AAPD QE Board Exam Questions And
Complete Answers
\.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
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
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
B. Apert Syndrome
C. Crouzon Syndrome
D. Gardner Syndrome - Answer- D. Gardner Syndrome
Delayed eruption
Supernum teeth
Osteomas of the jaw
Complete Answers
\.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
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
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
B. Apert Syndrome
C. Crouzon Syndrome
D. Gardner Syndrome - Answer- D. Gardner Syndrome
Delayed eruption
Supernum teeth
Osteomas of the jaw
