Resumen

BONILLA LONDONO, Margarita María; BARRERA CHAPARRO, Judith Patricia; ARROYAVE GODOY, Ángela Patricia  y  DIAZ ROA, Mónica Eliana. A COMPARISON OF ANGLE MEASURE REPRODUCIBILITY BETWEEN MANUAL AND COMPUTERIZED TRACING. Rev Fac Odontol Univ Antioq [online]. 2014, vol.25, n.2, pp.299-312. ISSN 0121-246X.

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.

Palabras clave : cephalometry; reproducibility of results; radiography; radiographic imaging by dual photon emission.

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