AAPD QE Board Exam Questions with Correct Answers

AAPD QE Board Exam Questions & Answers (100% VERIFIED)


Question 1:
What layer do neural crest cells develop from?
Answer:
Ectoderm


Question 2:
At what embryonic age does the dental lamina begin to develop?
Answer:
6 weeks


Question 3:
What are the three components of the tooth bud?
Answer:
Enamel Organ Dental papilla
Dental sac


Question 4:
What are the three morphologic stages of a developing tooth bud?
Answer:
Bud stage Cap stage
Bell stage


Question 5:
During the bell stage invagination of the epithelium occurs, which layer is essential for enamel
production?
Answer:
Stratum intermedium


Question 6:
Which cells does the stellate reticulum support and protect?
Answer:
Ameloblasts


Question 7:
What do remnants of Hertwig's epithelial root sheath persist as?
Answer:
Rests of Malassez

,Question 8:
What is the origin of the dental papilla?
Answer:
Neural crest cells


Question 9:
What does the dental papilla differentiate in to?
Answer:
Dentin and primordium of pulp


Question 10:
What are enamel pearls?
Answer:
Cells of epithelial root sheath that remain attached to dentin. Differentiate into ameloblasts and produce
enamel


Question 11:
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?
Answer:
Initiation


Question 12:
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)
Answer:
Size Proportion
Numbers
Twinning


Question 13:
Which stage of tooth development may lead to anomalies of the enamel, dentin, and cementum?
Answer:
Morphodifferentiation


Question 14:
What is the incidence of hyperdontia? Males vs females?
Answer:
0.3 - 3% Males 2:1 females

,Question 15:
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


Question 16:
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
Answer:
Apert Cleidocranial dysplasia
Gardner syndrome Crouzon syndrome Sturge Weber syndrome
Orofacialdigital Syndrome I Hallermann-Strieff Syndrome - A Cleft lip and palate
Down syndrome


Question 17:
Which syndrome is associated with shovel shaped incisors?
Sturge Weber Syndrome
Cleidocranial dysplasia
Apert syndrome
Hallermann Strieff Syndrome-A
Answer:
C. Apert Syndrome
Narrow high palate Cleft of soft palate
Delayed or ectopic eruption Shovel shaped incisors
Hypoplastic midface


Question 18:
Which syndrome is associated with osteomas of the jaw?
Orofiaciodigital Syndrome I
Apert Syndrome
Crouzon Syndrome
Gardner Syndrome
Answer:
D. Gardner Syndrome
Delayed eruption Supernum teeth Osteomas of the jaw


Question 19:
Agensis of third molars is associated with agenesis of which permanent tooth?
Answer:
Maxillary lateral - either one or both

, Question 20:
What is the inheritance pattern for non syndromic hypodontia?
Answer:
Autosomal dominant


Question 21:
Which teeth (from most to least) commonly present as microdontia?
Answer:
Lateral incisors Second pre molars
Third molars


Question 22:
Which tooth anomaly is characterized by: abortive attempt by single tooth to divide; bifid crown with
single root and pulp chamber?
Answer:
Gemination


Question 23:
Which tooth anomaly is characterized by: complete cleavage of single bud results in supernum mirror
image tooth?
Answer:
Twinning


Question 24:
Which race is fusion of teeth most commonly seen?
Answer:
Japenese (5%)


Question 25:
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


Question 26:
Which tooth anomaly is characterized by fusion after root formation is completed? What is a common
cause?
Answer:
Concresence
Etiology: trauma