Q: Which Tooth Has a Buccal Pit

Apr 18 / Claire Jeong, RDH, MS
Which tooth has a buccal pit?

(A.) Mandibular first molar
(B.) Maxillary first molar
(C.) Mandibular second molar
(D.) Maxillary second molar
First, What is a buccal pit? It is a small depression found on the cheek-facing (buccal) surface of certain teeth, most commonly the <insert answer to the above question>. It’s located between the buccal cusps and can trap food and bacteria, making it a common site for cavities. Because of this, buccal pits are often sealed or closely monitored during dental exams to prevent decay.

Answer: (A.) Mandibular first molar

Here are some characteristics of the mandibular first molar:

  • Has 2 roots
  • Has 5 cusps (3 facial, 2 lingual)
  • Is generally the first tooth to erupt in the permanent dentition
  • A buccal pit (depression on the buccal aspect of the tooth) is present
The buccal pit can facilitate biofilm retention which promotes caries, and for this reason it is often sealed or treated.
All other teeth do not have buccal pits.
One characteristic of the maxillary first molar is the presence of the cusp of Carabelli.

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