Few habits are as associated with babies and young children as thumb-sucking and using pacifiers. These instinctive, entirely natural behaviours provide comfort, security, and relaxation during early childhood development.
However, many parents ask us how these self-soothing habits can impact their child’s oral health. In this blog, we discuss how thumb-sucking and pacifier use can affect your child’s teeth as they grow.
Why Babies and Children Suck Their Thumbs and Use Pacifiers
Sucking is one of the earliest natural reflexes, often starting before a child is even born. According to the Canadian Dental Association (CDA), it is completely normal for babies to suck because it helps them relax and settle.
Whether a child prefers a thumb or a soother, parents should view this behaviour not as a bad habit, but as a healthy sign of a child learning to soothe themselves.
When Thumb-Sucking and Pacifier Use Are Nothing to Worry About
In infancy and early childhood, thumb-sucking is generally harmless. Your child’s primary teeth are still emerging, and the pressure applied by short-term habits does not typically alter permanent dental structures.
The naturally occurring urge to suck tends to fade on its own, usually by two or three years of age when most toddlers gradually discover new ways to interact with their environment and express their feelings.
However, while short-lived or occasional sucking in these early years should not cause parents any concern, prolonging these habits can raise the risk of adverse effects on your child’s tooth development.
When a Prolonged Habit Can Start to Affect the Teeth and Bite
While early sucking is harmless, the duration, frequency, and intensity of the habit determine whether it might eventually influence tooth position and jaw alignment, especially if the behaviour continues as adult teeth begin to enter the mouth.
At Yonge Eglinton Dental, our team of children’s dental health experts looks for potential changes in your youngster’s oral development, such as:
- Open bite from thumb-sucking: A situation where the upper and lower front teeth do not touch even when the back teeth close together
- Overbite: The upper front teeth may be pushed gently forward or outward over time due to persistent pressure
- Narrowed dental arch: Sustained resting pressure against the roof of the mouth can subtly shape the palate and alter the overall bite development process
The mechanism behind these changes is subtle, as the repeated, continuous resting pressure of a thumb or soother against growing bone and tissue occurs over long periods.
Our Role in Monitoring Your Child’s Dental Development
As your family dental team, our goal is to monitor your child’s teeth, bite, and jaw development continuously during routine visits. Regular checkups allow us to assess how thumb-sucking affects baby teeth and emerging permanent teeth in a gentle, comfortable setting that focuses on your child’s needs.
During routine visits, we evaluate your child’s bite alignment, so we can catch small changes early and provide simple, supportive guidance. If alignment adjustments ever become beneficial as your child grows, we will discuss all available options and help you make an informed choice that best suits your family.
These regular visits also give you an opportunity to bring up any concerns about thumb-sucking or pacifier use, especially in cases where:
- The habit remains frequent and intense as permanent teeth begin to appear around age five or six
- You observe noticeable changes in how your child’s front teeth meet
- The habit involves forceful, vigorous sucking rather than passive resting
We can also offer personalized, gentle strategies to help your child let go of the habit while protecting their teeth during the transition, giving them every opportunity to enjoy a healthy, happy smile that will last a lifetime.
Learn More About Thumb-Sucking and Pacifiers from our Dentists at Yonge and Eglinton
Contact Yonge Eglinton Dental when you are ready to optimize your family’s oral health. We will work together to ensure your teeth and gums look great and are as strong and healthy as possible. Make an appointment today by calling 416-932-2222 or booking online. We look forward to seeing you!
Frequently Asked Questions About Thumb-Sucking and Pacifiers
Is thumb-sucking bad for my baby’s teeth?
No. In infants and toddlers, thumb-sucking is a natural self-soothing reflex that is generally harmless. Dentists pay closer attention if the habit continues after adult teeth begin to appear.
At what age should my child stop sucking their thumb or using a pacifier?
The natural urge to suck usually diminishes between two and three years of age. The Canadian Dental Association suggests helping your child ease out of the habit before permanent teeth arrive, around age five.
Is a pacifier better than thumb-sucking?
Neither habit is harmful in early infancy, but pacifiers offer greater parental control. You can limit pacifier access to sleep times or remove it gradually, whereas a thumb is always accessible to a child.
Can thumb-sucking really change my child’s teeth?
A prolonged and vigorous habit that persists as permanent teeth emerge can influence alignment. It may contribute to an open bite, overbite, or changes to the upper dental arch. These changes develop slowly and are monitored during regular checkups.
How can I help my child stop without making it stressful?
Focus on positive encouragement, praise, and comfort alternatives like a favourite plush toy. Avoid scolding or harsh pressure. Phasing pacifiers out gradually during sleep times can be very effective in stopping the habit.
When should I mention the habit to our dentist?
You are welcome to bring it up during any routine appointment. It is especially worth discussing if your child continues sucking vigorously near age five, or if you notice changes in their bite.
What if my child uses a pacifier only to fall asleep?
Occasional or bedtime-only soother use carries a much lower impact than constant, all-day sucking. You can discuss bedtime soother habits with your family dentist, who can help you plan a comfortable, gradual transition when the timing is right.
