Reproducibility of three-dimensional cephalometric landmarks in cone-beam and low-dose computed tomography.

Clinical Oral Investigations
R OlszewskiH Reychler

Abstract

The purpose of this study is to compare the reproducibility of three-dimensional cephalometric landmarks on three-dimensional computed tomography (3D-CT) surface rendering using clinical protocols based on low-dose (35-mAs) spiral CT and cone-beam CT (I-CAT). The absorbed dose levels for radiosensitive organs in the maxillofacial region during exposure in both 3D-CT protocols were also assessed. The study population consisted of ten human dry skulls examined with low-dose CT and cone-beam CT. Two independent observers identified 24 cephalometric anatomic landmarks at 13 sites on the 3D-CT surface renderings using both protocols, with each observer repeating the identification 1 month later. A total of 1,920 imaging measurements were performed. Thermoluminescent dosimeters were placed at six sites around the thyroid gland, the submandibular glands, and the eyes in an Alderson phantom to measure the absorbed dose levels. When comparing low-dose CT and cone-beam CT protocols, the cone-beam CT protocol proved to be significantly more reproducible for four of the 13 anatomical sites. There was no significant difference between the protocols for the other nine anatomical sites. Both low-dose and cone-beam CT protocols were equivalent...Continue Reading

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Citations

Jul 20, 2014·Journal of Cranio-maxillo-facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery·T SmektałaR Olszewski
Dec 20, 2015·European Journal of Orthodontics·Pisha PittayapatRaphaël Olszewski
Jan 1, 2014·Orthodontics & Craniofacial Research·P PittayapatR Jacobs
Mar 21, 2015·Imaging Science in Dentistry·Pisha PittayapatRaphaël Olszewski
Jul 24, 2007·International Journal of Oral and Maxillofacial Surgery·M S M MuradinR Koole
Aug 5, 2008·Archives of Oral Biology·Edward F Harris, Richard N Smith
Dec 23, 2008·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Jeffrey W ChadwickErnest W N Lam
Jun 6, 2019·Journal of Applied Oral Science : Revista FOB·Marilia YatabeLucia Cevidanes
Nov 22, 2017·Brazilian Dental Journal·Helena Aguiar Ribeiro NascimentoDeborah Queiroz Freitas
Jul 29, 2019·Clinical Oral Investigations·Alexander JuerchottTim Hilgenfeld
Jan 7, 2021·The Journal of Craniofacial Surgery·Benson Wen Guang AngThiam Chye Lim

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