I went to a new dentist in Austin last month and she watched me brush for maybe 10 seconds before stopping me. Turns out you're supposed to hold the brush at a 45 degree angle toward your gums, not just scrub straight across like I've been doing since I was a kid. She said I've been missing all the plaque along the gumline that way. Has anyone else had a routine habit totally turned around by one professional observation?
Wait, did you see that thing going around about how most people brush too hard and wear down their enamel over time? I read somewhere that a lot of dentists recommend soft bristles and gentle circles instead of scrubbing back and forth. Maybe your new dentist is just trying to protect your teeth long-term, even if your old ones never mentioned it.
Gotta call this one out. I've had three dentists over the years and none of them ever said a word about my brushing technique. Pretty sure if I was doing it that wrong for that long, my gums would be a mess by now. My teeth are fine and my hygienist always says I'm doing a good job. Sounds like your new dentist might just have her own preferred way of doing things, not necessarily the only way.