The palate was the most common location for oral malignant melanoma. Thus, all melanocytic lesions in the palate should be viewed with caution, and biopsy is recommended to rule out melanoma.
PurposeThis study evaluated the diagnostic accuracy of the reverse contrast mode in intraoral digital radiography for the detection of proximal dentinal caries, in comparison with the original digital radiographs.Materials and MethodsEighty extracted premolars with no clinically apparent caries were selected, and digital radiographs of them were taken separately in standard conditions. Four observers examined the original radiographs and the same radiographs in the reverse contrast mode with the goal of identifying proximal dentinal caries. Microscopic sections 5 µm in thickness were prepared from the teeth in the mesiodistal direction. Four slides prepared from each sample used as the diagnostic gold standard. The data were analyzed using SPSS (α=0.05).ResultsOur results showed that the original radiographs in order to identify proximal dentinal caries had the following values for sensitivity, specificity, positive predictive value, negative predictive value, and accuracy, respectively: 72.5%, 90%, 87.2%, 76.5%, and 80.9%. For the reverse contrast mode, however, the corresponding values were 63.1%, 89.4%, 87.1%, 73.5%, and 78.8%, respectively. The sensitivity of original digital radiograph for detecting proximal dentinal caries was significantly higher than that of reverse contrast mode (p<0.05). However, no statistically significant differences were found regarding specificity, positive predictive value, negative predictive value, or accuracy (p>0.05).ConclusionThe sensitivity of the original digital radiograph for detecting proximal dentinal caries was significantly higher than that of the reversed contrast images. However, no statistically significant differences were found between these techniques regarding specificity, positive predictive value, negative predictive value, or accuracy.
Introduction: According to the prevalence of sore mouth, its outcome and possible role of anemia in its etiology and some contradictions in this theory, our study was performed to evaluate the role of iron deficiency anemia as a etiological factor for sore mouth. Materials and Methods: This historical cohort study was performed on 40 cases, including 20 anemic patients as the experimental group and 20 healthy individuals as the control group with similarity in socio economical, sex and age factors. Oral examination was carried out in two groups to evaluate soremouth presentations including atrophic glossitis, recurrent oral ulceration, pale oral mucosa, tongue burning sensation, glossodynia and angular cheilitis. Data was analyzed by chi-square test. Attributable risk (AR) and related risk (RR) were calculated. Results: Out of 40 studied cases, sore mouth manifestations were found in (45%) of individuals in case and (5%) control groups (p<0.005). Regarding the anemic patients, RR and AR of sore mouth were 9 and 40% respec vely. The most prevalent manifestations of sore mouth were atrophic glossitis, recurrent oral ulceration, pale oral mucosa, tongue burning sensation, glossodynia and angular cheilitis. Conclusion: According to this study, it seems iron deficiency anemia has a significant role in sore mouth incidence. Evaluation of anemia treatment effect on sore mouth elimination is recommended.
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