Patients frequently enquire whether existing amalgam restorations should be replaced. The evidence supports a specific answer that differs from both common assumptions.
The safety question
Major health authorities and systematic reviews have consistently found no evidence of harm from amalgam restorations in situ in the general population. Removal is not indicated on health grounds.
Removal itself produces a transient increase in mercury exposure, which is the principal argument against elective replacement of sound restorations.
When replacement is indicated
Recurrent caries at the margin. Fracture of the restoration or of the surrounding tooth. Marginal breakdown permitting leakage. Persistent sensitivity attributable to the restoration.
Cracks radiating from a large amalgam, which is common in restorations of this age, since amalgam does not bond to the tooth and large ones effectively wedge the cusps apart under load.
The structural consideration in older restorations
Large amalgams placed decades ago frequently have thin remaining cusps that are at genuine risk of fracture. Where a cusp fractures, treatment becomes considerably more extensive than elective replacement would have been.
This constitutes a legitimate structural indication distinct from any concern about the material itself.
Recommendation
Sound amalgam restorations with intact margins and no supporting cracks warrant monitoring rather than replacement. Restorations exhibiting the features above warrant replacement on structural grounds.
Where replacement is undertaken, isolation and high-volume suction reduce exposure during removal.
The decision should rest on the condition of the restoration and the remaining tooth structure, not on the material. Elective replacement of sound amalgams is not supported by evidence.
For an individual assessment of your case, you can request a consultation at our Bogotá practice.
