RDA Study Guide 2026

Everything you need to pass the RDA exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

📋 RDA Exam Format at a Glance

150

Questions

180 min

Time Limit

75.00%

Passing Score

Take a Full RDA Exam Simulation →

📚 RDA Topics to Study (70)

Assisting with Administration of Anesthesia and Sedation · 7 cards Assisting with Administration of Anesthesia and Sedation · 7 cards Dental Charting, Tooth Morphology, and Occlusion · 7 cards Dental Charting, Tooth Morphology, and Occlusion · 7 cards Dental Instruments and Tray Setups · 7 cards Dental Instruments and Tray Setups · 7 cards Infection Control and Barrier Techniques · 7 cards Infection Control and Barrier Techniques · 7 cards Infection Control and Barrier Techniques · 7 cards Infection Control and Barrier Techniques · 7 cards Infection Control and Barrier Techniques · 7 cards Instrument Processing, Sterilization, and Monitoring · 7 cards Instrument Processing, Sterilization, and Monitoring · 7 cards Job Responsibilities and Duties · 7 cards Job Responsibilities and Duties · 7 cards Job Responsibilities and Duties · 7 cards Job Responsibilities and Duties · 7 cards Radiographic Techniques and Errors · 7 cards Radiographic Techniques and Errors · 7 cards Recognition and Management of Medical Emergencies · 7 cards Recognition and Management of Medical Emergencies · 7 cards Restorative and Impression Materials · 7 cards Restorative and Impression Materials · 7 cards Skills and Personal Attributes · 7 cards Skills and Personal Attributes · 7 cards Skills and Personal Attributes · 7 cards Skills and Personal Attributes · 7 cards State Dental Practice Act and Legal/Ethical Responsibilities · 7 cards State Dental Practice Act and Legal/Ethical Responsibilities · 7 cards Training and Credentialing Process · 7 cards

See all 70 topics as flashcards →

✍️ Sample RDA Questions & Answers

1. What radiographic error appears as a cone-shaped radiopaque shadow on the periapical image?

✓ Cone cutting

Cone cutting occurs when the PID (cone) is not aligned correctly and the primary beam misses part of the film/sensor, resulting in a clear (unexposed) area with a cone/circular shape.

2. Which action BEST demonstrates the RDA's commitment to continuing education?

✓ Attending dental conferences, completing CE credits, and staying current with evidence-based practices

Active pursuit of CE credits and evidence-based updates is a professional obligation and marks a committed RDA.

3. What is the primary purpose of a wooden wedge placed interproximally during a Class II restoration?

✓ To separate teeth and seal the gingival margin of the matrix band

Wooden wedges are placed to adapt the matrix band tightly at the gingival margin and provide slight tooth separation.

4. What should the RDA do FIRST if a patient develops syncope (fainting) during a procedure?

✓ Place patient in Trendelenburg (supine with feet elevated) position

For syncope, the first step is to place the patient in the Trendelenburg position (supine with feet elevated above the heart) to restore blood flow to the brain.

5. What is the primary role of the RDA when the dentist is administering a local anesthetic injection?

✓ Monitor the patient, retract tissue, and maintain a calm environment

The RDA supports the procedure by monitoring patient response, retracting tissue as needed, and helping maintain patient comfort and cooperation.

6. In the Universal Numbering System, which tooth is #17?

✓ Mandibular left third molar

In the Universal system, #17 is the mandibular left third molar; numbering continues from #16 (maxillary left third molar) around the arch.

🎯 Free RDA Practice Tests

Recognition and Management of Medical Emergencies · 7 questions Recognition and Management of Medical Emergencies · 7 questions Work Environment and Conditions · 7 questions Work Environment and Conditions · 7 questions Job Responsibilities and Duties · 7 questions Skills and Personal Attributes · 7 questions Skills and Personal Attributes · 7 questions Job Responsibilities and Duties · 7 questions Training and Credentialing Process · 7 questions Infection Control and Barrier Techniques · 7 questions

📖 RDA Guides & Articles

Your RDA Study Path

1. Learn with Flashcards → 2. Drill Practice Tests → 3. Take the Full Exam Simulation

🃏 RDA Flashcards (453)🏆 RDA Exam Simulation

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