EFDA Certification Exam 2026: Comprehensive Expanded Functions
Dental Assistant Practice Test — Restorative Procedures, Dental
Materials, Infection Control, Clinical Techniques, Patient Safety &
Dental Regulations — 195 Multiple-Choice Questions with Answers
& Detailed Rationales
Section 1: Patient Assessment and Diagnosis (Questions 1-25)
Question 1
A patient presents for a restorative appointment. As part of the assessment, you are
responsible for obtaining a medical history. The patient reports they have a heart murmur
and take prophylactic antibiotics before dental procedures. Which of the following is the
most critical piece of information to confirm with the patient or their physician?
A. The specific type of murmur they have.
B. The exact dosage and timing of the antibiotic regimen.
C. The name of the cardiologist who prescribed the antibiotics.
D. The date of their last dental cleaning.
Correct Answer: B
Explanation: Confirming the exact antibiotic regimen is crucial to ensure effective
prophylaxis and prevent infective endocarditis, a life-threatening condition.
Question 2
During a comprehensive oral exam, the dentist asks you to perform a periodontal screening.
You note that the patient's gingival tissue is red, swollen, and bleeds easily upon probing.
The probing depths are 2-3mm, and there is no loss of attachment. This clinical presentation
is most consistent with which condition?
A. Periodontitis
B. Gingivitis
C. Necrotizing ulcerative gingivitis
D. A periodontal abscess
,Correct Answer: B
Explanation: Gingivitis is characterized by inflammation of the gingiva without loss of
attachment, whereas periodontitis involves attachment and bone loss.
Question 3
You are taking a medical history for a new patient. The patient reports a history of rheumatic
fever as a child. Which of the following is the most significant concern for the dental team?
A. The patient may have a bleeding disorder.
B. The patient may be at risk for infective endocarditis.
C. The patient may have an allergy to local anesthetics.
D. The patient may have an increased risk of seizure.
Correct Answer: B
Explanation: A history of rheumatic fever can lead to valvular heart damage, increasing the
risk for infective endocarditis, which may require antibiotic prophylaxis.
Question 4
A patient is scheduled for a crown preparation. You are reviewing their medical history and
note they take Warfarin (Coumadin). What is the primary concern for the dental team during
this procedure?
A. Increased risk of infection.
B. Potential for prolonged bleeding.
C. Increased sensitivity to epinephrine.
D. Higher risk of allergic reaction.
Correct Answer: B
Explanation: Warfarin is an anticoagulant that inhibits blood clotting, so the primary concern
is excessive or prolonged bleeding during and after invasive procedures.
,Question 5
You are examining a patient's radiographs. You notice a small, well-defined, unilocular
radiolucency at the apex of tooth #8. The tooth is non-vital. What is the most likely diagnosis
for this finding?
A. A dentigerous cyst
B. A radicular cyst
C. An odontoma
D. A central giant cell granuloma
Correct Answer: B
Explanation: A radicular cyst (also known as a periapical cyst) is an inflammatory cyst that
forms at the apex of a non-vital tooth.
Question 6
During an extraoral examination, you palpate the patient's submandibular lymph nodes and
note they are enlarged, firm, and tender to the touch. This finding is most indicative of:
A. A normal anatomical variation.
B. A localized infection or inflammation.
C. A metastatic malignancy.
D. A systemic autoimmune disorder.
Correct Answer: B
Explanation: Tender, enlarged lymph nodes typically indicate an active inflammatory or
infectious process in the area they drain.
Question 7
A patient presents with a chief complaint of "my gums bleed when I brush." Which of the
following assessment findings would be most consistent with this complaint?
A. Probing depths of 6-7mm with clinical attachment loss.
, B. Generalized marginal erythema and edema with a BOP of 40%.
C. Localized recession on the facial of #11.
D. A 5mm probing depth with suppuration on the distolingual of #30.
Correct Answer: B
Explanation: Bleeding on probing (BOP) is a key sign of active gingival inflammation, which is
characterized by marginal erythema and edema.
Question 8
You are taking a set of bitewing radiographs. You notice a faint, thin radiolucent line on the
distal surface of tooth #3, extending from the enamel surface into the dentin. This most
likely represents:
A. A cervical burnout artifact.
B. A carious lesion.
C. A composite restoration.
D. The dental pulp.
Correct Answer: B
Explanation: Dental caries appears as a radiolucent (dark) area on a radiograph, and a lesion
extending into dentin is a clear indication of decay.
Question 9
A patient reports a history of a heart valve replacement 2 years ago. According to current
guidelines, which of the following procedures would require antibiotic prophylaxis?
A. A routine dental prophylaxis and fluoride treatment.
B. A restorative procedure with a rubber dam.
C. An extraction of a severely decayed tooth.
D. Taking a set of dental radiographs.
Dental Assistant Practice Test — Restorative Procedures, Dental
Materials, Infection Control, Clinical Techniques, Patient Safety &
Dental Regulations — 195 Multiple-Choice Questions with Answers
& Detailed Rationales
Section 1: Patient Assessment and Diagnosis (Questions 1-25)
Question 1
A patient presents for a restorative appointment. As part of the assessment, you are
responsible for obtaining a medical history. The patient reports they have a heart murmur
and take prophylactic antibiotics before dental procedures. Which of the following is the
most critical piece of information to confirm with the patient or their physician?
A. The specific type of murmur they have.
B. The exact dosage and timing of the antibiotic regimen.
C. The name of the cardiologist who prescribed the antibiotics.
D. The date of their last dental cleaning.
Correct Answer: B
Explanation: Confirming the exact antibiotic regimen is crucial to ensure effective
prophylaxis and prevent infective endocarditis, a life-threatening condition.
Question 2
During a comprehensive oral exam, the dentist asks you to perform a periodontal screening.
You note that the patient's gingival tissue is red, swollen, and bleeds easily upon probing.
The probing depths are 2-3mm, and there is no loss of attachment. This clinical presentation
is most consistent with which condition?
A. Periodontitis
B. Gingivitis
C. Necrotizing ulcerative gingivitis
D. A periodontal abscess
,Correct Answer: B
Explanation: Gingivitis is characterized by inflammation of the gingiva without loss of
attachment, whereas periodontitis involves attachment and bone loss.
Question 3
You are taking a medical history for a new patient. The patient reports a history of rheumatic
fever as a child. Which of the following is the most significant concern for the dental team?
A. The patient may have a bleeding disorder.
B. The patient may be at risk for infective endocarditis.
C. The patient may have an allergy to local anesthetics.
D. The patient may have an increased risk of seizure.
Correct Answer: B
Explanation: A history of rheumatic fever can lead to valvular heart damage, increasing the
risk for infective endocarditis, which may require antibiotic prophylaxis.
Question 4
A patient is scheduled for a crown preparation. You are reviewing their medical history and
note they take Warfarin (Coumadin). What is the primary concern for the dental team during
this procedure?
A. Increased risk of infection.
B. Potential for prolonged bleeding.
C. Increased sensitivity to epinephrine.
D. Higher risk of allergic reaction.
Correct Answer: B
Explanation: Warfarin is an anticoagulant that inhibits blood clotting, so the primary concern
is excessive or prolonged bleeding during and after invasive procedures.
,Question 5
You are examining a patient's radiographs. You notice a small, well-defined, unilocular
radiolucency at the apex of tooth #8. The tooth is non-vital. What is the most likely diagnosis
for this finding?
A. A dentigerous cyst
B. A radicular cyst
C. An odontoma
D. A central giant cell granuloma
Correct Answer: B
Explanation: A radicular cyst (also known as a periapical cyst) is an inflammatory cyst that
forms at the apex of a non-vital tooth.
Question 6
During an extraoral examination, you palpate the patient's submandibular lymph nodes and
note they are enlarged, firm, and tender to the touch. This finding is most indicative of:
A. A normal anatomical variation.
B. A localized infection or inflammation.
C. A metastatic malignancy.
D. A systemic autoimmune disorder.
Correct Answer: B
Explanation: Tender, enlarged lymph nodes typically indicate an active inflammatory or
infectious process in the area they drain.
Question 7
A patient presents with a chief complaint of "my gums bleed when I brush." Which of the
following assessment findings would be most consistent with this complaint?
A. Probing depths of 6-7mm with clinical attachment loss.
, B. Generalized marginal erythema and edema with a BOP of 40%.
C. Localized recession on the facial of #11.
D. A 5mm probing depth with suppuration on the distolingual of #30.
Correct Answer: B
Explanation: Bleeding on probing (BOP) is a key sign of active gingival inflammation, which is
characterized by marginal erythema and edema.
Question 8
You are taking a set of bitewing radiographs. You notice a faint, thin radiolucent line on the
distal surface of tooth #3, extending from the enamel surface into the dentin. This most
likely represents:
A. A cervical burnout artifact.
B. A carious lesion.
C. A composite restoration.
D. The dental pulp.
Correct Answer: B
Explanation: Dental caries appears as a radiolucent (dark) area on a radiograph, and a lesion
extending into dentin is a clear indication of decay.
Question 9
A patient reports a history of a heart valve replacement 2 years ago. According to current
guidelines, which of the following procedures would require antibiotic prophylaxis?
A. A routine dental prophylaxis and fluoride treatment.
B. A restorative procedure with a rubber dam.
C. An extraction of a severely decayed tooth.
D. Taking a set of dental radiographs.
