Many people still have silver amalgam fillings in their mouths. While these fillings are not very appealing as far as their appearance, they do have a long track record for lasting under stress in the mouth for extended periods of time. They can have a longer clinical life than tooth colored fillings due to their strength, yet they do cause the teeth to be weaker and many times lead to cracking and fracturing of the tooth structure itself. Bonded fillings are much more esthetic and can be more conservative than the silver amalgam fillings. Examples of these would include composite resin, porcelain inlays, porcelain onlays, crowns, and glass ionomer fillings. These restorations blend into the existing tooth structure and are very hard to detect with the naked eye when they are done properly.