What layer do neural crest cells develop from?
ANSWER: : Ectoderm
Quiz At what embryonic age does the dental lamina begin to develop?
ANSWER: : 6 weeks
Quiz What are the three components of the tooth bud?
ANSWER: : Enamel Organ
Dental papilla
Dental sac
Quiz What are the three morphologic stages of a developing tooth bud?
ANSWER: : Bud stage
,Cap stage
Bell stage
Quiz During the bell stage invagination of the epithelium occurs, which layer is essential for enamel
production?
ANSWER: : Stratum intermedium
Quiz Which cells does the stellate reticulum support and protect?
ANSWER: : Ameloblasts
Quiz What do remnants of Hertwig's epithelial root sheath persist as?
ANSWER: : Rests of Malassez
Quiz What is the origin of the dental papilla?
ANSWER: : Neural crest cells
Quiz What does the dental papilla differentiate in to?
ANSWER: : Dentin and primordium of pulp
Quiz What are enamel pearls?
,ANSWER: : Cells of epithelial root sheath that remain attached to dentin. Differentiate into ameloblasts
and produce enamel
Quiz What are the 7 steps (in order) of histophyisological differentiation of a tooth bud?
ANSWER: : Initiation
Proliferation
Histodifferentiation
Morphodifferentiation
Apposition
Mineralization
Maturation
Quiz During which stage of tooth development may problems that lead to anomalies of tooth number
occur?
ANSWER: : Initiation
Quiz Which three stages of tooth development encompasses the bud, cap, early bell and late bell?
ANSWER: : Proliferation
Histodifferentiation
Morphodifferentiation
Quiz Disruptions of proliferation may result in what type of tooth anomalies? (4)
, ANSWER: : Size
Proportion
Numbers
Twinning
Quiz Which stage of tooth development may lead to anomalies of the enamel, dentin, and cementum?
ANSWER: : Morphodifferentiation
Quiz What is the incidence of hyperdontia? Males vs females?
ANSWER: : 0.3 - 3%
Males 2:1 females
Quiz 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
Quiz 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
ANSWER: : Ectoderm
Quiz At what embryonic age does the dental lamina begin to develop?
ANSWER: : 6 weeks
Quiz What are the three components of the tooth bud?
ANSWER: : Enamel Organ
Dental papilla
Dental sac
Quiz What are the three morphologic stages of a developing tooth bud?
ANSWER: : Bud stage
,Cap stage
Bell stage
Quiz During the bell stage invagination of the epithelium occurs, which layer is essential for enamel
production?
ANSWER: : Stratum intermedium
Quiz Which cells does the stellate reticulum support and protect?
ANSWER: : Ameloblasts
Quiz What do remnants of Hertwig's epithelial root sheath persist as?
ANSWER: : Rests of Malassez
Quiz What is the origin of the dental papilla?
ANSWER: : Neural crest cells
Quiz What does the dental papilla differentiate in to?
ANSWER: : Dentin and primordium of pulp
Quiz What are enamel pearls?
,ANSWER: : Cells of epithelial root sheath that remain attached to dentin. Differentiate into ameloblasts
and produce enamel
Quiz What are the 7 steps (in order) of histophyisological differentiation of a tooth bud?
ANSWER: : Initiation
Proliferation
Histodifferentiation
Morphodifferentiation
Apposition
Mineralization
Maturation
Quiz During which stage of tooth development may problems that lead to anomalies of tooth number
occur?
ANSWER: : Initiation
Quiz Which three stages of tooth development encompasses the bud, cap, early bell and late bell?
ANSWER: : Proliferation
Histodifferentiation
Morphodifferentiation
Quiz Disruptions of proliferation may result in what type of tooth anomalies? (4)
, ANSWER: : Size
Proportion
Numbers
Twinning
Quiz Which stage of tooth development may lead to anomalies of the enamel, dentin, and cementum?
ANSWER: : Morphodifferentiation
Quiz What is the incidence of hyperdontia? Males vs females?
ANSWER: : 0.3 - 3%
Males 2:1 females
Quiz 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
Quiz 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
