Diverse microbiota in palatal radicular groove analyzed by Illumina sequencing: Four case reports

Figure 1 Three-dimensional reconstruction of the teeth with palatal radicular groove and representative scanning electron microscope images for resected root apex. A and B: Intraoperative awareness of palatal groove during intentional replantation; C and D: Lingual view of the three-dimensional reconstruction models of type I and type II palatal grooves; E-J: Shapes of the pulp cavity associated with type I and II palatal grooves and their spatial and configurational relationship with the root; K-M: Gradually magnified scanning electron microscope photograph series of the biofilm covering the root apex of tooth with palatal radicular groove associated infection (K: × 1500; L: × 20000; M: × 40000).