Expanded Functions Dental Assistants {EFDA} FINAL EXAM STUDY
GUIDE | COMPLETE 2025–2026 REVIEW | 120 VERIFIED QUESTIONS
& A+ CLINICAL ANSWERS
This all-in-one EFDA study guide is your go-to resource for acing the final exam
and mastering hands-on clinical procedures. It breaks down critical skills and
knowledge areas like placing and carving restorations, applying fluoride,
taking accurate impressions, and assisting in crown and bridge procedures.
Whether you’re reviewing for your certification exam or brushing up for end-of-
course testing, this guide gives you straightforward answers, real-world
scenarios, and practice-based knowledge used by successful dental assistants
across the country.
What is the name of the dental condition that results from too much fluoride?
a. Demineralization
b. Remineralization
c. Fluorosis
d. Enamel Hyperplasia
c. Fluorosis
Systemic fluoride is most effective after teeth have fully erupted.
a. True
b. False
b. False
Which of the following is not recommended when applying a fluoride varnish?
a. Use dental floss through contacts to draw the fluoride varnish interproximally.
b. Thoroughly dry the teeth.
c. Use a cotton-tip applicator or brush.
b. Thoroughly dry the teeth.
,Systemic fluoride is the type of fluoride found in:
a. fluoride gel.
b. fluoridated mouth rinses.
c. fluoridated toothpaste.
d. fluoridated water, food and supplements.
d. fluoridated water, food and supplements.
The teeth DO NOT NEED to be dried prior to placement of foam/gel topical fluoride.
a. True
b. False
b. False
What is the process by which fluoride prevents decay?
a. Slowing demineralization and enhancing remineralization are the processes by which fluoride
prevents decay.
b. Speeding up demineralization and slowing remineralization are the processes by which fluoride
prevents decay.
a. Slowing demineralization and enhancing remineralization are the processes by which fluoride
prevents decay.
Before topical fluoride gel is applied, the:
a. dental chair is reclined to 45 degrees.
b. teeth must be free of all plaque.
c. teeth must be free of calculus.
d. patient's head should be tilted back.
c. teeth must be free of calculus.
, Topical fluoride is applied directly to the teeth through the use of fluoridated toothpastes and
mouth rinses and topical applications of rinses, gels, foams, and varnishes.
True
b. False
a. True
Sealants are indicated for which areas?
a. Cervical one third of any tooth
b. The smooth surfaces of teeth but not pits and fissures
c. Posterior but not anterior teeth
d. Pits and fissures
d. Pits and fissures
The first step in placing dental sealants is to _____ the surface.
a. prime
b. clean
c. etch
d. isolate
b. clean
Which type of sealant is polymerized by chemical reaction?
a. Cold-cured
b. Light-cured
c. Sef-cured
d. Dual-cured
c. Self-cured
GUIDE | COMPLETE 2025–2026 REVIEW | 120 VERIFIED QUESTIONS
& A+ CLINICAL ANSWERS
This all-in-one EFDA study guide is your go-to resource for acing the final exam
and mastering hands-on clinical procedures. It breaks down critical skills and
knowledge areas like placing and carving restorations, applying fluoride,
taking accurate impressions, and assisting in crown and bridge procedures.
Whether you’re reviewing for your certification exam or brushing up for end-of-
course testing, this guide gives you straightforward answers, real-world
scenarios, and practice-based knowledge used by successful dental assistants
across the country.
What is the name of the dental condition that results from too much fluoride?
a. Demineralization
b. Remineralization
c. Fluorosis
d. Enamel Hyperplasia
c. Fluorosis
Systemic fluoride is most effective after teeth have fully erupted.
a. True
b. False
b. False
Which of the following is not recommended when applying a fluoride varnish?
a. Use dental floss through contacts to draw the fluoride varnish interproximally.
b. Thoroughly dry the teeth.
c. Use a cotton-tip applicator or brush.
b. Thoroughly dry the teeth.
,Systemic fluoride is the type of fluoride found in:
a. fluoride gel.
b. fluoridated mouth rinses.
c. fluoridated toothpaste.
d. fluoridated water, food and supplements.
d. fluoridated water, food and supplements.
The teeth DO NOT NEED to be dried prior to placement of foam/gel topical fluoride.
a. True
b. False
b. False
What is the process by which fluoride prevents decay?
a. Slowing demineralization and enhancing remineralization are the processes by which fluoride
prevents decay.
b. Speeding up demineralization and slowing remineralization are the processes by which fluoride
prevents decay.
a. Slowing demineralization and enhancing remineralization are the processes by which fluoride
prevents decay.
Before topical fluoride gel is applied, the:
a. dental chair is reclined to 45 degrees.
b. teeth must be free of all plaque.
c. teeth must be free of calculus.
d. patient's head should be tilted back.
c. teeth must be free of calculus.
, Topical fluoride is applied directly to the teeth through the use of fluoridated toothpastes and
mouth rinses and topical applications of rinses, gels, foams, and varnishes.
True
b. False
a. True
Sealants are indicated for which areas?
a. Cervical one third of any tooth
b. The smooth surfaces of teeth but not pits and fissures
c. Posterior but not anterior teeth
d. Pits and fissures
d. Pits and fissures
The first step in placing dental sealants is to _____ the surface.
a. prime
b. clean
c. etch
d. isolate
b. clean
Which type of sealant is polymerized by chemical reaction?
a. Cold-cured
b. Light-cured
c. Sef-cured
d. Dual-cured
c. Self-cured
