313 PCS written examination
313 PCS written examination:
- The structures of normal preiodontium are including:
a. Gingiva, periodontal ligament, cementum, and alveolar bone.
b. Periodontal ligament, cementum, and alveolar bone.
c. Alveolar bone, alveolar mucosa, gingiva, periodontal ligament, and cementum.
- Sharpey’s fibers are:
a. The principal fibers.
b. Insert into cementum only.
c. The terminal portions of the principal fibers.
d. Insert into alveolar bone only.
- Attached gingiva:
a. Is the distance between the mucogingival junction and marginal gingiva groove.
b. Includes marginal gingiva.
c. Has same width of the keratinized gingiva.
d. Decreases with age and in supraerupted teeth.
- Normal clinical features of gingiva may include:
a. Stippled attached and marginal gingiva.
b. Fibroedematous.
c. Physiologic pigmentation.
d. Red and swollen papilla.
- Periodontal ligaments are:
a. Attached the teeth to the bone and periosteum.
b. Including transseptal and interradicular fibers.
c. Consisted of stratified squamous epithelium.
d. Transmitted of occlusal forces to the gingiva.
-The portion of the tooth covered by periodontal tissues is called:
a. Anatomic crown.
b. Clinical crown.
c. Clinical root.
d. Both b and c.
- Acellular cementum covers the apical third or half of the root, and it does not contain cells (cementocytes).
a. Both sentences are correct.
b. Both sentences are incorrect.
c. First sentence is correct, and second sentence is incorrect.
d. Second sentence is correct, and first sentence is incorrect.
- Lamina dura is:
a. The inner socket wall.
b. Called alveolar bone proper.
c. A radiopaque line surrounding the root.
d. All above.
-The main etiologic factor of periodontal disease is:
a. Dental stains.
b. Calculus.
c. Bacterial plaque.
d. Material alba.
e. Non above.
- Overhanging margin of restoration is:
a. Not cause inflammation of gingiva.
b. An iatrogenic factor.
c. Prevent self-cleaning mechanisms.
d. Only b and c.
e. Only a and c.
- Periodontal pockets:
a. Occur by apical displacement of the gingival attachment.
b. Associated with diseased and healthy gingiva.
c. Can be located by careful probing.
d. Exist as suprabony or intrabony.
e. All above.
f. Only a, b and d.
g. Only a, c and d.
- Gingival abscess:
a. Involving the supporting periodontal structures.
b. Localized in the gingiva.
c. Related to non vital tooth.
d. All above.
- Periodontitis is always preceded by gingivitis, but not all gingivitis progresses to
periodontitis.
a. First sentence is true, and second sentence is false.
b. Second sentence is true, and first sentence is false.
c. Both sentences are true.
d. Both sentences are false.
- Furcation involvement:
a. Refers to the invasion of multirooted teeth by periodontal disease.
b. Grade III is total bone loss (through-and-through).
c. Can be clinically evaluated with Nabers probe.
d. Can be indicated by triangular radiolucency in the Furcation area.
e. All above.
f. Only b and c.
g. Only a, c and d.
- The followings are clinical signs of periodontitis except:
a. Pocket formation.
b. Inflammation.
c. Attachment loss.
d. Bone loss
e. Pulpitis.
f. Tooth mobility.
- Periodontal probing is useful for:
a. Detection of periodontal pocket.
b. Measuring tooth mobility.
c. Assessing plaque and calculus accumulation.
d. Measuring clinical pocket depth.
e. Clinical assessment of gingival bleeding indices.
f. All above.
g. Only a, b, and d.
h. Only a, b, c, and e.
i. Only a, c, d and e.
- Pocket depth is the distance between the base of the pocket and gingival margin. The level of attachment is the distance between the base of the pocket and cementoenamel junction.
a. Both sentences are incorrect.
b. Only first sentence is incorrect.
c. Only second sentence is correct.
d. Both sentences are correct.
- Radiographic changes in periodontitis include the following except:
a. Horizontal bone loss.
b. Angular bone defect.
c. Break in the continuity of the lamina dura.
d. Widening of periodontal ligament space.
e. Furcation involvement.
f. The earliest signs of bone loss.
g. Loss of crestal bone density.
h. Crown to root ratio.
- The prognosis of periodontal disease is generally better in:
a. Older patient.
b. Patient who smoke.
c. Younger patient.
d. Patient with diabetes.
e. Patient who willingness to maintain good oral hygiene.
f. Non above.
- Objectives of “Phase I Periodontal Therapy” are:
a. Elimination of gingival inflammation.
b. Plaque control and patient education.
c. Extraction of hopeless teeth.
d. Correction of restorative and prosthetic irritational factors.
e. Removal of calculus and root planing.
f. Non above.
g. Only a, b, c, and e.
h. Only a, b, and e.
i. All above.
- Subgingival adaptation around the root is better with both curettes and scalers.
a. True.
b. False.
- Use of sickle scaler for removal of supragingival calculus and removal of the soft tissue lining the pocket.
a. True.
b. False.
- Basic characteristics of a sickle scaler: triangular shape, single cutting edge, and pointed tip.
a. True.
b. False.
- Gracey curette is the instrument of choice for root planing.
a. True.
b. False.
- Light reflected from the sharp angled cutting edge of a curette instrument appears as a bright line.
a. True.
b. False.
- Universal curette is:
a. Area specific.
b. Only one cutting edge.
c. Curved in two planes.
d. Not offset blade.
e. Non above.