Tim George Ate Calon1, Martin Lars Johansson2,3, Elske Larissa van den Burg1, Anna Maria Louisa Janssen4, Marc van Hoof1, Robert Jan Stokroos1. 1. Department of Otorhinolaryngology, Head and Neck Surgery, Maastricht University Medical Center, Maastricht, Netherlands. 2. Oticon Medical AB, Askim, Sweden. 3. Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. 4. Department of Methodology and Statistics, Care and Public Health Research Institute, Maastricht University, Maastricht, Netherlands.
Abstract
OBJECTIVE: This study aimed to compare postoperative cone beam CT (CBCT) imaging to implant stability quotient (ISQ) 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. ISQ 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. ISQ 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, ISQ values for Ponto BCHIs relate to abutment length, insertion depth, and artificial bone density.
OBJECTIVE: This study aimed to compare postoperative cone beam CT (CBCT) imaging to implant stability quotient (ISQ) 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. ISQ 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. ISQ 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, ISQ values for Ponto BCHIs relate to abutment length, insertion depth, and artificial bone density.
Authors: Rik C Nelissen; Stina Wigren; Mark C Flynn; Gert J Meijer; Emmanuel A M Mylanus; Myrthe K S Hol Journal: Otol Neurotol Date: 2015-09 Impact factor: 2.311
Authors: Francisco J Manzano-Moreno; Francisco J Herrera-Briones; Tala Bassam; Manuel F Vallecillo-Capilla; Candela Reyes-Botella Journal: Implant Dent Date: 2015-10 Impact factor: 2.454
Authors: M L Johansson; R J Stokroos; R Banga; M K Hol; E A Mylanus; H Savage Jones; J R Tysome; P Vannucchi; J R Hof; J W Brunings; J van Tongeren; R W Lutgert; A Banerjee; J P Windfuhr; A Caruso; A L Giannuzzi; S Bordin; J Hanif; N Schart-Morén; S Singam; S Jonhede; M Holmberg; C W Cremers; M Hultcrantz Journal: Clin Otolaryngol Date: 2017-01-04 Impact factor: 2.597
Authors: Christine A den Besten; Arjan J Bosman; Rik C Nelissen; Emmanuel A M Mylanus; Myrthe K S Hol Journal: Otol Neurotol Date: 2016-06 Impact factor: 2.311