Question 1

Tooth extraction is made more difficult by all the following except:&#10;A) Paget's disease&#10;B) Pulp stones&#10;C) Dilaceration&#10;D) Concrescence&#10;E) Albers-Schonberg disease

Accepted Answer

Pulp stones are calcifications within the dental pulp, which do not make tooth extraction more difficult. They primarily affect the internal aspect of the tooth rather than impacting the ease of extraction. Other options listed can complicate tooth extraction due to changes in bone density or tooth morphology.

Question 2

Poorly formed &#34;shells&#34; of teeth are seen in which of the following?&#10;A) Dentin dysplasia&#10;B) Hypophosphatasia&#10;C) Regional odontodysplasia&#10;D) Cleidocranial dysplasia&#10;E) None of the above

Accepted Answer

Regional odontodysplasia is characterized by the development of poorly formed dental tissues, including enamel, dentin, and pulp, leading to "ghost teeth" with very thin and poorly mineralized shells.

Question 3

Premature deciduous tooth loss may occur in association with all the following except:&#10;A) Amelogenesis imperfecta&#10;B) Hyperthyroidism&#10;C) Burkitt's lymphoma&#10;D) Langerhans cell disease

Accepted Answer

Amelogenesis imperfecta primarily affects the enamel formation and does not directly cause premature loss of deciduous teeth.

Question 4

Aplasia of secondary skin structures, partial anodontia, and xerostomia are features of:&#10;A) Cleidocranial dysplasia&#10;B) Ectodermal dysplasia&#10;C) Amelogenesis imperfecta&#10;D) Nevoid basal cell carcinoma syndrome&#10;E) Osteogenesis imperfecta

Accepted Answer

Ectodermal dysplasia is characterized by abnormalities in the development of ectodermal structures, including the skin, teeth, and salivary glands, which leads to symptoms such as aplasia of secondary skin structures, partial anodontia, and xerostomia.

Question 5

Which of the following is typically associated with pulpitis and periapical inflammation following wear of a supernumerary cusp?&#10;A) Amelogenesis imperfecta&#10;B) Regional odontodysplasia&#10;C) Turner's tooth&#10;D) Dens evaginatus&#10;E) Dens invaginatus

Accepted Answer

Dens evaginatus is a dental condition characterized by the presence of an extra cusp, known as a supernumerary cusp, which can lead to pulpitis and periapical inflammation due to wear or fracture of the cusp.

Question 6

Congenital anodontia (partial or complete) is a feature of which of the following?&#10;A) Hereditary ectodermal dysplasia&#10;B) Dentin dysplasia&#10;C) Gardner's syndrome&#10;D) Cleidocranial dysplasia (dysostosis)&#10;E) None of the above

Accepted Answer

Congenital anodontia, which is the absence of teeth, is a feature of hereditary ectodermal dysplasia, a genetic disorder affecting the development of ectodermal tissues, including teeth.

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?&#10;A) Amelogenesis imperfecta&#10;B) Dentinogenesis imperfecta&#10;C) Environmental hypoplasia&#10;D) Fluorosis&#10;E) Regional odontodysplasia

Accepted Answer

Amelogenesis imperfecta is a condition affecting the enamel of the teeth, leading to discoloration (such as yellow teeth) and potential spacing issues (diastemas). The fact that dentin appears normal radiographically and the condition is present in family members suggests a genetic component, aligning with amelogenesis imperfecta, which is inherited.

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

Accepted Answer

Regional odontodysplasia is characterized by abnormal development of both enamel and dentin in a localized area, leading to teeth that appear radiographically as "ghost teeth." This condition typically affects only a quadrant or a few teeth, distinguishing it from the other options listed.

Question 9

The mesiodens:&#10;A) Probably occurs as a result of continued proliferation of the dental lamina&#10;B) Is the most common supernumerary tooth&#10;C) Most commonly occurs in the midline of the maxilla&#10;D) May also be a microdont&#10;E) All the above

Accepted Answer

The mesiodens is indeed a result of continued proliferation of the dental lamina, is the most common supernumerary tooth, most commonly occurs in the midline of the maxilla, and can also be a microdont.

Question 10

Dens invaginatus:&#10;A) Probably occurs as a result of continued proliferation of the dental lamina&#10;B) Is a common lesion of third molars&#10;C) Is always a supernumerary tooth&#10;D) Cannot be detected radiographically&#10;E) None of the above

Accepted Answer

Dens invaginatus is a developmental anomaly resulting from invagination in the surface of the tooth crown or root before calcification has occurred. It is not specifically due to continued proliferation of the dental lamina, nor is it commonly associated with third molars or always a supernumerary tooth. It can indeed be detected radiographically, making all the provided specific statements incorrect.

Question 11

The phenomenon of a single tooth germ attempting to make two teeth is known as:&#10;A) Concrescence&#10;B) Fusion&#10;C) Gemination&#10;D) Ankylosis&#10;E) None of the above

Accepted Answer

The answer of The phenomenon of a single tooth germ...

Question 12

Enamel hypoplasia can result from which of the following?&#10;A) Congenital syphilis&#10;B) Nutritional deficiencies in utero or in childhood&#10;C) Exanthematous diseases of childhood such as varicella&#10;D) Fluoride in drinking water at levels greater than 1 ppm&#10;E) All the above

Accepted Answer

The answer of Enamel hypoplasia can result from which of...

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

Accepted Answer

The answer of A 16-year-old boy presents with yellow, severely...

Question 14

The dental phenomenon in which teeth show elongated crowns and pulp chambers are enlarged in apical-occlusal height is known as:&#10;A) Supernumerary teeth&#10;B) Regional odontodysplasia&#10;C) Taurodontism&#10;D) Dens evaginatus&#10;E) Dens invaginatus

Accepted Answer

The answer of The dental phenomenon in which teeth show...

Question 15

All the following are correct relative to amelogenesis imperfecta except:&#10;A) Caused by environmental factors&#10;B) Affects all teeth&#10;C) Usually treated for cosmetic purposes&#10;D) Pulp chambers are unaffected&#10;E) Dentin is unaffected

Accepted Answer

The answer of All the following are correct relative to...

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:&#10;A) Dentin dysplasia&#10;B) Dentinogenesis imperfecta&#10;C) Amelogenesis imperfecta&#10;D) Regional odontodysplasia&#10;E) Fluorosis

Accepted Answer

The answer of Periapical lesions (cysts and granulomas) are found...

Question 17

The phenomenon of fusion of cementum of two or more teeth is known as:&#10;A) Fusion&#10;B) Concrescence&#10;C) Taurodontism&#10;D) Ankylosis&#10;E) None of the above

Accepted Answer

The answer of The phenomenon of fusion of cementum of...

Deck 16: Abnormalities of Teeth