Abstract
Objectives
To evaluate the effect of enhancement tools of intraoral digital radiographs on the assessment of vertical root fracture (VRF) and to quantify the resultant image noise.
Materials and methods
Thirty single-rooted human teeth (15 control and 15 fractured) were each radiographed in four intracanal conditions: no filling, gutta-percha, metal post, and fiberglass post, totaling 120 original images. Two filters were applied to the original images—Sharpen filter (SF) and Edge Enhancement filter (EE), and brightness and contrast were adjusted in four combinations (B&C1 to 4), resulting in 840 images. Five oral radiologists analyzed the images for VRF detection. Pixel intensity was obtained in two regions from the radiographs. Diagnostic values were calculated and compared by two-way ANOVA, and the SD values of pixel intensity values were compared by one-way ANOVA (α = 0.05).
Results
There were no significant differences in accuracy for VRF detection between the experimental groups (p > 0.05). Teeth with metal post presented the lowest sensitivity (p < 0.05) for all experimental conditions, except for SF and EE (p > 0.05). B&C2, B&C3, and B&C4 had higher specificity than SF (p ≤ 0.05) for all intracanal conditions. Analysis of pixel intensity showed that all enhanced images presented statistically significant higher noise compared to those of the original images (p ≤ 0.05).
Conclusion
Digital enhancement tools in digital radiography increase image noise; however, they can be used without compromising VRF detection.
Clinical relevance
The use of digital enhancement does not impair the detection of VRF and, therefore, can be applied for this purpose according to the observer preference.
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This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Finance Code 001.
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All procedures performed in this study were conducted in accordance with the ethical standards of the institutional Research Ethics Committee of the Piracicaba Dental School, UNICAMP (#2.057.024) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Gaêta-Araujo, H., Nascimento, E.H.L., Oliveira-Santos, N. et al. Effect of digital enhancement on the radiographic assessment of vertical root fractures in the presence of different intracanal materials: an in vitro study. Clin Oral Invest 25, 195–202 (2021). https://doi.org/10.1007/s00784-020-03353-x
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DOI: https://doi.org/10.1007/s00784-020-03353-x