Palate Expansion
Many people have an upper jaw (palate) that is narrower than it should be. This can happen when the jaw did not develop to its full natural width during childhood and adolescence, often due to softer modern diets, mouth breathing, or other factors that reduce the normal chewing forces that stimulate jaw growth.
A narrow palate has several consequences that are directly relevant to TMD and sleep-disordered breathing:
- A narrow upper jaw means a narrower nasal airway (the roof of the mouth is the floor of the nose), which can lead to mouth breathing and contribute to sleep apnea
- When the upper jaw is narrow, the tongue may not have adequate room to rest in its proper position against the roof of the mouth, which can push the lower jaw back and worsen airway issues
- Crowded teeth are a common result of insufficient jaw space
Palate expansion is a treatment that gradually widens the upper jaw using a removable appliance that applies gentle, consistent pressure across the palate.
Dr. Yolanda Cruz is a general dentist. Palate expansion is provided within the scope of general dentistry.
How it works:
A custom-fitted expansion appliance is worn in the mouth most of the time, ideally throughout the day, not just at night. The appliance contains a small expansion mechanism that is adjusted incrementally to apply light, steady widening forces to the upper jaw. Over a period of several months, the jaw gradually widens.
In adults, the process works differently than in children. Rather than separating the two halves of the upper jaw at their midline connection (which is what happens in children), adult palate expansion involves a gradual unfolding of the jaw bones. This is a slower process, but one that is achievable with the right appliance and adequate time.
What expansion can address:
- Widening the nasal airway, which may reduce mouth breathing
- Creating more space for the tongue to rest in the proper position against the roof of the mouth
- Providing additional space for crowded teeth
- Supporting a more forward jaw position, which is relevant to both TMD and sleep-disordered breathing
After expansion:
Once the desired width is achieved, the expansion must be retained. This involves wearing a retainer at night that keeps the jaw in its new position while the bone settles. The bite may also need some adjustment during and after the process, as widening the upper jaw changes how the upper and lower teeth fit together.
Palate expansion is often used in combination with other TMJ or sleep apnea treatments, particularly when airway size is a contributing factor.