AAPD QE Board Exam
What layer do neural crest cells develop from? - ✔✔Ectoderm
At what embryonic age does the dental lamina begin to develop? - ✔✔6 weeks
What are the three components of the tooth bud? - ✔✔Enamel Orga
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AAPD QE Board Exam
What layer do neural crest cells develop from? - ✔✔Ectoderm
At what embryonic age does the dental lamina begin to develop? - ✔✔6 weeks
What are the three components of the tooth bud? - ✔✔Enamel Organ
Dental papilla
Dental sac
What are the three morphologic stages of a developing tooth bud? - ✔✔Bud stage
Cap stage
Bell stage
During the bell stage invagination of the epithelium occurs, which layer is essential for enamel
production? - ✔✔Stratum intermedium
Which cells does the stellate reticulum support and protect? - ✔✔Ameloblasts
What do remnants of Hertwig's epithelial root sheath persist as? - ✔✔Rests of Malassez
What is the origin of the dental papilla? - ✔✔Neural crest cells
What does the dental papilla differentiate in to? - ✔✔Dentin and primordium of pulp
What are enamel pearls? - ✔✔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? -
✔✔Initiation
Proliferation
Histodifferentiation
Morphodifferentiation
Apposition
Mineralization
Maturation
During which stage of tooth development may problems that lead to anomalies of tooth number
occur? - ✔✔Initiation
Which three stages of tooth development encompasses the bud, cap, early bell and late bell? -
✔✔Proliferation
Histodifferentiation
Morphodifferentiation
Disruptions of proliferation may result in what type of tooth anomalies? (4) - ✔✔Size
Proportion
Numbers
Twinning
Which stage of tooth development may lead to anomalies of the enamel, dentin, and cementum?
- ✔✔Morphodifferentiation
What is the incidence of hyperdontia? Males vs females? - ✔✔0.3 - 3%
Males 2:1 females
Is hyperdontia more common in maxilla or mandible? More common in primary teeth or
permanent teeth? - ✔✔Maxilla 90%
Permanent dentition 5x more common that primary
Which permanent teeth are most frequently missing? List in order from most to least common -
✔✔Third molars
Mandibular second pre molars
Maxillary lateral incisors
Maxillary second pre molars
Name 9 syndromes that may be associated with supernumerary teeth - ✔✔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 - ✔✔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
B. Apert Syndrome
C. Crouzon Syndrome
D. Gardner Syndrome - ✔✔D. Gardner Syndrome
Delayed eruption
Supernum teeth
Osteomas of the jaw
Agensis of third molars is associated with agenesis of which permanent tooth? - ✔✔Maxillary
lateral - either one or both
What is the inheritance pattern for non syndromic hypodontia? - ✔✔Autosomal dominant
Which teeth (from most to least) commonly present as microdontia? - ✔✔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? - ✔✔Geminati
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