Dive Brief:
The U.S. Food and Drug Administration is evaluating concerns about the safety of unauthorized fixed palatal expanders that have been used to treat conditions including sleep apnea.
Palatal expanders are used to widen the roof of the mouth to make room for crowded teeth in children and adolescents. However, when the devices are used in adults, whose upper jaw bones are fused, it can result in tooth loss, bone erosion, and other serious co...