1. Cusp of Carabelli

2. General information
• It is accessory lingual cusp located on the mesio
palatal cusp of maxillary second deciduous
molars and first second and third permanent
molars
• It may be unilateral or bilateral, with marked
deviation in size.
• In some cases, accessory cusp is seen
occasionally on mandibular permanent or
deciduous molar
• this is called as protostylid