The best pacifier for teeth is one with an orthodontic nipple, the right size for your baby’s mouth, and a design that minimizes pressure on the developing palate. No pacifier is completely harmless to dental development, but certain features reduce the risk significantly. Just as important as the pacifier you choose is when you take it away: the American Academy of Pediatric Dentistry recommends stopping pacifier use by age 3, and ideally beginning to wean before 18 months.
How Pacifiers Affect Developing Teeth
When a baby sucks on a pacifier, it creates negative pressure inside the mouth and pushes the tongue down and away from the roof of the mouth. Normally, the tongue rests against the palate and acts as a natural mold, encouraging it to widen as the baby grows. A pacifier disrupts that process. The result, over time, is a narrower palate and changes to how the teeth line up.
The three most common dental problems linked to pacifier use are anterior open bite (a gap between the top and bottom front teeth when the mouth is closed), posterior crossbite (where the upper back teeth sit inside the lower back teeth instead of outside them), and increased overjet (where the top front teeth jut forward). In systematic reviews, 15 out of 17 studies found a strong link between pacifier use and open bite. The prevalence of posterior crossbite in children who used pacifiers ranged from about 13% to as high as 89% across different studies.
The good news: if the pacifier is stopped before age 3, an open bite will often correct itself as the jaw continues to grow. After age 3, the changes become harder to reverse on their own.
What Makes an Orthodontic Pacifier Different
Traditional pacifiers have a round, bulb-shaped nipple that’s symmetrical in every direction. Orthodontic pacifiers have a nipple that’s flat on the bottom and rounded on the top, mimicking the shape of the mother’s nipple during breastfeeding. This design is intended to distribute pressure more evenly across the palate rather than concentrating it in one spot.
That said, researchers have noted that new nipple shapes and textures are still needed to better counteract the palatal narrowing that pacifiers cause. Orthodontic designs are the best current option, but they don’t eliminate the risk entirely. Think of them as harm reduction, not prevention.
Why Sizing Matters More Than You’d Think
Most pacifiers are labeled by age range (0 to 6 months, 6 to 18 months, and so on), but engineering research has shown that many dental problems from pacifier use are actually caused by improper sizing, not just nipple shape. Chronological age is not a reliable size metric because babies’ mouths vary considerably at any given age. Across brands, the size recommendations are inconsistent, and the default tendency is to undersize.
An undersized pacifier is a real problem. When the nipple bulb is too small for the palate, it can cause palatal collapse, airway narrowing, and orthodontic changes that last well beyond the pacifier years. A properly sized nipple should fill the palate enough to avoid collapsing it inward without being so large that it strains the jaw.
If your baby seems to be between sizes or the pacifier looks small relative to their mouth, sizing up is generally the safer bet. Pay attention to how the pacifier sits: the nipple should rest comfortably against the palate without the baby having to strain or compress their lips tightly around it.
Shield Design and Jaw Growth
The shield (the flat or curved piece that sits against your baby’s face) matters more than most parents realize. Shields with a vertically flat contour that press tightly against the lips can actually restrict the jaw’s forward growth. During sucking, a tight shield creates a “suck-back” effect, trapping the lower jaw and preventing normal movement. Look for shields with a gently curved or contoured shape that allows some space between the shield and the face. Ventilation holes in the shield also help reduce moisture buildup and skin irritation around the mouth.
Silicone vs. Latex
Pacifier nipples come in two materials, and the choice affects hygiene and durability more than dental outcomes directly.
- Silicone is firmer, more durable, and easy to sterilize by boiling. It’s hypoallergenic and resists bacterial buildup. For most families, silicone is the more practical choice.
- Latex is softer and more flexible, which some babies prefer. But it can’t withstand high-temperature sterilization, wears out faster, and can trigger allergic reactions in babies with latex sensitivities.
If your baby has no latex allergy and strongly prefers the softer feel, latex is fine, but plan to replace it more often. Inspect it regularly for tears or stickiness, which signal it’s time for a new one.
Key Features to Look For
- Orthodontic nipple shape: flat on the bottom, rounded on top.
- Appropriate size for your baby’s mouth: don’t rely solely on age labels. Compare across brands and size up if in doubt.
- Curved, non-restrictive shield: avoid flat shields that press tightly against the lips and restrict jaw movement.
- Ventilation holes: reduces drool-related irritation and allows airflow.
- One-piece construction: eliminates choking risk from parts separating.
When to Wean Off the Pacifier
The American Academy of Pediatric Dentistry recommends eliminating pacifier use by 36 months. But the risks to dental and facial development begin earlier than most parents expect. After 18 months, pacifier use starts to influence the shape of the developing jaw, palate, and tooth alignment. After 12 months, it also increases the risk of ear infections.
Children who used a pacifier beyond 36 months had significantly higher rates of open bite compared to non-users. The clearest takeaway from the research: the earlier you can wean, the better the chance that any bite changes will self-correct. If your child still uses a pacifier at age 2, start actively working toward stopping. If the bite has already shifted by age 3, the odds of natural correction are still in your favor, but they drop substantially with each additional year of use.
Limiting pacifier use to naps and bedtime (rather than all-day use) during the weaning process reduces total daily exposure and gives the palate more time in its natural position, which can slow or reduce dental effects even before you eliminate the pacifier entirely.