Pulp Most Important MCQs

1 - A special feature of the periodontal ligament fibroblasts is______________?

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A. The number or organelles

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B. Presence of actin fibres and shape change

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C. size of the cells

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D. Collagen fibre formation

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Presence of actin fibres and shape change

2 - Age changes in periodeontal ligament include which of the following ?

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A. Increased fibroplasia

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B. Increased vascularity

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C. Increased thickness

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D. Decreased in number of cementicles

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Increased fibroplasia

3 - Aging process affects pulp tissue by_____________?

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A. Decreasing the size and shape of pulp tissue and cellular component

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B. Increase cellular component at the expenses of fibre component

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C. Increases vascularity of the pulp

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D. Decrease the calcific component of the pulp

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Decreasing the size and shape of pulp tissue and cellular component

4 - All of the following are true about functions of dental pulp except______________?

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A. Formation of dentin

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B. Nerve supply to dentin

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C. Sends impulses to CNS

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D. Nerve supply to enamel through fibres

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Nerve supply to enamel through fibres

5 - All of the following cells of periodontal ligament are of mesenchymal origin except______________?

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A. Fibroblasts

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B. Multi totipotent cells

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C. Cementoblasts

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D. Cell rests of malassez

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Cell rests of malassez

6 - Anchoring fibrills are composed of_____________?

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A. Type V and VII collagen

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B. Type I and III collagen

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C. Type IV collagen

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D. Type IV and III Collagen

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Type V and VII collagen

7 - Bone adjacent to periodontal ligament that contains a great number of sharpey's fibres is known as______________?

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A. Lamina dura

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B. Bundle bone

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C. Lamina propria

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D. Lamina densa

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Bundle bone

8 - Cells occurring in greatest number in pulp are______________?

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A. Cementoblasts

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B. Fibroblasts

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C. Osteoblasts

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D. Ameloblasts

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Fibroblasts

9 - Cementicles are found in the_____________?

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A. Gingiva

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B. Periodontal ligament

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C. Alveolar bone

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D. Cementum

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Periodontal ligament

10 - Centre of the disc in TMJ is_____________?

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A. Avascular

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B. Devoid of nervous tissue

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C. Avascular & deviod of nervous tissue

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D. None of the above

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Avascular & deviod of nervous tissue

11 - Collagen biosynthesis occurs inside the______________?

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A. Chondroblasts

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B. Odontoblasts

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C. Osteoblasts

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D. Fibroblasts

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Fibroblasts

12 - Collagen molecule exhibits all of the following features except_____________?

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A. Triple pleated sheath

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B. Mostly contains glycine residues

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C. Exhibit cross striations at 64 μm

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D. Intracellular in nature

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Intracellular in nature

13 - Development of supporting tissues of the tooth is initiated by____________?

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A. Cells of dental follicle

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B. Cells of odontogenic layer

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C. Cementoblasts

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D. Cells of the gingiva

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Cells of dental follicle

14 - Dystrophic calcifiaction is seen most commonly in which of the following oral tissues__________?

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A. Enamel

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B. Pulp

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C. Dentin

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D. Periodontal ligament

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Pulp

15 - Fibres of periodontal ligament embedded in the bone are_____________?

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A. Sharpey's fibres

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B. Tomes fibres

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C. Elastic fibres

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D. Ray's fibres

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Sharpey's fibres

16 - Group of fibres, which resist the masticatory forces___________?

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A. Dentogingival

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B. Transeptal

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C. Oblique

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D. Horizontal

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Oblique

17 - Histologically the dental pulp most closely resembles______________?

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A. Nerve tissue

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B. Vascular tissue

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C. Granulation tissue

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D. Loose connective tissue

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Loose connective tissue

18 - In a dried skull, holes on the lingual aspects of the deciduous teeth are called_____________?

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A. Volkmann canals

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B. Canals of Hirchfeld and Zuckerland

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C. Herversian canals

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D. Gubernacular canals

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Gubernacular canals

19 - In mammals independent and tough suspension for teeth is provided by____________?

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A. Alveolar sockets

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B. Cementum

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C. Gubernacular cords

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D. Periodontal membrane

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Periodontal membrane

20 - Interdependency of osteoblasts and osteoclasts in bone remodeling is called as_____________?

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A. Lacunae

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B. Coupling

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C. Reversal lines

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D. Canaliculi

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Coupling

21 - Intermediate plexus is absent in which of the following principle fibres_____________?

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A. Gingival

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B. Oblique

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C. Horizontal

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D. Transseptal

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Gingival

22 - Intermediate plexus is seen in the____________?

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A. Cementum

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B. PDL

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C. Pulp

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D. Dentin

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PDL

23 - Narrowing of periodontal ligament in labially placed mandibular canine with age is due to_____________?

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A. Due to deposition of cementum and bone

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B. Down growths of gingival epithelium

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C. Gingival cysts formed from cell rests

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D. Reversal of function of horizontal and oblique fibres

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Due to deposition of cementum and bone

24 - Odontoblasts are derived from______________?

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A. Undifferentiated mesenchymal

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B. Histocytes

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C. Macrophages

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D. Lymphocytes

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Undifferentiated mesenchymal

25 - Pain originate in the pulp due to_________?

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A. free nerve ending in cell rich zone

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B. free nerve ending at sub odontoblastic layer

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C. Krause bulb at the center of the pulp

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D. Meisseners corpuscles at cell rich zone

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free nerve ending at sub odontoblastic layer

26 - Pericytes are found___________?

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A. In thymus

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B. Around capillaries of pulp

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C. In gallbladder

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D. Along with heparin on surface of mast cells

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Around capillaries of pulp

27 - Periodontal fibres joining cemental surface of one tooth, to cemental surface of adjacent tooth are called____________?

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A. Gingivodental

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B. Cemental fibres

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C. Horizontal fibres

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D. Transseptal fibres

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Transseptal fibres

28 - Periodontal ligament has predominantly_________?

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A. Type II collagen fibres

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B. Oxytalan fibres

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C. Elastic fibres

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D. Type I collagen fibres

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Type I collagen fibres

29 - Periodontal ligament is made up of____________?

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A. Type I collagen

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B. Type I and Type III collagen

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C. Type I and Type II collagen

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D. Type I and Type IV collagen

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Type I and Type III collagen

30 - Principal fibres of periodontal ligament are attached to_____________?

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A. Alveolar bone proper

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B. Bundle bone

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C. Lamellar bone

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D. Cortical bone

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Bundle bone

31 - Propriceptors are seen in all except______________?

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A. Skeletal muscle

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B. TMJ

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C. Pulp

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D. None of the above

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Pulp

32 - Protein secreted by odontoblast_____________?

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A. Chitin

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B. Keratin

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C. Collagen

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D. Elastin

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Collagen

33 - Pulp responds to all stimuli by pain because it has only_______________?

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A. Free nerve endings

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B. Krause end bulbs

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C. Pacinian corpuscle

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D. Ruffini corpuscle

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Free nerve endings

34 - Pulp tissue contains all except____________?

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A. Fibroblasts

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B. Capillary

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C. Osteoblasts

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D. Ameloblasts

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Ameloblasts

35 - Regressive changes in pulp include____________?

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A. Increased fibrotic component

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B. Decreased cellular component

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C. Calcification in blood vessels near apical foramen

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D. All of the above

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All of the above

36 - Remnants of the Hertwig's root sheath are found in____________?

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A. Gingiva

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B. Alveolar bone

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C. Periodontal ligament

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D. Cementum

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Periodontal ligament

37 - Sharpey's fibres are derived from_____________?

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A. Hertwig's root sheath

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B. Epithelial rests of malassez

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C. Alveolar bone

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D. Dental follicle

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Dental follicle

38 - Sharpey's fibres are present in_______________?

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A. Bone

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B. Periosteum

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C. Periodontal ligament

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D. All of the above

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Bone

39 - Size of pulp chamber____________?

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A. Increases with age

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B. Decreases with age

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C. Increased in some cases and decreases in some cases

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D. None of the above

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Decreases with age

40 - The 2nd most prominent cells in pulp are______________?

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A. Fibroblasts

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B. defense cells

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C. Odontoblasts

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D. Histocytes or resting wandering cell

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Odontoblasts

41 - The attached apparatus of tooth is composed of______________?

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A. Gingiva, cementum and alveolar bone

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B. Gingiva and cementum

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C. Cementum and periodontal ligament

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D. Peridontal ligament the cementum and the alveolar bone

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Peridontal ligament the cementum and the alveolar bone

42 - The average life time of primary pulp in oral cavity is__________?

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A. 8.3 years

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B. 2 years

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C. 7 years

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D. 3 years

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8.3 years

43 - The calcified mass found in the PDL are_____________?

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A. Cementicles

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B. Osteoblasts

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C. Cementoclasts

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D. Osteoclasts

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Cementicles

44 - The cell free zone in pulp lies____________?

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A. Above odontoblast

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B. Below odontoblast

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C. In radicular pulp

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D. In pulp horn

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Below odontoblast

45 - The cells of the dental pulp which are responsible for the deposition of reparative dentin are_________?

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A. Osteoblasts

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B. Odontoblasts

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C. Ameloblasts

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D. Osteocytes

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Odontoblasts

46 - The component of future T.M.J shows development at _____________?

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A. 6 weeks

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B. 10 weeks

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C. 18 weeks

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D. 16 weeks

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10 weeks

47 - The dental pulp contains nerve endings/receptors for____________?

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A. Pain

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B. Pressure

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C. Proprioception

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D. Temperature

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Pain

48 - The dental pulp is derived form____________?

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A. Dental papilla

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B. Dental sac

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C. Odontoblasts

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D. Stellate reticulum

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Dental papilla

49 - The development of pulp begins__________?

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A. 6th week of IU

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B. 8th week of IU

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C. 10th week of IU

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D. 18th week of IU

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8th week of IU

50 - The diameter of the largest arterial vessels in the pulp range from_____________?

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A. 50-100 μm

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B. 101-150 μm

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C. 151-200 μm

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D. 201-250 μm

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50-100 μm

51 - The fibroblasts associated with capillaries are__________?

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A. Plasma cell

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B. Histocytes

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C. Lymphocytes

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D. Pericytes

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Pericytes

52 - The main function of horizontal fibres of P.D ligament is____________?

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A. Prevent extrusion

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B. Prevent rotation

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C. Maintains the mesiodistal width

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D. All of the above

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Maintains the mesiodistal width

53 - The most abundant group of fibres in the PDL are_____________?

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A. Trans-septal

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B. Horizontal

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C. Oblique

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D. Apical

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Oblique

54 - The most abundant principle fibre group in periodontal ligament is____________?

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A. Horizontal

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B. Transeptal

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C. Apical

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D. Oblique

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Oblique

55 - The number of pulp organs in a person in___________?

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A. 32

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B. 50

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C. 52

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D. 62

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52

56 - The odontoblasts killed during cavity preparation are derived from_____________?

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A. Unaffected odontoblasts from the pulp

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B. Undifferentiated cells

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C. Histocytes

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D. Osteoblasts

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Undifferentiated cells

57 - The periodontal ligament is approximately_____________?

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A. 0.25 mm in thickness

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B. 0.5 mm in thickness

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C. 0.75 mm in thickness

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D. mm in thickness

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0.25 mm in thickness

58 - The periodontal ligament_____________?

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A. Derives its blood supply primarily from the branches of vessels entering the pulp

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B. Has a slow rate of turn over

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C. Contains epithelial cells

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D. Comprises primarily of type II collagen

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Contains epithelial cells

59 - The plexus of Rashkov is present in which of the following zones in pulp ?

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A. Cell free zone

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B. Cell rich zone

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C. Odontoblastic zone

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D. Pulp core

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Cell free zone

60 - The primary function of the dental pulp is____________?

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A. Nutritive

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B. Production of dentin

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C. Production of enamel

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D. Vascular supply to the teeth

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Production of dentin

61 - The primary response of the pulp to tissue destruction is_______________?

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A. Necrosis

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B. Ulceration

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C. Calcific degeneration

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D. Inflammation

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Inflammation

62 - The radicular pulp is continous with tissues of the periapical area via the____________?

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A. Pulp canal

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B. Pulp chamber

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C. Mental foramen

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D. Apical foramen

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Apical foramen

63 - The rest of malassez in the periodontal ligament are derived from_____________?

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A. Dental pulp

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B. Lamina propria

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C. Odontogenic epithelium

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D. Vestibular lamina

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Odontogenic epithelium

64 - The size of apical foramen of maxillary teeth in adult is______________?

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A. 0.4 mm

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B. 0.3 mm

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C. 0.2 mm

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D. 0.7 mm

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0.4 mm

65 - The total volumes of all permanent pulp organ______________?

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A. 0.38 cc

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B. 0.58 cc

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C. 0.02 cc

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D. 3.8 cc

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0.38 cc

66 - The type of bone present in the labial area of anterior teeth is_______________?

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A. Cortical

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B. Cancellous

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C. Osteophytics

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D. Exophytic

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Cortical

67 - The vascular supply of the periodontal ligament is______________?

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A. Greatest in the middle-third of a single rotted tooth

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B. Greatest in the middle-third of a multirooted tooth

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C. A net like plexus that runs closer to the cementum than to the bone

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D. A net like plexus that runs closer to the bone than to the cementum

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A net like plexus that runs closer to the bone than to the cementum

68 - True about osteoclasts_____________?

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A. Monocytes are precursor cells of osteoclasts

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B. The plasma membrane of osteoclasts adjacent to bone that is being resorbed is known as striated or ruffled border

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C. Contain lysosomes with acid phosphates

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D. All of the above are true

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All of the above are true

69 - Unmyelinated nerve fibres of pulp are____________?

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A. Sensory in nature

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B. Respond to hot and cold

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C. carry pain sensation

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D. Associated with blood vessels and are sympathetic in nature

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Associated with blood vessels and are sympathetic in nature

70 - Vitality of pulp depends on________________?

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A. Blood supply

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B. Nerve supply

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C. Lymphatic supply

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D. All of the above

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Blood supply

71 - Weil's zone of pulp is__________?

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A. Cell degenerated zone

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B. Cell rich zone

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C. Cell regenerated zone

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D. cell free zone

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cell free zone

72 - Which of the following groups of fibres are not attached to alveolar bone ?

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A. Transseptal

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B. Horizontal

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C. Oblique

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D. Apical

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Transseptal

73 - Which of the following is not the principle fibre group of the periodontal ligament___________?

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A. Horizontal

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B. Oblique

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C. Alveolar crest

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D. Transseplat

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Transseplat

74 - Which of the following structures is not found in a living pulp ?

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A. Collagen fibres

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B. Haversian fibres

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C. Non-myelinated nerve fibres

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D. Reticulum

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Haversian fibres

75 - Width of PDL is_______________?

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A. 0.10 mm

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B. 0.50 mm

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C. 0.25 mm

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D. 0.75 mm

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0.25 mm

76 - Width of the periodontal ligament is least at______________?

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A. Cervical third

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B. Apical third

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C. Fulcrum of rotation

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D. It has uniform width

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Fulcrum of rotation

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