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Evaluation of bone tissue formation in a flat surface attachment of a Bone Conduction Implant - A pilot study in a sheep model

Måns Eeg-Olofsson ; Agneta Lith ; Bo Håkansson (Institutionen för signaler och system, Medicinska signaler och system) ; Sabine Reinfeldt (Institutionen för signaler och system, Medicinska signaler och system) ; Hamidreza Taghavi (Institutionen för signaler och system, Medicinska signaler och system) ; Karl-Johan Fredén Jansson (Institutionen för signaler och system) ; Carina B. Johansson
Audiology & Neurotology Extra (1664-5537). Vol. 4 (2014), 3, p. 62-76.
[Artikel, refereegranskad vetenskaplig]

The Bone Conduction Implant (BCI) is a new bone conduction hearing device implanted under intact skin. The transducer has a flat direct contact to the mastoid part of the temporal bone and no screws are used. The sound signal is transmitted from the external audio processor to the implant by means of magnetic induction. In this study, osseointegration of a flat passive BCI transducer dummy in sheep skulls was assessed using quantitative and qualitative histology as well as Cone Beam Computed Tomography (CBCT) and Computed Tomography (CT). The histology results were also related to the mechanical properties of the bone to implant interface. Eight months after the surgical implantation, histology sections of the bone close to the implant showed bone remodelling, compact bone and some degree of osseointegration. The histological findings corresponded well to the mechanical measurements indicating stiffer bone close to the implant, and unaffected skull vibration transmission. Neither CBCT nor CT had enough resolution to visualize the bone to implant interface in detail. In this study, using an animal model, it is shown that a flat implant in contact with bone, can be a feasible method for efficient vibration transmission to the skull bone.

Nyckelord: Bone Conduction, Implantable bone conduction hearing devices, Bone Conduction Implant, Osseointegration, Histomorphometry, Cone Beam Computed Tomography



Denna post skapades 2015-01-05. Senast ändrad 2016-10-28.
CPL Pubid: 209487

 

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Institutioner (Chalmers)

Institutionen för kliniska vetenskaper, sektionen för anestesi, biomaterial och ortopedi, Avdelningen för öron-, näs- och halssjukdomar (GU)
Institutionen för odontologi, sektion 1 (GU)
Institutionen för signaler och system, Medicinska signaler och system
Institutionen för signaler och system
Institutionen för odontologi, sektion 2 (GU)

Ämnesområden

Histologi
Diagnostisk radiologi
Audiologi
Biomaterialvetenskap

Chalmers infrastruktur