dental materials

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cassiedh
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74910
Filename:
dental materials
Updated:
2011-03-24 00:46:24
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ch7reviewquestions
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chapter 7 review questions
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  1. fluoride can be found as naturally occurring in which one of the following
    A coffe
    B raw seafood
    C tea
    d. beans
    C tea
    (this multiple choice question has been scrambled)
  2. when tooth enamel first begins to demineralize what is one of the corrective measures that can be taken to stimulate remineralization
    A. stop eating foods with proteins and amino acids
    B. brush with baking soda and salt
    C.check the labels on food packages to determine whether they contain fluoride
    D. use a daily rinse containing fluoride
    D. use a dialy rinse containing fluoride
    (this multiple choice question has been scrambled)
  3. when enamel is remineralized with fluoride
    A. all of the calcium is replaced
    B. the resultatn remineralized crystal is more resistant to acids
    C. the fluoride contains a poison that kills all bacteria assocaited with dental caries (don't we wish)
    D. it is a different color
    B. the resultant remineralized crystal is more resistant to acids
    (this multiple choice question has been scrambled)
  4. fluorosis is always considered to be
    A. destructive to the tooth
    B. a sign that the person will need to have bleaching and restorations
    C. very unsightly
    D. a sign that the person has ingested more than the optimum amount of fluoride
    D. a sign that the person has ingested more than the optimum amount of fluoride
    (this multiple choice question has been scrambled)
  5. nightly home fluoride treatment with 1.1% sodium fluoride as a brush on gel or in custom trays is indicated for
    A. children younger than years of age
    B. adolescent with one or two pit and fissrue caries
    C. middle aged women going through menopause
    D. elderly pt taking mediations that cuase dry mouth
    D. eldery pt taking meds that cause dry mouth
    (this multiple choice question has been scrambled)
  6. sealant material is
    A. never in need of replacement once in place
    B. an unfilled or lightly filled resin
    C. used for protection of smooth surface caries
    D. indicated for all permanent molars
    B. an unfilled or lightly fillled resin
    (this multiple choice question has been scrambled)
  7. when a dental sealant is placed the technique
    a is exaclty the same as bonding to dentin
    b. requries the feild to be kept dry
    c. can be done by dental hygienist and assistants in all states
    d. always requries the use of a curing light
    c requries the field to be kept dry
  8. which one of the following is the best candidate for sealants
    A. tooth with decay into dentin
    B. molar with stained fissures in a 50 year old pt
    C. tooth with shallow pit and fissures
    D. newly erupted tooth with numerous deep fissures
    D. newly erupted tooth with numerous deep fissures
    (this multiple choice question has been scrambled)
  9. if caries in a fissure is undected and is inadvertently coverd by a well placed sealant what will happen?
    a caries will progress rapidly
    b. caries will progress slowly
    c. caires wil stop progressing
    c. caires will stop progressing
  10. very small filler particles are added to sealant materials for which purpose
    A. to improve the esthetics
    B. to decrease wear of sealant
    C. to increase adhesion to enamel
    D. to block opening of fissure
    B. to decrease wear of sealant
    (this multiple choice question has been scrambled)
  11. how is the surface of the tooth prepared before acid etching for sealant placement
    a pt is asked to brush teeth
    b. teeth wiped with gauze
    c. fluoride gel is applied
    d surfaces are cleaned with pumice
    d. surfaces are cleaned with pumice
  12. the acid most commonly used to etch the enamel for sealant placement is which one
    A. citric acid
    B. phosphoric acid
    C. nitric acid
    D. hydrochloric acid
    B. phosphoric acid
    (this multiple choice question has been scrambled)
  13. the tip of the light wand of the curing light should be held how close to the sealant?
    A. about 1/2 inch away
    B. in contact with sealant
    C. very close about 1 mm away from the surface
    D. with a good light it doesn't matter how far away you are
    C. very close about 1 mm awqay from the surface
    (this multiple choice question has been scrambled)
  14. all of the following except one are reasons why pits and fissures are so susceptible to careis which one is the exception
    A. the enamel lining them is very thin
    B. they retain bacteria and food debris
    C. they are often deep and narrow
    D. toothbrush bristles cannot reach into fissures to clean them
    A. the enamle lining them is very thin
    (this multiple choice question has been scrambled)
  15. after placement of a sealant which of the following should be checked?
    a. sealant surface for voids or porosities
    b. the occlusion
    c. the contact arease with adjacent teeth
    d. all of the above
    d. all of the above
  16. the most common reason for loss of a sealant shortly after placement is which of the following
    A. the sealant material was bad
    B. saliva contamination after acid etching
    C. inadequate etching time
    D. inadequate curing time
    B. saliva contamination after acid etching
    (this multiple choice question has been scrambled)
  17. how should the surface of the enamel appear after acid etching
    A. slightly yellow
    B. frosty white
    C. shiny
    D. bright gray
    B. frosty white
    (this multiple choice question has been scrambled)
  18. what does the acid etch do to the surface of the enamel
    a. creates a roughend irregular surface
    b. leaves a smooth clean surface
    c. evenly removes about half the enamel
    d. none of the above
    a creates a roughened irregular surface
  19. the most important requirement for successfully bonding sealants to enamel is
    A. long drying times
    B. a high concetnration of acid for etching
    C. long etching times
    D. good isolation to prevent saliva contamination
    D. good isololation to prevent saliva contamination
    (this multiple choice question has been scrambled)
  20. studies hsow caries to occur in pits and fissures most often in which groups of teeth
    A. perm max incisors
    B. perm premolars
    C. perm molars
    C. perm molars
    (this multiple choice question has been scrambled)
  21. how does a sealant adhere to the etched enamel surface?
    A. chemical bond to surface
    B. micromechanical retention
    C. sealant is very sticky and adheres to the surface like glue
    D. shrinking when polymerized it tightly grips the surface
    B. micromechanical retention
    (this multiple choice question has been scrambled)
  22. the main purpose of most desensitizing agents
    A. to close the openings of enamel rods to prevent temp and osmotic changes in enamel fluids
    B. plug openings of exposed dentinal tubules
    C. help dental hygienist keep pt comfortable during dental prophy procedure
    D. when added to toothpaste, is to improve the taste and keep it from burning the gingiva
    B. plug openings of exposed dential tubules
    (this multiple choice question has been scrambled)
  23. when a mouth guard is prescribed by the dentist fabrication can be done by
    a dental assistant
    b. dental hygienist
    c. laboratory technician
    d. all of the above
    d. all of the above
  24. the main purpose of a mouth guard is
    A. keep teeth in alignment after ortho
    B. to help protect the teeth and supporting structures during contact sports
    C. use as bleaching trays
    D. use as a tray for placing fluoride on teeth
    B. to help protect the teeth and supporting structures during contact sports
    (this multiple choice question has been scrambled)
  25. custom made mouth guards and splints may be made of
    A. thermoplastic sheets of resilient plastic or hard processed acrylic resin
    B. tay acrylic
    C. composite resin
    D. plastic material softened by boiling
    A. thermoplastic sheets of resilient plastic or hard processed acrylic resin
    (this multiple choice question has been scrambled)
  26. bleaching of teeth
    A. is very predictable
    B. can cause sensitivity of the teeth
    C. can cuase them to become soft
    D. affects only extrinsic stains
    B. can cause sensitivity of the teeth
    (this multiple choice question has been scrambled)
  27. bleaching of teeth works
    A. by penetrating both enamel and dentin and oxidizing the stain
    B. by sealing surface porosities so that stain cannot enter the tooth surface
    C. by creating a white coating on the surface of the enamel
    D. by removing surface stains
    A. by penetrating both enamel and dentin and oxidizing the stain
    (this multiple choice question has been scrambled)
  28. in office bleaching
    A. is superior in results to home bleaching
    B. there are way too many review questions
    C. yay this is my last one!
    D. produces equivalent results to home bleaching but is faster
    D. produces equivalent results to home bleaching but is faster
    (this multiple choice question has been scrambled)

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