1) Cementum is_____________? a. Avascular b. Vascular c. Has blood supply initially only d. None of the above
|
||||
2) If overgrowth of cementum does not improve the functional qualities of cementum, it is termed as_____________? a. Hyperplasia b. Hypoplasia c. Hypertrophy d. Excementoses
|
||||
3) Intermediate cemental layer_____________? a. Does not exhibit features of either dentin of cementum b. Predominantly seen in apical tow 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
|
||||
4) 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
|
||||
5) 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
|
||||
6) Maximum fluoride content is seen in_____________? a. Dental cementum b. Dental pulp c. Enamel d. Dentin
|
||||
7) 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
|
||||
8) 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 fibres
|
||||
9) Cellular cementum is____________? a. First formed cementum b. Less calcified than acellular type c. More calcified than acellular type d. Less irregular
|
||||
10) Bundle bone is part of____________? a. Periodontal ligament b. Alveolar bone c. Cementum d. Longbones
|
||||
11) Hardness of fully mineralized cementum is_____________? a. Less than dentin b. More than dentin c. Equal dentin d. None of the above
|
||||
12) 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
|
||||
13) The cementuoenamel junction is approximately at the level at which the root canal becomes_____________? a. Twisted b. Curved c. Pulp chamber d. Lateral canal
|
||||
14) 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
|
||||
15) Inorganic content of cementum is______________? a. 45 to 50% b. 50 to 55% c. 55 to 60% d. 60 to 65%
|
||||
16) The region in which cementum formation is most rapid is_____________? a. Middle b. Coronal c. Apical d. Interradicular
|
||||
17) 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
|
||||
18) Reestablishing the former outline of the root surface is_____________? a. Anatomic repair b. Functional repair c. Physiological repair d. Hyperplasia
|
||||
19) Intermediate cementum is___________? a. Between enamel and cementum b. Found at dentinocemental junction c. Apical third d. Coronal third
|
||||
20) 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
|
||||
21) Chronic periapical inflammation is usually associated with____________? a. Ankylosis b. Resorption of cementum c. Hypertrophy of cementum d. Hyperplasia of cementum
|
||||
22) If cementum is not formed______________? a. Ankylosis may occur b. Exforliation of teeth occur c. Delayed eruption d. No change occurs
|
||||
23) 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
|
||||
24) Acellular cementum is typically found in_____________? a. Coronal half of root b. Apical half of root c. Apex of root d. Entire root
|
||||
25) 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
|
||||
26) 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
|
||||
27) Butt joint in cementoenamel junctions seen is _________% of cases? a. 10% b. 30% c. 60% d. 90%
|
||||
28) 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
|
||||
29) Which of the following is correct? a. Reparative dentin is characterized by having fewer and more twisted tubules than normal dentin and may include odontoblasts b. Dead tracts appear black in transmitted and white in reflected ligth c. Sclerotic transparent dentin appears transparent or light in transmitted light and dark in reflected light d. All of the above
|
||||
30) Matrix vesicles_______________? a. Are found in mantle dentin b. Contain collagen c. Produce alkaline phosphatase d. Inhibit mineralization
|