Can Widening the Palate Help Childhood Bedwetting?

Bedwetting is usually treated as a bladder or behavioural issue. This systematic review investigated a more surprising link: whether rapid maxillary expansion — an orthodontic procedure that widens the upper jaw — could reduce night-time wetting in children. Two reviewers independently screened the literature across six databases to assess whether the connection holds up.

The logic behind the question is that a narrow palate sits directly beneath a narrow nasal airway. When that airway is compromised, sleep is fragmented and disordered breathing can follow — and disordered sleep is one of the recognised contributors to bedwetting. Widen the palate, open the airway, and the downstream symptom may ease.

This matters because it's a vivid example of the project's core idea: that the shape of the face has consequences far beyond teeth. A child wetting the bed is unlikely to be sent to an orthodontist, yet the structure of their jaw may be part of the story. Asking better questions across specialties is exactly how those hidden links get found.