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ABPD QE Review Questions and Answers
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ABPD QE Review Questions and Answers What is the purpose of the Herbst appliance? To correct skeletal class II malocclusion Displaces the mandible forward with lower dental protraction. Distalizes upper molars and restrains the maxilla Cervical-pull headgear is used for what purpose? ...

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  • September 15, 2024
  • 25
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • abpd qe review questions and answers
  • what is the purpose of the herbst appliance to co
  • cervical pull headgear is used for what purpose o

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ABPD QE Review Questions and
Answers
What is the purpose of the Herbst appliance? - answer To correct skeletal class II
malocclusion

Displaces the mandible forward with lower dental protraction.
Distalizes upper molars and restrains the maxilla

Cervical-pull headgear is used for what purpose? - answer Optimizes molar
distalization and extrusion
Decreases overbite (so avoid with dolichofacial patients)
A point moves 0.5-1mm distal, lower face height increases

High-pull headgear is used for what purpose? - answer Optimizes restraint of
maxillary growth
Minimizes vertical eruptive development
Enhances overbite
Relatively intrudes maxillary molars (so avoid in brachyfacial patients)

When is disking of primary canines indicated?
How much space per side can be achieved? - answer Less than 3-4mm of incisor
crowding, laterals are actively erupting, incisors are lingually malpositioned
1-2mm per side

When is extraction of the primary canines indicated? - answer Incisor liability over
4mm
Distorted incisor positioning
Asymmetric ectopic loss of primary canine

Placement of LLHA strongly recommended

Genetic disorder
Four levels of severity- perinatal, infantile, childhood, adult
Premature loss of deciduous teeth (fully rooted)
Abnormal cementum
Abnormally large pulp chambers
Deficient/defective alkaline phosphatase - answer Hypophosphatasia

Anatomy of primary teeth - answer Thinner enamel and dentin
Larger pulp horns in relation to crown
Pulp horns closer to DEJ (esp. MB)
Enamel rods in gingival third extend in occlusal direction from DEJ

,More prominent cervical constriction
Broader, flatter contact areas
Whiter in color, dentin is lighter
Shallower pits and fissures
More narrow occlusal table

Teeth present at birth?
Teeth present within 30 days of life? - answer Natal teeth
Neonatal teeth

3:1 natal:neonatal

Mucus gland tissue found on buccal and lingual aspects of maxillary alveolar ridge -
answer Bohn's nodules

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

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

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