Liz Maas
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Liz Maas
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31 Cementum

Question 1 of 10

1

Which of the following is incorrect?

Select one of the following:

  • Primary cementum is formed before eruption

  • Secondary cementum is formed after eruption

  • Coronal cementum is seen in newly erupted teeth

  • Cellular fibrillar cementum comes first

  • Acellular, afibrillar cementum can be found on the enamel surface

Explanation

Question 2 of 10

1

What are the functions of Hertwig's Epithelial Root Sheath?

Select one of the following:

  • Determine root morphology

  • Release inductive factor

  • Synthesis of intermediate cementum

  • Inductive factor and odontoblast differentiation

  • All of the above

Explanation

Question 3 of 10

1

Which of the following is false?

Select one of the following:

  • Cellular fibrillar cementum can form over acellular cementum especially in apical portions of the root

  • Acellular fibrillar cementum is deposited against mantle dentin

  • Linear mineralization is controlled by cementoblasts

  • Cementum resorption can be pathological or physiological

  • Cementum deposition occurs throughout life

Explanation

Question 4 of 10

1

Intermediate cementum contains collagen type 4. Its origin is the ectomesenchyme.

Select one of the following:

  • T/T

  • T/F

  • F/T

  • F/F

Explanation

Question 5 of 10

1

Which of the following is false?

Select one of the following:

  • Amelogenin is expressed on root surface

  • Intermediate cementum isn't really cementum

  • Intermediate cementum contains both collagen type 4 and amelogenins

  • Intermediate cementum descends from epithelial cells, not mesenchymal cells

  • None of the above

Explanation

Question 6 of 10

1

Cell processes of the cementocyte are projected towards the PDL. Cellular, fibrillar cementum can be found at root apices.

Select one of the following:

  • T/T

  • T/F

  • F/T

  • F/F

Explanation

Question 7 of 10

1

Which is the most common relationship of the CEJ?

Select one of the following:

  • Cementum overlaps the enamel

  • But joint of cementum and enamel

  • Enamel overlaps the cementum

  • Gap between enamel and cementum

Explanation

Question 8 of 10

1

The most common site for enamel projections is on the maxillary central incisors. They are caused by a failure of HERS formation.

Select one of the following:

  • T/T

  • T/F

  • F/T

  • F/F

Explanation

Question 9 of 10

1

Which of the following is incorrect?

Select one of the following:

  • Cementicles are likely from reactivation of cell rests of Malassez

  • Enamel pearls are often on root furcations

  • Enamel projections are often on root furcations

  • Hypercementosis is frequently seen in the elderly

  • Enamel projections are often found on the labial side of lateral maxillary incisors

Explanation

Question 10 of 10

1

Which of the following would NOT be found in the interfibrillar matrix of cementum?

Select one of the following:

  • osteocalcin

  • osteonectin

  • sialoprotein

  • fibronectin

  • hydroxyapatite

Explanation

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