Detection of non-cavitated approximal caries lesions in digital images from seven solid-state receptors with particular focus on task-specific enhancement filters. An ex vivo study in human teeth

Abstract

The aim of this study was to compare detection of non-cavitated approximal caries lesions in images from seven solid-state intraoral digital receptors, with particular focus on two task-specific enhancement filters. One hundred and sixty approximal non-cavitated surfaces were radiographed under standardized conditions using the following seven intraoral solid-state digital receptors: two CMOS systems, Schick CDR-APS, and Kodak RVGui; and five CCD systems: Visualix, VistaRay, Dixi2, Sidexis, and Dr. Suni Plus. The Kodak RVGui digital images were captured with two task-specific, predefined enhancement filters ("dento-enamel" and "periodontal"). Eight observers examined the digital images for the presence or absence of approximal carious lesions. The teeth were subsequently sectioned for histological analysis, which served as the "gold standard" for the radiographic examination and allowed for a calculation of sensitivity, specificity, and overall accuracy. Both RVG modalities obtained the highest sensitivity values, which were significantly higher than with Visualix, Sidexis, and VistaRay images (all P<or=0.03). The RVG "periodontal" images also had a higher accuracy than Dixi2, Dr. Suni Plus, and CDR-APS (P<or=0.05). The RVG modalities also showed the largest observer variation, and their high sensitivities were mainly due to one observer. The sensitivity for VistaRay images was the lowest of all modalities and significantly lower than almost all the other digital systems (P<or=0.02; except for Visualix). Besides, Visualix images had lower sensitivity than CDR-APS, Dixi2, and Dr. Suni Plus images (P<or=0.003). On the other hand, the two RVGui image types showed the lowest mean specificity values. For overall accuracy, the differences among the modalities were non-significant (P>0.05).

Influence of Image Filters and Variation in Horizontal Angle of Incidence of X-ray Beam in Digital Interproximal Radiographs for Diagnosis of Secondary Caries in Esthetic Restorations

“…As seen in the results presented in the present manuscript, the application of different radiographic filters did not result in an improvement in the diagnosis of caries, corroborating the results found by Takeshita et al 3 Haiter-Neto et al 13 Booshehry et al 17 Belém et al 19 and…”

“…These programs allow image manipulation, such as adjustment in brightness and contrast, determination of the gray level, inversion of gray tones, application of pseudocolors, among other features. 3,[11][12][13] Therefore, as far as we know, few studies have compared the different digital image filters in the diagnosis of secondary caries lesions, with the influence of horizontal angulation. The aim of the present research was to evaluate the accuracy of diagnosing secondary caries artificially created in the pulp wall of premolars with mesio-occlusal-distal (MOD) restorations made with resin composite, by means of digital image filters, with alteration in the horizontal angulation in the interproximal radiographic technique, using a digital radiographic sensor complementary metaloxide-semiconductor (CMOS).…”

Influence of cone beam CT enhancement filters on diagnosis ability of longitudinal root fractures

“…These studies showed any effects on diagnostic accuracy by using the tested filters. 10,11,19 Another study concluded that some filters have improved the detection of caries lesions, whereas others cannot be recommended. 20 However, to the best of the authors' knowledge, this is the first attempt to evaluate the effect of different image filters on the detection of non-displacing longitudinal root fractures in CBCT images.…”

“…5 Different studies have analysed the effects of enhancement radiographic digital images to detect longitudinal root fractures and oclusal and proximal caries lesions. [9][10][11][12][13] Other studies have evaluated the effect of different digital image filters on various relevant anatomical structures. 14,15 Some other studies have evaluated effects of sharpen filters on CBCT images to detect transverse root fractures and external root resorption.…”

Proximal caries detection accuracy using intraoral bitewing radiography, extraoral bitewing radiography and panoramic radiography

“…No statistically significant difference was found between original and enhanced images in terms of diagnostic accuracy. 18,19 Accuracy of the detection of proximal enamel caries lesions using three intraoral storage phosphor plate digital systems (DenOptix, Gendex Dental Systems) and Digora FMX with white and blue plates (Soredex, Helsinki, Finland) has been compared to that of Insight film. 20 There was no significant difference in the diagnostic accuracy among Insight film and the Digora and DenOptix digital systems for proximal enamel caries.…”