White fillings, also known as composite fillings, are made with a special resin.
Whether or not you get a white filling depends on where the cavity is. Because white fillings aren’t as strong as regular fillings, they’re not as good for back teeth (molars) where you bite down hardest. Talk to your dentist about options.
To place this filling, your dentist cleans all decay from the tooth and puts a special glue inside the hole. The resin is then put into the hole in thin layers. Each layer gets hard with the help of a light that your dentist holds over the tooth. When the last resin layer is hard, your dentist shapes the top of the filling so it looks and feels natural.