a CLEAN TEETH BRUSH!! then BRUSH twice then use water then BRUSH AGAIN!! all brushing is without this bushing cream,... i don't wat do u ENGLISH people call it -.-
I'm not entirely sure what ridges you're talking about, but a dentist would be the best way to go. Messing with your teeth yourself probably isn't a good idea.
Dentists will often shave em' down for you, like mine did when I had to get a cavity filled.
It may not be fun, but it's better than before.
I have those haha, if you go to a dentist or orthodontist they will shave your teeth down for you.