The Ultimate RDA (Registered Dental Assistant) Practice Exam

230 Questions | Total Attempts: 7646

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The Ultimate RDA (Registered Dental Assistant) Practice Exam

Only the candidates who have graduated from an approved RDA educational program or the ones who have completed a dentist-licensed 15-months of satisfactory enough work experience as a dental assistant are eligible to qualify for RDA examinations. It's not an easy road but more hard work and expertise. This test will surely help you in achieving your goal.


Questions and Answers
  • 1. 
    • A. 

      Buccal tubes

    • B. 

      Bracket

    • C. 

      Archwire

    • D. 

      Springs

  • 2. 
    The __ wraps around the bracket and is tightened by twisting
    • A. 

      Archwire

    • B. 

      Ligature wire

    • C. 

      Spring

    • D. 

      Separator

  • 3. 
    __ are attached to hooks/buttons that are secured on the band/brackets
    • A. 

      Springs

    • B. 

      Tooth positioners

    • C. 

      Elastic separators

    • D. 

      Elastics

  • 4. 
    After the premature loss of a primary tooth, which special fixed appliance is worn to maintain a space for the permanent tooth
    • A. 

      Bracket

    • B. 

      Space maintainers

    • C. 

      Headgear

    • D. 

      Activator

  • 5. 
    Which removable appliance, usually worn for a specific number of hours each day, is used to apply force to move teeth, restrain or alter cranial facial bone growth, and reinforce the stability of intraoral appliances
    • A. 

      Space maintainer

    • B. 

      Headgear

    • C. 

      Activator

    • D. 

      Tooth positioner

  • 6. 
    __ means that the tooth is in a distal to normal position
    • A. 

      Linguoversion

    • B. 

      Distoversion

    • C. 

      Mesioversion

    • D. 

      Infraversion

  • 7. 
    __ means that the tooth is tipped toward the lip or cheek
    • A. 

      Torsoversion

    • B. 

      Labioversion

    • C. 

      Transversion

    • D. 

      Linguoversion

  • 8. 
    __ causes of malocclusion include systemic disease and nutritional disturances that upset the normal schedule of dentition development during infancy and early childhood
    • A. 

      Local factor

    • B. 

      Systemic factor

    • C. 

      Developmental factor

    • D. 

      Environmental factor

  • 9. 
    The teeth are retained in position through the process of __, which created and deposits new cells
    • A. 

      Resorption

    • B. 

      Deposition

    • C. 

      Transposition

    • D. 

      Disposition

  • 10. 
    __ are placed in the contact are between the teeth, forcing the teeth to spread to accomodate the orthodontic bands
    • A. 

      Separators

    • B. 

      Plastic rings

    • C. 

      Brackets

    • D. 

      Springs

  • 11. 
    A __ is an abnormal relationship of a tooth or a group of teeth in one arch to the opposing
    • A. 

      Underjet

    • B. 

      Cross-bite

    • C. 

      Overjet

    • D. 

      Open bite

  • 12. 
    When the vertical overlap of the maxillary teeth is greater than the incisal one third of the mandibular anterior teeth, this is termed
    • A. 

      Overjet

    • B. 

      Overbite

    • C. 

      Underjet

    • D. 

      Cross-bite

  • 13. 
    An abnormal horizontal distance between the labial surface of the mandibular anterior teeth and the lavial surface of the maxillary anterior teeth is called 
    • A. 

      Overjet

    • B. 

      Overbite

    • C. 

      Open bite

    • D. 

      Cross bite

  • 14. 
    Which of the folllowing is not considered a removable appliance
    • A. 

      Headgear

    • B. 

      Palatal expansion appliance

    • C. 

      Retainer

    • D. 

      Activator

  • 15. 
    During the __ phase, the development of various tissues takes place
    • A. 

      Morphodifferentiation

    • B. 

      Cytodifferentiation

    • C. 

      Histodifferentiation

    • D. 

      Nasolacrimal

  • 16. 
    In which week of the prenatal developemnt will the face begin to form
    • A. 

      12

    • B. 

      4

    • C. 

      16

    • D. 

      9

  • 17. 
    In the facial development phase, which stage is responsible for forming the upper portion of the face, forehead, eyes, and nose
    • A. 

      Medial nasal

    • B. 

      Mandibular process

    • C. 

      Frontonasal process

    • D. 

      Stomedeum

  • 18. 
    In the facial developmental phase, which stage is responsible for forming the cheeks, sides of the upper lip, and maxilla
    • A. 

      Medial nasal

    • B. 

      Mandibular process

    • C. 

      Frontonasal process

    • D. 

      Stomedeum

  • 19. 
    Which factors can initiate malformation in the unborn child
    • A. 

      Genetics

    • B. 

      Environment

    • C. 

      Drugs

    • D. 

      Infections

    • E. 

      All of the above

  • 20. 
    Fetal alcohol symptoms (fas) in an infant are a result of the mother
    • A. 

      Contracting infections

    • B. 

      Persisting in alcohol consumptions

    • C. 

      Contracting syphilis

    • D. 

      Being exposed to measles

  • 21. 
    If a cleft lip occurs on both sides of the lip, it is called
    • A. 

      Unilateral

    • B. 

      Bilateral

    • C. 

      Complete

    • D. 

      Parkal

  • 22. 
    The first stage of the life cycle of the tooth is called
    • A. 

      Initiation

    • B. 

      Lamina

    • C. 

      Odontogenesis

    • D. 

      Proliferation

  • 23. 
    Enamel-forming cells are called
    • A. 

      Odontoblasts

    • B. 

      Cementoblasts

    • C. 

      Ameloblasts

    • D. 

      Buds

  • 24. 
    The last development stage before eruption is
    • A. 

      Initiation

    • B. 

      Calcification

    • C. 

      Attrition

    • D. 

      Proliferation

  • 25. 
    • A. 

      Initiation

    • B. 

      Proliferation

    • C. 

      Calcification

    • D. 

      Attrition