and answers Newest RATED A+ 100% PASS
What layer do neural crest cells develop from? - Correct Answers Ectoderm
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II! At what embryonic age does the dental lamina begin to develop? - Correct Answers 6 weeks
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II! What are the three components of the tooth bud? - Correct Answers Enamel Organ
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
Dental papilla II!
Dental sac II!
II! What are the three morphologic stages of a developing tooth bud? - Correct Answers Bud stage
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Cap stage II!
Bell stage II!
II! During the bell stage invagination of the epithelium occurs, which layer is essential for enamel
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II! production? - Correct Answers Stratum intermedium II! II! II! II! II! II! II! II! II!
II! Which cells does the stellate reticulum support and protect? - Correct Answers Ameloblasts
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II! What do remnants of Hertwig's epithelial root sheath persist as? - Correct Answers Rests of
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II! Malassez
II! What is the origin of the dental papilla? - Correct Answers Neural crest cells
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,II! What does the dental papilla differentiate in to? - Correct Answers Dentin and primordium of
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II! pulp
II! What are enamel pearls? - Correct Answers Cells of epithelial root sheath that remain attached
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II! to dentin. Differentiate into ameloblasts and produce enamel
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II! What are the 7 steps (in order) of histophyisological differentiation of a tooth bud? - Correct
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II! Answers Initiation II! II! II! II! II!
Proliferation
Histodifferentiation II!
Morphodifferentiation II!
Apposition II!
Mineralization II!
Maturation
II! During which stage of tooth development may problems that lead to anomalies of tooth number
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II! occur? - Correct Answers Initiation
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II! Which three stages of tooth development encompasses the bud, cap, early bell and late bell? -
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II! Correct Answers Proliferation
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Histodifferentiation II!
Morphodifferentiation
II! Disruptions of proliferation may result in what type of tooth anomalies? (4) - Correct Answers
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II! Size
Proportion II!
Numbers
Twinning
,II! Which stage of tooth development may lead to anomalies of the enamel, dentin, and
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II! cementum? - Correct Answers Morphodifferentiation II! II! II! II! II! II! II! II!
II! What is the incidence of hyperdontia? Males vs females? - Correct Answers 0.3 - 3%
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Males 2:1 females II! II!
II! Is hyperdontia more common in maxilla or mandible? More common in primary teeth or
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II! permanent teeth? - Correct Answers Maxilla 90% II! II! II! II! II! II! II! II! II! II! II!
Permanent dentition 5x more common that primary II! II! II! II! II! II!
II! Which permanent teeth are most frequently missing? List in order from most to least common -
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II! Correct Answers Third molars II! II! II! II! II! II! II!
Mandibular second pre molars II! II! II! II!
Maxillary lateral incisors II! II! II!
Maxillary second pre molars II! II! II!
II! Name 9 syndromes that may be associated with supernumerary teeth - Correct Answers Apert
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
Cleidocranial dysplasia II! II!
Gardner syndrome II! II!
Crouzon syndrome II!
Sturge Weber syndrome II! II! II!
Orofacialdigital Syndrome I II! II! II!
Hallermann-Strieff Syndrome - A II! II! II!
Cleft lip and palate
II! II! II! II!
Down syndrome II!
, II! Which syndrome is associated with shovel shaped incisors?
II! II! II! II! II! II! II! II!
A. Sturge Weber Syndrome
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B. Cleidocranial dysplasia
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C. Apert syndrome
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D. Hallermann Strieff Syndrome-A - Correct Answers C. Apert Syndrome
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Narrow high palate II! II! II!
Cleft of soft palate II! II! II!
Delayed or ectopic eruption II! II! II! II!
Shovel shaped incisors II! II! II!
Hypoplastic midface II!
II! Which syndrome is associated with osteomas of the jaw?
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A. Orofiaciodigital Syndrome I
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B. Apert Syndrome
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C. Crouzon Syndrome
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D. Gardner Syndrome - Correct Answers D. Gardner Syndrome
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Delayed eruption II! II!
Supernum teeth II! II!
Osteomas of the jaw II! II! II!
II! Agensis of third molars is associated with agenesis of which permanent tooth? - Correct Answers
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Maxillary lateral - either one or both
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