Korean J Orthod.  2007 Dec;37(6):391-399.

The reliability of the cephalogram generated from cone-beam CT

• Kang JY
• Lim SH
• Kim KW

Abstract

OBJECTIVE
Three-dimensional approaches for the diagnosis and analysis of the dentofacial area are becoming more popular in accordance with the development of cone-beam CT (CBCT). The purposes of this study were to evaluate the reliability of cephalometric measurements of lateral cephalograms generated from a CBCT image by making comparisons with the traditional digital lateral cephalogram, and to evaluate the possibility of the clinical application of CBCT generated cephalogram images.
METHODS
Twenty patients whose external auditory meatus could be identified in the CBCT image were selected, and both CBCT and digital cephalograms were taken. Differences between the measurements of both cephalograms were tested by paired t-test.
RESULTS
Among the 22 measurements used, only U1-FH, Mx6 to PTV, and maxillomandibular difference showed statistically significant differences between the CBCT generated cephalogram and the digital cephalogram.
CONCLUSIONS
The results suggest that the CBCT generated cephalogram can be used for some cephalometric measurements not requiring porion, PTV, condylion as a landmark (SNA, SNB, U1 to SN, IMPA, interincisal angle, etc.).

Keyword

Cone-beam CT; Lateral cephalogram; Cephalometric analysis

MeSH Terms

Cone-Beam Computed Tomography*
Diagnosis
Humans