Teeth that are heavily filled with silver/mercury amalgam fillings can become problematic as this type of filling material actually weakens the tooth. Aesthetically few patients like the look of a silver/mercury filling as it can darken the tooth and is noticeable when a patient smiles. Most silver/mercury fillings are placed by packing and wedging the filling into a cavity.

During chewing, forces on the filling can lead to cracks appearing in the surrounding tooth as the tooth is wedged apart weakening and reducing the life expectancy of the tooth.

There is also controversy as to whether the mercury from fillings leaks out into your body causing general health problems. Both Sweden and USA have recently banned mercury containing fillings; whilst the current guidelines from the UK department of health is not to allow such filling materials in pregnant women. Tooth coloured composite or porcelain filings are a more aesthetic and functionally long term healthier option.