Fig 1.

a, b. Torus palatinus. Intraoral view of two peritoneal dialysis patients with a flat torus palatinus (asterisk), which is an exophytic bony mass that arises along the midline of the hard palate. c, d. Torus mandibularis. Intraoral view of two peritoneal dialysis patients with a symmetrical lobular torus mandibularis (asterisk), which is an exophytic bony mass that arises along the lingual aspect of the mandible. Heavy dental calculus accumulating at cervical portion of teeth was also found in most patients.