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Comparative Study
. 2014 Mar;84(2):274-8.
doi: 10.2319/040313-255.1. Epub 2013 Aug 7.

Influence of cone-beam computed tomography image artifacts on the determination of dental arch measurements

Thiago O Gamba  1 , Matheus L Oliveira, Isadora L Flores, Adriana D Cruz, Solange M Almeida, Francisco Haiter-Neto, Sérgio L P C Lopes
Affiliations
Comparative Study

Influence of cone-beam computed tomography image artifacts on the determination of dental arch measurements

Thiago O Gamba et al. Angle Orthod. 2014 Mar.

Abstract

Objective: To compare dental plaster model (DPM) and cone-beam computed tomography (CBCT) in the measurement of the dental arches, and investigate whether CBCT image artifacts compromise the reliability of such measurements.

Materials and methods: Twenty patients were divided into two groups based on the presence or absence of metallic restorations in the posterior teeth. Both dental arches of the patients were scanned with the CBCT unit i-CAT, and DPMs were obtained. Two examiners obtained eight arch measurements on the CBCT images and DPMs and repeated this procedure 15 days later. The arch measurements of each patient group were compared separately by the Wilcoxon rank sum (Mann-Whitney U) test, with a significance level of 5% (α = .05). Intraclass correlation measured the level of intraobserver agreement.

Results: Patients with healthy teeth showed no significant difference between all DPM and CBCT arch measurements (P > .05). Patients with metallic restoration showed significant difference between DPM and CBCT for the majority of the arch measurements (P > .05). The two examiners showed excellent intraobserver agreement for both measuring methods with intraclass correlation coefficient higher than 0.95.

Conclusion: CBCT provided the same accuracy as DPM in the measurement of the dental arches, and was negatively influenced by the presence of image artifacts.

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Figures

Figure 1.
Figure 1.
Mandibular measurements on a dental plaster model. (A) Intercanine distance. (B) Intermolar distance. (C) Second premolar mesiodistal distance, as part of the required space. (D) Orthodontic wire representing the arch perimeter.
Figure 2.
Figure 2.
Mandibular measurements on CBCT axial images. (A) Intercanine distance. (B) Intermolar distance. (C) Required space. (D) Dental arch perimeter.
See this image and copyright information in PMC

References

    1. Redlich M, Weinstock T, Abed Y, Schneor R, Holdstein Y, Fischer A. A new system for scanning, measuring and analyzing dental casts based on a 3D holographic sensor. Orthod Craniofac Res. 2008;11:90–95. - PubMed
    1. Wiranto MG, Engelbrecht WP, Tutein Nolthenius HE, van der Meer WJ, Ren Y. Validity, reliability, and reproducibility of linear measurements on digital models obtained from intraoral and cone-beam computed tomography scans of alginate impressions. Am J Orthod Dentofacial Orthop. 2013;143:140–147. - PubMed
    1. Oliveira ML, Tosoni GM, Lindsey DH, Mendoza K, Tetradis S, Mallya SM. Influence of anatomical location on CT numbers in cone beam computed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol. 2013;115:558–564. - PubMed
    1. Gracco A, Buranello M, Cozzani M, Siciliani G. Digital and plaster models: a comparison of measurements and times. Prog Orthod. 2007;8:252–259. - PubMed
    1. Mullen SR, Martin CA, Ngan P, Gladwin M. Accuracy of space analysis with emodels and plaster models. Am J Orthod Dentofacial Orthop. 2007;132:346–352. - PubMed

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