For me, it’s an electric toothbrush. It doesn’t matter if you go with Sonicare or Oral-B, once you start using an electric toothbrush, regular toothbrushes don’t ever feel like they clean your teeth properly. The smooth plaque-free top layer of your teeth that you can feel after using an electric toothbrush can’t be replicated with a regular toothbrush.
I agree with this. I have a friend who is a pediatric dentist and she said to get a sonic toothbrush and use it the rest of my life. It immediately made a difference and I credit it and regular thorough non-alcohol mouthwash rinsing with keeping dental infections at bay, which I was prone to beforehand.