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Question 1
Question
The gubernacular cord is a remnant of the
Answer
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dental lamina
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labiogingival lamina
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successional lamina
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reduced enamel epithelium
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epithelial cuff
Question 2
Question
Which of the following are required for interosseous tooth eruption?
Answer
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Intact dental follicle
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Periodontal ligament
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inflammatory cytokines
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Intact dental follicle and periodontal ligament
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All of the things
Question 3
Question
Pre-erruptive movements include
Answer
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mesially, distally, occlusaly
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distally, occlusally, labially
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distally occlusally, lingually
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mesially, lingually, occlusally
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labially, lingually, occlusally
Question 4
Question
Which of the following is incorrect about permanent teeth?
Answer
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incisors develop and erupt lingual to the deciduous tooth
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canines develop and erupt lingual to the deciduous tooth
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premolars develop and erupt between roots of deciduous molars
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maxillary molars start with a mesial inclination, mandibular with a distal inclination
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none of the above
Question 5
Question
Post-eruptive tooth movement includes...
Answer
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Occlusal wear compensation via PDL fibroblast activity
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Tipping which can lead to collapse of bite
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Accommodation for vertical jaw growth and apical alveolar bone growth
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Compensation at interproximal contacts which causes tendency towards midline movement
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all of the choices
Question 6
Question
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?
Answer
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bone growth
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root growth
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vascular pressure
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ligament traction
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tissue suction
Question 7
Question
Why is the root growth theory discredited?
Answer
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The root is formed before the tooth erupts
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If root and alveolar bone make contact, bone will be resorbed
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The root is never in contact with the floor of the alveolus
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resorption and contact
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all
Question 8
Question
Active eruption of a primary tooth involves all of the following except?
Answer
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formation of anatomical REE becomes primary junctional epithelium
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formation and organization of PDL
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bone resorption and remodelling
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enzymatic removal of soft tissues over the crown
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degradation of gubernacular cord
Question 9
Question
Which of the following causes monocytes to fuse and become osteoclasts?
Answer
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EGB
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TGF-B1
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CSF-1
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IL-1
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IL-2
Question 10
Question
Which of the following attracts monocytes and macrophages during tooth eruption?
Answer
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EGF
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TGF-B1
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CSF-1
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IL-1
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IL-2
Question 11
Question
If there is no succedaneous tooth following a deciduous tooth, what happens?
Answer
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It will never be shed
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It will shed and leave a hole for the non-existent tooth behind.
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It could shed at some other time
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It will shed as normal
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The tooth fairy will magically transform it into a succedaneous tooth
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