Akademik Veri Yönetim Sistemi
Dentomaxillofacial Radiology, cilt.39, sa.2, ss.95-99, 2010 (SCI-Expanded)
Objectives: The aim was to assess the accuracy and reproducibility of measurements of chemically created periapical lesions using limited cone beam CT. Methods: Periapical lesions were chemically created in 18 mandibular cadaver teeth. Mandibles were dissected buccolingually using a bone-cutting burr. Diameters and depths were measured directly in the cross-sectional slices using a precision digital caliper. The crosssectional slices were then embedded in wax, and cone beam CT images were acquired using a NewTomH 3G Plus scanner with both 6 inch and 9 inch fields of view (FOVs). Two oral radiologists measured the diameter and depth of periapical lesions on the cross-sectional images using the built-in measurement tools. Measurements were repeated after a 1 week interval. Inter- and intraobserver agreement was calculated by ANOVA. Regression analysis was used to test the correlation between the cone beam CT and digital caliper measurements. Results: No significant differences were found in diameter or depth measurements between or within observers or between 6 inch and 9 inch FOV images. Regression analysis of diameter and depth measurements made by direct caliper versus 6 inch or 9 inch FOV images revealed a high regression coefficient (for diameter: 6 inch FOV, R2594.6%; 9 inch FOV, R 2594.8%; P,0.001; for depth: 6 inch FOV, R2599.3%; 9 inch FOV, R2599.3%; P,0.001) showing a strong linear relationship. For the diameter, the mean deviation from direct caliper measurements was 0.0625 mm and 0.08958 mm, respectively; for the 6 inch FOV and 9 inch FOV images, and for depth, the mean deviation was, respectively, -0.1001 mm and 0.09875 mm. Conclusions: Cone beam CT yielded highly accurate and reproducible results in the quantitative assessment of periapical lesions. © 2010 The British Institute of Radiology.