MCQs in Periodontology

Chapter 1: Normal Periodontium

 

1- The main function of the gingiva is:

  1. Attaching the tooth to alveolar bone
  2. Protection: of underlying tissues
  3. Providing blood supply to teeth
  4. Taking the brunt of mastication·

 

 

 

 

 

 

The answer is: B

 

2- Cases that show free gingival groove are:

 

  1. 20°/o
  2. 30°/o
  3. 40°/o
  4. 50°/o

 

 

 

 

 

 

The answer is: D

 

3- Under absolutely normai . conditions, the depth of gingival sulcus is about:

 

  1. 0 mm
  2. 1 mm
  3. 2 mm
  4. 3 mm

 

 

 

 

 

The answer is: A

 

4- The attached gingiva is attached -to:

 

  1. Root
  2. Periosteum
  3. Both of the. above
  4. None of the above

 

 

 

 

 

The answer is: C

 

5- The width of attached gingiva is the distance between:

 

  1. Bottom of gingival sulcus to MG junction
  2. Bottom of periodontal pocket to MG junction
  3. Both of the above are correct
  4. None of the above are correct

 

 

 

 

 

 

The answer is: C

 

6- The width of attached gingiva is greatest in:

 

  1. Maxillary anterior region
  2. Mandibular molar region
  3. Maxillary premolar region
  4. Mandibular premolar region

 

 

 

 

 

 

The answer is: A

 

7- The width of attached gingiva is least in:

 

  1. Mandibular. anterior region
  2. Mandibular canine region
  3. Maxillary/ anterior region
  4. Mandibular premolar region

 

 

 

 

 

 

The answer is: D

 

8- The width of attached gingiva:

 

  1. Increases with age
  2. Decreases with age
  3. Is stationary throughout life
  4. Is the distance between gingival margin and mucogingival junction

 

 

 

 

 

 

The answer is: A

 

9- The junction is seen on:

 

  1. Facial side
  2. Palatal side
  3. Both of the above
  4. None of the above

 

 

 

 

 

 

The answer is: A

 

10- Interdental papilla is formed by:

 

  1. Marginal gingiva
  2. Attached gingival
  3. Both of the above
  4. None of the above

 

 

 

 

 

 

The answer is: C

 

11- Which of the following gingival cell is nota clear cell:

 

  1. Melanocyte
  2. Keratinocyte
  3. Langerhan's cell
  4. Merkle cell

 

 

 

 

 

 

The answer is: B

 

12- Proliferation of Keratinocytes takes place from:

 

  1. Basal cell layer
  2. Stratum basale
  3. Both of the above
  4. None of the above

 

 

 

 

 

 

 

The answer is: C

 

13- Which of the following are seen less commonly in the superficial layers of gingival epithelium:

 

  1. Lipid droplets
  2. Keratohyalin granules
  3. Tonofibrils
  4. Mitochondria

 

 

 

 

 

 

 

The answer is: D

 

14- Which of the following is absent in parakeratinized gingiva:

 

  1. Stratum corneum
  2. Stratum spinosum
  3. Stratum grati.ulosum
  4. Stratum basale ·

 

 

 

 

 

 

 

The answer is: B

 

15- Which of the following does not contain cytokenitins:

 

  1. Keratinized epithelium
  2. epithelium
  3. Nonkeralinized epithelium .
  4. None of the above

 

 

 

 

 

 

The answer is: D

 

16- The main keratin found irt -stratum corneum is:

 

  1. K1
  2. K8
  3. K19
  4. K40

 

 

 

 

The answer is: A

 

17- Keratinosomes are abundantly found in:

 

  1. Stratum corneum
  2. Stratum granulosurn
  3. Stratum spinosum
  4. Stratum basale

 

 

 

 

 

 

The answer is: C

 

18- Lamina densa of gingival basal lamina is made up of:

 

  1. Type I collagen
  2. Type II. collagen
  3. Type III coHagen u.
  4. Type IV coHagen

 

 

 

 

 

 

The answer is: D

 

19- Gingival basal lamina is permeable to:

 

  1. Fluids
  2. Particulate matter
  3. Both of the above
  4. None of the above

 

 

 

 

 

 

 

The answer is: A

 

20- The more common surface presentation of outer gingival epithelium is:

 

  1. Keratinized
  2. Parakeratinized
  3. Nonkeratinized
  4. None of the above

 

 

 

 

 

 

The answer is: B

 

21- The degree of keratinization does not diminish with:

 

  1. Age
  2. Onset.of menopause
  3. Onset of menstruation
  4. None of the above

 

 

 

 

 

 

The answer is: C

 

22- The keratin polypeptide, K19, is expressed by:

 

  1. Oral gingival epithelium
  2. Palatal epithelium
  3. Junctional epithelium
  4. All of the above

 

 

 

 

 

 

The answer is: C

 

23- Type IV collagen is absent in:

 

  1. The basal lamina of the endothelium
  2. The external basal lamina of junctional epithelium
  3. The internal basal lamina of junctional epithelium
  4. The basal lamina of oral gingival epithelium

 

 

 

 

 

 

 

The answer is: C

 

24- The glycoprotein found in gingival connective tissue is:

 

  1. Hvaluronic acid
  2. Fibronectin
  3. Chondroitin sulfate
  4. Laminin

 

 

 

 

 

 

The answer is: C

 

25- Laminin is found in gingival:

 

  1. Basal lamina
  2. Connective tissue
  3. Both of the above
  4. None of the above

 

 

 

 

 

 

 

The answer is: A

 

26- The major component of gingival connective tissue is:

 

  1. Type I collagen
  2. Type II collagen
  3. Type III collagen
  4. Type IV collagen

 

 

 

 

 

 

 

The answer is: A

 

27- Which of the following cells is· not found in the gingival connective tissue:

 

  1. Fibroblast
  2. Mast cell
  3. Histiocyte
  4. None of the above

 

 

 

 

 

 

The answer is: D

 

28- The temperature receptors of gingiva are:

 

  1. Argyrophilic fibres
  2. Meissner-type corpuscles
  3. Kause-type end bulbs
  4. All of the above

 

 

 

 

 

 

The answer is: C

 

29- Melanin pigmentation of gingiva starts appearing:

 

  1. In 1st trimester
  2. In second trimester
  3. In third trimester
  4. Afterbirth

 

 

 

 

 

 

The answer is: D

 

30- Which of the following is stippled:

 

  1. Attached gingiva
  2. Marginal gingiva
  3. Both .of the above
  4. None of the above

 

 

 

 

 

 

The answer is: A

 

31- The distance between apical end of junctional epithelium and crest of alveolar bone:

 

  1. Increases with age
  2. Decreases with age
  3. Is stationary throughout life
  4. Depends on health of periodontium

 

 

 

 

 

 

The answer is: C

 

32- The amount of crevicular fluid that can be collected in a strictly normal gingiva is:

 

  1. Nil
  2. 1 ul
  3. 2 ul
  4. 3 ul

 

 

 

 

 

 

 

The answer is: A

 

33. Which of the following is not used for collecting gingival crevicular fluid:

 

  1. Micropipettes
  2. Absorbing paper stripes
  3. Twisted threads
  4. Periochips

 

 

 

 

 

 

 

The answer is: D

 

34- What is a periopaper?

 

  1. The paper used for periodontal charting
  2. The paper used in bleeding points index
  3. The paper used to collect crevicular fluid
  4. None of the above

 

 

 

 

 

 

 

The answer is: C

 

35- The source of collagenase in GCF can be:

 

  1. Fibroblast
  2. PMN leukocyte
  3. Bacteria
  4. All of the above

 

 

 

 

 

 

 

The answer is: D

 

36- Which of the following leukocytes is not found in crevicular fluid:

 

  1. PMN
  2. Macrophage
  3. Lymphocyte
  4. Basophil

 

 

 

 

 

The answer is: D

 

37- When compared to blood glucose levels, GCF glucose levels are:

 

  1. Almost same
  2. Very less
  3. Less
  4. High

 

 

 

 

 

 

 

The answer is: D

 

38- When compared to serum, the total protein content in GCF is:

 

  1. Almost the same
  2. Slightly high
  3. Less
  4. Very high

 

 

 

 

 

 

 

The answer is: B

 

39- Which of the following does not increase the flow of crevicular fluid:

 

  1. Inflammation
  2. Smoking
  3. Trauma from occlusion
  4. Brushing

 

 

 

 

 

 

 

The answer is: B

 

40- The majority of leukocytes found in gingival sulcus are:

 

  1. Dead
  2. Not having phagocytic capacity
  3. Not having killing capacity
  4. None of the above are correct

 

 

 

 

 

The answer is: D

 

41- The main route of entry of leukocytes into oral cavity is through:

 

  1. Saliva
  2. GCF
  3. Pharynx
  4. Larvnx

 

 

 

 

 

 

The answer is: B

 

42- Type III collagen is mainly found in:

 

  1. Principal fibres
  2. Reticular fibres
  3. Sharpey's fibres
  4. None of the above

 

 

 

 

 

The answer is: B

 

43- The periodontal ligament fibres that mainly prevent extrusion of teeth are:

 

  1. Trans-septal fibres
  2. Alveolar crest group
  3. Horizontal fibres
  4. Inter-radicular fibres.

 

 

 

 

 

 

 

The answer is: B

 

44- Oxytalan fibres in periodontal ligament run:

 

  1. Perpendicular to the root surface
  2. Parallel to the root surface
  3. At 45° angle to the root surface
  4. At 70° angle to the root surface

 

 

 

 

 

 

 

The answer is: B

 

45- Indifferent fibre plexus in the periodontal ligament is formed by:

 

  1. Collagen fibres
  2. El uanin fibres
  3. Oxytalan fibres
  4. Elastic fibres

 

 

 

 

 

 

 

The answer is: A

 

46- The most common cells in periodontal ligament are:

  1. Fibroblasts
  2. Epithelial rests
  3. Osteoblasts
  4. Neutrophils

 

 

 

 

 

 

 

 

The answer is: A

 

47- The orientation of fibroblasts in the periodontal ligament is:

 

  1. Parellel to the root
  2. Parallel to alveolar bone
  3. Along the principal fibres
  4. Along the blood vessels

 

 

 

 

 

 

 

The answer is: C

 

48- The function of fibroblast in periodontal ligament:

 

  1. Synthesis of collagen
  2. Degradation of old collagen
  3. Both of the above
  4. None of the above.

 

 

 

 

 

The answer is: C

 

49- Epithelial rests in periodontal ligament are usually located close to:

 

  1. Cribriform plate
  2. Blood vessels
  3. Intermediate plexus
  4. Cementum

 

 

 

 

 

 

 

The answer is: D

 

50- Epithelial rests in periodontal ligament are relatively less. common in which of the following areas:

 

  1. Cervical areas
  2. Apical areas
  3. Midroot level
  4. Fundus of socket

 

 

 

 

 

 

 

The answer is: C

 

51- Which of the following is not correct about epithelial rests of Malassez:

 

  1. They can become cementicles
  2. They are surrounded by basal lamina
  3. They increase with age
  4. They contain tonofilaments

 

 

 

 

 

 

The answer is: C

 

52- The glycosaminoglycon found in the ground substance of periodontal ligament is:

 

  1. Laminin
  2. Fibronectin
  3. Hyaluronic acid
  4. All of the above

 

 

 

 

 

The answer is: C

 

53- Which of the following is not correct about periodontal ligament:

 

  1. It is shaped like hourglass
  2. It ·is thicker on mesial side of root
  3. It is narrow at axis of rotation
  4. None of the above

 

 

 

 

 

 

The answer is: B

 

54- Which of the following does not get nutrient supply from periodontal ligament:

 

  1. Cementum
  2. Alveolar bone
  3. Gingiva
  4. None of the above

 

 

 

 

 

 

 

The answer is: D

 

55- Cemental repair occurs in areas of root that are:

 

  1. Exposed to pocket environment
  2. Not exposed to pocket environment
  3. Both of the above
  4. None of the above

 

 

 

 

 

 

The answer is: B

 

56- Which of the following is incorrect about cementum:

 

  1. It is mesenchymal
  2. It is avascular
  3. It covers clinical root
  4. None of the above

 

 

 

 

 

The answer is: C

 

57- Which of the following are the pressure perceptors of periodontal ligament:

 

  1. Free nerve endings
  2. Ruffini-like receptors
  3. Meissner's corpuscles
  4. Spindle like nerve endings

 

 

 

 

 

 

 

The answer is: D

 

58- The major component of acellular cementum:

 

  1. Intrinsic Collagen
  2. Sllarpey' s fibres
  3. Cementum matrix
  4. Cementoblasts

 

 

 

 

 

 

 

The answer is: B

 

59- Acellular afibrillar cementum is found on:

 

  1. Cervical third of root
  2. Middle third of root
  3. Apical third of root
  4. Enamel

 

 

 

 

 

 

 

The answer is: D

 

60- Which of the following is found in acellular afibrillar cementum:

 

  1. Cells
  2. Intrinsic collagen
  3. Extrinsic collagen
  4. None of the above

 

 

 

 

 

The answer is: D

 

61- Intermediate cementum is found over the surface of:

 

  1. Enamel
  2. Dentin
  3. Cementum
  4. Cementoenamel junction

 

 

 

 

 

 

The answer is: B

 

62- Which of the following is correct about the permeability of cementum:

 

  1. It increases with age
  2. It decreases with age
  3. It is not altered by age
  4. It doesn't exist

 

 

 

 

 

 

 

The answer is: B

 

63- The most common presenht.tion of cementoenamel junction is:

 

  1. Butt-joint
  2. Failure to meet each other
  3. Enamel ovelaps cementum
  4. Cementum overlaps enamel

 

 

 

 

 

 

 

The answer is: D

 

64- Cementum formation is more rapid in:

 

  1. Cervical area
  2. Midroot area
  3. Apical area
  4. Developmental grooves

 

 

 

 

 

 

The answer is: C

 

65- Which of the following is not a cause for hypercementosis:

 

  1. Paget's disease
  2. Missing antagonist
  3. Periapical infection
  4. Scleroderma

 

 

 

 

 

 

 

The answer is: D

 

66- The line that demarcates newly formed cementum from previous resorption:

 

  1. Burtonian line
  2. Reversal line
  3. Resorption line
  4. Incremental line

 

 

 

 

 

 

The answer is: B

 

67- The lifespan of a tooth that undergoes ankylosis is around:

 

  1. 5 years
  2. 10 years
  3. 15 years
  4. 20 years

 

 

 

 

 

 

The answer is: A

 

68- Cementum is permeable to:

 

  1. Endotoxins
  2. Bacteria
  3. Both of the above
  4. None of the above

 

 

 

 

 

 

 

The answer is: C

 

69- Periodontal11igament fibres that mainly bear the brunt of vertical masticatory forces:

 

  1. Trans-septal fibres
  2. Alveolc;tr crest group
  3. Horizontal fibres
  4. Oblique. fibres

 

 

 

 

 

 

 

The answer is: D

 

70- Largest fibre group· in periodontal ligament:

 

  1. Transseptal
  2. Oblique
  3. Horizontal
  4. Apical

 

 

 

 

 

 

 

The answer is: B