Short answer: Tongue thrust is when the tongue pushes between or behind the front teeth during swallowing or speaking. If it continues for a long time, it can contribute to an open bite. A tongue crib appliance (tongue guard) stops the tongue from reaching the teeth and helps to break the habit; it is often used together with tongue exercises.
Signs of tongue thrust
- A gap remaining between the front teeth when the teeth are closed
- The tongue being visible between the teeth when swallowing
- A lisp on “s” and “z” sounds
- Lips that close with tension and strain
For detailed information on open bite, see our page on open bite treatment.
How does a tongue crib work?
At the front of a fixed or removable appliance attached to the upper molars there are thin wire spurs or a barrier that stop the tongue pushing against the teeth. Over time the tongue gets used to a new resting and swallowing position behind this barrier.
Why are exercises important?
An appliance on its own does not always change the habit permanently. Myofunctional exercises that teach the correct tongue position can be carried out, together with a speech and language therapist if needed. Causes such as mouth breathing, enlarged tonsils and allergies should also be assessed.
How long is it worn?
- Usually a few months; improvement of the habit is monitored at check-ups
- It may need to be worn for a while after the habit has been broken
- Speaking and eating may be harder in the first days
For the link between mouth breathing and jaw development, read our article on the airway and orthodontics.
Frequently asked questions
Does tongue thrust go away on its own?
In young children it may lessen over time; if it continues in the permanent dentition, an assessment is recommended.
Does a tongue crib bother children?
There may be some difficulty with speaking and eating in the first days; most children get used to it within a few weeks.
Can tongue thrust be treated in adults?
Yes; tongue exercises and, if necessary, additional appliances can be planned alongside orthodontic treatment.
Which appliance is right for you?
Which appliance is needed is decided after age, growth stage and the condition of the teeth and jaws have been assessed by examination and X-rays. At our clinic in Oran, Çankaya, Ankara, we discuss the options with you during the first orthodontic examination. To see all types of appliance in one place, take a look at our guide to orthodontic appliances.
