Tooth Movement Associated With CPAP Therapy.

We report on a rarely documented side effect-tooth movement-associated with positive airway pressure therapy. A 64-year-old woman presented to an orthodontic practice for evaluation of unexplained tooth movement and spaces opening between her anterior teeth. The patient recently received a diagnosis of mild obstructive sleep apnea, for which she had been using continuous positive airway pressure (CPAP) delivered by a nasal pillows interface for the past 18 months. Follow-up questioning revealed that shifting of the teeth was first noticed in the months following the initiation of CPAP and the result of forward thrusting of the tongue during use. Following 12 months of orthodontic treatment, the malocclusion was corrected and teeth returned to their pretreatment positions. Unwanted tooth movement, although a minor sequela, can have a meaningful effect on quality of life. With improved awareness of this issue, the patient experience and ultimately adherence with CPAP treatment can be improved.