A cone-beam computed tomography triple scan procedure to obtain a three-dimensional augmented virtual skull model appropriate for orthognathic surgery planning
| Autor: | N. Neyt, F. Lippens, P. Lamoral, Johan Abeloos, Calix A.S. De Clercq, Jan Casselman, Filip Schutyser, Gwen R.J. Swennen, Wouter Mollemans |
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| Rok vydání: | 2009 |
| Předmět: |
Models
Anatomic medicine.medical_specialty Cone beam computed tomography Dental Impression Technique medicine.medical_treatment Orthognathic surgery Silicones Image processing Pilot Projects computer.software_genre Patient Care Planning Dental Occlusion Orthognathic Surgical Procedures User-Computer Interface Imaging Three-Dimensional Voxel Image Processing Computer-Assisted Medicine Humans business.industry Dental occlusion Dental Impression Materials Vertical Dimension General Medicine Centric Relation Cone-Beam Computed Tomography Surgery Impression Otorhinolaryngology Jaw Relation Record Evaluation of complex medical interventions [NCEBP 2] Dental impression material business Nuclear medicine computer Algorithms |
| Zdroj: | Journal of Craniofacial Surgery, 20, 2, pp. 297-307 Journal of Craniofacial Surgery, 20, 297-307 |
| ISSN: | 1049-2275 |
| Popis: | Item does not contain fulltext The aim of this study was to present a new approach to acquire a three-dimensional virtual skull model appropriate for orthognathic surgery planning without the use of plaster dental models and without deformation of the facial soft-tissue mask. A "triple" cone-beam computed tomography (CBCT) scan procedure with triple voxel-based rigid registration was evaluated and validated on 10 orthognathic patients. First, the patient was scanned vertically with a wax bite wafer in place (CBCT scan No1). Second, a limited dose scan of the patient with a Triple Tray AlgiNot impression in place was carried out (CBCT scan No2). Finally, a high-resolution scan of the Triple Tray AlgiNot impression was done (CBCT scan No3). Sequential and semiautomatic triple voxel-based rigid registration (RNo1-RNo3) was performed to augment the patient's skull model with accurate occlusal and intercuspidation data (Maxilim, version 2.1.1., Medicim NV, Mechelen, Belgium). All registrations were based on the Maximisation of Mutual Information registration algorithm. Because the accuracy and stability of the voxel-based registration (RNo1) between the Triple Tray AlgiNot impression scan and the limited low-dose patient scan were not known, this particular registration step needed to be validated. The accuracy of registration was measured on a synthetic skull and showed to be highly accurate. A volume overlap of 98.1% was found for registered impression scan No1. The mean distance between registered impression scan No1 and registered impression scan No2 was 0.08 +/- 0.03 mm (range, 0.04-0.11 mm). As far as the stability of registration was concerned, successful registration with a stable optimal position was obtained with a maximum variability of less than 0.1 mm. The results of this study showed that semiautomatic sequential triple voxel-based rigid registration of the triple CBCT scans augmented the 3-D virtual skull model with detailed occlusal and intercuspidation data in a highly accurate and robust way. The method is therefore appropriate and valid for 3-D virtual orthognathic surgery planning in the clinical routine. |
| Databáze: | OpenAIRE |
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