regressive change of oral cavity

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Oral pathology

1. Which of the following surfaces do not show attrition?

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(a) Occlusal

(b) Proximal

(d) Incisal

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2. The exposure of dentinal tubules and resultant irritation of odontoblastic processes leads to formation of

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(a) Polished facet on tooth surface affected by attrition

(b) Sclerotic dentin

(d) Predentin

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3. All except _______________ are common causes of attrition.

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(a) Abrasive dentifrices

(b) Habitual biting of bobby pins

(d) Vertical toothbrushing habit

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4. Erosion is defined as irreversible loss of tooth substance by a chemical process that does not involve

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(a) Bacteria

(b) Virus

(d) Tissue fluid

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5. All of the following except _____ are etiological factors of erosion.

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(a) Faulty toothbrushing habit

(b) Acidic beverages

(d) Regurgitated gastric acid

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6. Chronic excessive vomiting has long been recognized as a cause of

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(a) Abrasion

(b) Abfraction

(d) Erosion

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7. Sclerosis of primary dentin is characterized by _____ of dentinal tubules.

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(a) Exposure

(b) Calcification

(d) Wearing away

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8. The dentin that is laid down around the pulp chamber as a result of a normal aging process is referred to as

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(a) Tertiary dentin

(b) Interglobular dentin

(d) Physiologic secondary dentin

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9. Which one of the following statements is incorrect regarding tertiary/reparative secondary dentin?

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(a) It is an age-related phenomenon

(b) It forms as a result of irritation of odontoblasts

(d) Number of dentinal tubules per unit area is less and more irregularly arranged compared to primary dentin

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10. Reticular atrophy of pulp is characterized by

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(a) Dilated blood vessels

(b) Increased calcific deposits

(d) Infiltration of large number of lymphocytes

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