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A vibration investigation of a flat surface contact to skull bone for direct bone conduction transmission in sheep skulls in vivo.

Hamidreza Taghavi (Institutionen för signaler och system, Medicinska signaler och system) ; Bo Håkansson (Institutionen för signaler och system, Medicinska signaler och system) ; Måns Eeg-Olofsson ; Carina B. Johansson ; Anders Tjellström ; Sabine Reinfeldt (Institutionen för signaler och system, Medicinska signaler och system) ; Tomas Bergqvist (Institutionen för signaler och system, Medicinska signaler och system) ; Joakim Olsson (Institutionen för signaler och system, Medicinska signaler och system)
Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology (1537-4505). Vol. 34 (2013), 4, p. 690-8.
[Artikel, refereegranskad vetenskaplig]

Hypothesis: Bone conduction implant (BCI) attached with a flat surface contact will offer efficient and linear vibration transmission over time. Background: Despite that percutaneous bone conduction devices (PBCD) are successful in treating patients with conductive hearing loss, there are some drawbacks related to the need of a permanent skin penetration. The BCI system is designed as an alternative to the PBCD because it leaves the skin intact. Methods: BCI dummy implants were installed in 3 sheep skulls in vivo to study the vibration transmission characteristics over time. Mechanical point impedances and vibration transfer response functions of the BCI implants were measured at the time of surgery and after a healing period of 8 months. Results: In 1 sheep both implants healed without complications. In the other 2 sheep, the implants were either partially loose or lost to follow up. In the sheep with stable implants, it was found by the resonance frequency shift of the mechanical point impedance that a firmer integration between the implant and bone tissue as seen in osseointegrated surfaces developed over time. It was also shown that the transcranial vibration transmission remains stable and linear. Providing bone chips in the contact between the implant and the bone did not enhance vibration transmission. The surgical procedure for installing the BCI dummy implants was uneventful. Conclusion: The mechanical point impedances and vibration transfer response functions indicate that the BCI implants integrate and that transmission conditions remain stable over time.

Nyckelord: Bone chips, Bone conduction implant, Flat surface contact, Mechanical point impedance, Osseointegration, Sheep skull, Vibration transmission



Denna post skapades 2013-05-15. Senast ändrad 2015-07-28.
CPL Pubid: 176937

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Medicinska signaler och system (2005-2017)
Institutionen för kliniska vetenskaper, sektionen för anestesi, biomaterial och ortopedi, Avdelningen för öron-, näs- och halssjukdomar (GU)
Institutionen för odontologi (GU)

Ämnesområden

Oto-rino-laryngologi

Chalmers infrastruktur