Deck 16: Abnormalities of Teeth

Question 1

Tooth extraction is made more difficult by all the following except:

A) Paget's disease
B) Pulp stones
C) Dilaceration
D) Concrescence
E) Albers-Schonberg disease

Answer 1

Pulp stones

Question 2

Poorly formed "shells" of teeth are seen in which of the following?

A) Dentin dysplasia
B) Hypophosphatasia
C) Regional odontodysplasia
D) Cleidocranial dysplasia
E) None of the above

Answer 2

Regional odontodysplasia

Question 3

Premature deciduous tooth loss may occur in association with all the following except:

A) Amelogenesis imperfecta
B) Hyperthyroidism
C) Burkitt's lymphoma
D) Langerhans cell disease

Answer 3

Amelogenesis imperfecta

Question 4

Aplasia of secondary skin structures, partial anodontia, and xerostomia are features of:

A) Cleidocranial dysplasia
B) Ectodermal dysplasia
C) Amelogenesis imperfecta
D) Nevoid basal cell carcinoma syndrome
E) Osteogenesis imperfecta

Question 5

Which of the following is typically associated with pulpitis and periapical inflammation following wear of a supernumerary cusp?

A) Amelogenesis imperfecta
B) Regional odontodysplasia
C) Turner's tooth
D) Dens evaginatus
E) Dens invaginatus

Question 6

Congenital anodontia (partial or complete) is a feature of which of the following?

A) Hereditary ectodermal dysplasia
B) Dentin dysplasia
C) Gardner's syndrome
D) Cleidocranial dysplasia (dysostosis)
E) None of the above

Question 7

Two brothers present with yellow teeth (entire dentition) and diastemas. Radiographically, dentin appears normal. Their father has a similar condition. This is most likely which of the following?

A) Amelogenesis imperfecta
B) Dentinogenesis imperfecta
C) Environmental hypoplasia
D) Fluorosis
E) Regional odontodysplasia

Question 8

A 7-year-old patient presents with a quadrant of teeth showing abnormal formation of both enamel and dentin. All his other teeth appear clinically normal. Radiographically, the affected teeth can be described as "ghost teeth." He has:

A) Regional odontodysplasia
B) Dens evaginatus
C) Dentin dysplasia
D) Ectodermal dysplasia
E) Cleidocranial dysplasia

Question 9

The mesiodens:

A) Probably occurs as a result of continued proliferation of the dental lamina
B) Is the most common supernumerary tooth
C) Most commonly occurs in the midline of the maxilla
D) May also be a microdont
E) All the above

Question 10

Dens invaginatus:

A) Probably occurs as a result of continued proliferation of the dental lamina
B) Is a common lesion of third molars
C) Is always a supernumerary tooth
D) Cannot be detected radiographically
E) None of the above

Question 11

The phenomenon of a single tooth germ attempting to make two teeth is known as:

A) Concrescence
B) Fusion
C) Gemination
D) Ankylosis
E) None of the above

Question 12

Enamel hypoplasia can result from which of the following?

A) Congenital syphilis
B) Nutritional deficiencies in utero or in childhood
C) Exanthematous diseases of childhood such as varicella
D) Fluoride in drinking water at levels greater than 1 ppm
E) All the above

Question 13

A 16-year-old boy presents with yellow, severely abraded teeth (entire dentition). Radiographs show teeth with opacified pulps and short roots. The patient has no pain, and no periapical lesions are present. This patient has which of the following?

A) Dentin dysplasia
B) Dentinogenesis imperfecta
C) Amelogenesis imperfecta
D) Taurodontism
E) Regional odontodysplasia

Question 14

The dental phenomenon in which teeth show elongated crowns and pulp chambers are enlarged in apical-occlusal height is known as:

A) Supernumerary teeth
B) Regional odontodysplasia
C) Taurodontism
D) Dens evaginatus
E) Dens invaginatus

Question 15

All the following are correct relative to amelogenesis imperfecta except:

A) Caused by environmental factors
B) Affects all teeth
C) Usually treated for cosmetic purposes
D) Pulp chambers are unaffected
E) Dentin is unaffected

Question 16

Periapical lesions (cysts and granulomas) are found in a patient with teeth that show nearly obliterated pulps and short spiky roots. Teeth exhibit normal clinical color. This patient probably has:

A) Dentin dysplasia
B) Dentinogenesis imperfecta
C) Amelogenesis imperfecta
D) Regional odontodysplasia
E) Fluorosis

Question 17

The phenomenon of fusion of cementum of two or more teeth is known as:

A) Fusion
B) Concrescence
C) Taurodontism
D) Ankylosis
E) None of the above