If a single spot on one of your teeth is not cleaned daily, the remaining bacteria will transform themselves into a sticky film substance called plaque. The plaque will produce acids which eat away at the enamel of the tooth and will eventually cause cavities. When the cavity gets through the enamel, into the underlying tooth structure (the dentin), repair or restoration is necessary.
If there is sufficient tooth structure remaining after removal of all the caries, a filling is placed.
Composite fillings are the newest type of filling in common usage. They are a porcelain/plastic hybrid that is bonded directly to the cavity preparation. Composite fillings were created as an alternative to traditional metal dental fillings. They are coloured to look like natural teeth and are more aesthetically pleasing than amalgam or gold fillings. They are also strong, durable, and make for a very natural looking smile.