Abstract
BackgroundRoot fractures are a diagnostic challenge for dentists in endodontic treatment. This study aimed to determine the relationship between the characteristics of tooth fractures and the presence of root canal posts in endodontically treated teeth using high-resolution cone beam computed tomography (CBCT). Material and MethodsFifty high-resolution CBCT scans of endodontically treated teeth with a diagnosis of fracture were obtained, of which 30 were from women and 20 were from men. These scans were acquired with three Veraviewepocs 3D units and one 3D Accuitomo 170 unit, with a 40 × 40-mm field of view and 125 μm voxel size. The variables assessed included the type of fracture, extent of fracture, type of retention, post length, cause of endodontic failure, location of the lesion, and time required to detect the fracture (difficulty score). For data analysis, the chi-squared test, Student’s t-test, and multiple linear regression (α <0.05) were used. ResultsNo association was found between the type of fracture and type of retention or between the type of fracture and its extent (P>0.05). On the other hand, the type of fracture significantly influenced the time required for its detection. Additionally, the most difficult plane for detecting the fracture and the difficulty score were associated, with statistically significant results. ConclusionsThe type of fracture in endodontically treated teeth was not associated with the type of post used for restoration. All of the CBCT systems used to detect tooth fracture showed the same efficiency. Key words:Cone-Beam CT, Tooth Fracture, Root Canal Post.
Highlights
Root fractures are a diagnostic challenge for dentists because their signs and symptoms are not present in all cases, and they are difficult to differentiate from endodontic treatment failures
Considering the results described in the literature regarding the high diagnostic efficiency of high-resolution tomographic images to detect root fractures in teeth with posts, the purpose of the present study was to determine the relationship between the characteristics of tooth fractures and the presence of root canal posts in endodontically treated teeth using high-resolution cone beam computed tomography scans acquired in four radiology centers
The results showed that the type of fracture is not related to the type of retention used, which coincides with the results reported by Tsai et al [24] where the presence of a post was not closely related to the presence of horizontal or vertical root fractures in posterior teeth [25]
Summary
Root fractures are a diagnostic challenge for dentists because their signs and symptoms are not present in all cases, and they are difficult to differentiate from endodontic treatment failures They cannot always be detected with conventional radiographs [1,2]. Among the main causes of root canal treatment failure are those that could be visualized radiographically, such as open apices, root perforations, and root fractures [16], while 45.1% of endodontically treated teeth showed a periapical lesion when assessed by CBCT [17]. This study aimed to determine the relationship between the characteristics of tooth fractures and the presence of root canal posts in endodontically treated teeth using high-resolution cone beam computed tomography (CBCT). All of the CBCT systems used to detect tooth fracture showed the same efficiency
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