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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.

Artikel i vetenskaplig tidskrift
Författare Hamidreza Taghavi
Bo Håkansson
Måns Eeg-Olofsson
Carina B. Johansson
Anders Tjellström
Sabine Reinfeldt
Tomas Bergqvist
Joakim Olsson
Publicerad i Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology
Volym 34
Nummer/häfte 4
Sidor 690-8
ISSN 1537-4505
Publiceringsår 2013
Publicerad vid Institutionen för odontologi
Institutionen för kliniska vetenskaper, Avdelningen för öron-, näs- och halssjukdomar
Sidor 690-8
Språk en
Länkar dx.doi.org/10.1097/MAO.0b013e318287...
Ämnesord Bone chips, Bone conduction implant, Flat surface contact, Mechanical point impedance, Osseointegration, Sheep skull, Vibration transmission
Ämneskategorier Oto-rino-laryngologi

Sammanfattning

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.

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