Mandibular Posterior Teeth Rhomboid Form Quiz

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Questions and Answers

What is the shape of the proximal crown outline of the mandibular posterior teeth?

  • Triangular
  • Rhomboidal (correct)
  • Trapezoidal
  • Rectangular

What is the purpose of the rhomboidal crown outline of the mandibular posterior teeth?

  • To facilitate the initial penetration of food material (correct)
  • To increase the stability of the teeth in the jaw
  • To increase the surface area for chewing
  • To reduce the masticatory forces transmitted to the periodontium

How does the rhomboidal crown outline of the mandibular posterior teeth differ from the trapezoidal outline of the maxillary posterior teeth?

  • The trapezoidal outline facilitates the sliding of food material along the crown surfaces (correct)
  • The rhomboidal outline has a wider base for strength
  • The trapezoidal outline has a narrower occlusal surface
  • The rhomboidal outline allows for more efficient resistance against masticatory forces

What is the purpose of the progressive incisal constriction of the tooth crown?

<p>To reduce the trauma to the marginal gingiva as food slides over the cervical tooth surface (A)</p> Signup and view all the answers

What is the purpose of the narrow occlusal surface of the maxillary posterior teeth?

<p>To facilitate the initial penetration of food material (B)</p> Signup and view all the answers

What is the purpose of the trapezoidal crown outline of the maxillary posterior teeth?

<p>To allow the sliding of food material along the inclined planes of the crown surfaces (A)</p> Signup and view all the answers

How does the trapezoidal crown outline of the maxillary posterior teeth differ from the rhomboidal outline of the mandibular posterior teeth?

<p>The trapezoidal outline has a wider base for strength, while the rhomboidal outline has a narrower occlusal surface (D)</p> Signup and view all the answers

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