5dd MCQs 242 Orthodontic Prof. Mom Sovannrithy 2019

60 Questions | Total Attempts: 127

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5dd MCQs 242 Orthodontic Prof. Mom Sovannrithy 2019

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Questions and Answers
  • 1. 
    Lower incline bite plane use for correcting?
    • A. 

      Simple anterior cross bite

    • B. 

      Posterior cross bite

    • C. 

      Unilateral cross bite

    • D. 

      Bilateral cross bite

  • 2. 
    What is the lower incline bite plane?
    • A. 

      An appliance for correct simple cross bite

    • B. 

      Fixed appliance

    • C. 

      Removable appliance

    • D. 

      Functional appliance

  • 3. 
    Lower incline bite plane cover the teeth of ?
    • A. 

      Lower labial segment

    • B. 

      Lower buccal segment

    • C. 

      Upper labial segment

    • D. 

      Upper buccal segment

  • 4. 
    Lower incline bite plane we make incline in?
    • A. 

      45 degree

    • B. 

      30 degree

    • C. 

      15 degree

    • D. 

      60 degree

  • 5. 
    How many bend orders is the most comment use in orthodontic?
    • A. 

      3

    • B. 

      2

    • C. 

      4

    • D. 

      5

  • 6. 
    What is the 2nd bend order mean?
    • A. 

      Tiping

    • B. 

      Torqueing

    • C. 

      In-out

    • D. 

      Up-down

  • 7. 
    The most comment used of wire in fixed appliance is?
    • A. 

      Rectangular and round

    • B. 

      Round and triangle

    • C. 

      Rectangular and triangle

    • D. 

      Bending wires

  • 8. 
    How many direction do fixed appliance can do?
    • A. 

      6

    • B. 

      4

    • C. 

      5

    • D. 

      3

  • 9. 
    Which one is the auxiliaries’ component in fixed appliance?
    • A. 

      Power chain

    • B. 

      Brackets

    • C. 

      Wire

    • D. 

      Molar bend

  • 10. 
    What is the clinical feature of fixed appliance?
    • A. 

      Bonded bracket to the teeth

    • B. 

      Fixed brackets to removable appliance

    • C. 

      Bonded bracket to an appliance

    • D. 

      The appliance that can be remove

  • 11. 
    What is the most common appliances to avoid for adult orthodontic?
    • A. 

      Head Gear and Face Mask

    • B. 

      Removable appliance

    • C. 

      Fixed appliance

    • D. 

      Lingual brace

  • 12. 
    What is the problem can increased risk of root resorption:?
    • A. 

      No vital or root treated

    • B. 

      Long roots.

    • C. 

      Previously caries

    • D. 

      Light forces

  • 13. 
    What is the risk of orthodontic treatment?
    • A. 

      Root resorption

    • B. 

      Carries

    • C. 

      Periodontal disease

    • D. 

      Bone fracture

  • 14. 
    What is the most comment risk in orthodontic treatment?
    • A. 

      Relapse

    • B. 

      Retention

    • C. 

      Over correction

    • D. 

      Good digitation

  • 15. 
    What is the meaning of balancing extraction?
    • A. 

      Extraction Both side in one arch

    • B. 

      Extraction upper and lower tooth in both side

    • C. 

      Extraction upper and lower tooth in one side

    • D. 

      Both side in two arches

  • 16. 
    What is the meaning of compensating extraction?
    • A. 

      Upper and lower teeth in both arches

    • B. 

      Upper and lower tooth in one side

    • C. 

      Both side in one arch

    • D. 

      Both side in two arches

  • 17. 
    Why we use retainer after finishing orthodontic treatment?
    • A. 

      Preventing teeth relapse

    • B. 

      Allow teeth eruption

    • C. 

      Allow growth change

    • D. 

      Prevent 3rd molars eruption

  • 18. 
    What is the factor related to retention to be consider at the treatment planning stage?
    • A. 

      Type of retention

    • B. 

      Growth spurt

    • C. 

      Extraction decision

    • D. 

      Growth modification

  • 19. 
    Which one the factor may modify retention protocol?
    • A. 

      Lower incisors alignment

    • B. 

      Crowding

    • C. 

      Missing teeth

    • D. 

      Dental caries

  • 20. 
    What is the condition that requires short term retention?
    • A. 

      Deep bite

    • B. 

      Expanded arches

    • C. 

      Serial extraction procedures

    • D. 

      Midline shift

  • 21. 
    Which condition that require long term retention?
    • A. 

      Severe rotation

    • B. 

      High place canines in class one extraction cases

    • C. 

      Posterior cross bite in patients having step cusp

    • D. 

      Extraction cases

  • 22. 
    Which condition that does not require retention?
    • A. 

      Anterior cross bite

    • B. 

      Sever rotation

    • C. 

      Median diastema

    • D. 

      Deep bite

  • 23. 
    Which classification of malocclusion, Over jet is increased?
    • A. 

      Class II division 1 malocclusion

    • B. 

      Class III malocclusion

    • C. 

      Class II division 2 malocclusion

    • D. 

      Class I malocclusion

  • 24. 
    Which one is the Over jet of Class I malocclusion?
    • A. 

      Upper incisors are Proclined and OJ =3mm

    • B. 

      Upper incisors are Proclined and OJ < 2mm

    • C. 

      Upper incisors are Retroclined OJ = 1mm

    • D. 

      Upper incisors are Proclined and OJ>4mm

  • 25. 
    Which one the most likely the Over jet of Class II division1 malocclusion?
    • A. 

      Upper incisors are Proclined, OJ>4mm

    • B. 

      Upper incisors are Proclined, OJ < 2mm

    • C. 

      Upper incisors are Retroclined , OJ = 1mm

    • D. 

      Upper incisors are Proclined, OJ =3mm

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