Exam (elaborations)
RDAEF2 PRACTICE WRITTEN QUESTIONS & ANSWERS
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RDAEF2 PRACTICE WRITTEN QUESTIONS & ANSWERS
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RDAEF2 PRACTICE WRITTEN QUESTIONS &ANSWERS
Define General supervision?
General supervision means that you must be employed by dentist, but that dental does
not have to be present in the treatment facility during a procedure you are performing.
Define Direct supervision?
Direct supervision means that you must be employed by a dentist and the dentist does
have to be present in the treatment facility during a procedure you are performing.
Does assisting in the administration of nitrous oxide require a special type of
supervision?
Assisting in the administration of nitrous oxide requires the supervising dentist be in the
room, at chairside during the procedure, giving directions to the dental assistant.
What should you do if you are asked to perform illegal procedure?
Inform a dentist the procedure is an infraction of the dental practice act and refuse to
perform the procedure.
Whos responsibility is it to adhere to the Board regulations in regard to DA/RDA
function?
Both you and your supervising dentist. you are legally responsible for adhering to Board
regualtions, and you could lose your license or have it suspended for illegally
performing a function.
How many C.E. units are you required to earn each renewal period?
25units
Are there any RDA functions that require a special license?
Yes Coronal Polish, ultrasonic scaler and pit and fissure sealants require special
licensure.
What is the purpose of a matrix band?
A matrix band is used to replaced the missing proximal wall of the tooth preparation
Where is the band placed?
Between the interdental papilla and the proximal surface of the tooth
What corresponding tooth would a band fit that was set-up for tooth #28?
,Tooth #12
What can be used to secure the band in place?
Low fusing compound
What is the purpose of a contra-angle matrix retainer?
A contra-angle retainer can be placed from the lingual
How far should the band extend above the occlusal height and below the gingical seat
of the prepation?
1-3mm above the occlusal height and approximately 1mm below the gingival seat.
Would you need to use a matrix band on a class I cavity prep?
No, a class I already has surrounding tooth structure to support thee placement of a
filling.
What is the shape of most commerical wedges and what is the purpse of a wedge?
Wedges are triangular in shape and placed with base toward the gingival tissue. The
purpose of a wedge is to press the band tightly against the prepared tooth and to slighty
open the contact of the adjacent tooth during placement of the restoration.
Are there any specific C.E requirments you must complete other than the number of
hours?
Yes you need to maintain CPR certification, and attend board approved courses in the
Dental practice Act, and Infection control.
What is the purpose of a cavity varnish or sealer?
To seal the dental tubules from harmful substances such as mercury in amalgam and
acids from cements
Why should a varnish NOT be used under a resin or composite filling, but why can a
sealer be used?
Varnishes interfere with the polymerization of resins; however, sealers can be used
because theyre part of bonding process and do not interfere with the polymerization
Who may apply a cavity varnish or sealer, and what type of supervision is required?
RDA, direct supervision
If you are using a base, when should you place a varnish or sealer?
If what you are placing into the tooth is harmful to the tooth, place a varnish or sealer
first. If what youre placing into the tooth is not harmful, place a varnish or sealer
afterwards
,Why should you wipe the base placement instrument on a 2X2 gauze in between the
transfer of material back and forth from the mouth to the mixing pad?
Transferring heat and moisture from the mouth to the mixing pad during several
applications will cause material to set-up on the pad. Wiping the instrument will reduce
this process
Who apply bases and liners to exposed or near exposed pulps?
RDA, RDAEF and dentist
Where should a base be placed?
A based should be placed to fill-in the deepest indentation area, or cover the entire
floor. there are several ways to perform this procedure; you should follow the direction
of your particular dentis
Who may place a temporary sedative dressing?
RDA, Dentist
Is it necessary to use a matrix band on a class II temporary dressing?
Yes
Of the following, which is the least important factor when judging the quality of a
temporary filling; sealed margins, correct occlusion, contact points,correct anatomy?
Correct Anatomy
The doctor is away, you are an RDA, a patient comes into office and says they have lost
their temporary filling. What should you do?
Refer to another dentist or make a new appointment if the patient is not in pain
What is the nest cement to use for a sedative(palliative) filling?
Zinc oxide eugenol
What are some important considerations when selecting a cement?
Purpose, duration of the restoration, depth of the preparation
Why wouldnt zinc phosphate cement be a good choice for a temporary filling or base in
a deep cavity prepartion?
Zinc phosphate is acidic and could cause pulpal irritation
How should you mix zinc phosphate cement and why?
Zinc phosphate is mixed on a cool glass slab, in small increments, over a large area, to
dissipate heat and acid
, How do you mix glass ionomer cement and what is an important ingredient of this
cement?
Glass ionomer cement is mixed on a paper pad within 30secs. this cement contains
fluoride that helps reduce the possibility of new cavities
What are the important considerations when preparing a temporary crown?
The temporary crown should reproduce the mesial/distal length, occlusal height, buccal-
lingual width, and contact points of the tooth it is replacing
How far subgingivally should a crown fit?
Approximately 1mm or to the prepared margin of the tooth
What is the purpose of crimping the margins of a temporary metal crown?
Crimping the margins of the crown causes the crown to fit more snugly for better tissue
health and to reduce the possibility of bacteria entering beneath the crown
Who may place a temporary crown?
RDA, Dentist decides
Under what circumstances may an RDA remove Subgingival cement?
An RDA may remove cement from all tooth surfaces
What are the components of resin material used for temporary crowns?
Polymer-powder and monomer-liquid=polymerization. The new BISGMA resins are
actually a type of composite and made of the same type of materials
How can you add depth to an impression tray?
Add orthodontic tray wax to the margins of the tray
Who may take impressions for crown and bridge?
The dentist and the RDAEF/RDHEF not RDA
Why might an alginate mix appear lumpy?
Not correctly spatulated, or too much powder or too little water
What might cause alginate impression material to stick to the teeth?
The material was not completely set before the tray was removed
What would cause void spaces in an impression?
Air in the mix, air folded into the tray or saliva bubbles
What would using hot water in an alginate mix cause?
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