Sometimes, tooth damage is so extensive that it cannot be treated with standards filling procedures. In such situations, an inlay or onlay might be your best bet. Conventionally, inlays were used to treat damages due to tooth decay and acted as fillings. They lay inside the tooth and were traditionally made of gold. Here are some more useful information from www.dreppingdentists.com.au to give you a better understanding about dental inlays and onlays.