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Composite fillings are a mixture of plastic and fine glass particles. The disadvantages of composite tooth fillings include a higher cost than amalgam ("silver") fillings. Getting a composite filling may take a little longer than getting other types because the area has to be kept completely free of saliva while the filling is being placed. Composite fillings also may not withstand heavy pressure from chewing the way amalgam fillings can, and they may not last as long. In rare cases, the composite may shrink after it is placed, which can lead to more cavities if there is a gap between the filling and the tooth.
There are several disadvantages of composite tooth fillings, which are a mixture of glass or quartz filler in resin and are tooth-colored:
- Composite fillings may cost more than amalgam fillings (a stable alloy tooth filling made of about 43 percent to 54 percent mercury with other metals)
- They may take longer to place in the tooth.
- Composite fillings may discolor over time.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.