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Fillings

Why do fillings need replacing?

Fillings don’t last forever. Over time they can leak at the edges, crack, wear down, or develop decay around them. Replacement doesn’t always mean the original work was poor—mouths change, bite forces vary, and materials age. The important question is whether the filling is still sealing the tooth and supporting it safely, or whether it’s now increasing fracture or decay risk.

Failing amalgam filling Leaking composite filling

Why this is recommended sometimes

Fillings may be replaced due to:

  • recurrent decay
  • cracks or wear
  • marginal leakage
  • symptoms

Common alternatives

  • monitor if stable and symptom-free
  • repair rather than replace (in select cases)

Risks & long-term considerations

  • each replacement can remove more tooth structure
  • larger restorations can increase fracture risk

Questions to ask your dentist

  • Is replacement essential now or can we monitor?
  • Is repair an option?

When to seek urgent in-person care

Severe pain/swelling/fever/trauma requires urgent care.