| I use an even simpler and more reliable system to avoid running out of toothpaste: brushing with plain water. Evidence suggests that brushing with toothpaste (called "dentifrice" in scientific papers) does not remove any more plaque than brushing without it. Here's a systematic review from 2016: >Does dentifrice use help to remove plaque? A systematic review https://pubmed.ncbi.nlm.nih.gov/27513809/ "The cumulative evidence for this systematic review demonstrates that there is moderate certainty that toothbrushing with a dentifrice does not provide an added effect for the mechanical removal of dental plaque." However, plaque removal is not the only purported function of toothpaste. It can also serve as a fluoride delivery system, and fluoride has strong evidence for strengthening teeth. I personally drink a lot of tea, which is a fluoride hyper-accumulator, so I'm more concerned with avoiding fluoride, but if you don't drink tea this might influence your decision to use toothpaste. There are also some toothpastes with antimicrobial ingredients. Those also have strong evidence for actually doing something, although I'm personally skeptical that messing with your mouth's microbiome like that is a good idea. Additionally, I believe that toothbrush wear is an underestimated factor in cleaning efficacy. Toothbrush bristles are manufactured with microscopic texturing that helps remove plaque. I can feel the difference when changing from a worn to a new toothbrush. Ben Krasnow of Applied Science has a video on Youtube with electron micrographs showing the difference: https://www.youtube.com/watch?v=cwN983PnJoA |