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Dental Assisting Exam Preparation: Questions and Answers for EFDA Board Certification, Exams of Dentistry

Central Penn CollegeDentistry

A comprehensive set of questions and answers designed to help aspiring efda (expanded functions dental assistant) candidates prepare for their board certification exam. It covers a wide range of topics related to dental procedures, materials, and patient care, including cavity preparation, composite restorations, amalgam, sealants, fluoride application, and occlusion. A valuable resource for students seeking to enhance their knowledge and understanding of dental assisting principles and practices.

Typology: Exams

2024/2025

Available from 04/16/2025

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PA EFDA BOARD QUESTIONS WITH 100% VERIFIED
CORRECT ANSWERS 2025/2026 LATEST UPDATE
"V-shaped space between proximal surfaces of two adjoining teeth - CORRECT ANSWER
Gingival embrasure and incisal embrasure"
"Non-working cusps - CORRECT ANSWER Maxillary buccal cusps and mandibular lingual
cusps"
"An automatic is used for which class of restoration - CORRECT ANSWER Class II"
"Which matrix band should not be used for a class II amalgam - CORRECT ANSWER Mylar
matrix"
"Should varnish be placed on wet or dry tooth structure - CORRECT ANSWER Dry"
"Varnish is considered - CORRECT ANSWER A sealer"
"Zinc Polyacrylate Cement - CORRECT ANSWER Needs varnish placed first"
"The tofflemire band is extended __ to __mm occlusal to the junction of the occlusal and lingual
surfaces - CORRECT ANSWER 0.5mm to 1.5mm"
"Bond between the tooth (tubules) and the unfilled resin (bond) - CORRECT ANSWER
Mechanical bond"
"Bond between the composite (filled resin) and bond (unfilled resin) - CORRECT ANSWER
Chemical bond"
"Fluoride trays must - CORRECT ANSWER Cover the last molar"
"Dental sealants using etch - CORRECT ANSWER Chemical bond"
"What causes amalgam to be soupy - CORRECT ANSWER Over mixing"
"When carving a class V, contacting the occlusal/incisal wall and gingival wall at the same time
will result in - CORRECT ANSWER Flatten restoration"
"Rampant decay, interproximal lesions, various lesion on occlusal, old tooth with no decay -
CORRECT ANSWER Contra-indications for sealants"
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Download Dental Assisting Exam Preparation: Questions and Answers for EFDA Board Certification and more Exams Dentistry in PDF only on Docsity!

PA EFDA BOARD QUESTIONS WITH 100% VERIFIED

CORRECT ANSWERS 2025/ 2026 LATEST UPDATE

"V-shaped space between proximal surfaces of two adjoining teeth - CORRECT ANSWER

Gingival embrasure and incisal embrasure"

"Non-working cusps - CORRECT ANSWER Maxillary buccal cusps and mandibular lingual

cusps"

"An automatic is used for which class of restoration - CORRECT ANSWER Class II"

"Which matrix band should not be used for a class II amalgam - CORRECT ANSWER Mylar

matrix"

"Should varnish be placed on wet or dry tooth structure - CORRECT ANSWER Dry"

"Varnish is considered - CORRECT ANSWER A sealer"

"Zinc Polyacrylate Cement - CORRECT ANSWER Needs varnish placed first"

"The tofflemire band is extended __ to __mm occlusal to the junction of the occlusal and lingual

surfaces - CORRECT ANSWER 0.5mm to 1.5mm"

"Bond between the tooth (tubules) and the unfilled resin (bond) - CORRECT ANSWER

Mechanical bond"

"Bond between the composite (filled resin) and bond (unfilled resin) - CORRECT ANSWER

Chemical bond"

"Fluoride trays must - CORRECT ANSWER Cover the last molar"

"Dental sealants using etch - CORRECT ANSWER Chemical bond"

"What causes amalgam to be soupy - CORRECT ANSWER Over mixing"

"When carving a class V, contacting the occlusal/incisal wall and gingival wall at the same time

will result in - CORRECT ANSWER Flatten restoration"

"Rampant decay, interproximal lesions, various lesion on occlusal, old tooth with no decay -

CORRECT ANSWER Contra-indications for sealants"

"Coalesced means? - CORRECT ANSWER Comes together"

"What tooth has two Buccal grooves - CORRECT ANSWER Mandibular first molar"

"Touching together of the upper and lower teeth when jaws are closed - CORRECT ANSWER

Centric occlusion"

"What separates Buccal and lingual cusps on maxillary first premolar - CORRECT ANSWER

Central groove"

"Facial and lingual ridge join to form - CORRECT ANSWER Transverse ridge"

"When polishing composite go from - CORRECT ANSWER Coarse to fine"

"Elevated crests of enamel that form mesial and distal margins of the occlusal surface -

CORRECT ANSWER Marginal ridges"

"What portion of class V should be carved free handed - CORRECT ANSWER Middle third"

"How many hours of CE do EFDAS need - CORRECT ANSWER 10 hours"

"Carious lesion located on anterior - CORRECT ANSWER Class III"

"What distinguishes composites - CORRECT ANSWER Particle size"

"Movement of jaw from left to right - CORRECT ANSWER Excursive movement"

"Height of contour on Buccal of posterior is at - CORRECT ANSWER Cervical third"

"Another name for "mottled enamel" - CORRECT ANSWER Dental fluorosis"

"Everything should be dispensed according to what? - CORRECT ANSWER Manufacturers

instruction"

"The bulk of the tooth is made up of - CORRECT ANSWER dentin"

"Vertical overlap of maxillary incisors - CORRECT ANSWER Deep bite/over bite"

"Fluoride varnish of 2.26% is used for - CORRECT ANSWER Children younger than 6"

"Sitting chair side making the temporary and trying it in (block and shell) - CORRECT ANSWER

Direct temporary"

"Using a preliminary impression and lab to make a temporary - CORRECT ANSWER Indirect

temporary"

"Which type of restoration bonds directly to enamel and dentin - CORRECT ANSWER

Composite"

"Mercury is most dangerous - CORRECT ANSWER Before it is triturated and mixed with other

metals"

"Acid etch used with sealants - CORRECT ANSWER 35%-39% acid"

"PRR sealant - CORRECT ANSWER Mechanical bond"

"Opening up the fissures using a drill and filling with resin - CORRECT ANSWER Preventative

resin restoration (PRR)"

"When does EFDA license expire? - CORRECT ANSWER March 31 of every odd year"

"How soon should you report suspected child abuse - CORRECT ANSWER Immediately"

"How many CE credits needed for EFDA - CORRECT ANSWER 10"

"How many days of notification if you are moving or have a name change - CORRECT ANSWER

"Hybrid composite - CORRECT ANSWER 70 - 80% inorganic filler"

"Microfill composite - CORRECT ANSWER 35 - 50% inorganic filler"

"Conventional composite - CORRECT ANSWER 75 - 80% inorganic filler"

"Micro-hybrid composite - CORRECT ANSWER Best esthetics and high strength"

"How often should you check curing light - CORRECT ANSWER Weekly"

"Where is the height of contour - CORRECT ANSWER Middle third"

"Bilateral and even occlusal contact, anterior and canine guidance, unobstructed envelope of

function - CORRECT ANSWER Rules of occlusion"

"Amalgam metals - CORRECT ANSWER Mercury, zinc, tin, copper, silver"

"When condensing amalgam you should used _____ strokes and ____lb of pressure - CORRECT

ANSWER Overlapping, 8-10"

"What part to you fill of a class II first? - CORRECT ANSWER The box"

"When does amalgam become toxic - CORRECT ANSWER When it's heated (airborne)"

"When mixed properly amalgam should be - CORRECT ANSWER Dull and velvety"

"Steps for a sealant - CORRECT ANSWER Clean tooth with pumice, isolation, etch, apply

sealant, cure, check margins"

"rampant decay - CORRECT ANSWER Decay that develops rapidly and is widespread

throughout the mouth"

"recurrent decay - CORRECT ANSWER Decay under margins of fillings or crowns"

"arrested decay - CORRECT ANSWER lesion that becomes stationary and does not progress"

"Acidulated phosphate fluoride percentage - CORRECT ANSWER 1.23%"

"Strannous fluoride percentage - CORRECT ANSWER 0.4%"

"Which fluoride can be applied to a wet or dry field - CORRECT ANSWER Varnish"

"Maxillary non working cusps - CORRECT ANSWER Buccal"

"Distal triangular fossa on maxillary first molar is separated from the central fossa by the -

CORRECT ANSWER oblique ridge"

"Restoring a class II with too large an increment of composite at once can cause post-op

sensitivity due to - CORRECT ANSWER insufficient curing of the composite"

"Areas of continuing ED not accepted - CORRECT ANSWER areas that do not pertain directly

to your job description"

"If you suspect child abuse phone in reports - CORRECT ANSWER immediately"

"Structure that covers anatomical crown - CORRECT ANSWER Enamel"

"Strength and wear rates of a composite are critical to consider when selecting a material for

placement of what class for stength - CORRECT ANSWER Class I and II"

"Function of obtudents - CORRECT ANSWER Diminish dentin sensitivity"

"Formed along the junction of two walls - CORRECT ANSWER Line angle"

"Most versatile composite - CORRECT ANSWER Micro hybrid"

"In a cement system is what is the monomer and what is the polymer - CORRECT ANSWER

Liquid is the monomer, powder is the polymer" "The ridge formed by the union of two triangular ridges that extend across the surface of

posterior teeth - CORRECT ANSWER Transverse ridge"

"The uncut tooth structure adjacent to the cavity prep - CORRECT ANSWER Cavosurface

margin"

"Resin ionomer - CORRECT ANSWER Mix of composite and glass ionomer"

"Fluoride varnish is used with which group of patients? - CORRECT ANSWER Children 6 years

old or older"