If you have a cavity you will need a dental filling to prevent further tooth deterioration. There are different types of fillings that vary in materials and appearance.
Composite fillings are most commonly used in today's dentistry. They are also called tooth-coloured or white fillings as they closely resemble your natural teeth colour, which makes them popular.
Amalgam material has been used in dentistry for a very long time. However, the use of amalgam is on the decline. The main reason is that it is not as appealing as porcelain filling. Another reason is that some patients are becoming concerned with the small amount of mercury in amalgam fillings.