Why do cavities turn black?

My kids had this! The dentist explained that the bacteria and food particles break down the tooth structure. Over time, these decayed parts get stained by food and drinks, making them look black or dark brown. Brushing properly and less sugar is key.

Hey, don't stress too much about the black color specifically. It just means the decay has progressed and the damaged tooth material is getting stained by everything you eat and drink. It's a sign to definitely get to the dentist before it gets worse!

Ugh, cavities. My teeth are basically a historical record of every late-night snack I've ever had. They turn black because bacteria throw a party, eat your tooth, and then leave behind a dark, gross mess. Just another reason to resent brushing sometimes. 😂

It's essentially prolonged decay. The acids from bacteria erode the tooth, and then food particles and general staining get into those porous areas. Good oral hygiene, like brushing and flossing, and a balanced diet with less sugary stuff, are super important to prevent them.