Resumo

BONILLA LONDONO, Margarita María; BARRERA CHAPARRO, Judith Patricia; ARROYAVE GODOY, Ángela Patricia  e  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.

Palavras-chave : cephalometry; reproducibility of results; radiography; radiographic imaging by dual photon emission.

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