Mandibular Molars

#17, 18, 19, 30, 31, 32

Mandibular 1st Molar

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Mandibular 2nd Molar

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Mandibular 3rd Molar

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Height of Contour

Root Depressions

Crown Shapes

Eruption and Calcification

**the mandibular 1st molar’s crown is complete by 4-5 years old per Dr. Joanne M. Falzone


  • 1. Which of the following statements best describes the occlusal shape of a permanent mandibular second molar?

  • 2. Which of the following permanent teeth is the first one to begin calcification?

  • 3. A 6 year old patient comes in for their biannual appointment. The patient is very excited because their first big-kid tooth is starting to erupt. What tooth is the patient most likely referring to?

  • 4. A patient comes in and complains of root pain in the area of tooth #31. What is most likely the minimum age of the patient?

  • 5. A patient is telling you about a tooth that recently got extracted. They don’t remember exactly which tooth it was, but they remember the tooth had two roots. What is the most likely tooth number for this tooth?

  • 6. If you are looking at the permanent mandibular 1st molars from the lingual side, what would you see?

  • 7. You are trying in a new crown for the patient on tooth #18. Upon feeling the crown with their tongue, the patient complains that the lingual side of that crown feels weird and that it bulges out way too close to the gums. How should you fix the crown?

  • 8. A patient is scheduled for root canal therapy on their permanent mandibular 1st molar. For each canal, the fee is $300. What can your patient be most likely charged for this procedure?

  • 9. Which of the following permanent teeth would most likely be impacted?

  • 10. How many fossa would you expect to find in the crown of a mandibular permanent molar?

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Learn More Anatomy


Nelson. (2009). Wheeler’s Dental Anatomy, Physiology and Occlusion (9th ed.). Elsevier.
Scheid, Weiss, G., & Woelfel, J. B. (2012). Woelfel’s dental anatomy (8th ed.). Wolters Kluwer Health/Lippincott Williams & Wilkins.