Editorial update:
Amalgam or Composite? Choosing a Dental Filling
How tooth condition, medical history and existing restorations affect the choice between amalgam and composite fillings.
In this article 08
Filling material is selected using more than colour: damage, moisture control, bite and medical history all matter. An intact amalgam filling should not routinely be removed solely over mercury concerns; any replacement needs a clinical rationale.
What are amalgam and composite?
Amalgam combines mercury with other metals. Composite is a resin-based restorative material that can be matched to tooth colour. Their appearance, placement methods and clinical limitations differ.
What informs material selection?
Tooth position, the size of decay or fracture, remaining tissue, bite and moisture control are assessed. Share your health history, allergies and previous material use. No material can be described as superior for every patient.
When should existing amalgam be replaced?
Fracture, recurrent decay, a fit problem or another clinical reason may justify repair or replacement. Removing a sound filling solely over mercury concerns is not routinely recommended. Removal can sacrifice sound tissue and temporarily increase mercury exposure.
How does medical history matter?
Pregnancy or pregnancy planning, breastfeeding, young age, kidney or neurological conditions and material allergy matter in the discussion. The FDA recommends considering suitable alternatives to new amalgam for certain higher-risk groups. This does not mean everyone should have sound existing fillings removed.
Which lasts longer?
Longevity depends on more than the material name. Size, location, biting forces, care and new decay risk all matter. A fixed year range cannot predict an individual outcome. Margin changes, pain or damage need assessment.
Questions for the appointment
- What finding justifies replacing this filling?
- Is a repair possible or does it need full replacement?
- Why are the alternative materials suitable or unsuitable here?
- Which symptoms after treatment should prompt a review?
Related treatment and assessment
This information does not replace an individual assessment. At your appointment, explain when symptoms began and share details of medicines and previous treatment.