1
AAPD QE Board Exam Study Guide with
complete solutions| Latest 2025/2026
Update.
What layer do neural crest cells develop from? - (answers)Ectoderm
At what embryonic age does the dental lamina begin to develop? - (answers)6
weeks
What are the three components of the tooth bud? - (answers)Enamel Organ
Dental papilla
Dental sac
What are the three morphologic stages of a developing tooth bud? -
(answers)Bud stage
Cap stage
Bell stage
During the bell stage invagination of the epithelium occurs, which layer is
essential for enamel production? - (answers)Stratum intermedium
Which cells does the stellate reticulum support and protect? -
(answers)Ameloblasts
,2
What do remnants of Hertwig's epithelial root sheath persist as? - (answers)Rests
of Malassez
What is the origin of the dental papilla? - (answers)Neural crest cells
What does the dental papilla differentiate in to? - (answers)Dentin and
primordium of pulp
What are enamel pearls? - (answers)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? - (answers)Initiation
Proliferation
Histodifferentiation
Morphodifferentiation
Apposition
Mineralization
Maturation
During which stage of tooth development may problems that lead to anomalies of
tooth number occur? - (answers)Initiation
,3
Which three stages of tooth development encompasses the bud, cap, early bell
and late bell? - (answers)Proliferation
Histodifferentiation
Morphodifferentiation
Disruptions of proliferation may result in what type of tooth anomalies? (4) -
(answers)Size
Proportion
Numbers
Twinning
Which stage of tooth development may lead to anomalies of the enamel, dentin,
and cementum? - (answers)Morphodifferentiation
What is the incidence of hyperdontia? Males vs females? - (answers)0.3 - 3%
Males 2:1 females
Is hyperdontia more common in maxilla or mandible? More common in primary
teeth or permanent teeth? - (answers)Maxilla 90%
Permanent dentition 5x more common that primary
Which permanent teeth are most frequently missing? List in order from most to
least common - (answers)Third molars
, 4
Mandibular second pre molars
Maxillary lateral incisors
Maxillary second pre molars
Name 9 syndromes that may be associated with supernumerary teeth -
(answers)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 - (answers)C. Apert Syndrome
AAPD QE Board Exam Study Guide with
complete solutions| Latest 2025/2026
Update.
What layer do neural crest cells develop from? - (answers)Ectoderm
At what embryonic age does the dental lamina begin to develop? - (answers)6
weeks
What are the three components of the tooth bud? - (answers)Enamel Organ
Dental papilla
Dental sac
What are the three morphologic stages of a developing tooth bud? -
(answers)Bud stage
Cap stage
Bell stage
During the bell stage invagination of the epithelium occurs, which layer is
essential for enamel production? - (answers)Stratum intermedium
Which cells does the stellate reticulum support and protect? -
(answers)Ameloblasts
,2
What do remnants of Hertwig's epithelial root sheath persist as? - (answers)Rests
of Malassez
What is the origin of the dental papilla? - (answers)Neural crest cells
What does the dental papilla differentiate in to? - (answers)Dentin and
primordium of pulp
What are enamel pearls? - (answers)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? - (answers)Initiation
Proliferation
Histodifferentiation
Morphodifferentiation
Apposition
Mineralization
Maturation
During which stage of tooth development may problems that lead to anomalies of
tooth number occur? - (answers)Initiation
,3
Which three stages of tooth development encompasses the bud, cap, early bell
and late bell? - (answers)Proliferation
Histodifferentiation
Morphodifferentiation
Disruptions of proliferation may result in what type of tooth anomalies? (4) -
(answers)Size
Proportion
Numbers
Twinning
Which stage of tooth development may lead to anomalies of the enamel, dentin,
and cementum? - (answers)Morphodifferentiation
What is the incidence of hyperdontia? Males vs females? - (answers)0.3 - 3%
Males 2:1 females
Is hyperdontia more common in maxilla or mandible? More common in primary
teeth or permanent teeth? - (answers)Maxilla 90%
Permanent dentition 5x more common that primary
Which permanent teeth are most frequently missing? List in order from most to
least common - (answers)Third molars
, 4
Mandibular second pre molars
Maxillary lateral incisors
Maxillary second pre molars
Name 9 syndromes that may be associated with supernumerary teeth -
(answers)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 - (answers)C. Apert Syndrome
