Gallery A bone conduction hearing device worn behind the ear after being surgically implanted Child born with Microtia and Atresia wearing a bone conduction hearing device on a soft band head band. Child born with Microtia and Atresia, Medpor surgery and implanted with a bone anchored hearing aid. To make an appointment, e-mail us at: MicrotiaAtresiaClinic@VUMC.org or call ph: 615-343-6166.