A comparison of angle measure reproducibility between manual and computerized tracing


  • Margarita María Bonilla-Londoño Fundación Universitaria San Martín
  • Judith Patricia Barrera-Chaparro Universitaria San Martín
  • Ángela Patricia Arroyave-Godoy Fundación Universitaria San Martín
  • Mónica Eliana Díaz-Roa Fundación Universitaria San Martín


Cephalometry, Reproductibility of results, Radiography, Radiographic imaging by dual photon emission


Introduction: digital cephalometry allows handling errors produced during manual tracing; the purpose of this study was therefore to evaluate the reproducibility and precision of angle measures between manual tracing and that obtained with Cephapoint in digital radiography. Methods: 11 direct digital radiographs taken to orthodontics students were introduced in the Cephapoint computer program. 9 angles were measured in both hand-tracing digital radiography and Cephapoint. All measurements were made by 3 operators with 1-week interval. We calculated the average interobserver error to find the reproducibility of each angle measure, and the average intra-observer error to determine the accuracy of each observer. Results: the FH/N/Pg angle showed the smallest interobserver error difference (0.10°) in both methods, favoring manual tracing. On the other hand, the angles with the smallest inter-observer error difference in computerized tracing were LI-NB (0.11°) and N-A/Pg (0.11°). Intraobserver reproducibility showed excellent Intraclass Correlation Coefficient (ICC) in both methods. Conclusions: reproducibility of angular measurements did not show significant differences between manual and computerized tracing. According to the findings of this study, the methods under evaluation offer equal diagnostic validity.

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Author Biographies

Margarita María Bonilla-Londoño, Fundación Universitaria San Martín

Dentist, Specialist in Orthodontics, Fundación Universitaria San Martín, Bogotá, Colombia.

Judith Patricia Barrera-Chaparro, Universitaria San Martín

Dentist, Specialist in Epidemiology. Research Professor, Graduate School of Dentistry, Fundación Universitaria San Martín, Bogotá, Colombia.

Ángela Patricia Arroyave-Godoy, Fundación Universitaria San Martín

Dentist, Specialist in Orthodontics, Fundación Universitaria San Martín, Bogotá, Colombia

Mónica Eliana Díaz-Roa, Fundación Universitaria San Martín

Dentist, Specialist in Orthodontics, Fundación Universitaria San Martín, Bogotá, Colombia


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How to Cite

Bonilla-Londoño, M. M., Barrera-Chaparro, J. P., Arroyave-Godoy, Ángela P., & Díaz-Roa, M. E. (2014). A comparison of angle measure reproducibility between manual and computerized tracing. Revista Facultad De Odontología Universidad De Antioquia, 25(2), 299–312. Retrieved from https://revistas.udea.edu.co/index.php/odont/article/view/11748