Deck 5: Developmental Disorders

Question 1

Which term describes partial anodontia or the lack of one or more teeth?

A) Anodontia
B) Ankylosed
C) Hypodontia
D) Gemination

Answer 1

Hypodontia

Question 2

This cyst is characterized by its unique histologic appearance and its frequent recurrence rate.

A) Radicular cyst
B) Residual cyst
C) Dentigerous cyst
D) Odontogenic keratocyst

Answer 2

Odontogenic keratocyst

Question 3

The formation of dentin is called:

A) amelogenesis.
B) dentinogenesis.
C) dens in dente.
D) odontogenesis.

Answer 3

dentinogenesis.

Question 4

The body of the tongue develops from the:

A) frontal process.
B) first branchial arch.
C) second branchial arch.
D) third branchial arch.

Question 5

This unilocular radiolucency around the crown of an unerupted second premolar is most likely a:

A) normal developmental sac.
B) dentigerous cyst.
C) primordial cyst.
D) lateral periodontal cyst.

Question 6

This cyst has a strong predilection for females.

A) Lateral periodontal cyst
B) Nasopalatine canal cyst
C) Nasolabial cyst
D) Gingival cyst

Question 7

The lateral periodontal cyst occurs most often on the lateral aspect of a tooth root, which is usually the:

A) mandibular third molar.
B) maxillary premolars.
C) mandibular cuspid/premolars.
D) maxillary anteriors.

Question 8

Odontogenesis in the human embryo occurs at:

A) 3 weeks.
B) 5 weeks.
C) 5 months.
D) 1 month.

Question 9

The most common cyst observed in the oral cavity is caused by pulpal inflammation and is called a/an:

A) dentigerous cyst.
B) eruption cyst.
C) radicular cyst.
D) primordial cyst.

Question 10

This pseudocyst is filled with salivary gland tissue that may be an extension of the sublingual gland.

A) Ranula
B) Static bone cyst
C) Lymphoepithelial cyst
D) Traumatic bone cyst

Question 11

Which epithelial lined tract is a developmental anomaly located in the corners of the mouth?

A) Commissural lip pit
B) Angular cheilitis
C) Fistula
D) Congenital lip pit

Question 12

Which one of the following is not true about the thyroglossal tract cyst?

A) It is found in individuals younger than 20 years.
B) There is no sex predilection.
C) Clinically it is located below the hyoid bone.
D) Conservative nonsurgical treatment is sufficient.

Question 13

Total hypodontia is often associated with a hereditary disturbance called:

A) taurodontism.
B) amelogenesis imperfecta.
C) ectodermal dysplasia.
D) cleidocranial dysplasia.

Question 14

Radiographically this radiolucent cyst is often heart shaped that is caused by the anatomic Y shape of the area.

A) Nasopalatine canal cyst
B) Median palatine cyst
C) Nasolabial cyst
D) Globulomaxillary cyst

Question 15

Which term describes a disorder present at and existing from the time of birth?

A) Anomaly
B) Inherited
C) Congenital
D) Developmental

Question 16

Which one of the following is not considered a pseudocyst?

A) Thyroglossal tract cyst
B) Static bone cyst
C) Simple bone cyst
D) Aneurysmal bone cyst

Question 17

Clinically the lingual thyroid nodule appears as a smooth nodular mass:

A) at the base of the dorsal tongue posterior to the circumvallate papillae.
B) on the anterior ventral tongue.
C) on the lateral borders of the middle third of the tongue.
D) anterior to the circumvallate papillae.

Question 18

Which term defines the joining of two adjacent teeth by cementum only?

A) Twinning
B) Concrescence
C) Cementogenesis
D) Fusion

Question 19

This patient exhibits an extensive adhesion of the tongue to the floor of the mouth caused by the short lingual frenum. You suspect:

A) ankyloglossia.
B) frenectomy.
C) lingual thyroid.
D) total ankyloglossia.

Question 20

The first branchial arch divides into two maxillary processes and the:

A) mandibular process.
B) frontal process.
C) median nasal process.
D) globular process.

Question 21

Impacted teeth cannot erupt because of:

A) lack of eruptive force.
B) physical obstruction.
C) ankylosis.
D) bone pathology.

Question 22

Nonerupted supernumerary teeth should be extracted because of the following risk.

A) Malignant tumor development
B) Cysts around the crowns
C) Internal resorption
D) Condensing osteitis

Question 23

Which one of the following defines a disturbance of the maturation of the enamel matrix?

A) Turner tooth
B) Mulberry molar
C) Premature birth
D) Enamel hypocalcification

Question 24

Multiple supernumerary teeth may be a component of which of the following?

A) Cleidocranial dysplasia
B) Dermoid cyst
C) Syphilis
D) Static bone cyst

Question 25

Which tooth is most commonly affected by dens in dente?

A) Maxillary central
B) Mandibular lateral
C) Maxillary lateral
D) A supernumerary tooth

Question 26

Another name for dens invaginatus is:

A) taurodontism.
B) dens in dente.
C) dens evaginatus.
D) enamel pearl.

Question 27

The pear-shaped radiolucency observed in this radiograph is most likely a:

A) radicular cyst.
B) lateral periodontal cyst.
C) globulomaxillary cyst.
D) nasopalatine canal cyst.

Question 28

For which condition would pulp vitality be nonvital?

A) Radicular cyst
B) Median mandibular cyst
C) Median palatal cyst
D) Periapical cemento-osseous dysplasia

Question 29

The supernumerary tooth in this illustration is called:

A) mesiodens.
B) dilaceration.
C) twinning.
D) gemination.

Question 30

The most common supernumerary tooth is called:

A) distomolar.
B) mesiodens.
C) mulberry molar.
D) Turner tooth.

Question 31

Regional odontodysplasia is:

A) a decrease in radiodensity seen on one or more unerupted teeth in a quadrant.
B) a genetic condition.
C) caused by systemic illness.
D) most often seen in the mandible.

Question 32

The projection of white material seen at the furcation area in this maxillary molar is a developmental anomaly. You suspect

A) dens evaginatus.
B) enamel pearl.
C) supernumerary cusp.
D) calculus.

Question 33

This radiograph clearly shows which developmental anomaly?

A) Dens in dente
B) Periapical (PAP)
C) Caries
D) Open contacts

Question 34

Dens in dente is a developmental anomaly often seen with:

A) extra cusps.
B) a periapical lesion.
C) tuberculated premolars.
D) supernumerary roots.

Question 35

The developmental anomaly seen in this radiograph is:

A) taurodontism.
B) mulberry molar.
C) supernumerary roots on the premolars.
D) dilaceration.

Question 36

Pitting is the most common type of enamel hypoplasia seen in patients who have which condition during tooth development?

A) Febrile illness
B) Drinking water with 2.4 ppm of fluoride during tooth development
C) Congenital syphilis
D) Herpes simplex

Question 37

Ingesting water with four times the amount of fluoride causes:

A) brown-to-black staining.
B) cusp fractures.
C) white spots on the middle third of smooth crowns.
D) increased dental caries.

Question 38

Regional odontodysplasia is also referred to as:

A) hypodontia.
B) ghost teeth.
C) taurodontism.
D) supernumerary teeth.

Question 39

The pseudocyst seen in this radiograph is surrounded by salivary gland tissue. It is a/an:

A) simple bone cyst.
B) Stafne bone cyst.
C) traumatic bone cyst.
D) aneurysmal bone cyst.

Question 40

Enamel hypoplasia is the result of a disturbance of or damage to ameloblasts during enamel matrix formation.Which one of the following would not be a factor?

A) Genetics
B) Ingestion of high concentrations of fluoride during tooth development
C) Vitamin deficiency during tooth development
D) Shingles