Performance of a photostimulable storage phosphor digital system with or without the sharpen filter and cone beam CT for detecting approximal enamel subsurface demineralization

Belém, Manuella Dias Furtado; Tabchoury, Cínthia Pereira Machado; Ferreira-Santos, Rívea Inês; Groppo, Francisco Carlos; Haiter-Neto, Francisco

doi:10.1259/dmfr.20120313

Cited by 14 publications

(12 citation statements)

References 34 publications

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“…Some studies evaluated the diagnosis of dental caries using CBCT images and found equivalent diagnostic performance to conventional and digital radiography. 8 9 12 18 19 However, the results obtained with CBCT in the present study disagree with those findings. Most previous studies validated CBCT using only teeth that were free of restorative materials (generally healthy teeth or teeth with small cavities or caries), unlike the present study.…”

Section: Discussioncontrasting

confidence: 99%

“…The results obtained in the present study are in agreement with those of previous studies regarding intraoral radiographs. 8 9 12 18 Although the intraoral methods that those authors used differed from the method used in the present study, it can be said that, in vitro, the results of periapical radiography were the same as the results of the bitewing radiographs used in the present study. More specifically, the principle of image generation is the same; that is, the image detector and the objects are parallel to each other, and the central radiation beam is perpendicular to them.…”

Section: Discussionmentioning

confidence: 51%

“…More specifically, the principle of image generation is the same; that is, the image detector and the objects are parallel to each other, and the central radiation beam is perpendicular to them. 8 As Table 2 shows, the AUROC values for the evaluations of bitewing radiographs (conventional, PSP, and CCD) exhibited no statistically significant differences from the real condition; therefore, this technique can be considered adequate.…”

Section: Discussionmentioning

confidence: 94%

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Accuracy of various imaging methods for detecting misfit at the tooth-restoration interface in posterior teeth

et al. 2018

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PurposeThe present study aimed to evaluate which of the following imaging methods best assessed misfit at the tooth-restoration interface: (1) bitewing radiographs, both conventional and digital, performed using a photostimulable phosphor plate (PSP) and a charge-coupled device (CCD) system; (2) panoramic radiographs, both conventional and digital; and (3) cone-beam computed tomography (CBCT).Materials and MethodsForty healthy human molars with class I cavities were selected and divided into 4 groups according to the restoration that was applied: composite resin, composite resin with liner material to simulate misfit, dental amalgam, and dental amalgam with liner material to simulate misfit. Radiography and tomography were performed using the various imaging methods, and the resulting images were analyzed by 2 calibrated radiologists. The true presence or absence of misfit corresponding to an area of radiolucency in regions subjacent to the esthetic and metal restorations was validated with microscopy. The data were analyzed using a receiver operating characteristic (ROC) curve, and the scores were compared using the Cohen kappa coefficient.ResultsFor bitewing images, the digital systems (CCD and PSP) showed a higher area under the ROC curve (AUROC) for the evaluation of resin restorations, while the conventional images exhibited a larger AUROC for the evaluation of amalgam restorations. Conventional and digital panoramic radiographs did not yield good results for the evaluation of resin and amalgam restorations (P<.05). CBCT images exhibited good results for resin restorations (P>.05), but showed no discriminatory ability for amalgam restorations (P<.05).ConclusionBitewing radiographs (conventional or digital) should be the method of choice when assessing dental restoration misfit.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 51%

Section: Discussionmentioning

confidence: 94%

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Accuracy of various imaging methods for detecting misfit at the tooth-restoration interface in posterior teeth

et al. 2018

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“…reported that use of “sharpen” filter resulted in high percentage of accurate detection of the presence (83%) and absence (79%) of enamel subsurface demineralization. [ 21 ] Abesi et al . and Castro et al .…”

Section: Discussionmentioning

confidence: 99%

Efficacy of denoising and enhancement filters for detection of approximal and occlusal caries on digital intraoral radiographs

et al. 2018

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Background and Objectives:Image processing and enhancement filters can significantly improve the diagnostic value of digital radiographs. Evidence shows that increasing the contrast and filtering improve the diagnostic accuracy for caries detection. This study sought to assess the diagnostic accuracy of original and enhanced digital radiographs for the detection of approximal and occlusal caries.Subjects and Methods:In this experimental study, incipient carious lesions were artificially created on 120 proximal and occlusal surfaces of human extracted permanent molar and premolar teeth. After mounting the teeth in wax, digital radiographs were obtained using photostimulable phosphor plates and enhanced by enhancement filters 1, 2, and 3 with/without denoising. Two oral and maxillofacial radiologists blinded to filtering viewed the radiographs and filled out a chart. A definite diagnosis was made by a pathologist by observing the samples under a stereomicroscope (gold standard). Data were analyzed using SPSS software version 16. Interobserver agreement was calculated using kappa statistics. Chi-square test was used to assess the correlation between qualitative variables.Results:Assessment of sensitivity, specificity, accuracy, positive predictive value, and negative predictive value showed that enhancement filter 2 without denoising was the most efficient and original radiographs (filter free) were the least efficient radiographs for the detection of carious and sound surfaces. Application of filters significantly increased the accuracy of caries detection on digital radiographs. The lowest diagnostic accuracy was noted for the detection of enamel lesions on original radiographs (52%). Enhancement filter 2 plus denoising was the best filter for the detection of these lesions (79.25%). No significant difference was noted among different filters for detection of carious and sound surfaces but enhanced, and original radiographs were significantly different in visualization and detection of caries (P < 0.05).Conclusion:Application of enhancement filters, particularly enhancement filter 2 with/without denoising, increases the accuracy of caries detection on digital radiographs.

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“…A buffer solution, developed in previous studies for simulation of carious lesions (ten Cate, Duijsters, 1982;Argenta et al, 2003;Ferreira et al, 2007;Belém et al, 2013), final volume of 1500 ml, distilled and deionized water was added, and the pH was then set at 4.8. Approximately 1 g of thymol crystals was also added to avoid fungal growth.…”

Section: Demineralizing Inductionmentioning

confidence: 99%

The impact on diagnostic yield of the scan mode of cone beam CT images in artificial external root resorption

Melo¹,

Leonardo²

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Introduction: Root resorption is an undesired but frequent side effect of orthodontic treatment. Several studies have already aimed to evaluate the performance of CBCT on this topic. However, none have addressed the peculiarities of the most common daily orthodontic scenario. The aim of the study was to evaluate the influence of CBCT scans on the diagnosis of artificial external root resorption in the apical third of anterior teeth. Materials and methods: One hundred extracted human anterior teeth were randomly assigned to 2 uneven groups (51 as the control and 49 as the experimental group). A limited area of the apical third of the root of the teeth of the experimental group was selected and a buffer solution was used to induce tooth subsurface demineralization. Before CBCT image acquisition, each tooth was coated with an approximately 0.3 mm thick layer of utility wax to simulate the radiographic appearance of the periodontal space and placed into an empty mandibular anterior socket of a partially edentulous dry human mandible. The mandible was placed into a polystyrene box filled with water prior to the CBCT examination to simulate soft-tissue attenuation and scattering. The CBCT images were obtained on an i-CAT unit (i-CAT Next Generation, Imaging Sciences International, Hatfield, PA) according to three protocols: (I) half scan (180°), 0.40 mm voxel size; (II) full scan (360°), 0.40 mm voxel size; and (III) full scan (360°), 0.125 mm voxel size. The 300 resultant CBCT DICOM volumes were imported into InVivo software (InVivo5, Anatomage, San Jose, CA) for evaluation by three blinded, previously calibrated observers using a fivepoint confidence rating scale. Cohen's kappa was used to calculate observers' agreement. vi The diagnostic values of sensitivity (Sn), specificity (Sp) and accuracy (Ac) were performed by pooling observer responses for every image modality. Receiver operating characteristic (ROC) were built and the areas under the curve (AUC) were calculated. The Sn, Sp and Ac values were compared by Cochran's Q test. The AUC values were compared by Mann-Whitney U test. Results: The observers' agreement ranged from 0.63 to 0.71, which was interpreted as a substantial agreement. Protocol III (0.125 mm voxel size) displayed the highest Sn (81.63 %), Ac (80.67%) and AUC (0.807). There were statistically significant differences between protocol III and the other two protocols (p < 0.001). The specificity of protocol I (84.97 %) was greater than that of protocols II (69.93 %) and III (79.74 %); however statistically significant difference was only found between protocols I and II (p = 0.005). Conclusion: Although there was no difference in accuracy between the degrees of rotation (half and full scan) within the same voxel size (0.4 mm), there was a considerable difference between those and the smallest voxel size (0.125 mm). In fact, it may be suggested that a more dedicated, high resolution scan should be acquired when one intends to investigate the early stage of external root resorption during orthodontic ...

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Performance of a photostimulable storage phosphor digital system with or without the sharpen filter and cone beam CT for detecting approximal enamel subsurface demineralization

Cited by 14 publications

References 34 publications

Accuracy of various imaging methods for detecting misfit at the tooth-restoration interface in posterior teeth

Accuracy of various imaging methods for detecting misfit at the tooth-restoration interface in posterior teeth

Efficacy of denoising and enhancement filters for detection of approximal and occlusal caries on digital intraoral radiographs

The impact on diagnostic yield of the scan mode of cone beam CT images in artificial external root resorption

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