Do You Really Need That Filling? Getting a Second Opinion

By Dr. Boris Zusin · Published August 22, 2026

Fillings are routine, which is exactly why it can feel odd to question one — but being told at a new-patient visit that you suddenly need several fillings at once, especially for cavities you weren't told about at your last checkup, is one of the more common reasons patients seek a second opinion.

Diagnosing a Cavity Isn't Always Black and White

Early, shallow cavities are sometimes borderline calls rather than obvious ones, and research on this has found real variation between examiners. A study comparing dental students' caries assessments and restorative treatment decisions against normative standards found significant misdiagnosis and a meaningful degree of overtreatment proposed for teeth that didn't clearly need it — a reminder that “does this need a filling” isn't always a single obvious answer, even among trained clinicians.

When a Second Opinion Makes Sense

It's worth asking for one if several fillings are recommended at once with little explanation, if a tooth flagged for a filling isn't causing you any pain or sensitivity, or if you're simply unsure why a particular tooth needs treatment now rather than being watched. Very early lesions can sometimes be managed with fluoride and better home care instead of being drilled and filled right away — it depends on how deep the cavity actually is.

What We'll Do

We'll look at the same X-rays and give you a straightforward answer: confirm the filling is needed, suggest watching a borderline area instead, or flag something worth discussing with your original dentist. See what happens if a real cavity is left untreated for the other side of this decision.

Contact us to schedule an exam or second-opinion visit.