TY - JOUR
T1 - The Use of cone Beam computed Tomography in Assessing the Insertion of Bone conduction hearing Implants
AU - Calon, Tim George Ate
AU - Johansson, Martin Lars
AU - van den Burg, Elske Larissa
AU - Janssen, Anna Maria Louisa
AU - van Hoof, Marc
AU - Stokroos, Robert Jan
PY - 2017/7/24
Y1 - 2017/7/24
N2 - 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.
AB - 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.
KW - bone-anchored hearing implants
KW - radiology
KW - BAHA
KW - Osstell
KW - implant stability
KW - resonance frequency analysis
KW - STABILITY
KW - SURGERY
KW - DEVICE
KW - TRIAL
KW - PUNCH
U2 - 10.3389/fsurg.2017.00038
DO - 10.3389/fsurg.2017.00038
M3 - Article
C2 - 28791294
SN - 2296-875X
VL - 4
JO - Frontiers in Surgery
JF - Frontiers in Surgery
M1 - 38
ER -