AAPD QE Board Exam UPDATED ACTUAL Questions and
CORRECT Answers
What layer do neural crest cells develop from? Ectoderm
At what embryonic age does the dental lamina begin to 6 weeks
develop?
What are the three components of the tooth bud? Enamel Organ
Dental papilla
Dental sac
What are the three morphologic stages of a developing Bud stage
tooth bud? Cap stage
Bell stage
During the bell stage invagination of the epithelium Stratum intermedium
occurs, which layer is essential for enamel production?
Which cells does the stellate reticulum support and Ameloblasts
protect?
What do remnants of Hertwig's epithelial root sheath Rests of Malassez
persist as?
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 Initiation
differentiation of a tooth bud? Proliferation
Histodifferentiation
Morphodifferentiation
Apposition
Mineralization
Maturation
During which stage of tooth development may problems Initiation
that lead to anomalies of tooth number occur?
Which three stages of tooth development encompasses Proliferation
the bud, cap, early bell and late bell? Histodifferentiation
Morphodifferentiation
Disruptions of proliferation may result in what type of Size
tooth anomalies? (4) Proportion
Numbers
Twinning
Which stage of tooth development may lead to Morphodifferentiation
anomalies of the enamel, dentin, and cementum?
What is the incidence of hyperdontia? Males vs females? 0.3 - 3%
Males 2:1 females
Is hyperdontia more common in maxilla or mandible? Maxilla 90%
More common in primary teeth or permanent teeth? Permanent dentition 5x more common that primary
Which permanent teeth are most frequently missing? List Third molars
in order from most to least common Mandibular second pre molars
Maxillary lateral incisors
Maxillary second pre molars
Name 9 syndromes that may be associated with Apert
supernumerary teeth 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 C. Apert Syndrome
incisors?
Narrow high palate
A. Sturge Weber Syndrome Cleft of soft palate
B. Cleidocranial dysplasia Delayed or ectopic eruption
C. Apert syndrome Shovel shaped incisors
D. Hallermann Strieff Syndrome-A Hypoplastic midface
CORRECT Answers
What layer do neural crest cells develop from? Ectoderm
At what embryonic age does the dental lamina begin to 6 weeks
develop?
What are the three components of the tooth bud? Enamel Organ
Dental papilla
Dental sac
What are the three morphologic stages of a developing Bud stage
tooth bud? Cap stage
Bell stage
During the bell stage invagination of the epithelium Stratum intermedium
occurs, which layer is essential for enamel production?
Which cells does the stellate reticulum support and Ameloblasts
protect?
What do remnants of Hertwig's epithelial root sheath Rests of Malassez
persist as?
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 Initiation
differentiation of a tooth bud? Proliferation
Histodifferentiation
Morphodifferentiation
Apposition
Mineralization
Maturation
During which stage of tooth development may problems Initiation
that lead to anomalies of tooth number occur?
Which three stages of tooth development encompasses Proliferation
the bud, cap, early bell and late bell? Histodifferentiation
Morphodifferentiation
Disruptions of proliferation may result in what type of Size
tooth anomalies? (4) Proportion
Numbers
Twinning
Which stage of tooth development may lead to Morphodifferentiation
anomalies of the enamel, dentin, and cementum?
What is the incidence of hyperdontia? Males vs females? 0.3 - 3%
Males 2:1 females
Is hyperdontia more common in maxilla or mandible? Maxilla 90%
More common in primary teeth or permanent teeth? Permanent dentition 5x more common that primary
Which permanent teeth are most frequently missing? List Third molars
in order from most to least common Mandibular second pre molars
Maxillary lateral incisors
Maxillary second pre molars
Name 9 syndromes that may be associated with Apert
supernumerary teeth 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 C. Apert Syndrome
incisors?
Narrow high palate
A. Sturge Weber Syndrome Cleft of soft palate
B. Cleidocranial dysplasia Delayed or ectopic eruption
C. Apert syndrome Shovel shaped incisors
D. Hallermann Strieff Syndrome-A Hypoplastic midface
