Dummies, also called pacifiers, are one of the most common ways to soothe a baby, and for the first couple of years they are generally fine. The concern is duration. Research shows that children who use a dummy for longer have higher odds of a bite problem by age three, and the risk of an anterior open bite rises clearly when sucking continues past three years of age. The reassuring part is that if the habit stops early enough, a developing bite often corrects itself.
This guide explains what dummies do to teeth, when to start weaning, and gentle ways to stop the habit without a battle.
Key takeaways
- Dummy use is normal and soothing in babies and is not a concern in the first couple of years.
- Using a dummy past age three raises the risk of an open bite and a posterior crossbite.
- Duration matters more than how often the dummy is used.
- Stopping the habit before age three often lets a mild bite change recover on its own.
- Aim to wean off the dummy between ages two and three.
How a dummy affects the bite
When a child sucks a dummy for long periods, the constant presence of the teat between the teeth and the suction against the cheeks gradually shapes the growing mouth. Two changes show up most often. An anterior open bite is a gap between the upper and lower front teeth where the dummy has sat. A posterior crossbite is a narrowing of the upper jaw from the cheek pressure, so the back teeth bite on the wrong side. Studies link longer dummy habits to both, with posterior crossbite rising to around 7 percent when a dummy is used for a year or more, compared with about 1 percent for shorter use.
Why duration matters more than frequency
One useful finding from the research is that it is the length of the habit, in months and years, that drives bite changes more than how many times a day the dummy is used. A child who uses a dummy heavily but stops at two is generally better off than one who uses it lightly but continues to four. This is why the advice focuses on a target age to stop rather than on cutting down the number of uses.
Dummy versus thumb
Parents often ask whether a dummy or a thumb is worse. In practice a dummy habit is usually easier to stop because you control the object, whereas a thumb is always attached. Both can affect the bite if they continue past the preschool years. If your child sucks a thumb instead, our guide to thumb sucking and teeth covers that specifically.
When and how to wean off the dummy
A good target is to phase the dummy out between the second and third birthday. The American Academy of Pediatric Dentistry recommends weaning from non-nutritive sucking by age three. Gentle, gradual approaches work better than going cold turkey for most families.
- Limit it to sleep first. Make the dummy a bed-only comfort, not an all-day habit.
- Reduce daytime use gradually. Offer a cuddle, a toy, or distraction instead of reaching for the dummy.
- Use a milestone. A dummy fairy, a swap for a chosen toy, or a birthday can give an older toddler a positive reason to let go.
- Praise, do not shame. Encourage the progress and avoid making the child anxious about it.
- Pick a calm period. Avoid stopping during illness, travel, or other upheaval when the child needs extra comfort.
Never dip a dummy in anything sweet
One habit to avoid entirely is coating a dummy in honey, jam, or any sweet substance to settle a baby. This bathes the new teeth in sugar and is a direct path to early childhood tooth decay. Plain dummies only. The same principle applies to sweet drinks in a bottle.
When to see a dentist
If your child is past three and still strongly attached to the dummy, or you can already see a front-teeth gap or a jaw that shifts to one side when biting, it is worth a check. Early advice can prevent a small change from becoming an orthodontic problem. A first dental visit around the first birthday, covered in our first visit guide, is the easiest way to keep an eye on it.
Frequently asked questions
Are dummies bad for my baby's teeth?
Not in the early years. They are soothing and the effects on the bite only become a concern when the habit continues past about age three.
Will an open bite from a dummy fix itself?
Often yes, if the habit stops early enough. A mild open bite from dummy use frequently improves on its own once sucking stops before age three.
What age should my child give up the dummy?
Aim to wean between ages two and three. Stopping by three lowers the risk of lasting bite changes.
Is a dummy better than thumb sucking?
A dummy is usually easier to stop because you can remove it. Both can affect the bite if they continue into the preschool years.
Can I dip the dummy in something to help my baby settle?
No. Never use honey, jam, or sweet drinks on a dummy. It causes rapid decay in baby teeth. Use a plain dummy only.
The takeaway
Dummies are a normal, helpful comfort in the early years. The key is to phase them out between two and three so the bite can develop normally, and to keep them plain and never sweetened. If you have any concerns about your toddler's bite or weaning, our team at Lumi Dental is happy to help. See our offers page or read about teething and cleaning baby teeth.
This article is general information and not a substitute for an individual dental assessment.
