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. 2015 Jul 16;5:12150. doi: 10.1038/srep12150

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(A) Occlusal view of the RM₃ digital model, with underlined some of the areas where striations were observed. (B) The SEM images: 1, the chipping area; 2a-b-c, the mesial area; 3a-b, the buccal wall of the cavity; 4a-b, the lingual wall of the cavity; 5, inside the large carious lesion.