If you think about it, the basic concept of a toothbrush hasn’t evolved since… forever. Sure, many people have switched to an electric toothbrush, but it remains a stick with a brush at the end.

Willo thinks that’s not good enough. The company has developed an oral care device to improve brushing with a focus on plaque. The company says that basic brushing only cleans 42% of dental plaque, while electric brushes clean 46% of dental plaque.

The startup has worked with dentists to design its product. It still sounds a bit mysterious, as the company isn’t sharing much about the product. The photo above is the only image of the product right now.

But what we do know is that the startup has raised a $7.5 million funding round led by Kleiner Perkins, with Bpifrance and Nest co-founder Matt Rogers also participating. The company was founded by Hugo de Gentile, Ilan Abehassera and Jean-Marie de Gentile, and it attended The Refiners accelerator program.

Now let’s see how it actually works, how much it costs and if people are willing to change everything about the way they brush their teeth.