NDEB Dental Anatomy and Occlusion

Question 1

The mandibular first molar typically has how many cusps?

Accepted Answer

5

Answer

The mandibular first molar has 5 cusps: mesiobuccal, distobuccal, mesiolingual, distolingual, and distal.

Question 2

Which permanent tooth typically has the longest root in the maxillary arch?

Accepted Answer

Maxillary canine

Answer

The maxillary canine has the longest root in the maxillary arch, averaging approximately 17 mm in length.

Question 3

The cusp of Carabelli is an accessory cusp most commonly found on which surface of the maxillary first molar?

Accepted Answer

Mesiolingual cusp

Answer

The cusp of Carabelli appears on the mesiolingual (palatal) cusp of the maxillary first molar and is considered an accessory developmental feature.

Question 4

How many roots does the maxillary first molar typically have?

Accepted Answer

3

Answer

The maxillary first molar has 3 roots: the mesiobuccal, distobuccal, and palatal (lingual) roots.

Question 5

The oblique ridge is a characteristic anatomical feature of which tooth?

Accepted Answer

Maxillary first molar

Answer

The oblique ridge of the maxillary first molar connects the mesiolingual and distobuccal cusps diagonally across the occlusal surface.

NDEB - National Dental Examining Board Practice Test