I came across this electronic toothbrush on Indiegogo and thought it was an interesting concept. Would save time or at least allow you to get a more thorough clean in the same amount of time. Gimmick or not?
https://www.indiegogo.com/projects/babahu-x1-1st-ai-powered-…
Not cheap but comparable to other electric toothbrushes in the market.
Amabrush was the big one that launched on Indiegogo (raised over 7 mil). I think it's really interesting. I was half tempted to buy it but I didn't because I ultimately didn't want to deal with such a small company in case something went wrong. Also, they never really posted much evidence at the time if it was even that effective compared to regular brushing. If at the right price, I would buy one just to do in the morning, and then properly brush my teeth at night with my toothbrush.