Composite Fillings
When a cavity needs filling, there are two basic choices. There is a mixture of metals called an amalgam. Or, a resin composite, consisting of ceramic or glass, blended in a plastic compound. Each has its pros and cons.
Because resin more closely matches the colour of natural teeth, they tend to be less noticeable. This has made them popular. Plus, due to the flexibility of composites, they generally require less drilling.
Once the decay has been removed and the surface prepared, the composite will be laid down in layers. A special light is used to harden each layer. After final shaping to insure a proper bite, the composite filling is polished.
The downside? Composite fillings may not last as long as amalgam fillings in certain situations where the cavity is well beneath the gum level. Additionally there have been some concerns about composites releasing toxic elements as they age, but then mercury toxicity maybe an issue too with amalgam restorations.
Silver fillings are known to generate cracks in teeth over the years eventually leading to cusps fracturing and the tooth needing a crown.
The bottomline is there is no such thing as a ‘perfect’ filling material . It is much better to try and prevent the need for fillings in the first place . Regular check ups and cleans, good brushing, and a sensible diet is the way to go!.