Bone Conduction

A bone anchored solution is an implanted device that works through direct bone conduction. Sound is conducted through the skull bone, bypassing the outer and middle ear and directly stimulating the cochlea. The device is composed of three parts: a titanium implant, an external abutment, and a detachable sound processor. Very little amplification is required as the conductive component is bypassed via direct bone conduction.

Indications for Bone Anchored Candidacy

  1. Conductive Hearing Loss
    • The conductive component of the hearing loss is greater than 30 dB.
  2. Mixed Hearing Loss
    • The conductive component of the hearing loss is greater than 30 d.
    • Mild to moderate sensorineural component to the hearing loss. The greater the air-bone gap, the more the candidate will benefit from the bone anchored device.
  3. Single-Sided Deafness (SSD)
    • Normal hearing in the good ear.
    • The head shadow effect is overcome leading to improved speech understanding and 360° sound awareness.

Non-Surgical Trial

The ability to try a bone anchored device prior to surgery to determine the potential benefit makes this system unique in comparison to other implantable hearing devices. The bone anchored system (BAS) can be tested by using a Softband or Testband, types of headbands that hold the processor tightly to the skull, making it possible to estimate the benefit of a BAS prior to surgical implantation. Children often notice the difference immediately during the trial period, which often happens during a single office visit. However, the trial can occur over a period of time outside the clinic, depending on the availability of loaner processors and the family's preference.