Bone Conduction Auditory Performance Via the Tooth for Single-Sided Deafness

This study has been completed.
Information provided by (Responsible Party):
Sonitus Medical Inc Identifier:
First received: September 14, 2009
Last updated: June 12, 2012
Last verified: June 2012

September 14, 2009
June 12, 2012
September 2009
February 2010   (final data collection date for primary outcome measure)
Effectiveness is defined as an improvement in speech intelligibility based on "Change from Baseline" analysis of a Hearing in Noise Test (HINT), Noise on Better Side Scores (HNBS) between without the BCD and with the BCD at day thirty. [ Time Frame: 30 days ] [ Designated as safety issue: No ]
Not Provided
Complete list of historical versions of study NCT00977314 on Archive Site
  • Incidence of device- and procedure-related adverse events at 30 days [ Time Frame: 30 days ] [ Designated as safety issue: Yes ]
  • Change in Abbreviated Profile of Hearing Aid Benefit (APHAB, Form A - New Format, Hearing Aid Research Lab, University of Memphis, 1994) to assess the subject's experience with the device [ Time Frame: 30 days ] [ Designated as safety issue: No ]
  • SSD Questionnaire score after 30 days to assess subject's experience with the device [ Time Frame: 30 Days ] [ Designated as safety issue: No ]
  • The Remaining conditions of the HINT (Speech front in Quiet, Speech front with noise from the front and Speech front with noise from worse ear side) [ Time Frame: 30 days ] [ Designated as safety issue: No ]
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Bone Conduction Auditory Performance Via the Tooth for Single-Sided Deafness
Bone Conduction Auditory Performance Via the Tooth for Single-Sided Deafness

The purpose of this study is to determine the safety and efficacy of using bone conduction via the teeth to treat Single-Sided Deafness (SSD).

The Sonitus Bone Conduction Device (BCD) is a bone conduction device for single-sided deafness (SSD). The Sonitus BCD consists of an Oral Appliance (OA), an external microphone component, worn behind the ear (BTE), a calibration interface cable and a PC-controlled calibration software for subject calibration. The Sonitus BCD picks up sounds from a microphone located within the ear canal of the deaf ear, capitalizing on the acoustics of the natural pinna and ear canal. The signal picked up by the microphone is then transmitted wirelessly to a removeable bone conduction oral appliance located on the upper molars. The oral appliance receives the acoustic signal from the BTE and applies an equivalent vibratory signal to the teeth that reaches the skull via bone conduction and routed transcranially to the contralateral cochlea.

Not Provided
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
  • Unilateral Hearing Loss
  • Single Sided Deafness
Device: The Sonitus Bone Conduction Hearing System
Comparison of HINT scores (Speech front with noise at better ear) at 30 days tested with the device in place verses with the device removed.
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
February 2010
February 2010   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • Must be >18, < 80 years old
  • Must be fluent in English, as determined by the PI
  • Must not be a member of a vulnerable group (IRB defined)
  • Must remain in geographic area during duration of the study
  • Diagnosis of acquired SSD (Section 3.1), time since onset (≥3 mos)
  • Must have a minimum of 6 posterior teeth remaining in the upper arch (3 teeth per side),third molars are acceptable if healthy, fully erupted and substituting for second molars

Exclusion Criteria:

  • Must not be current users of devices such as Baha, CROS or TransEar
  • Must not have known active medical causes of SSD:

    • Active middle ear pathology
    • Conductive HL (Otosclerosis, otitis media, otitis externa and others)
    • Sudden hearing loss that is not stable
  • Must not have known medical problems that might be life-threatening or is a contraindication for elective dental or medical procedures
  • Must not have known problems that may interfere with the impression procedure, such as inability to breath through nose (e.g. severe flu, allergies or cold)
  • Must not have allergies to polymers
  • Must not have known dental abnormalities:

    • Temporary crowns or undergoing dental treatment
    • Poor oral hygiene and/or rampant decay
    • Current orthodontics
    • Active caries in one or more of the possible abutment teeth for the device
    • Active moderate to severe periodontal disease around abutment teeth for the device
    • Suspicious oral/facial lesions or swelling of any type
    • Severe pain on palpation on any area of mouth, face or neck
    • Moderate to severe heat sensitivity on any of the upper teeth
    • Subject currently being treated for temporomandibular joint disorder (TMJ), pain, full mouth reconstruction or posterior dental implants
  • Must not have known Audiological conditions:

    • Conductive hearing loss (air-bone gap >10dB HL at more than 3 frequencies)
    • Word recognition scores inconsistent with pure tone averages
    • Fluctuating hearing loss
  • Must not have known psychological factors that interfere with their ability to comply, comprehend, consent and cooperate
18 Years to 80 Years
Contact information is only displayed when the study is recruiting subjects
United States
Sonitus Medical Inc
Sonitus Medical Inc
Not Provided
Principal Investigator: Michael Murray, MD
Sonitus Medical Inc
June 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP