Flossing

[Angrboda]

Brushing can miss the plaque or food that sits in the gap between the teeth, and that can lead to tooth decay. Thus the emphasis on flossing. While I'm glad for you, one counter-example does not demonstrate that flossing is not important.

The AP looked at data from 25 studies conducted over the past decade. The studies generally compared the use of a toothbrush alone with combined use of a toothbrush and floss.

Those studies concluded the evidence for flossing is "weak, very unreliable," of "very low" quality, and carries "a moderate to large potential for bias."

One review went further, saying that the "majority of available studies fail to demonstrate that flossing is generally effective in plaque removal," the AP reported. Another said there was only "inconsistent/weak evidence" for flossing and a "lack of efficacy."

(Web MD)