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The European Journal of Orthodontics Advance Access published online on February 23, 2009
The European Journal of Orthodontics, doi:10.1093/ejo/cjn105
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© The Author 2009. Published by Oxford University Press on behalf of the European Orthodontic Society. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Comparison of cephalometric measurements with digital versus conventional cephalometric analysis

Erkan Celik*, Omur Polat-Ozsoy** and T. Ufuk Toygar Memikoglu***

* Private Practice
** Department of Orthodontics, Baskent University
*** Department of Orthodontics, Ankara University, Turkey

Address for correspondence Dr Omur Polat-Ozsoy, Ali Dede sk. No:35/13, Y. Ayranci, Ankara, Turkey, E-mail:omurorto{at}yahoo.com


  Abstract

The aim of this study was to evaluate the accuracy and reliability of angular and linear cephalometric measurements using a computerized method of direct digital radiographs. This was then compared with the measurements obtained with a computerized method that uses a digitizing pad and hand tracing of printout radiographs.

Pre-treatment digital cephalometric radiographs of 125 patients were traced using Vistadent 2.1 AT and Jiffy Orthodontic Evaluation (JOE) software programs and by hand tracing of the printouts. Twenty-six anatomical landmarks were defined on each radiograph by a single investigator and 28 variables were calculated. Statistical analysis was undertaken using one-way analysis of variance and multiple group comparisons using Duncan's test at a significance level of 0.05.

Low correlation coefficients indicated poor reproducibility for nasolabial angle for each of the three methods (P > 0.05). Most of the variables showed consistency between the three methods except for nasolabial angle, ANS–Me, APFH, L1–NB, Nperp–Pg, Go–Me, and U1–NA measurements. The findings indicated that most of the cephalometric measurements were highly reproducible with direct digital radiographs using Vistadent 2.1 AT as well as with printouts using both JOE software and hand tracing. Despite the low correlation for some measurements between the Vistadent 2.1 AT, JOE, and hand-tracing methods, most of the commonly used measurements were accurate. The user-friendly and time-saving nature of the computerized method using digital radiographs makes it the preferred option.


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