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https://pubmed.ncbi.nlm.nih.gov/35451656/

Conclusions: Interproximal gingival inflammation may be significantly reduced by toothbrushing alone, the effect being significantly enhanced when toothbrushing is combined with dental floss.

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I have always been an infrequent flosser, but deep down I've hoped for something like this to reach mainstream scientific consensus for a while so I no longer beat myself over it. Fingers crossed this is not a skewed study
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At my dentist’s recommendation I’ve been using Proxabrush every day. It is very important not to force it, and my teeth are very tight so I had to get the smaller ones (I even have trouble flossing between some) but I had some early decay between some teeth and these seem really good with trapped material before regular electric brushing.
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Water flosser.
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I told my dentist how much I liked my water flosser, and he immediately said "that's fine but it's not very effective, you still need to use regular floss too".
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Meanwhile my dentist said I should be using a water flosser instead of regular flossing.
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Came to post this. These things are frigging amazing and like $20. Absolutely everyone should have one. Really you can floss and brush and it still gets stuff. I wish they existed when I was younger! Buy one! Thank me later!

On the 'dentists don't really know what they're doing' front, my kid's orthodontist ($$$$) describes himself as a "fencing contractor". Conversely, I got the water flosser tip from an Indonesian dentist who I hired opportunistically on holiday for a clean; he turned up in flip-flops but decanted to bare feet during operating and gave the most sage advice I've ever had in 40+ years of dentists: BUY A WATER FLOSSER. Terimakasih, Doktor!

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I regularly get food particles out of my molars using floss that brushing wouldn't have been able to, so for me it works.
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> actual evidence that flossing is helpful seems pretty limited

If I don't floss my breath smells terrible because of bacteria and bacteria causes tooth decay. I'm pretty certain I'm not special.

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It depends on the bacteria living in your mouth.

Some people get lucky, and even with low brushing, won't get cavities.

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Flossing is not merely essential to dislodging recalcitrant food particles, but also gives great stimulation to the gums themselves, and none of that effort is a waste, IMHO.

It is not sugar that causes dental caries, but bacteria. Flossing that old food out from between teeth is guaranteed to cut down bacteria growth!

Furthermore, my new and wonderful dentist and his hygienists wholeheartedly recommend and encourage the practice.

So perhaps you can excuse me for ignoring a singular “research study”.

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It was a systematic review, not a “singular ‘research study’”. A newer 2019 Cochrane review[0] found about the same:

> The evidence was limited in applicability and was incomplete. The included studies only presented data on gingivitis, plaque, and adverse events; most did not measure or report other important outcomes such as periodontitis or interproximal caries. … Additional use of floss or interdental brushes compared to toothbrushing alone may reduce gingivitis or plaque, or both, and interdental brushes may be more effective than floss. The evidence is low to very low‐certainty, and the effect sizes observed may not be clinically important.

[0] https://pmc.ncbi.nlm.nih.gov/articles/PMC6953268/

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I am highly skeptical. In my younger years, I brushed regularly but did not floss at all. After dealing with a surprising number of cavities over a short period of time, I decided to just start flossing, morning and night.

Not only does flossing remove quite a bit of, er... stuff... that toothbrushing does not seem to get, I have not had a single new cavity in 25 years. The only issues I've had were old fillings falling out, including one that cracked my tooth which required a crown. Not a lot of work considering the time span.

Obviously one person is not "data" but seeing as I am that one person, I'm going to keep flossing.

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