Dental Anatomy II: Permanent Mandibular Molars

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Questions and Answers

What is the key difference between the distal root (DR) and mesial root (MR) according to the text?

  • DR is longer and wider than MR
  • DR has a more pointed apex compared to MR (correct)
  • DR has a deeper depression on the root
  • DR has fewer root canals than MR

What is the geometric outline of the crown described in the text?

  • Rectangular (correct)
  • Triangular
  • Oval
  • Circular

Which crown measurement is larger than the other?

  • Mesio-distal (MD) width is larger than bucco-lingual (BL) thickness (correct)
  • MD and BL measurements are equal
  • Bucco-lingual (BL) thickness is larger than mesio-distal (MD) width
  • The text does not provide this information

How is the crown described in terms of convergence?

<p>The crown converges lingually and distally (A)</p> Signup and view all the answers

Which of the following statements about the buccal and lingual outlines of the crown is correct?

<p>The buccal outline is larger than the lingual outline (B)</p> Signup and view all the answers

How is the mesial outline of the crown described compared to the distal outline?

<p>The mesial outline is longer than the distal outline (B)</p> Signup and view all the answers

How many cusps are described on the occlusal surface?

<p>4 cusps (D)</p> Signup and view all the answers

Which cusp is described as the largest?

<p>The mesio-buccal cusp (MBC) (D)</p> Signup and view all the answers

How many major fossae are described on the occlusal surface?

<p>1 major central fossa (C)</p> Signup and view all the answers

What is the pattern of the developmental grooves on the occlusal surface?

<p>Cross-shaped pattern (B)</p> Signup and view all the answers

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