Is there empirical evidence that this order is more effective?
The essay links to this study, so yes: https://pubmed.ncbi.nlm.nih.gov/29741239/ I was a bit confused about why it would matter, but then realized I brush, then floss, then use a fluoride rinse, which isn't really addressed by the study. If you didn't use a rinse or a fluoride floss, presumably the toothpaste from brushing would be more likely to get into the areas between your teeth after flossing. If you use a fluo…
Again, "fluoridated" is not equal. In concentrations:
Drinking water << mouthwash << toothpaste (assuming all are "fluoridated").