Liz Maas
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Liz Maas
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39 Exfoliation

Question 1 of 11

1

The gubernacular cord is a remnant of the

Select one of the following:

  • dental lamina

  • labiogingival lamina

  • successional lamina

  • reduced enamel epithelium

  • epithelial cuff

Explanation

Question 2 of 11

1

Which of the following are required for interosseous tooth eruption?

Select one of the following:

  • Intact dental follicle

  • Periodontal ligament

  • inflammatory cytokines

  • Intact dental follicle and periodontal ligament

  • All of the things

Explanation

Question 3 of 11

1

Pre-erruptive movements include

Select one of the following:

  • mesially, distally, occlusaly

  • distally, occlusally, labially

  • distally occlusally, lingually

  • mesially, lingually, occlusally

  • labially, lingually, occlusally

Explanation

Question 4 of 11

1

Which of the following is incorrect about permanent teeth?

Select one of the following:

  • incisors develop and erupt lingual to the deciduous tooth

  • canines develop and erupt lingual to the deciduous tooth

  • premolars develop and erupt between roots of deciduous molars

  • maxillary molars start with a mesial inclination, mandibular with a distal inclination

  • none of the above

Explanation

Question 5 of 11

1

Post-eruptive tooth movement includes...

Select one of the following:

  • Occlusal wear compensation via PDL fibroblast activity

  • Tipping which can lead to collapse of bite

  • Accommodation for vertical jaw growth and apical alveolar bone growth

  • Compensation at interproximal contacts which causes tendency towards midline movement

  • all of the choices

Explanation

Question 6 of 11

1

During active eruption, the formation and presence of oblique fibers of the PDL is the major cause of eruptive movement according to which theory of growth?

Select one of the following:

  • bone growth

  • root growth

  • vascular pressure

  • ligament traction

  • tissue suction

Explanation

Question 7 of 11

1

Why is the root growth theory discredited?

Select one of the following:

  • The root is formed before the tooth erupts

  • If root and alveolar bone make contact, bone will be resorbed

  • The root is never in contact with the floor of the alveolus

  • resorption and contact

  • all

Explanation

Question 8 of 11

1

Active eruption of a primary tooth involves all of the following except?

Select one of the following:

  • formation of anatomical REE becomes primary junctional epithelium

  • formation and organization of PDL

  • bone resorption and remodelling

  • enzymatic removal of soft tissues over the crown

  • degradation of gubernacular cord

Explanation

Question 9 of 11

1

Which of the following causes monocytes to fuse and become osteoclasts?

Select one of the following:

  • EGB

  • TGF-B1

  • CSF-1

  • IL-1

  • IL-2

Explanation

Question 10 of 11

1

Which of the following attracts monocytes and macrophages during tooth eruption?

Select one of the following:

  • EGF

  • TGF-B1

  • CSF-1

  • IL-1

  • IL-2

Explanation

Question 11 of 11

1

If there is no succedaneous tooth following a deciduous tooth, what happens?

Select one of the following:

  • It will never be shed

  • It will shed and leave a hole for the non-existent tooth behind.

  • It could shed at some other time

  • It will shed as normal

  • The tooth fairy will magically transform it into a succedaneous tooth

Explanation

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