Abstract
BackgroundThe use of cone-beam computed tomography images (CBCT) providing a better assessment of bone injuries, although the sensibility of lesions measurement might be improved by the use of enhancement filters. Objective: This study aimed to analyze the influence of enhancement filters in apical bone loss measurement.Material and MethodsEighteen CBCT cases randomly selected of apical bone loss were evaluated. The analyses were carried out following the evaluation in axial, coronal and sagittal protocols, using enhancement filters as Hard, Normal, and Very Sharp. The variables were statistically analyzed by Friedman and Wilcoxon test, Spearman’s rho, and intraclass correlation coefficient.ResultsThe differences between filters in axial and sagittal protocols were significant (p<0.05); however, this was not observed in the coronal slice. The use of Hard filter demonstrates better results than Very Sharp and Normal filter, improving significantly the bone loss measurement. A strong, significant and positive correlation was noted for all filters (with p< 0.001), such as a strong agreement between the variables, when the Normal filter was used as a reference.ConclusionsThe use of enhancement filters increases the sensitivity of alveolar bone loss measurement, with relative advantage for Hard filter. Key words:Cone-Beam computed tomography. endodontics. periapical periodontitis. image enhancement. alveolar bone loss.
Highlights
The endodontic treatment suggests a clinical and radiographic monitoring assess persistent apical lesions and bone loss
Several studies have evaluated the effect of enhancement filters on root fracture and caries [11,12,13]; few studies have assessed this effect in alveolar bone loss [8]
The intraclass correlation coefficient (ICC) was calculated to verify the agreement between the filters, ranging 0.97 - 0.99, which suggests a strong correlation between filters, as well as their validity (Table 2)
Summary
The endodontic treatment suggests a clinical and radiographic monitoring assess persistent apical lesions and bone loss. The CBCT is the gold standard for root canals morphology visualization and diagnosis injuries as fractures and resorption [5,6] The advantage of this method is the possibility of volumetric data by 3-dimensional reconstruction [7] and acquisition of images with graphical accuracy, compatible with real measurements [4]. This study aimed to analyze the influence of enhancement filters in apical bone loss measurement, using a cone-beam computed tomography in different observation protocols. The use of cone-beam computed tomography images (CBCT) providing a better assessment of bone injuries, the sensibility of lesions measurement might be improved by the use of enhancement filters. Conclusions: The use of enhancement filters increases the sensitivity of alveolar bone loss measurement, with relative advantage for Hard filter
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