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Treating Thumb Sucking Now Could Reduce Orthodontic Treatment Later

TreatingThumbSuckingNowCouldReduceOrthodonticTreatmentLater

One of the most common parental concerns is the habit of many children, even late into childhood, to suck their thumbs or fingers. Many parents have asked us, “Could this affect their teeth?”

The answer, unfortunately, is yes — thumb sucking can contribute to a malocclusion (bad bite) that could eventually require orthodontic treatment. Before making any assumptions, however, we need to understand the bigger picture.

To begin with, infants have a different swallowing mechanism than adults and older children. When you as an adult swallow, you'll notice the tip of your tongue positions itself just above the back of the top front teeth. An infant, however, will thrust their tongue between their upper and lower jaw as they swallow (also known as an infantile swallowing pattern or primary tongue thrust). The infant normally begins changing to an adult swallowing pattern when their primary (baby) teeth begin to erupt.

However, if a child's swallowing transition is slower than normal and the tongue rests between the jaws for a longer duration, it can inhibit the full eruption of teeth, believed to be the main cause of an open bite (a gap between the upper and lower teeth when the jaws are shut). The thumb during sucking resting between the teeth can have the same effect.

Thumb sucking may not necessarily lead to a malocclusion — for example, an abnormally developing jawbone could be the culprit. If prolonged thumb sucking does become a concern, however, there are steps we can take to reduce the impact of the habit. We can install a thin metal “tongue crib” behind the upper and lower incisors that will not only discourage thumb sucking, but also help retrain the tongue not to rest between the upper and lower teeth. There are also exercise routines known as orofacial myofunctional therapy (OMT) that can retrain specific muscles in the mouth to encourage more normal chewing and swallowing patterns.

These steps may not prevent future orthodontic treatment, but they could reduce its extent. The key is regular dental checkups and consultation to ensure your child's teeth and bite are developing normally.

If you would like more information on the effects of chronic thumb sucking on the mouth, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “How Thumb Sucking Affects the Bite.”

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