OHIO Expanded Function Dental Auxiliary
(EFDA) Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026/2027 Q&A | Instant
Download Pdf
1. What is the primary role of an Expanded Function Dental Auxiliary (EFDA)?
A. Perform delegated dental procedures under supervision
B. Diagnose dental diseases independently
C. Prescribe medications
D. Operate independently of the dentist
Answer: A
Rationale: EFDAs perform specific delegated functions under dentist supervision, extending
care but not practicing independently.
2. Which of the following procedures is typically within EFDA scope?
A. Placing and carving amalgam restorations
B. Extracting teeth
C. Performing oral surgery
D. Prescribing antibiotics
Answer: A
Rationale: EFDAs are trained to place and carve restorations but cannot perform surgical or
prescription tasks.
3. Which of the following is required before an EFDA performs any delegated
procedure?
A. Obtain patient consent and dentist authorization
B. Skip consent
C. Only inform the patient verbally
D. Perform procedure without supervision
Answer: A
Rationale: Legal and ethical practice requires patient consent and dentist oversight.
4. Which of the following is correct when placing a composite restoration?
A. Follow manufacturer instructions, isolate tooth, and cure appropriately
B. Skip isolation
C. Only cure for 5 seconds regardless of instructions
D. Only place without finishing
Answer: A
Rationale: Correct placement ensures restoration longevity and patient safety.
, 5. Which of the following is required for infection control when performing EFDA
procedures?
A. Use gloves, masks, protective eyewear, and sterilized instruments
B. Only wear gloves
C. Skip masks
D. Only disinfect surfaces at the end of the day
Answer: A
Rationale: Infection control prevents cross-contamination and protects patients and staff.
6. Which of the following is correct when performing a sealant procedure?
A. Clean and isolate teeth, etch enamel, apply sealant, and cure properly
B. Skip etching
C. Only apply sealant without curing
D. Only apply on primary teeth
Answer: A
Rationale: Proper procedure ensures retention and preventive efficacy.
7. Which of the following is required when preparing a tooth for an amalgam
restoration?
A. Remove decay, shape cavity, and apply base or liner if needed
B. Skip decay removal
C. Only polish tooth
D. Skip shaping
Answer: A
Rationale: Proper preparation ensures restoration fit, function, and longevity.
8. Which of the following is correct when taking impressions for a crown?
A. Use appropriate tray, material, and technique to prevent distortion
B. Skip tray selection
C. Only mix material quickly
D. Skip isolation
Answer: A
Rationale: Accurate impressions ensure proper fit of final restorations.
9. Which of the following is required when fabricating temporary crowns?
A. Trim, polish, and adjust for occlusion and comfort
B. Skip trimming
C. Only place without adjustments
D. Skip polishing
Answer: A
Rationale: Proper temporary crowns protect the tooth and maintain function.
10. Which of the following is correct when performing fluoride application?
A. Follow dosage guidelines, apply to clean teeth, and instruct patient afterward
B. Skip cleaning
, C. Apply excessive fluoride
D. Only apply to adults
Answer: A
Rationale: Proper technique prevents toxicity and maximizes benefit.
11. Which of the following is required when placing a matrix band?
A. Adapt band properly and secure with retainer
B. Skip adaptation
C. Only place loosely
D. Only use for anterior teeth
Answer: A
Rationale: Proper band placement ensures restoration contour and contact.
12. Which of the following is correct when performing polishing of a restoration?
A. Use appropriate speed, prophylaxis paste, and avoid over-polishing
B. Skip polishing
C. Only polish quickly
D. Skip isolation
Answer: A
Rationale: Polishing enhances surface smoothness, aesthetics, and longevity.
13. Which of the following is required when using rubber dam isolation?
A. Proper placement, clamp selection, and tissue protection
B. Skip clamp
C. Only use dam without frame
D. Skip isolation of teeth
Answer: A
Rationale: Isolation ensures moisture control and patient safety.
14. Which of the following is correct when carving occlusal anatomy?
A. Follow natural tooth morphology and check occlusion
B. Skip occlusion check
C. Only carve for aesthetics
D. Skip anatomy replication
Answer: A
Rationale: Accurate carving restores function and bite alignment.
15. Which of the following is required when placing a base or liner under restorations?
A. Apply in thin layer to protect pulp and follow manufacturer instructions
B. Skip liner
C. Apply excessively
D. Only use on anterior teeth
Answer: A
Rationale: Protects pulp tissue and ensures restoration durability.
(EFDA) Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026/2027 Q&A | Instant
Download Pdf
1. What is the primary role of an Expanded Function Dental Auxiliary (EFDA)?
A. Perform delegated dental procedures under supervision
B. Diagnose dental diseases independently
C. Prescribe medications
D. Operate independently of the dentist
Answer: A
Rationale: EFDAs perform specific delegated functions under dentist supervision, extending
care but not practicing independently.
2. Which of the following procedures is typically within EFDA scope?
A. Placing and carving amalgam restorations
B. Extracting teeth
C. Performing oral surgery
D. Prescribing antibiotics
Answer: A
Rationale: EFDAs are trained to place and carve restorations but cannot perform surgical or
prescription tasks.
3. Which of the following is required before an EFDA performs any delegated
procedure?
A. Obtain patient consent and dentist authorization
B. Skip consent
C. Only inform the patient verbally
D. Perform procedure without supervision
Answer: A
Rationale: Legal and ethical practice requires patient consent and dentist oversight.
4. Which of the following is correct when placing a composite restoration?
A. Follow manufacturer instructions, isolate tooth, and cure appropriately
B. Skip isolation
C. Only cure for 5 seconds regardless of instructions
D. Only place without finishing
Answer: A
Rationale: Correct placement ensures restoration longevity and patient safety.
, 5. Which of the following is required for infection control when performing EFDA
procedures?
A. Use gloves, masks, protective eyewear, and sterilized instruments
B. Only wear gloves
C. Skip masks
D. Only disinfect surfaces at the end of the day
Answer: A
Rationale: Infection control prevents cross-contamination and protects patients and staff.
6. Which of the following is correct when performing a sealant procedure?
A. Clean and isolate teeth, etch enamel, apply sealant, and cure properly
B. Skip etching
C. Only apply sealant without curing
D. Only apply on primary teeth
Answer: A
Rationale: Proper procedure ensures retention and preventive efficacy.
7. Which of the following is required when preparing a tooth for an amalgam
restoration?
A. Remove decay, shape cavity, and apply base or liner if needed
B. Skip decay removal
C. Only polish tooth
D. Skip shaping
Answer: A
Rationale: Proper preparation ensures restoration fit, function, and longevity.
8. Which of the following is correct when taking impressions for a crown?
A. Use appropriate tray, material, and technique to prevent distortion
B. Skip tray selection
C. Only mix material quickly
D. Skip isolation
Answer: A
Rationale: Accurate impressions ensure proper fit of final restorations.
9. Which of the following is required when fabricating temporary crowns?
A. Trim, polish, and adjust for occlusion and comfort
B. Skip trimming
C. Only place without adjustments
D. Skip polishing
Answer: A
Rationale: Proper temporary crowns protect the tooth and maintain function.
10. Which of the following is correct when performing fluoride application?
A. Follow dosage guidelines, apply to clean teeth, and instruct patient afterward
B. Skip cleaning
, C. Apply excessive fluoride
D. Only apply to adults
Answer: A
Rationale: Proper technique prevents toxicity and maximizes benefit.
11. Which of the following is required when placing a matrix band?
A. Adapt band properly and secure with retainer
B. Skip adaptation
C. Only place loosely
D. Only use for anterior teeth
Answer: A
Rationale: Proper band placement ensures restoration contour and contact.
12. Which of the following is correct when performing polishing of a restoration?
A. Use appropriate speed, prophylaxis paste, and avoid over-polishing
B. Skip polishing
C. Only polish quickly
D. Skip isolation
Answer: A
Rationale: Polishing enhances surface smoothness, aesthetics, and longevity.
13. Which of the following is required when using rubber dam isolation?
A. Proper placement, clamp selection, and tissue protection
B. Skip clamp
C. Only use dam without frame
D. Skip isolation of teeth
Answer: A
Rationale: Isolation ensures moisture control and patient safety.
14. Which of the following is correct when carving occlusal anatomy?
A. Follow natural tooth morphology and check occlusion
B. Skip occlusion check
C. Only carve for aesthetics
D. Skip anatomy replication
Answer: A
Rationale: Accurate carving restores function and bite alignment.
15. Which of the following is required when placing a base or liner under restorations?
A. Apply in thin layer to protect pulp and follow manufacturer instructions
B. Skip liner
C. Apply excessively
D. Only use on anterior teeth
Answer: A
Rationale: Protects pulp tissue and ensures restoration durability.
