Comment on Toothbrush heads
victorz@lemmy.world 1 week agoI believe you, but I’m also interested in the studies, how much worth it it actually is.
Like, is it worth it because people in general have poor brushing technique and the electric brush “solves” this just by how it works, or is it better even with proper brushing technique with manual brush?
Those are some of the questions I have. 😁
iamthetot@piefed.ca 1 week ago
Here’s just one of said studies. https://pmc.ncbi.nlm.nih.gov/articles/PMC3652371/
elephantium@lemmy.world 1 week ago
From that study:
LOL! I do not think that means what they thought it means. Kinda hard to keep the participants from knowing which study group they’re in.
Still, interesting setup. 60 dental students makes sure that the control group brushing manually is doing so with proper technique. They were getting the best-case scenario for manual brushing.
iamthetot@piefed.ca 1 week ago
Can it not still be double blind if the participants don’t know precisely what is being measured or studied? For example, perhaps they know they are involved in a toothbrush study, but not that one group will have different brushes, or precisely what measurements are being taken.
elephantium@lemmy.world 1 week ago
No. Double blind means that both the researchers and the participants don’t know who is in which group (control group or experimental group). The idea is to avoid spoiling studies with the placebo effect.
It’s kind of hard to avoid knowing that you’re in the control group when you’re being asked to brush with an old-fashioned toothbrush instead of an electric one.