R Patcas1, G Markic, L Müller, O Ullrich, T Peltomäki, C J Kellenberger, C A Karlo. 1. Clinic for Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, and Department of Diagnostic Imaging, University Children's Hospital Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland. raphael.patcas@zzm.uzh.ch
Abstract
OBJECTIVES: The aim was to compare the accuracy of linear bone measurements of cone beam CT (CBCT) with multidetector CT (MDCT) and validate intraoral soft-tissue measurements in CBCT. METHODS: Comparable views of CBCT and MDCT were obtained from eight intact cadaveric heads. The anatomical positions of the gingival margin and the buccal alveolar bone ridge were determined. Image measurements (CBCT/MDCT) were performed upon multiplanar reformatted data sets and compared with the anatomical measurements; the number of non-assessable sites (NASs) was evaluated. RESULTS: Radiological measurements were accurate with a mean difference from anatomical measurements of 0.14 mm (CBCT) and 0.23 mm (MDCT). These differences were statistically not significant, but the limits of agreement for bone measurements were broader in MDCT (-1.35 mm; 1.82 mm) than in CBCT (-0.93 mm; 1.21 mm). The limits of agreement for soft-tissue measurements in CBCT were smaller (-0.77 mm; 1.07 mm), indicating a slightly higher accuracy. More NASs occurred in MDCT (14.5%) than in CBCT (8.3%). CONCLUSIONS: CBCT is slightly more reliable for linear measurements than MDCT and less affected by metal artefacts. CBCT accuracy of linear intraoral soft-tissue measurements is similar to the accuracy of bone measurements.
OBJECTIVES: The aim was to compare the accuracy of linear bone measurements of cone beam CT (CBCT) with multidetector CT (MDCT) and validate intraoral soft-tissue measurements in CBCT. METHODS: Comparable views of CBCT and MDCT were obtained from eight intact cadaveric heads. The anatomical positions of the gingival margin and the buccal alveolar bone ridge were determined. Image measurements (CBCT/MDCT) were performed upon multiplanar reformatted data sets and compared with the anatomical measurements; the number of non-assessable sites (NASs) was evaluated. RESULTS: Radiological measurements were accurate with a mean difference from anatomical measurements of 0.14 mm (CBCT) and 0.23 mm (MDCT). These differences were statistically not significant, but the limits of agreement for bone measurements were broader in MDCT (-1.35 mm; 1.82 mm) than in CBCT (-0.93 mm; 1.21 mm). The limits of agreement for soft-tissue measurements in CBCT were smaller (-0.77 mm; 1.07 mm), indicating a slightly higher accuracy. More NASs occurred in MDCT (14.5%) than in CBCT (8.3%). CONCLUSIONS: CBCT is slightly more reliable for linear measurements than MDCT and less affected by metal artefacts. CBCT accuracy of linear intraoral soft-tissue measurements is similar to the accuracy of bone measurements.
Authors: N Ibrahim; A Parsa; B Hassan; P van der Stelt; I H A Aartman; D Wismeijer Journal: Dentomaxillofac Radiol Date: 2013-10-16 Impact factor: 2.419
Authors: Ehab A Abdulghani; Maged Sultan Alhammadi; Abeer A Al-Sosowa; Abeer A Almashraqi; Hasan M Sharhan; Hanan Al-Fakeh; BaoCheng Cao Journal: Clin Oral Investig Date: 2022-03-20 Impact factor: 3.606
Authors: Liliane Rosas Gomes; Marcelo Regis Gomes; João Roberto Gonçalves; Antônio Carlos O Ruellas; Larry M Wolford; Beatriz Paniagua; Erika Benavides; Lúcia Helena Soares Cevidanes Journal: Oral Surg Oral Med Oral Pathol Oral Radiol Date: 2015-10-20