Cone-beam computed tomography (CBCT) has been developed as a new imaging modality for dentists to diagnose various diseases and to determine treatment plan options. It can display the images in axial, sagittal, and coronal planes, as well as permitting three-dimensional (3D) image reconstruction. Therefore, CBCT is widely used in several dental applications.1 Recently, there have been studies on the accuracy in detection of caries using CBCT. 2-9 However, the effectiveness of CBCT in caries detection has been still equivocal. Akdeniz et al 2 found that limited cone beam computed tomography (LCBCT) was better to assess the depth of proximal caries than intra-oral digital imaging systems using storage phosphor plate sensors and film. The 3DX Accuitomo system (Mortita, Kyoto, Japan), one of the CBCT systems, was reported to show significantly higher sensitivity than 2D images in detecting proximal dentin caries. 4,5 For proximal enamel caries, Young et al 5 found that the 3DX Accuitomo was a superior imaging modality to intra-oral digital imaging systems using charge coupled device (CCD) sensors. Kayipmaz et al 7 stated that CBCT images could detect occlusal caries better than conventional films and storage phosphor plates, whereas no signifcant difference was found for proximal caries. Kamburoglu et al 9 found that CBCT images improved the detection of occlusal caries in deep enamel, superficial dentin, and
ABSTRACTPurpose : The aim of this study was to compare the diagnostic accuracy of cone-beam computed tomography (CBCT) images and bitewing images in detection of secondary caries. Materials and Methods : One hundred and twenty proximal slots of Class II cavities were randomly prepared on human premolar and molar teeth, and restored with amalgam (n= =60) and composite resin (n= =60). Then, artificial secondary caries lesions were randomly created using round steel No. 4 bur. The teeth were radiographed with a conventional bitewing technique and two CBCT systems; Pax-500ECT and Promax 3D. All images were evaluated by five observers. The area under the receiver operating characteristic (ROC) curve (A z ) was used to evaluate the diagnostic accuracy. Significant difference was tested using the Friedman test (p value⁄0.05).Results : The mean A z values for bitewing, Pax-500ECT, and Promax 3D imaging systems were 0.882, 0.995, and 0.978, respectively. Significant differences were found between the two CBCT systems and film (p= =0.007). For CBCT systems, the axial plane showed the greatest A z value. Conclusion : Based on the design of this study, CBCT images were better than bitewing radiographs in detection of secondary caries. (Imaging Sci Dent 2011; 41 : 143-50)
Objectives: (1) To compare the efficacy of a commercially available hygienic sheath and an alternative plastic bag in preventing contamination of the imaging plate during intraoral radiography and (2) to compare patient discomfort when using the hygienic sheath and the plastic bag. Methods: 60 sterilized Size 2 imaging plates covered with either the hygienic sheath (n 5 30) or the plastic bag (n 5 30) were used to simulate digital periapical radiographic examination in 30 volunteer patients. After disinfection, each plate was swabbed. The swabbed medium was then plated on trypticase soy agar and incubated. Bacterial colonies were counted. Patient discomfort was assessed using a visual analogue scale (VAS) score. The comparison of the number of bacterial colonies and VAS scores between the two groups was tested by paired t-test at p , 0.05. Results: There was no significant difference in the number of bacterial colonies between the two groups (p 5 0.745). Of all the plates, 10% plates yielded bacterial colonies. The mean count of bacterial colonies for both groups was 10-20 CFU ml 21 . However, there was a significant difference between VAS scores for the two systems (p 5 0.000). The mean VAS scores (range 0-10) for patient discomfort for the hygienic sheath group and the plastic bag group were 3.03 and 5.33, respectively. Conclusions: Based on the design of this study, the alternative barrier provided similar results to those commercially available. Regarding the type of barrier envelope, the hygienic sheath induced less discomfort than the plastic bag.
A number of errors that were identified in the published version of this article. In particular, there are incorrect F1 scores and AP values for both IOU50 and IOU75 in Table 2 on page 6 and the Results section on pages 6 to 7.The original article has been corrected.Publisher's note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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