Do you prefer an electric toothbrush? You’re not alone. A 2017 study found that nearly one-third of people use them, and often, dentists recommend electric toothbrushes to those with gum recession, unique mouth shapes, and a habit of brushing too hard. Regardless of your brush preference, bristles wear at the same rate – which means you should be changing out those electric toothbrush heads every three months. Need help staying on top of it? Here’s a handy guide.

Headed to a graduation party this season? The graduate probably doesn’t need another laundry basket or daily planner—but most college students could use a little help with their oral health. Incoming college freshmen have likely relied on their parents to make dental appointments in the past and may not be very proactive in making their own