Validity of three-dimensional computed tomography measurements for Le Fort I osteotomy |
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| Institution: | 1. The Royal Melbourne Hospital, Grattan Street, Parkville, Victoria, Australia;2. Melbourne Dental School, Faculty of Medicine Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia;1. Craniofacial Center (CFC), Hirslanden Medical Center, Aarau, Switzerland;2. Department of Oral and Maxillofacial Surgery, Hannover Medical School, Hannover, Germany;3. Brainlab AG, Feldkirchen, Germany;4. Hirslanden Head Office, Zürich, Switzerland;5. Department of Radiotherapy, Hirslanden Medical Center, Aarau, Switzerland;6. Department of Pathology, Hirslanden Medical Center, Aarau, Switzerland;7. Philips AG, Zürich, Switzerland;1. Department of Oral and Maxillofacial Surgery, Hannover Medical School, Germany;2. Department of Small Cloven-Hoofed Animals, University of Veterinary Medicine Hannover, Germany;3. Department of Small Animals, University of Veterinary Medicine Hannover, Germany;4. Department of Traumatology and Regenerative Joint Surgery, Hannover Medical School, Germany;1. Memorial Sloan-Kettering Cancer Center, New York, NY;2. Brigham and Women''s Hospital, Boston, MA;3. University of Texas and MD Anderson Cancer Center, Houston, TX;4. New York University Medical Center, New York, NY;5. The University of Chicago, Chicago, IL;6. Penn Presbyterian Medical Center, Philadelphia, PA;7. University of Toronto, Toronto, ON, Canada;8. Cancer Research and Biostatistics, Seattle, WA;1. Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York;2. Department of Radiology, Brigham and Women’s Hospital, Boston, Massachusetts;3. Cancer Research and Biostatistics, Seattle, Washington;4. Department of Radiology, New York University School of Medicine, New York, New York;5. Department of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas;6. Department of Surgery, New York University School of Medicine and Comprehensive Cancer Center, New York, New York;7. Department of Medicine, The University of Chicago, Chicago, Illinois;8. Department of Surgery, Toronto General Hospital and Princess Margaret Hospital, Toronto, Ontario, Canada;9. Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania |
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| Abstract: | The purpose of this study was to test the precision and accuracy of three-dimensional (3D) linear measurements for Le Fort I osteotomy, obtained from multi-slice computed tomography (MSCT) and cone beam computed tomography (CBCT) scans. The study population consisted of 11 dried skulls submitted to 64-row MSCT and CBCT scans. Three-dimensional reconstructed images (3D-CT) were generated, and linear measurements (n = 11) based on anatomical structures and landmarks of interest for Le Fort I osteotomy were performed independently by two oral and maxillofacial radiologists, twice each, using Vitrea software; this allows true 3D measurement on 3D-CT images. The results demonstrated no statistically significant differences between the inter-examiner and intra-examiner analyses, and physical and true 3D linear measurements using MSCT and CBCT images. Regarding examiner accuracy, no statistically significant differences were found for the comparisons among the physical and the MSCT and the CBCT linear measurements by either examiner. For examiners 1 and 2, the analysis intra-examiner correlation coefficient ranged from 0.87 to 0.96 and 0.82 to 0.98, respectively, using MSCT, and from 0.84 to 0.98 and 0.80 to 0.98, respectively, using CBCT, indicating almost perfect agreement for all analyses performed. 3D linear measurements obtained from MSCT and CBCT images were considered precise and accurate for Le Fort I osteotomy and thus accurate and helpful for Le Fort I osteotomy planning. |
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| Keywords: | three-dimensional computed tomography orthognathic surgery |
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