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RDAEF2 CA EXAM QUESTIONS AND ANSWERS
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RDAEF2 CA EXAM QUESTIONS AND ANSWERS
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RDAEF2 CA EXAM QUESTIONS AND ANSWERSProper finishing, polishing, and cleaning of tooth structures and restorative materials
_________ restorative material.
A. improves the esthetics
B. improves the tissue health
C. increases the longevity - Answers -A, B, & C are correct
Which of the following sca les ranks materials by their relative resistance to abrasion?
A. Brinell
B. Moh
C. Vickers
D. Knoop - Answers -B. Moh
Which of the following is true concerning the hardness of porcelain relative to enamel
and dentin?
A. Porcelain is harder than enamel and dentin.
B. Porcelain is harder than enamel but softer than dentin.
C. Porcelain is harder than dentin but softer than enamel.
D. Por celain is softer than enamel and dentin. - Answers -A. Porcelain is harder than
enamel and dentin.
Abrasive particles that are _____ will cut more efficiently.
A. large and regular
B. large and irregular
C. small and regular
D. small and irregular - Answers -B. large and irregular
Which statement explains how fine-particle diamonds are suppli ed?
A. Bonded to rotary cutting shanks or disks
B. Found in designs ranging from 7 to 30 cutting flutes
C. Supplied on rotary disks and handheld finishing strips
D. Supplied in a paste for polishing composite and porcelain restorations - Answers -D.
Supplied in a paste for polishing composite and porcelain restorations
The powder form of is used in sandblasting restorations in preparation for cementation
and air abrasion.
A. tin oxide
B. silicon dioxide
C. silicon carbide
D. aluminum oxide - Answers -D. aluminum oxide
Which of the following is correct about pumice?
A. Frequently found in block form, which is then run onto a rag wheel to polish precious
and semiprecious metal alloys in the laboratory
, B. Used in coated disks and bonded rotary devices primarily used in finishing
procedures
C. A major component of many prophylaxis pastes used to polish tooth structure, dental
amalgam, and acrylic bases
D. Used to smooth enamel,or finish metal
alloys and ceramic materials - Answers -C. A major component of many prophylaxis
pastes used to polish tooth structure, dental amalgam, and acrylic bases
When using hand instruments for margination, use very sharp instruments and begin
___ margin of the restoration, using a shaving motion in ___ overlapping strokes.
A. coronal;horizontal
B. coronal vertical
C. apical;diagonal
D. apical;vertical - Answers -C. apical;diagonal
Which of the following materials is/are recommended for polishing of composite
restorations?
A. Air-polishing devices
B. Traditional prophy pastes
C. Ultrasonic and sonic scalers
D. Aluminum oxide polishing paste - Answers -D. Aluminum oxide polishing paste
Which of the following is correct regarding staining at the margins of composite
restorations due to microleakage?
A. Easily removed with traditional prophy paste
B. Cannot be polished away
C. Should be removed with an air-polishing device
D. Can be removed by polishing for an extended length of time (longer than 5 minutes) -
Answers -B. Cannot be polished away
Which of the following may be used to remove biofilm from implants without abrading
the surface of the titanium?
A. Metal hand instruments
B. Special plastic hand instruments
C. Plastic sheaths for ultrasonic scalers
D. Nonabrasive paste or tin oxide - Answers -B,C,D are correct
A ir polishing utilizes a combination of air,and water at a pressure of approximately 40
psi as an effective and efficient means of removing stains and soft deposits from
enamel surfaces.
A. sodium hypochlorite
B. aluminum oxide
C. sodium bicarbonate
D. dilute acids - Answers -C. sodium bicarbonate
Which of the following is true of microabrasion?
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