ABPD QE REVIEW EXAM QUESTIONS
WITH COMPLETE SOLUTIONS
During what stage of tooth development do taurodonts, dens in dente, and dens
evaginatus occur? - ANSWER-Morphodifferentiation
Marfanoid body, narrow facies, full lips
Mucosal neuromas of lips, tongue, buccal mucosa and gingiva
Medullary carcinoma of thyroid
Pheochromocytoma - ANSWER-Multiple endocrine neoplasia type 2B
What are the two most common types of ectodermal dysplasia - ANSWER-Hidrotic
and hypohidrotic
What is the most common inheritance pattern of ectodermal dysplasia?
What is the prevalence of the most common form of ED? - ANSWER-X-linked
recessive
1:100,000
What are the four common characteristic defects of ectodermal dysplasia? -
ANSWER-Hair, sweat glands, teeth, nails
Autosomal recessive disorder
Chronic pulmonary disease
Pancreatic insufficiency
High sweat electrolyte concentrations
Chronic progressive disease - ANSWER-Cystic fibrosis
1/3200 live caucasian births
Abnormal CFTR protein
Increased calclulus with decreased caries
Increased risk for candidiasis
Which syndromes are associated with taurodontism? - ANSWER-Klinefelter
Tricho-dento-osseous syndrome
Mohr syndrome (OFD II)
Ectodermal dysplasia
Down syndrome
Amelogenesis imperfecta type IV
"Ghost teeth"
Localized arrest in tooth development
Cementum normal
Thin enamel
80% involve central incisors
No etiology
No inheritance pattern - ANSWER-Regional odontodysplasia
,Enlarged occipitofrontal circumference
Mild ocular hypertelorism
Multiple basal cell carcinomas
Multiple odontogenic keratocysts
Palmar and plantar pits
Calcified falx cerebri
Spina bifida - ANSWER-Nevoid basal cell carcinoma syndrome
"Gorlin and Goltz"
What embryonic structures give rise to the palate? - ANSWER-Median nasal process
and maxillary processes
Fuse anteriorly and posteriorly from incisive foramen
During which embryonic week does palatal fusion occur? - ANSWER-Week 11
What is the incidence of CL + CP?
CP alone? - ANSWER-1:1000
1:2000
When does lip adhesion occur?
When is surgical lip repair completed in CL patients?
When is the palate repaired in CP patients? - ANSWER-Lip adhesion- 0-3m
Surgical lip repair- 3-6 months
Palate repair- 10-18 months
Poor migration of defective leukocytes
Generalized periodontitis in the primary and young permanent dentitions
Periodontitis refractory to treatment
Frequent respiratory, skin, ear and other soft tissue bacterial infections
Shortened life expectancy - ANSWER-Leukocyte adhesion defect (LAD-1 most
common)
Group of disorders with variable symptoms resulting from abnormal proliferation and
dissemination of histiocytic cells
Bone lesions producing "floating teeth"
Gingival swelling
Peak incidence- ages 1-4 - ANSWER-Langerhans Cell Histiocytosis
Dental lamina remnants found on the crest of the alveolar ridge - ANSWER-Dental
lamina cysts
Trapped epithelial remnants found on the midpalatal raphe - ANSWER-Epstein
pearls
Firm pink to red mass
Arises from alveolar mucosa at birth
Most common site is maxillary lateral and canine region
Females>males
Maxilla>mandible - ANSWER-Congenital epulis of newborn
, Abortive attempt by single tooth to divide; bifid crown with single root and pulp
chamber.
Clinical Dx- extra crown - ANSWER-Gemination
Complete cleavage of single bud results in supernumerary mirror image tooth -
ANSWER-Twinning
More common in primary dentition
Dentinal union of two teeth
Separate pulp chambers
Large bifid crown
Normal complement of crowns - ANSWER-Fusion
Fusion occurs after root formation is complete
Etiology- trauma, crowding - ANSWER-Concresence
Unilateral microtia
Failure of formation of mandibular ramus and condyle
Frequent eye and skeletal involvement
50% have cardiac pathology- VSD, PDA - ANSWER-Hemifacial microsomia
Goldenhar syndrome
Intellectual disability
Shortening of cranial base
Underdeveloped mandible, overdeveloped maxilla
Tongue enlargement, marked crenations
Congenital hypothyroidism - ANSWER-Cretinisim
What is the etiology of taurodontism? - ANSWER-Failure of invagination of Hertwig's
epithelial root sheath
Macroglossia
Sleep apnea
Enlarged abdomen, cytomegaly of adrenal cortex
Postnatal somatic gigantism
Mild microcephaly
Severe hypoglycemia
Neoplasms (nephroblastomas most common) - ANSWER-Beckwith-Wiedemann
Syndrome
Normal crown color
Short blunted roots
"Rootless teeth"
Mulitple periapical granulomas and cysts
PARL in non-carious teeth - ANSWER-Dentin dysplasia type I
"radicular DD"
Amber-colored bulbous crowns
Normal roots
WITH COMPLETE SOLUTIONS
During what stage of tooth development do taurodonts, dens in dente, and dens
evaginatus occur? - ANSWER-Morphodifferentiation
Marfanoid body, narrow facies, full lips
Mucosal neuromas of lips, tongue, buccal mucosa and gingiva
Medullary carcinoma of thyroid
Pheochromocytoma - ANSWER-Multiple endocrine neoplasia type 2B
What are the two most common types of ectodermal dysplasia - ANSWER-Hidrotic
and hypohidrotic
What is the most common inheritance pattern of ectodermal dysplasia?
What is the prevalence of the most common form of ED? - ANSWER-X-linked
recessive
1:100,000
What are the four common characteristic defects of ectodermal dysplasia? -
ANSWER-Hair, sweat glands, teeth, nails
Autosomal recessive disorder
Chronic pulmonary disease
Pancreatic insufficiency
High sweat electrolyte concentrations
Chronic progressive disease - ANSWER-Cystic fibrosis
1/3200 live caucasian births
Abnormal CFTR protein
Increased calclulus with decreased caries
Increased risk for candidiasis
Which syndromes are associated with taurodontism? - ANSWER-Klinefelter
Tricho-dento-osseous syndrome
Mohr syndrome (OFD II)
Ectodermal dysplasia
Down syndrome
Amelogenesis imperfecta type IV
"Ghost teeth"
Localized arrest in tooth development
Cementum normal
Thin enamel
80% involve central incisors
No etiology
No inheritance pattern - ANSWER-Regional odontodysplasia
,Enlarged occipitofrontal circumference
Mild ocular hypertelorism
Multiple basal cell carcinomas
Multiple odontogenic keratocysts
Palmar and plantar pits
Calcified falx cerebri
Spina bifida - ANSWER-Nevoid basal cell carcinoma syndrome
"Gorlin and Goltz"
What embryonic structures give rise to the palate? - ANSWER-Median nasal process
and maxillary processes
Fuse anteriorly and posteriorly from incisive foramen
During which embryonic week does palatal fusion occur? - ANSWER-Week 11
What is the incidence of CL + CP?
CP alone? - ANSWER-1:1000
1:2000
When does lip adhesion occur?
When is surgical lip repair completed in CL patients?
When is the palate repaired in CP patients? - ANSWER-Lip adhesion- 0-3m
Surgical lip repair- 3-6 months
Palate repair- 10-18 months
Poor migration of defective leukocytes
Generalized periodontitis in the primary and young permanent dentitions
Periodontitis refractory to treatment
Frequent respiratory, skin, ear and other soft tissue bacterial infections
Shortened life expectancy - ANSWER-Leukocyte adhesion defect (LAD-1 most
common)
Group of disorders with variable symptoms resulting from abnormal proliferation and
dissemination of histiocytic cells
Bone lesions producing "floating teeth"
Gingival swelling
Peak incidence- ages 1-4 - ANSWER-Langerhans Cell Histiocytosis
Dental lamina remnants found on the crest of the alveolar ridge - ANSWER-Dental
lamina cysts
Trapped epithelial remnants found on the midpalatal raphe - ANSWER-Epstein
pearls
Firm pink to red mass
Arises from alveolar mucosa at birth
Most common site is maxillary lateral and canine region
Females>males
Maxilla>mandible - ANSWER-Congenital epulis of newborn
, Abortive attempt by single tooth to divide; bifid crown with single root and pulp
chamber.
Clinical Dx- extra crown - ANSWER-Gemination
Complete cleavage of single bud results in supernumerary mirror image tooth -
ANSWER-Twinning
More common in primary dentition
Dentinal union of two teeth
Separate pulp chambers
Large bifid crown
Normal complement of crowns - ANSWER-Fusion
Fusion occurs after root formation is complete
Etiology- trauma, crowding - ANSWER-Concresence
Unilateral microtia
Failure of formation of mandibular ramus and condyle
Frequent eye and skeletal involvement
50% have cardiac pathology- VSD, PDA - ANSWER-Hemifacial microsomia
Goldenhar syndrome
Intellectual disability
Shortening of cranial base
Underdeveloped mandible, overdeveloped maxilla
Tongue enlargement, marked crenations
Congenital hypothyroidism - ANSWER-Cretinisim
What is the etiology of taurodontism? - ANSWER-Failure of invagination of Hertwig's
epithelial root sheath
Macroglossia
Sleep apnea
Enlarged abdomen, cytomegaly of adrenal cortex
Postnatal somatic gigantism
Mild microcephaly
Severe hypoglycemia
Neoplasms (nephroblastomas most common) - ANSWER-Beckwith-Wiedemann
Syndrome
Normal crown color
Short blunted roots
"Rootless teeth"
Mulitple periapical granulomas and cysts
PARL in non-carious teeth - ANSWER-Dentin dysplasia type I
"radicular DD"
Amber-colored bulbous crowns
Normal roots
