Almost every filling we do is made with the tooth-colored material call “Composite”. Sometimes people mistakenly call them porcelain fillings. It is called a composite because it is a mixture of resin and small glass-like materials that make the fillings strong and smooth. Once the decay is removed, the tooth is filled with a composite material which is then cured (hardened) using a specialized light. Composite fillings can be done in one visit and are completely ready to go as soon as the appointment is over. Because we are bonding (glue) the fillings into the teeth, we don’t need to make the hole in the tooth any larger than the damage the decay caused. The old metal fillings didn’t bond to the teeth and large excavated areas needed to be prepared to hold the material. Back in the 70’s and 80’s, tooth-colored fillings were still too soft to use in back teeth, and they turned yellow or brown after a few years. As with almost everything else, they have come a long way since then. A tooth-colored filling is now a stronger, more predictable filling than the old metal ones used to be.