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. 2015:2015:808625.
doi: 10.1155/2015/808625. Epub 2015 Oct 22.

Availability of Software-Based Correction of Mandibular Plane for the Vertical Measurement of the Mandible in Cone Beam Computed Tomography

Sang-Sun Han  1 , Kwang-Min Lee  2 , Kee-Deog Kim  2
Affiliations

Availability of Software-Based Correction of Mandibular Plane for the Vertical Measurement of the Mandible in Cone Beam Computed Tomography

Sang-Sun Han et al. Biomed Res Int. 2015.

Abstract

Objectives: To investigate the availability of correction of mandibular plane using software for vertical measurements in cone beam computed tomography (CBCT) according to the sites of the mandible.

Methods: CBCT scans of six dry mandibles were performed at 0-, 5-, 10-, 15-, and 20-degree angles relative to CBCT scanning table. Using the imaging software, mandibular planes of the different angles were corrected to that of 0-degree angle on the CBCT images. Before and after correction of the mandibular planes, the distance from the mandibular canal to the alveolar crest was measured at M1, M2, and M3 areas of the mandible and vertical measurements were statistically compared with those of 0-angle location using the paired t-test.

Results: Prior to correction, the vertical measurements increased as the angle increased. The greatest differences of measurements were observed in M3 areas (P < 0.05). After correction, a strong correlation was found in measurements between the 0-degree angle and the other angles in all sites of the mandible (P > 0.05).

Conclusions: The vertical measurements of CBCT were significantly influenced by mandibular positioning. When CBCT scans are performed at angles other than 0-degree angle, software-based correction of the mandibular plane can be a reliable tool for the accurate vertical measurements in CBCT.

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Figures

Figure 1
Figure 1
Marked sites of the mandible for the measurements.
Figure 2
Figure 2
Measurement of the distance (V) from the top of the mandibular canal to the alveolar crest on cross-sectional image.
Figure 3
Figure 3
CBCT images before and after the correction of the mandibular planes. The inferior border of the mandible (mandibular plane) was positioned at 5-, 10-, 15-, and 20-degree angles relative to CBCT scanning table, and the mandibular planes at different angles were corrected to the 0-degree position using the software. (a) Five-degree angle location. (b) Ten-degree angle location. (c) Fifteen-degree angle location. (d) Twenty-degree angle location.
See this image and copyright information in PMC

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