Browsing by Author "Aydin, Ulkem"

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    Accuracy of Digitally Enhanced Images Compared with Unprocessed Digital Images in The Detection of External Root Resorption
    (2017) Ghoncheh, Zahra; Afkhami, Farzaneh; Fard, Mohammad Javad Kharazi; Sorkhabi, Rasa Ebrahimi; Aydin, Ulkem; https://orcid.org/0000-0002-2130-2812
    This study was for comparing the accuracy of processed digital images (reverse-contrast and colorization) with that of unprocessed digital images in detection of external root resorption (ERR). Eighty single-rooted human teeth were selected for this study. Mild, moderate, and severe ERR were simulated on 20 teeth each, and 20 were left untreated. Digital images using the paralleling technique were made, and three types of images were finally produced: unprocessed, reverse-contrast, and colorized. Three experienced dentists examined the images. The Wilson confidence intervals were calculated to analyze the diagnostic data. The kappa statistic was used to determine interobserver agreement. For unprocessed images, the rate of correct classification of mild and moderate to severe ERR was 88.3 and 80.0 %, respectively. The corresponding rate for reverse-contrast images was 81.7 and 80.0 %, and that for colorized images was 93.3 and 80.0 %, respectively. The sensitivity of unprocessed images in the detection of mild and moderate to severe ERR was 0.93 and 0.84, respectively. The corresponding sensitivity for reverse-contrast images was 0.83 and 0.84, and that for colorized images was 0.93 and 0.84, respectively. The specificity of unprocessed, reverse-contrast, and colorized images was 0.90, 0.92, and 1.00, respectively. The kappa coefficient for interobserver agreement was 0.86 for unprocessed images, 0.88 for reverse-contrast images, and 0.89 for colorized images. The difference between the sensitivity and specificity of unprocessed, reverse-contrast, and colorized images was not statistically significant (p > 0.05). The three techniques were of similar and desirable accuracy in detection of ERR.
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    Imaging Characteristics of Stafne Bone Cavity: Pictorial Essay
    (2017) Aydin, Ulkem; Yildirim, Derya; Gormez, Ozlem; Bozdemir, Esin; Yilmaz, Omer; Erik, Ayse Aydogmus; Orhan, Mukkadder
    Background: Stafne bone cavities (SBCs) are typically seen on panoramic radiographs as unilocular, rounded or ovoid shaped, welldefined corticated radiolucencies that are located between the mandibular first molar and the angle of the mandible below the inferior alveolar canal, but they may rarely have different radiographic appearances and locations. Objectives: The purpose of this study was to evaluate the imaging features of SBC presenting various typical and atypical features and to show the contribution of different imaging techniques to diagnosis. Patients and Methods: Seventeen patients who had a panoramic radiograph that revealed an image compatible with SBC were investigated in this study. In addition to panoramic radiography, lateral oblique mandible projection for three patients, cone beam computed tomography (CBCT) for nine patients, magnetic resonance imaging (MRI) for two patients were performed to determine the exact location of the cavity and to confirm the diagnosis. Results: Seventeen patients were diagnosed with SBC. Two patients had bilobed SBC, one patient had a SBC on the buccal surface of the posterior mandible, one patient had a SBC located in the ramus mandible, one patient had a SBC located in the canine-premolar region namely anterior lingual variant as rare conditions. Conclusion: Imaging techniques such as CBCT and MRI have provided detailed information about definitive diagnosis of SBC in addition to panoramic radiographs. These techniques show the size, location and content of the SBC. If the SBC is atypical, complementary imaging techniques gain more importance.