of a 3D-printed tooth made of an antimicrobial plastic that kills the bacteria responsible for tooth decay on contact.

Imagine teeth that remain white and pristine over time, without all the accumulation of bacteria that cause dental problems. While the thought of having a 3D-printed tooth inside your mouth might not sound so great, is it really any worse than dealing with the constant toothache from a decaying tooth?

For the Dutch researchers, the key step in developing the bacteria-fighting tooth was being able to find the right material to put inside the 3D printer. In this case, the researchers embedded antimicrobial quaternary ammonium salts inside existing dental resin polymers. Once this mix is put into a 3D printer, it can be hardened with ultraviolet light and used to print out 3D replacement teeth.

To test the bacteria-fighting tooth in a lab environment, the researchers coated the material with human saliva and exposed it to the bacterium that causes tooth decay. The anti-bacterial tooth killed more than 99% of all bacteria and showed no signs of being harmful to human cells.

Article continues:

http://www.theguardian.com/technology/2015/oct/31/3d-printing-plastic-replacement-teeth

 

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