07/26/2026
Pacifier shapes and uses explained so well by LA Lactation!!
Walk into any baby store and you’ll find an entire wall of pacifiers.
Round. Orthodontic. Flat. Symmetrical. Cherry. “Breast-like”. Glow in the dark. Silicone. Natural rubber.
The packaging often promises the “best” shape for oral development. Which can make picking one so challenging.
As a SLP/IBCLC, I don’t believe there’s one perfect pacifier for every baby. The shape matters less than how, when, and how long it’s used.
🍼 First, let’s remember what breastfeeding actually looks like. During breastfeeding, we want to see the tongue create a deep cupped shape around the ni**le and areolar tissue. The sides of the tongue lift up around the ni**le while the middle of the tongue forms a groove that helps hold the breast securely. Gentle wave-like movements from front to back help remove milk while the jaw opens widely and rhythmically. A breast isn’t held in the mouth by suction alone. It’s an incredibly coordinated movement involving the tongue, jaw, lips, cheeks, palate, and nervous system. That beautiful cupping pattern is what we often work to encourage in babies who struggle with latch.
💤 Sleep is a little different. When babies are resting and not actively feeding, we want the tongue to relax up against the roof of the mouth. The tongue resting against the palate supports healthy nasal breathing and normal development of the upper jaw.
So feeding and resting actually involve two different tongue postures. One requires active cupping and peristaltic movement. The other is quiet, relaxed elevation of the tongue.
🍼 So what about pacifier shapes?
The three most common designs are:
• Round (Cherry)
The round shape (think Philips Avent Soothie, Dr Browns Happy Paci, Ninni co, Momi, Nanobebe) allows the tongue to cup around it. I often like these when we’re working on suck training because they encourage babies to organize a more rounded tongue shape. Some babies who struggle with tongue coordination respond beautifully to them. They are not all created equal and some are better than others at promoting the wide, deep latch of the breast
• Orthodontic
Usually flattened on the bottom with a rounded top. (Nuk, Ryan&Rose, Chicco all have these shapes) The idea is to reduce pressure on developing teeth and encourage the tongue upward against the palate.
• Flat
The Mam is the most common flat pacifier, but other brands like Dr Browns Advantage, Cutie Pat, etc also have them. Because the tongue doesn’t have to cup they can be easier for some babies to keep them on their mouth. I’ve also seen babies who gag easily on the round pacifiers tolerate these better for soothing. Some babies strongly prefer these while others simply won’t keep them in.
Every baby is different. Some babies immediately spit out every round pacifier but happily soothe with a flat one. Others gag easily on longer pacifiers but can do ok when it’s shorter. Some won’t take any pacifier at all. Some take anything you put in their mouth. We have to look at the unique baby to determine which pacifier could be a good option for them based on why we are using it.
There is currently no strong evidence that one pacifier shape is universally superior for every baby’s oral development. In fact, the American Academy of Pediatric Dentistry has specifically called for more research comparing pacifier designs because the evidence simply isn’t definitive yet.
🦷 What the research does show is something different. The biggest concern isn’t usually the shape. Its duration, intensity, and frequency.
A baby who sucks vigorously on any pacifier for hours every day over many months places repeated pressure on developing teeth, the palate, and the growing jaws. That prolonged force (not simply the silicone shape itself) is what has been associated with changes such as anterior open bite, posterior crossbite, and narrowing of the upper arch. The longer the habit continues, particularly beyond toddlerhood, the greater the likelihood of these changes.
Every baby’s oral anatomy is also unique. A baby with a naturally high palate, strong suck, oral tension, tongue restriction, low muscle tone, or different jaw growth may respond differently to the exact same pacifier.
That’s one reason I hesitate when lactation consultants recommend one shape as “the best for breast.”
Human development simply isn’t one-size-fits-all.
❤️ How I recommend using pacifiers
I think pacifiers are wonderful tools. Tools. Every tool has a specific job for a specific reason.
• Helping babies settle in the car.
• Transitioning to sleep during naps and bedtime.
• During “rest and digest” time when babies simply need comfort.
• During medical procedures.
• For some babies, supporting organized non-nutritive sucking to support sucking during feeds.
I don’t recommend using a pacifier to stretch feeds or convince a hungry baby to wait longer to eat. Hunger should always come first. And once the pacifier has done its job? Take it out. If your baby falls asleep and it gently falls from their mouth, you don’t need to keep replacing it throughout the nap. In fact, the AAP advises that if it falls out after the baby is asleep, there’s no need to put it back. The pacifier’s job is to help the baby soothe, not continuous suck all day long.
🗓️ When should you wean?
There isn’t one magical birthday. However, here’s what many pediatric and dental organizations recommend:
• Around 6–12 months, begin gradually limiting pacifier use to sleep and comforting situations.
• By 2 to 3 years, most children should be completely weaned to minimize the risk of lasting dental changes. The AAP recommends dental evaluation if non-nutritive sucking continues beyond age 3, while the AAPD encourages discontinuing pacifier habits by 36 months.
✨ My approach?
If I’m doing suck training or helping improve tongue organization, I often reach for a round pacifier because I like how it allows the tongue to cup around it. The Ninni Co, Dr Brown’s Happy Paci and Avent Soothie all have a place with different babies for working on different oral motor skills
If we’re simply using a pacifier occasionally for soothing or sleep? I’m much less concerned about whether it’s round, orthodontic, or flat. I’d rather choose the one your baby actually accepts, use it thoughtfully, and avoid having it in their mouth all day.
Because in the end, healthy oral development isn’t determined by one piece of silicone. It’s shaped by feeding, breathing, muscle function, genetics, growth, and the countless little experiences that help a baby’s mouth develop over time.
Pacifiers can absolutely have a place in that journey,
they just work best when they’re used intentionally, not constantly.
I’m curious… did your baby have a strong preference for one pacifier shape, or refuse them all?
Schmid KM, Kugler R, Nalabothu P, Bosch C, Verna C. The effect of pacifier sucking on orofacial structures: a systematic literature review. Prog Orthod. 2018 Mar 13;19(1):8. doi: 10.1186/s40510-018-0206-4. PMID: 29532184; PMCID: PMC5847634.