EFDA BOARD EXAM 220 QUESTIONS & CORRECT
ANSWERS LATEST 2025
What agent is used in topical anesthetic? - ANSWER-Benzocaine
How long should topical anesthetic be placed for more profound soft tissue
analgesia? - ANSWER-60 to 90 seconds
Dry angles are an effective way to control saliva secretions from - ANSWER-
stensen's duct
what type of ZOE lacks strength and long-term durability? - ANSWER-type I
(temporary cement)
This type of cement is a hybrid of silicate and polycarboxilate cement - ANSWER-
glass ionomer
what material is supplied as a paste/paste system and also in cartridges? -
ANSWER-polyether
What does the term elastomeric mean? - ANSWER-having elastic or rubber-like
qualities
an alginate absorbing excess water is termed what? - ANSWER-imbibition
,what is a final impression used for? - ANSWER-an accurate reproduction of teeth
and surrounding tissue
what is the negative reproduction of dental arches and surrounding tissues? -
ANSWER-impression
at what point in a procedure is a mylar matrix placed? - ANSWER-before etching
the retainer (toffelmire) is positioned from what surface? - ANSWER-buccal
Where is the wedge inserted to position the matrix band firmly against the
gingival margin? - ANSWER-lingual embrasure
what instruments are used to contour a matrix band? - ANSWER-burnisher or
mirror handle
a matrix band is made of what? - ANSWER-thin flexible steel
what stabilizes the tofflemire matrix band? - ANSWER-wooden wedge
what type of stain can chlorhexidine cause? - ANSWER-extrinsic
most common type of temporary coverage for crown and bridge? - ANSWER-
custom provisional
, why only intermittent pressure of a tooth when polishing? - ANSWER-heat
dissipates between strokes
Course, extra course, medium, fine and extrafine are different _____ of polishing
paste? - ANSWER-grit
removal of calculus, debris, stain, and plaque from teeth - ANSWER-oral
prophylaxis
where on the tooth do you begin to use prophy cup? - ANSWER-gingival third
what is the different between catalyst and a base? - ANSWER-Base- basic
ingredient of material
catalyst- increases the rate of chemical reaction (makes it set)
Would you use a polymer crown on an anterior tooth? why? - ANSWER-yes,
because its tooth colored
What is a class I cavity - ANSWER-decay in pits and fissures of occlusal surface
What is a class II cavity - ANSWER-decay on proximal (mesial or distal) surfaces of
premolars and molars
What is a class III cavity? - ANSWER-decay in proximal surfaces (Mesial or distal)
of incisors and canines
ANSWERS LATEST 2025
What agent is used in topical anesthetic? - ANSWER-Benzocaine
How long should topical anesthetic be placed for more profound soft tissue
analgesia? - ANSWER-60 to 90 seconds
Dry angles are an effective way to control saliva secretions from - ANSWER-
stensen's duct
what type of ZOE lacks strength and long-term durability? - ANSWER-type I
(temporary cement)
This type of cement is a hybrid of silicate and polycarboxilate cement - ANSWER-
glass ionomer
what material is supplied as a paste/paste system and also in cartridges? -
ANSWER-polyether
What does the term elastomeric mean? - ANSWER-having elastic or rubber-like
qualities
an alginate absorbing excess water is termed what? - ANSWER-imbibition
,what is a final impression used for? - ANSWER-an accurate reproduction of teeth
and surrounding tissue
what is the negative reproduction of dental arches and surrounding tissues? -
ANSWER-impression
at what point in a procedure is a mylar matrix placed? - ANSWER-before etching
the retainer (toffelmire) is positioned from what surface? - ANSWER-buccal
Where is the wedge inserted to position the matrix band firmly against the
gingival margin? - ANSWER-lingual embrasure
what instruments are used to contour a matrix band? - ANSWER-burnisher or
mirror handle
a matrix band is made of what? - ANSWER-thin flexible steel
what stabilizes the tofflemire matrix band? - ANSWER-wooden wedge
what type of stain can chlorhexidine cause? - ANSWER-extrinsic
most common type of temporary coverage for crown and bridge? - ANSWER-
custom provisional
, why only intermittent pressure of a tooth when polishing? - ANSWER-heat
dissipates between strokes
Course, extra course, medium, fine and extrafine are different _____ of polishing
paste? - ANSWER-grit
removal of calculus, debris, stain, and plaque from teeth - ANSWER-oral
prophylaxis
where on the tooth do you begin to use prophy cup? - ANSWER-gingival third
what is the different between catalyst and a base? - ANSWER-Base- basic
ingredient of material
catalyst- increases the rate of chemical reaction (makes it set)
Would you use a polymer crown on an anterior tooth? why? - ANSWER-yes,
because its tooth colored
What is a class I cavity - ANSWER-decay in pits and fissures of occlusal surface
What is a class II cavity - ANSWER-decay on proximal (mesial or distal) surfaces of
premolars and molars
What is a class III cavity? - ANSWER-decay in proximal surfaces (Mesial or distal)
of incisors and canines
