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AAPD QE Board Exam Questions And
Answers 100% Pass
What layer do neural crest cells develop from? - answer✔Ectoderm
At what embryonic age does the dental lamina begin to develop? - answer✔6 weeks
What are the three components of the tooth bud? - answer✔Enamel Organ
Dental papilla
Dental sac
What are the three morphologic stages of a developing tooth bud? - answer✔Bud stage
Cap stage
Bell stage
During the bell stage invagination of the epithelium occurs, which layer is essential for enamel
production? - answer✔Stratum intermedium
Which cells does the stellate reticulum support and protect? - answer✔Ameloblasts
What do remnants of Hertwig's epithelial root sheath persist as? - answer✔Rests of Malassez
What is the origin of the dental papilla? - answer✔Neural crest cells
What does the dental papilla differentiate in to? - answer✔Dentin and primordium of pulp
What are enamel pearls? - answer✔Cells of epithelial root sheath that remain attached to
dentin. Differentiate into ameloblasts and produce enamel
What are the 7 steps (in order) of histophyisological differentiation of a tooth bud? -
answer✔Initiation
Proliferation
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Histodifferentiation
Morphodifferentiation
Apposition
Mineralization
Maturation
During which stage of tooth development may problems that lead to anomalies of tooth
number occur? - answer✔Initiation
Which three stages of tooth development encompasses the bud, cap, early bell and late bell? -
answer✔Proliferation
Histodifferentiation
Morphodifferentiation
Disruptions of proliferation may result in what type of tooth anomalies? (4) - answer✔Size
Proportion
Numbers
Twinning
Which stage of tooth development may lead to anomalies of the enamel, dentin, and
cementum? - answer✔Morphodifferentiation
What is the incidence of hyperdontia? Males vs females? - answer✔0.3 - 3%
Males 2:1 females
Is hyperdontia more common in maxilla or mandible? More common in primary teeth or
permanent teeth? - answer✔Maxilla 90%
Permanent dentition 5x more common that primary
Which permanent teeth are most frequently missing? List in order from most to least common -
answer✔Third molars
Mandibular second pre molars
Maxillary lateral incisors
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Maxillary second pre molars
Name 9 syndromes that may be associated with supernumerary teeth - answer✔Apert
Cleidocranial dysplasia
Gardner syndrome
Crouzon syndrome
Sturge Weber syndrome
Orofacialdigital Syndrome I
Hallermann-Strieff Syndrome - A
Cleft lip and palate
Down syndrome
Which syndrome is associated with shovel shaped incisors?
A. Sturge Weber Syndrome
B. Cleidocranial dysplasia
C. Apert syndrome
D. Hallermann Strieff Syndrome-A - answer✔C. Apert Syndrome
Narrow high palate
Cleft of soft palate
Delayed or ectopic eruption
Shovel shaped incisors
Hypoplastic midface
Which syndrome is associated with osteomas of the jaw?
A. Orofiaciodigital Syndrome I
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B. Apert Syndrome
C. Crouzon Syndrome
D. Gardner Syndrome - answer✔D. Gardner Syndrome
Delayed eruption
Supernum teeth
Osteomas of the jaw
Agensis of third molars is associated with agenesis of which permanent tooth? -
answer✔Maxillary lateral - either one or both
What is the inheritance pattern for non syndromic hypodontia? - answer✔Autosomal dominant
Which teeth (from most to least) commonly present as microdontia? - answer✔Lateral incisors
Second pre molars
Third molars
Which tooth anomaly is characterized by: abortive attempt by single tooth to divide; bifid
crown with single root and pulp chamber? - answer✔Gemination
Which tooth anomaly is characterized by: complete cleavage of single bud results in supernum
mirror image tooth? - answer✔Twinning
Which race is fusion of teeth most commonly seen? - answer✔Japenese (5%)
Which tooth anomaly is characterized by: dental union of 2 embryologically developing teeth
two separate pulp chambers; separate or fused canals appear as large bifid crown with one
chamber; dentin is always confluent? - answer✔Fusion
Which tooth anomaly is characterized by fusion after root formation is completed? What is a
common cause? - answer✔Concresence
Etiology: trauma
What class drug is chloral hydrate? - answer✔Non-barbituate