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The Use of cone Beam computed Tomography in Assessing the Insertion of Bone conduction hearing Implants

Artikel i vetenskaplig tidskrift
Författare T. G. A. Calon
Martin L Johansson
E. L. van den Burg
A. M. L. Janssen
M. van Hoof
R. J. Stokroos
Publicerad i Frontiers in Surgery
Volym 4
ISSN 2296-875X
Publiceringsår 2017
Publicerad vid Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap
Språk en
Länkar doi.org/10.3389/fsurg.2017.00038
Ämnesord bone-anchored hearing implants, radiology, BAHA, Osstell, implant stability, resonance frequency analysis, stability, surgery, device, trial, punch, Surgery
Ämneskategorier Biomaterialvetenskap

Sammanfattning

Objective: This study aimed to compare postoperative cone beam CT (CBCT) imaging to implant stability quotient (ISO) measurement and direct caliper measurements as a suitable technique to assess bone conduction hearing implant (BCHI) seating and insertion depth. Methods: in vitro, BCHIs were completely (n = 9) and partially inserted (n = 9) in bone blocks of different densities and subsequently scanned. Scans were processed using 3DSlicer 4.3.1 and Mathematica 10.3. ISO measurements were obtained for all BCHIs mounted with different abutment lengths (9, 12, and 14 mm). CBCT imaging was performed for patients with a clinical indication. Results: In vitro, 95% prediction intervals for partially inserted and completely inserted BCHIs were determined. ISO values significantly decreased with partial insertion, low -density artificial bone, and longer abutment lengths. Evaluation of in vitro and in vivo 3D models allowed for assessment of insertion depth and inclination. Conclusion: CBCT imaging allows to study implant seating and insertion depth after BCHI surgery. This can be useful when visual confirmation is limited. It is possible to distinguish a partial BCHI insertion from a complete insertion in artificial bone blocks. This technique could prove to be a valuable research tool. In vitro, ISO values for Ponto BCHIs relate to abutment length, insertion depth, and artificial bone density.

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