The BONEBRIDGE active transcutaneous bone conduction implant: effects of location, lifts and screws on sound transmission
Abstract Background The BONEBRIDGE (MED-EL, Innsbruck, Austria) is a bone-conduction implant used in the treatment of conductive and mixed hearing loss. The BONEBRIDGE consists of an external audio processor and a bone-conduction floating mass transducer that is surgically implanted into the skull i...
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| Format: | Article |
| Language: | English |
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BMC
2020-08-01
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| Series: | Journal of Otolaryngology - Head and Neck Surgery |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s40463-020-00454-1 |
| _version_ | 1797971117192773632 |
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| author | Seyed Alireza Rohani Mandolin Li Bartling Hanif M. Ladak Sumit K. Agrawal |
| author_facet | Seyed Alireza Rohani Mandolin Li Bartling Hanif M. Ladak Sumit K. Agrawal |
| author_sort | Seyed Alireza Rohani |
| collection | DOAJ |
| description | Abstract Background The BONEBRIDGE (MED-EL, Innsbruck, Austria) is a bone-conduction implant used in the treatment of conductive and mixed hearing loss. The BONEBRIDGE consists of an external audio processor and a bone-conduction floating mass transducer that is surgically implanted into the skull in either the transmastoid, retrosigmoid or middle fossa regions. The manufacturer includes self-tapping screws to secure the transducer; however, self-drilling screws have also been used with success. In cases where the skull is not thick enough to house the transducer, lifts are available in a variety of sizes to elevate the transducer away from the skull. The objective of the present study was to investigate the effects of screw type, lift thickness, and implant location on the sound transmission of the BONEBRIDGE. Method Six cadaveric temporal bones were embalmed and dried for use in this study. In each sample, a hole was drilled in each of the three implant locations to house the implant transducer. At the middle fossa, six pairs of screw holes were pre-drilled; four pairs to be used with self-tapping screws and lifts (1, 2, 3, and 4 mm thick lifts, respectively), one pair with self-tapping screws and no lifts, and one pair with self-drilling screws and no lifts. At the transmastoid and retrosigmoid locations, one pair of screw holes were pre-drilled in each for the use of the self-tapping screws. The vibration of transmitted sound to the cochlea was measured using a laser Doppler vibrometry technique. The measurements were performed on the cochlear promontory at eight discrete frequencies (0.5, 0.75, 1, 1.5, 2, 3, 4 and 6 kHz). Vibration velocity of the cochlear wall was measured in all samples. Measurements were analyzed using a single-factor ANOVA to investigate the effect of each modification. Results No significant differences were found related to either screw type, lift thickness, or implant location. Conclusions This is the first known study to evaluate the effect of screw type, lift thickness, and implant location on the sound transmission produced by the BONEBRIDGE bone-conduction implant. Further studies may benefit from analysis using fresh cadaveric samples or in-vivo measurements. |
| first_indexed | 2024-04-11T03:27:35Z |
| format | Article |
| id | doaj.art-1178db0400ec4b05949c941f2ec3e517 |
| institution | Directory Open Access Journal |
| issn | 1916-0216 |
| language | English |
| last_indexed | 2024-04-11T03:27:35Z |
| publishDate | 2020-08-01 |
| publisher | BMC |
| record_format | Article |
| series | Journal of Otolaryngology - Head and Neck Surgery |
| spelling | doaj.art-1178db0400ec4b05949c941f2ec3e5172023-01-02T07:03:24ZengBMCJournal of Otolaryngology - Head and Neck Surgery1916-02162020-08-014911610.1186/s40463-020-00454-1The BONEBRIDGE active transcutaneous bone conduction implant: effects of location, lifts and screws on sound transmissionSeyed Alireza Rohani0Mandolin Li Bartling1Hanif M. Ladak2Sumit K. Agrawal3Department of Otolaryngology – Head and Neck Surgery, Western UniversitySchulich School of Medicine and Dentistry, Western UniversityDepartment of Otolaryngology – Head and Neck Surgery, Western UniversityDepartment of Otolaryngology – Head and Neck Surgery, Western UniversityAbstract Background The BONEBRIDGE (MED-EL, Innsbruck, Austria) is a bone-conduction implant used in the treatment of conductive and mixed hearing loss. The BONEBRIDGE consists of an external audio processor and a bone-conduction floating mass transducer that is surgically implanted into the skull in either the transmastoid, retrosigmoid or middle fossa regions. The manufacturer includes self-tapping screws to secure the transducer; however, self-drilling screws have also been used with success. In cases where the skull is not thick enough to house the transducer, lifts are available in a variety of sizes to elevate the transducer away from the skull. The objective of the present study was to investigate the effects of screw type, lift thickness, and implant location on the sound transmission of the BONEBRIDGE. Method Six cadaveric temporal bones were embalmed and dried for use in this study. In each sample, a hole was drilled in each of the three implant locations to house the implant transducer. At the middle fossa, six pairs of screw holes were pre-drilled; four pairs to be used with self-tapping screws and lifts (1, 2, 3, and 4 mm thick lifts, respectively), one pair with self-tapping screws and no lifts, and one pair with self-drilling screws and no lifts. At the transmastoid and retrosigmoid locations, one pair of screw holes were pre-drilled in each for the use of the self-tapping screws. The vibration of transmitted sound to the cochlea was measured using a laser Doppler vibrometry technique. The measurements were performed on the cochlear promontory at eight discrete frequencies (0.5, 0.75, 1, 1.5, 2, 3, 4 and 6 kHz). Vibration velocity of the cochlear wall was measured in all samples. Measurements were analyzed using a single-factor ANOVA to investigate the effect of each modification. Results No significant differences were found related to either screw type, lift thickness, or implant location. Conclusions This is the first known study to evaluate the effect of screw type, lift thickness, and implant location on the sound transmission produced by the BONEBRIDGE bone-conduction implant. Further studies may benefit from analysis using fresh cadaveric samples or in-vivo measurements.http://link.springer.com/article/10.1186/s40463-020-00454-1Bone conduction implantsBONEBRIDGELaser Doppler vibrometryConductive hearing lossMixed hearing lossMiddle fossa |
| spellingShingle | Seyed Alireza Rohani Mandolin Li Bartling Hanif M. Ladak Sumit K. Agrawal The BONEBRIDGE active transcutaneous bone conduction implant: effects of location, lifts and screws on sound transmission Journal of Otolaryngology - Head and Neck Surgery Bone conduction implants BONEBRIDGE Laser Doppler vibrometry Conductive hearing loss Mixed hearing loss Middle fossa |
| title | The BONEBRIDGE active transcutaneous bone conduction implant: effects of location, lifts and screws on sound transmission |
| title_full | The BONEBRIDGE active transcutaneous bone conduction implant: effects of location, lifts and screws on sound transmission |
| title_fullStr | The BONEBRIDGE active transcutaneous bone conduction implant: effects of location, lifts and screws on sound transmission |
| title_full_unstemmed | The BONEBRIDGE active transcutaneous bone conduction implant: effects of location, lifts and screws on sound transmission |
| title_short | The BONEBRIDGE active transcutaneous bone conduction implant: effects of location, lifts and screws on sound transmission |
| title_sort | bonebridge active transcutaneous bone conduction implant effects of location lifts and screws on sound transmission |
| topic | Bone conduction implants BONEBRIDGE Laser Doppler vibrometry Conductive hearing loss Mixed hearing loss Middle fossa |
| url | http://link.springer.com/article/10.1186/s40463-020-00454-1 |
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