Fig. 4

Relationship between the detection of tonsilloliths on CT and the extent of the bone defect caused by periodontitis on panoramic radiographs in the 30s age group. a Axial CT images at the palatine tonsillar level showing a tonsillolith in a 32-year-old female patient. b Panoramic radiographs showing almost no bone defect by periodontitis in the same patient of Fig. 4a. c Axial CT images at the palatine tonsillar level showing no tonsillolith in a 32-year-old female patient. d Panoramic radiographs showing almost no bone defect caused by periodontitis in the same patient of Fig. 4c