They've come up with a toothpaste made of crab and beetle shells which can help stop infections in your mouth.
The toothpaste contains tiny particles of crab shells, which are filled with a special ingredient which kills bacteria.
No flavour
They can't be washed away easily, and the drug slowly seeps out of the sticky particles.
So far, scientists at Portsmouth University who developed it, have only made a basic toothpaste, with no flavour or fluoride.
But they hope a usable version of the paste could go on sale in about a year.
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