Resumo

BONILLA LONDONO, Margarita María; BARRERA CHAPARRO, Judith Patricia; ARROYAVE GODOY, Angela Ptricia  e  DIAZ ROA, Mónica Eliana. REPRODUCIBILITY OF SOFT TISSUE CEPHALOMETRIC LANDMARK IDENTIFICATION BY CONVENTIONAL AND DIGITAL DIRECT RADIOGRAPHY. Rev Fac Odontol Univ Antioq [online]. 2013, vol.25, n.1, pp.76-91. ISSN 0121-246X.

INTRODUCTION: there is little information on the reproducibility of soft tissue cephalometric points; the purpose of this study was then to evaluate the reproducibility and accuracy of soft tissue cephalometric landmark identification in direct digital radiography and conventional radiography. METHODS: 11 pairs of conventional and direct digital radiographs were introduced in the Cephapoint program. 10 cephalometric points were located on a Cartesian plane (X and Y) in conventional and digital images. The measurements were taken twice by 3 operators with 1 week interval. Interobserver average error was calculated in order to assess reproducibility in each point, and intraobserver error was used to determine accuracy. RESULTS: interobserver error in soft tissue cephalometric points was less than 1 mm for most points in both images, except in chin and pogonion, with no statistically significant differences. Statistically significant differences were found between the variances in the X axis, with less variability in the case of digital radiography in these points: labrale superius (p = 0.043), subnasale (p = 0, 013), columella (p = 0.038), stomion superius (p = 0.029), and stomion inferius (p = 0.015). The Y axis did not show statistically significant differences between the two methods. The assessment of intraobserver reproducibility showed an excellent Intraclass Correlation Coefficient (ICC) (0.935) in both methods.. CONCLUSION: According to the findings of this study, the evaluated radiographs and methods offer similar diagnostic accuracy.

Palavras-chave : cephalometry; results reproducibility; radiography; double-photon emission radiographic image.

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