Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2019 May;48(4):20180319.
doi: 10.1259/dmfr.20180319. Epub 2018 Nov 8.

Dimensional accuracy of cone beam CT with varying angulation of the jaw to the X-ray beam

George K Koch  1   2 , Adam Hamilton  3 , Kelly Wang  4 , Laura Herschdorfer  4 , Kyu Ha Lee  5 , German O Gallucci  1 , Bernard Friedland  6
Affiliations

Dimensional accuracy of cone beam CT with varying angulation of the jaw to the X-ray beam

George K Koch et al. Dentomaxillofac Radiol. 2019 May.

Abstract

Objectives: Cone beam CT (CBCT) machines do not always allow for patients to be scanned in the ideal position for image acquisition. This study aimed to investigate the influence of the position/angulation of the mandible relative to the X-ray beam of a CBCT machine.

Methods: Five sequential CBCT scans were captured of a human mandible at each angulation of 10°, 20°, 30°, and 40° using a coronal and sagittal positioning. Inspection software utilized a best-fit alignment to automatically calculate the three-dimensional variation at 15 standardized points of interest.

Results: Statistically significant differences were found between the dimensional accuracy of CBCT scans taken at 10° (26.3 µm) of coronal angulation, as well as those taken at 20° (-17.3 mm) and 30° (35.2 mm) of sagittal angulations (p < 0.001, 0.016, and <0.001, respectively). The largest deviations in accuracy included an overall maximum deviation of 490 mm.

Conclusions: The position of the mandible with respect to the X-ray beam has a clinically insignificant effect on dimensional accuracy, up to the maximum angle of 40° assessed.

Keywords: cone beam CT; dimensional measurement accuracy; imaging; three-dimensional.

PubMed Disclaimer

Figures

Figure 1.
Figure 1.
Human mandible on radiolucent foam in CBCT machine.
Figure 2.
Figure 2.
Illustration of Mandible mounted at 0–40 degrees. Radiographs were captured in both the coronal and sagittal orientations.
Figure 3.
Figure 3.
Geomagic screenshot depicting dimensional differences between scans (mm).
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. Guerrero ME , Jacobs R , Loubele M , Schutyser F , Suetens P , van Steenberghe D . State-of-the-art on cone beam CT imaging for preoperative planning of implant placement . Clin Oral Investig 2006. ; 10 : 1 – 7 . doi: 10.1007/s00784-005-0031-2 - DOI - PubMed
    1. Jacobs R , Quirynen M . Dental cone beam computed tomography: justification for use in planning oral implant placement . Periodontol 2000 2014. ; 66 : 203 – 13 . doi: 10.1111/prd.12051 - DOI - PubMed
    1. Andersson J-E , Svartz K . CT-scanning in the preoperative planning of osseointegrated implants in the maxilla . Int J Oral Maxillofac Surg 1988. ; 17 : 33 – 5 . doi: 10.1016/S0901-5027(88)80226-1 - DOI - PubMed
    1. Arai Y , Tammisalo E , Iwai K , Hashimoto K , Shinoda K . Development of a compact computed tomographic apparatus for dental use . Dentomaxillofac Radiol 1999. ; 28 : 245 – 8 . doi: 10.1038/sj.dmfr.4600448 - DOI - PubMed
    1. Bornstein MM , Horner K , Jacobs R . Use of cone beam computed tomography in implant dentistry: current concepts, indications and limitations for clinical practice and research . Periodontol 2000 2017. ; 73 : 51 – 72 . doi: 10.1111/prd.12161 - DOI - PubMed