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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/26373

Title: Influence of basis images and skull position on evaluation of cortical bone thickness in cone beam computed tomography
Authors: Chagas Nascimento, Monikelly do Carmo
de Almeida Boscolo, Solange Maria
Haiter-Neto, Francisco
Dos Santos, Emanuela Carla
Lambrichts, Ivo
Pauwels, Ruben
Jacobs, Reinhilde
Issue Date: 2017
Abstract: Objectives. The aim of this study was to assess the influence of the number of basis images and the orientation of the skull on the evaluation of cortical alveolar bone in cone beam computed tomography (CBCT). Study Design. Eleven skulls with a total of 59 anterior teeth were selected. CBCT images were acquired by using 4 protocols, by varying the rotation of the tube-detector arm and the orientation of the skull (protocol 1: 360(omicron)/0(omicron); protocol 2: 180(omicron)/0(omicron); protocol 3: 180(omicron)/90(omicron); protocol 4: 180(omicron)/180(omicron)). Observers evaluated cortical bone as absent, thin, or thick. Direct observation of the skulls was used as the gold standard. Intra- and interobserver agreement, as well as agreement of scoring between the 3 bone thickness classifications, were calculated by using the k statistic. The Wilcoxon signed-rank test was used to compare the 4 protocols. Results. For lingual cortical bone, protocol 1 showed no statistical difference from the gold standard. Higher reliability was found in protocol 3 for absent (k = 0.80) and thin (k = 0.47) cortices, whereas for thick cortical bone, protocol 2 was more consistent (k - 0.60). In buccal cortical bone, protocol 1 obtained the highest agreement for absent cortices (k - 0.61), whereas protocol 4 was better for thin cortical plates (k = 0.38) and protocol 2 for thick cortical plates (k = 0.40). Conclusions. No consistent effect of the number of basis images or head orientation for visual detection of alveolar bone was detected, except for lingual cortical bone, for which full rotation scanning showed improved visualization.
Notes: [Chagas Nascimento, Monikelly do Carmo; de Almeida Boscolo, Solange Maria; Haiter-Neto, Francisco] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Oral Diag, Sao Paulo, Brazil. [Dos Santos, Emanuela Carla] Pontificia Univ Catolica Parana, Curitiba, Parana, Brazil. [Lambrichts, Ivo] Biomed Res Inst, Lab Morphol, Hasselt, Belgium. [Pauwels, Ruben; Jacobs, Reinhilde] Univ Leuven, Dept Imaging & Pathol, OMFS IMPATH Res Grp, Leuven, Belgium. [Pauwels, Ruben; Jacobs, Reinhilde] Univ Hosp Leuven, Oral & Maxillofacial Surg, Leuven, Belgium. [Pauwels, Ruben] Chulalongkorn Univ, Fac Dent, Dept Radiol, Bangkok, Thailand. [Jacobs, Reinhilde] Karolinska Inst, Dept Dent Med, Stockholm, Sweden.
URI: http://hdl.handle.net/1942/26373
DOI: 10.1016/j.oooo.2017.01.015
ISI #: 000401433000015
ISSN: 2212-4403
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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