Pacifiers and thumb sucking: do they harm teeth?
10 August 2026 · 5 min read
Sucking is normal in babies, but the type, frequency and duration shape the bite. Here's when to wean and what to watch for.
Normal sucking in the first 3 years
Non-nutritive sucking — pacifier or thumb — is normal and soothing in the first 2–3 years and rarely affects the bite. The jaw is growing, so mild open bite from a pacifier often self-corrects once the habit stops before age 3.
When sucking starts to matter
Beyond age 3, especially if sucking is intense, frequent, or continues past age 4, it can push the front teeth forward, narrow the upper arch, and create an open bite or crossbite. A pacifier is generally easier to wean than a thumb, so we usually suggest reducing pacifier use by 2 and stopping by 3.
How weaning usually goes
Reduce daytime use first, keep it for sleep only, then phase it out gradually. Avoid bitter nail-biting liquids or sudden disappearance without explanation. If the bite has changed, we can check the jaw and teeth growth at an early assessment and guide the bite back as the habit fades.
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