Cementum MCQs
Oral Histology MCQs

Cementum MCQs _ Oral Histology MCQs

1. Which dental tissue doesn’t contain nerves:
   A. Bone
   B. Dentin
   C. Cementum
   D. Pulp
   
2. Which of the following is least mineralized:
   A. Cementoid
   B. Incremental line
   C. Cellular cementum
   D. Acellular cementum
   
3. Root lengthening is contributed by:
   A. Cellular cementum
   B. Acellular cementum
   C. Intermediate cementum
   D. All of the above
   
4. Trauma or excessive occlusal forces causes:
   A. Hyperplasia of cementum
   B. Hypertrophy of cementum
   C. Resorption of cementum
   D. None of the above
   
5. At the CEJ cementum overlaps enamel about:
   A. 55 to 60%
   B. 60 to 65%
   C. 65 to 70%
   D. 70 to 75%
   
6. Cementum is:
   A. Avascular
   B. Vascular
   C. Has blood supply initially only
   D. None of the above
   
7. If overgrowth of cementum does not improve the functional qualities of cementum, it is termed as:
   A. Hyperplasia
   B. Hypoplasia
   C. Hypertrophy
   D. Excementoses
   
8. Intermediate cemental layer:
   A. Does not exhibit features of either dentin of cementum
   B. Predominantly seen in apical two thirds of roots of molars and premolars and is rare in incisors or deciduous teeth
   C. Represents area of entrapment of hertwig’s sheath in dentin or cementum
   D. All of the above are correct
   
9. Cementum that forms in conjunction with root end formation and eruption:
   A. Cellular cementum
   B. Acellular cementum
   C. Both of the above
   D. None of the above
   
10. Which of the following is a rare occurrence:
    A. Enamel meet cementum at a point
    B. Enamel overlaps cementum
    C. Cementum overlaps enamel
    D. Both never meet
    
11. Maximum fluoride content is seen in:
    A. Dental cementum
    B. Dental pulp
    C. Enamel
    D. Dentin
    
12. Secondary cementum is generally confined to:
    A. Cervical third of the root
    B. Middle third of the root
    C. Apical third of the root
    D. No secondary cementum forms
    
13. Cellular cementum and compact bone contain:
    A. Sharpehy’s fibres and elastic fibres
    B. Collagen fibres and blood vessels
    C. Canaliculi and incremental lines
    D. Lacunae and elastic fibers
    
14. Cellular cementum is:
    A. First formed cementum
    B. Less calcified than acellular type
    C. More calcified than acellular type
    D. Less irregular
    
15. Bundle bone is part of:
    A. Periodontal ligament
    B. Alveolar bone
    C. Cementum
    D. Longbones
    
16. Hardness of fully mineralized cementum is:
    A. Less than dentin
    B. More than dentin
    C. Equal dentin
    D. None of the above
    
17. Which of the following is true of cellular cementum :
    A. Forms during root formation
    B. Forms after the eruption of the tooth
    C. Seen at the coronal portion of the tooth
    D. Formation is a slow process
    
18. Cementuoenamel junction is approximately at the level at which the root canal becomes:
    A. Twisted
    B. Curved
    C. Pulp chamber
    D. Lateral canal
    
19. Intermediate cementum is:
    A. Highly defined cellular zone near cemento – dentinal junction (CDJ)
    B. Highly defined fibrillar zone near CDJ
    C. Poorly defined zone near cemento-dentinal junction
    D. Both a and B
    
20. Inorganic content of cementum is:
    A. 45 to 50%
    B. 50 to 55%
    C. 55 to 60%
    D. 60 to 65%
    
21. The region in which cementum formation is most rapid is:
    A. Middle
    B. Coronal
    C. Apical
    D. Interradicular
    
22. Which of the following statement is true:
    A. Cementum is thinnest at CEJ (20-50μm)
    B. Cementum is thickest towards the apex (150-200μm)
    C. The apical foramen is surrounded by cementum
    D. All of the above
    
23. Reestablishing the former outline of the root surface is:
    A. Anatomic repair
    B. Functional repair
    C. Physiological repair
    D. Hyperplasia
    
24. Intermediate cementum is:
    A. Between enamel and cementum
    B. Found at dentinocemental junction
    C. Apical third
    D. Coronal third
    
25. Which of the following is correct:
    A. Cementum is more resistant to resorption than bone
    B. Bone is more resistant to resorption than cementum
    C. Both are equally resorbable
    D. None of the above
    
26. Chronic periapical inflammation is usually associated with:
    A. Ankylosis
    B. Resorption of cementum
    C. Hypertrophy of cementum
    D. Hyperplasia of cementum
    
27. If cementum is not formed:
    A. Ankylosis may occur
    B. Exforliation of teeth occur
    C. Delayed eruption
    D. No change occurs
    
28. Which of the following is true:
    A. The uncalcified matrix of cementum is called cementoid
    B. Cementum contain type I collagen predominantly
    C. Cementodentinal junction is sometimes scallopes in deciduous teeth and smooth in permanent teeth
    D. All of the above
    
29. Acellular cementum is typically found in:
    A. Coronal half of root
    B. Apical half of root
    C. Apex of root
    D. Entire root
    
30. At the cemento-enamel junction, which of the following occurs:
    A. Cementum meets enamel
    B. Cementum overlaps enamel
    C. Cementum does not meet enamel
    D. All of the above
    
31. Inorganic content of cementum is:
    A. Less than bone
    B. More than bone
    C. Equal to that of bone
    D. More than that of enamel
    
32. Butt joint in cementoenamel junctions seen is _________% of cases:
    A. 10%
    B. 30%
    C. 60%
    D. 90%
    
33. Cementum:
    A. Is derived from the sheath of hertwig
    B. Is acellular in the apical third of the tooth
    C. Often overlaps the enamel
    D. Does not contain collagen fibres