Which of the following is not a type of trait of the permanent maxillary second premolar?
No, or almost never does the mesial marginal developmental groove cross the mesial marginal ridge.
Buccal view: narrow shoulders (margins of crown; mesio- and disto-occlusal angles).
Occlusal table outline: ovoid.
Mesiomarginal groove interrupts mesial marginal ridge.
Lingual view: buccal profile is not visible.