Registration of digital dental models and cone-beam computed tomography images using 3-dimensional planning software: Comparison of the accuracy according to scanning methods and software

Background and Objectives: The aim of this paper is to describe the application of a newly developed three-dimensional imaging system, Cone-Beam Computed Tomography in the diagnosis and evaluation of supernumerary teeth.Material and Methods: One hundred and eighty-five patients with supernumerary teeth (134 males and 51 females) were included in this study. Patients ranged in age from 6 to 38 years. Supernumerary teeth were detected by clinical examination and conventional radiographs. Moreover, careful investigation for more details was made with the cone beam computed tomography. Supernumerary teeth which were detected with the examinations of the cone beam computed tomography images were analyzed according to the number, location, shape and position.Results: Males were affected more than females in a ratio of 2.6:1. 95 % supernumerary teeth were located in maxilla and 5 % in the mandible. 71.6% of supernumerary teeth were conical in shape. 93.6% supernumerary teeth were impacted and 6.4% were erupted. A total of 198 supernumerary teeth were found to be present in palatal/lingual side and 24 were found on the buccal side. 80.5 % of the patients had one, 18.9 % had two, and 0.5 % had three supernumeraries.Conclusion: Detailed examinations and evaluations of these teeth with Cone-Beam Computed tomography (CBCT) yields accurate 3-dimensional pictures of supernumerary teeth, local dental and bony structures which are very beneficial in terms of proper diagnosis and treatment planning and preventing complications which may occur. Janaki Medical College Journal of Medical Sciences (2017) Vol. 5(1): 5-15

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Integration accuracy of laser-scanned dental models into maxillofacial cone beam computed tomography images of different voxel sizes with different segmentation threshold settings

Oral Surgery Oral Medicine Oral Pathology and Oral Radiology ◽

10.1016/j.oooo.2014.02.022 ◽

2014 ◽

Vol 117 (6) ◽

pp. 780-786 ◽

Cited By ~ 16

Author(s):

Niansong Ye ◽

Hu Long ◽

Junjie Xue ◽

Sheng Wang ◽

Xin Yang ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Computed Tomography Images ◽

Dental Models ◽

Segmentation Threshold

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Reproducibility of landmark identification in the jaw and teeth on 3-dimensional cone-beam computed tomography images

The Angle Orthodontist ◽

10.2319/010711-5.1 ◽

2011 ◽

Vol 81 (5) ◽

pp. 843-849 ◽

Cited By ~ 22

Author(s):

Mariko Fuyamada ◽

Hiroyuki Nawa ◽

Momoko Shibata ◽

Kazuhito Yoshida ◽

Yoshitaka Kise ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Three Dimensional ◽

Cone Beam ◽

Volume Data ◽

3D Images ◽

3 Dimensional ◽

Computed Tomography Images ◽

Landmark Identification ◽

Significant Difference

Abstract Objective: To compare the reproducibility of landmark identification on three-dimensional (3D) cone-beam computed tomography (CBCT) images between procedures based on traditional cephalometric definitions (procedure 1) and those tentatively proposed for 3D images (procedure 2). Materials and Methods: A phantom with embedded dried human skull was scanned using CBCT. The acquired volume data were transferred to a personal computer, and 3D images were reconstructed. Eighteen dentists plotted nine landmarks related to the jaws and teeth four times: menton (Me), pogonion (Po), upper-1 (U1), lower-1 (L1), left upper-6 (U6), left lower-6 (L6), gonion (Go), condyle (Cd), and coronoid process (Cp). The plotting reliabilities of the two procedures were compared by calculating standard deviations (SDs) in three components (x, y, and z) of coordinates and volumes of 95% confidence ellipsoid. Results: All 27 SDs for procedure 2 were less than 1 mm, and only five of them exceeded 0.5 mm. The variations were significantly different between the two procedures, and the SDs of procedure 2 were smaller than those of procedure 1 in 21 components of coordinates. The ellipsoid volumes were also smaller for procedure 2 than procedure 1, although a significant difference was not found. Conclusions: Definitions determined strictly on each three sectional images, such as for procedure 2, were required for sufficient reliability in identifying the landmark related to the jaws and teeth.

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