MCQs in Endodontics

Chapter 14: Pathobiology

 

1- In acute inflammation, the first cells to pass through the blood vessel walls into the tissue are:

  1. eosinophils.
  2. lymphocytes.
  3. monocytes.
  4. polymorphonuclear neutrophils (PMNs).

 

 

 

 

 

 

The answer is: D

 

2- Following monocyte white cell migration from the vessel to the tissue, the monocyte becomes a:

  1. neutrophil.
  2. basophil.
  3. macrophage.
  4. histiocyte.

 

 

 

 

 

The answer is: C

 

3- In the inflammatory process, which of the following cell types function as phagocytes?

  1. Macrophages and lymphocytes.
  2. Lymphocytes and neutrophils.
  3. Plasma cells and basophils.
  4. Neutrophils and macrophages.

 

 

 

 

 

 

 The answer is: D

 

4- Which of the following results may be expected following surgery when both the buccal and lingual cortical plates have been lost?

  1. Ankylosis.
  2. Scar tissue formation.
  3. Osteosclerosis.
  4. Normal bone regeneration.

 

 

 

 

 

The answer is: B

 

5- A foreign body reaction is characterized by the presence of:

  1. neutrophils.
  2. plasma cells.
  3. giant cells.
  4. fibroblasts.

 

 

 

 

 

The answer is: C

 

6- Acute osteomyelitis is typically characterized by:

  1. a draining sinus tract.
  2. a large diffuse radiolucency.
  3. necrotic bone.
  4. cellulitis.

 

 

 

 

 

The answer is: C

 

7- T lymphocytes arise as immature cells in the:

  1. bone marrow.
  2. thymus.
  3. lymph nodes.
  4. inflammatory lesion.

 

 

 

 

 

The answer is: A

 

 8- Which of the following would predominate in the zone of irritation?

  1. Bacteria.
  2. Chronic inflammatory cells.
  3. Capillary buds.
  4. Necrotic elements.

 

 

 

 

 

The answer is: B

 

9- The periapical lesion that would most likely contain bacteria within the lesion is:

  1. apical abscess.
  2. apical cyst.
  3. periapical granuloma.
  4. condensing osteitis.

 

 

 

 

 

The answer is: A

 

10- Leukocytes move through the endothelium and into tissue by a process known as:

  1. diapedesis.
  2. emigration.
  3. transudation.
  4. margination.

 

 

 

 

 

 

The answer is: A

 

11- Opsonization facilitates:

  1. mitosis of fibroblasts.
  2. chemotaxis of neutrophils.
  3. vasodilatation.
  4. phagocytosis.

 

 

 

 

 

The answer is: D

 

12- A chemical mediator of inflammation that is responsible for early vascular response to injury is: 

  1. C.a.
  2. C5a
  3. histamine
  4. bradykinin

 

 

 

 

 

The answer is: C

 

13- The factor that is responsible for stimulating nerve endings to cause the pain associated with acute apical periodontitis is:

  1. fluid pressure.
  2. histamine
  3. complement
  4. neutrophilic enzymes.

 

 

 

 

 

The answer is: A

 

14- A sinus tract associated with a suppurative apical periodontitis usually:

  1. is lined with epithelium.
  2. should be cauterized or removed surgically.
  3. will not heal unless the microorganisms arc curetted fromlheapical area.
  4. requires no special treatment other than root canal treatment of the offending tooth.

 

 

 

 

 

The answer is: D

 

 15- What is the usual histologic picture of the pulp in a tooth with a chronic apical periodontitis (dental granuloma)?

  1. Pulpal abscess in the coronal pulp with chronic inflammation in the radicular pulp.
  2. Necrotic pulp.
  3. The majority of the pulp exhibits chronic inflammation.
  4. Chronic inflammation in the coronal pulp and the radicular pulp appears normal.

 

 

 

 

 

 

The answer is: B

 

16- Chronic apical periodontitis (granuloma) presents a histologic picture that is most consistent with:

  1. infection.
  2. early cyst formation.
  3. healing.
  4. immune response.

 

 

 

 

 

The answer is: D