Avaliação da influência de diferentes materiais intracanais na detecção de fraturas radiculares em dentes birradiculares por meio de TCFC

Abstract

Aim: The aim of this study was to evaluate the precision of images generated by two CBCT systems on the detection of artificially induced vertical root fractures (VRF) and artifact intensity using birooted teeth restored with different intracanal materials. Methods: The sample consisted of 20 extracted birooted premolars. Root fracture was induced in half of the sample. Seven root filling combinations were used in each tooth: unrestored, gutta -percha, a buccal root with gutta-percha and a lingual root with a fiberglass post, a buccal root with gutta-percha and a lingual root with a metal core fiberglass post, fiberglass posts, metal core fiberglass posts, and NiCr posts. CBCT scans were acquired using CS 9000 and OP300 units. Exposure parameters were fixed at 90kV and 8mA. Voxel and FOV were set at 0.085mm and 5x5cm for OP300 and 0.076mm and 5x3.75cm for CS 9000. Two observers assessed all images using a 5-point confidence scale for fracture detection and a 4-point score for artifact interference. Sensitivity, specificity, accuracy and AUC were compared by two -way ANOVA and Tukey test. Artefact interference was evaluated by descriptive statistics and Chi-square test. Results: There was no significant difference between intracanal materials and CBCT scanners for sensibility, accuracy and AUC values. There were significant differences between scanners (P = 0.008) and among the different intracanal material groups (OP300) (p <0.001) for specificity. Metal post + Metal post group showed severe artifact interference in all images. Conclusions: In summary, CS 9000 3D presented better performance than OP300 on vertical root fracture detection of endodontically treated teeth. Unrestored teeth and teeth filled with fiberglass posts were considered the groups with lowest artifact interference and highest VRF detection results.