5172129
Question 1
Question
Which is the correct order?
Answer
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Bud, cap, placode, bell, root
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bud, bell, cap, root, placode
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placode, bud, cap, bell, root
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placode, cap, bud, bell, root
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bud, placode, cap, bell, root
Question 2
Question
Which of the following is correct about the primary epithelial band
Answer
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Thickening of the oral epithelium seen at 7th week
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Tooth formation is limited mesiodistally
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Becomes dental lamina upon invasion of the ectomesenchyme
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becomes lamina and thickens at 7th week
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all of the things
Question 3
Question
Which of the following is incorrect?
Answer
-
The primary epithelial band forms both the dental and vestibular lamina
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The dental lamina comes from the dental placode
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There are 16 dental placodes per arch
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Thickening at the primary epithelial band indicates formation of future teeth
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SHH and PITX2 are expressed in the primary epithelial band
Question 4
Question
During the cap stage, which of the following occurs?
Answer
-
Positively charged proteoglycans are formed to attract water
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Lots of mitosis for formation of cervical loop
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Epithelial cells form outer enamel
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proteoglycans and mitosis
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proteoglycans and enamel
Question 5
Question
Which of the following is incorrectly matched?
Answer
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enamel organ... cell rest of Malassez
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dental papilla... pulp tissue
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dental follicle... periodontal ligament
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dental papilla... junctional epithelium
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dental follicle... alveolar bone
Question 6
Question
Which of the following is incorrect?
Answer
-
Enamel pearls can form during the late bell stage
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Enamel knots do not divide and are organizing centers for cusp formation
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The major protein of dentin is type 3 collagen
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All of the above
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Type 3 collagen and enamel knots
Question 7
Question
All succedaneous teeth form from lingual extensions of the dental lamina. Molars also develop from lingual extensions of the dental lamina
Answer
-
Both true
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True, False
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False, True
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Both false
Question 8
Question
Which of the following is false?
Answer
-
Some of the cervical loop cells form cell rests of Malassez
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The periodontal ligament is a special ligament made from epithelial cells
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Some Hertwig's epithelial root sheath cells become epithelial cell rests of Malassez
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None of the above
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Epithelial-mesenchymal interactions induce dentinogenesis, root morphogenesis, and cementum formation
Question 9
Question
Mo SHH, mo cusps? Insulin-like growth factor is associated with Hertwig's epithelial root sheath?
Answer
-
Both true
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True, false
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False, true
-
Both false
Question 10
Question
FGF4 is involved in Hertwig's epithelial root sheath formation. FGF10 is involved in cusp formation
Answer
-
Both true
-
True, false
-
False, true
-
Both false
Question 11
Question
According to the Homeobox Code Theory, BMP4 and FGF 8/9 ratios determine tooth type. Anterior-posterior axis set by PMP4 posteriorly and FGF 8/9 anteriorly.
Answer
-
Both true
-
True, false
-
False, true
-
Both false
Question 12
Question
In homeobox theory, signaling molecules determine tooth type and axis within primary epithelial band. Clone theory states that clones give inhibitory signals to stop formation of additional teeth
Answer
-
Both true
-
True, false
-
False, true
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Both false
Question 13
Question
Which of the following is incorrectly matched?
Answer
-
Dental follicle...osteoblasts
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Dental papilla... odontoblasts
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Enamel organ... cementoblasts
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Dental follicle... fibroblasts
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