Cavity fillings fill in the space created by a dentist's drill after removing areas of dental decay. Dental fillings prevent the cavity, or space in the tooth, from trapping further food debris and bacteria thereby preventing future tooth decay and tooth pain.

Does filling a cavity hurt?

Do cavity fillings hurt? Although you can expect some tenderness and soreness during the first few days after you get a tooth filled, they shouldn't. It's a good idea to call your dentist if that discomfort persists for more than a week. Your dentist can adjust the filling, so it's a better fit.

How long do dental fillings last?

On average, you can expect a metal filling to last for about 15 years before needing to be replaced, but the length of time can vary based on several factors, such as if you grind or clench your teeth. Tooth-colored fillings are made from a mixture of fine glass and plastic particles.