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Occlusal (hidden) caries (CII): intraoral pictures of dental treatment (a) prior to the treatment, (b) after fissure sealant removal and (c) after excavation, and the respective three-dimensional ultrashort echo time (d) multislice turbo spin-echo (e) and X-ray (f) images. The white arrows in the MR images and the black arrow in the X-ray image indicate the lesion
