Palatal Expanders on Maui

A palatal expander is a custom appliance that fits across the roof of the mouth and gently widens the upper jaw over a few weeks, then holds the new width while the jaw stabilizes. In growing children, the two halves of the upper jaw have not fully fused, so the expander can guide them apart comfortably.

We use a sintered RPE (rapid palatal expander). It is precise and fits snugly without the spacers, or separators, that older expanders required, so there is one less step and less discomfort for your child. When a case also needs the back teeth moved, for example after an early baby tooth was lost or to help correct the bite, we use a Pendex appliance to gently distalize, or move back, those teeth and recover the space.

Timing is everything with expansion. The ideal window is roughly age 7 to 12, while the upper jaw is still growing. At that age the seam running down the middle of the upper jaw, called the maxillary suture, is still soft and has not fused, so a gentle expander can guide the two halves apart comfortably. Once that suture fuses in the mid-teens, a traditional expander no longer works on its own. That is one reason the American Association of Orthodontists recommends a first orthodontic visit by age 7, a great time to check whether the upper jaw has enough width.

The expander is activated in tiny increments, usually with a small key, which creates gentle pressure rather than pain. There may be mild pressure or a tingle after each turn, and a short adjustment period for talking and eating that most kids get past within days. After the active phase, the expander stays in for about six months so the jaw can stabilize in its new position, and braces often follow to align the teeth.