ABSTRACT
Statement of Problem: Different imaging modalities are used for diagnostic objectives in implant treatment and the results are interpreted using individual subjective measurements. The significant differences among the observers' interpretation may result in various treatment outcomes
Purpose: The present study was done to assess the radiologists' agreement on measurement of alveolar bone dimensions in tomographies before implant surgeries
Materials and Method: In this observational diagnostic study, 30 digital conventional tomography images in a dental implant clinic were displayed on a monitor and four observers assessed them using "Digora for windows" software. The length and width of the alveolar bone in the implant recipient site were determined by the observers independently. The data were analyzed using paired T-Test and variance for repeated measures
Results: The means of the predicted length of the alveolar bone were 30.33, 31.48, 30.63 and 30.8 mm and those for the width were 12.0, 11.63, 12.13 and 7.82 mm, as estimated by each observer. The mean predicted value for the width of the implant recipient site was significantly different among observers [p <0.0001], but no significant difference was found for length. The observers' agreement in width assessment with 1mm difference was 3.3% to 40% and 10% to 73.3% with 2mm difference. The observers' agreement in the length detection was 16.7% to 33.3% with 1 mm difference and 33.3% to 60% within 2 mm difference. A higher observer agreement was found in the prediction of the alveolar bone length compared to the width
Conclusion: The results of the study show that the observers' agreement on detecting the alveolar bone length and width in the implant recipient site is not acceptable. However, a slightly higher agreement was estimated for the length of the alveolar bone as compared to the width
ABSTRACT
Presence of Haller cells with or without disease can narrow the ethmoid infundibulum or ostium of maxillary antrum and result in persistent rhinosinusitis, recurrent sinusitis, and other clinical symptoms, so detection of haller cells in common panoramic radiographs can be useful in diagnosis of the origin of these problems. The purpose of the present study was to determine the prevalence of infraorbital ethmoid cells on panoramic radiographs. Panoramic radiographs of 310 patients were evaluated according to the method of Ahmad et al. to detect infraorbital ethmoid cells. A well defined radiolucency was located medial to infraorbital foramen, wherever most of its border was visible and caused lack of cortication in inferior border of the orbit in the superimposition areas, was interpreted as infraorbital ethmoid cell. The radiographs were interpreted by three observers. the data were analyzed by Binary logistic regression test in SPSS software. Data from 310 panoramic radiographs were analyzed. 37% of radiographs were interpreted as to show infraorbital ethmoid cells. Infraorbital ethmoid cell might be considered as a quite common anatomic landmark, visible on panoramic radiographs. From a clinical point of view, this may be of diagnostic importance, because it has been stated that detection of haller cells may lead to detection of the origin of a number of sinus problems