Sonic Toothbrush...
I got one of those electric toothbrushes for Christmas (I know, that was two months ago), and I tried it out last night. All my teeth felt like they had just been hit, although they haven't felt that clean since the dentist visit. The dentist recommended the toothbrush because I've got almost no gums on my bottom teeth, and the toothbrush is supposed to help support the gums.