# RDA exam practice questions: Patient education Five original RDA exam practice questions on patient education, each answered on this page with a rationale and a source. Last updated: 2026-07-25. ## Question 1 A discouraged patient with limited hand dexterity has heavy plaque despite "brushing hard twice a day." What educational approach is best? - A. Tell her to brush harder and for longer at each brushing session. - B. Give her a pamphlet on periodontal disease to take home and read. - C. Disclose the plaque, demonstrate in her own mouth, and substitute tools she can handle. - D. Tell her that home care will not help and that more frequent office visits are the only answer. **Answer C:** Disclose the plaque, demonstrate in her own mouth, and substitute tools she can handle. The credited pattern stacks the education methods: disclose the plaque so the patient can see it, demonstrate in the patient's own mouth, substitute tools that match her dexterity, set one achievable goal, and schedule reinforcement. **Common trap:** "brush harder" is doubly wrong — aggressive scrubbing damages tissue without removing more plaque — and a pamphlet alone is a single-shot answer. Source: Bird DL, Robinson DS. Modern Dental Assisting. Current edition, Elsevier — the standard clinical dental-assisting reference used for Areas 1–3… ## Question 2 A 26-year-old patient at a Sacramento general practice tells the RDA that her gums bleed nearly every time she brushes, and she has started skipping those areas. The dentist's examination notes red, puffy gingival margins with heavy plaque, no recession, no bone loss, and no tooth mobility. What is the most accurate education for this patient? - A. Bleeding gums are a sign that supporting bone has already been lost, so the damage cannot be reversed. - B. This early gum inflammation is reversible with thorough daily plaque removal and professional care. - C. She should stop brushing the bleeding areas until they heal on their own, and rinse with mouthwash instead. - D. She should brush harder and faster over the inflamed areas, since firmer scrubbing removes more plaque. **Answer B:** This early gum inflammation is reversible with thorough daily plaque removal and professional care. Red, swollen, easily bleeding gingival margins with no attachment or bone loss describe gingivitis, the stage that is reversible with daily plaque removal and professional care; periodontitis — attachment and bone loss, deep pockets, mobile teeth — is the permanent stage that treatment can arrest but not undo. The assistant describes the signs and teaches plaque control, while naming the patient's condition remains the dentist's diagnostic call. **Common trap:** The reversibility swap: distractors quietly move gingivitis into the permanent column (A). Avoiding the bleeding areas (C) removes the very plaque control that resolves the inflammation, and "brush harder" (D) is doubly wrong — aggressive scrubbing damages gingiva without removing more plaque. Source: [California Business & Professions Code §1750.1 — basic supportive dental procedures delegable to unlicensed dental assistants (general- versus…](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1750.1.&lawCode=BPC) ## Question 3 A patient with rheumatoid arthritis and limited hand dexterity returns to a San Jose office discouraged: her gums still bleed even though she says she brushes twice a day. The dentist asks the RDA to provide oral hygiene education. Which approach best matches exam-standard method? - A. Hand her a home-care pamphlet, remind her to brush three times a day, and ask her to return if the bleeding has not stopped. - B. Tell her to brush harder over the bleeding areas with a firmer-bristled brush until the tissue stops bleeding. - C. Disclose the plaque, demonstrate the Bass technique in her own mouth, switch her to a powered brush and floss holder, and set one goal. - D. Suggest she replace brushing with a prescription-strength antimicrobial rinse twice daily until her hand dexterity improves with treatment. **Answer C:** Disclose the plaque, demonstrate the Bass technique in her own mouth, switch her to a powered brush and floss holder, and set one goal. Exam-standard hygiene education is demonstration-based and individualized: disclosing agents make invisible plaque visible, tell-show-do puts the technique in the patient's own mouth and the assistant watches her repeat it back, and the Bass (sulcular) technique — soft brush at about 45 degrees to the long axis of the tooth, bristle tips into the gingival sulcus, short vibratory strokes — targets the gumline where gingivitis starts. Tools are matched to the patient's ability, one achievable goal is set rather than several, and instruction is reinforced at scheduled follow-up because habit change is gradual. The education is delivered as team communication under the dentist's supervision and consistent with the dentist's plan for that patient. **Common trap:** Single-shot answers (A) lose to the demonstrate-tailor-reinforce pattern, and "brush harder" (B) is never credited. Option D has the assistant recommending a prescription product, which is a prescribing decision excluded from every assisting category. Stale-prep trap: older materials that tell you to rehearse this demonstration "for the practical exam" describe an examination that no longer exists — the RDA practical was suspended in 2017 and later eliminated, leaving only the combined written exam. Source: [Dental Board of California — Registered Dental Assistant Combined Written and Law and Ethics Examination Outline (2023), including the Area 2…](https://www.dbc.ca.gov/formspubs/rda_exam_outline.pdf) ## Question 4 Two days after a crown preparation at a Fresno practice, a patient calls and says her temporary crown "feels high" when she bites down. The dentist is treating another patient. What should the RDA do? - A. Reassure her that a temporary always feels a little high at first and that the sensation resolves when the permanent crown is seated. - B. Report the finding to the dentist to evaluate and direct, and meanwhile relay the existing provisional-care instructions. - C. Tell her the temporary has simply worked loose and that she should press it firmly back into place herself before her next visit. - D. Tell her to take 600 mg of ibuprofen every six hours for the discomfort until her permanent crown appointment next week. **Answer B:** Report the finding to the dentist to evaluate and direct, and meanwhile relay the existing provisional-care instructions. A provisional that feels high in the bite is a report-to-the-dentist finding, not a normal healing symptom that fades on its own, and the same is true of a provisional that comes off. Relaying the dentist's existing provisional-care instructions — avoid sticky and hard foods, chew on the other side — is education the assistant may deliver. Be precise about where the ceiling actually sits: adjusting an indirect provisional is within RDA scope — BPC §1752.4(a)(10) authorizes an RDA to "fabricate, adjust, cement, and remove indirect provisional restorations," on the general-supervision list and marked G on the Board's table. What the RDA may not do is evaluate the provisional and decide on her own that it needs adjusting, or tell the patient what her symptom means: diagnosis and treatment planning are excluded from every assisting category under BPC §1750.1(d). So the correct sequence is report → dentist evaluates and directs → the RDA may then perform the adjustment the dentist ordered. Supervision level does not move that line in either direction; it only decides whether the dentist must be physically present while the ordered work is done. **Common trap:** "Wait it out" (A) is the reassurance-of-a-red-flag error, and the do-it-yourself fix (C) has the patient acting on advice the assistant invented. Option D is the helpful-assistant drug trap: naming a drug and a dose is prescribing, which is excluded from every dental assisting category. Source: [California Business & Professions Code §1752.4 — RDA duties and supervision levels. Subdivision (a) lists the RDA's duties, performed "under general…](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1752.4.&lawCode=BPC) ## Question 5 Three days after a lower molar extraction, a patient telephones an Anaheim office. She reports severe throbbing pain that is now worse than it was on the first day, along with a foul taste and odor. The RDA takes the call. What is the most appropriate action? - A. Reassure her that soreness typically peaks around day three, advise vigorous warm salt-water rinses, and ask her to call back next week if it persists. - B. Tell her this is a dry socket and schedule her to have a medicated dressing placed. - C. Recognize the report as a red flag and arrange for the dentist to evaluate her promptly. - D. Advise her to double her over-the-counter pain reliever and to rinse forcefully to flush the socket clean. **Answer C:** Recognize the report as a red flag and arrange for the dentist to evaluate her promptly. Normal post-extraction symptoms are worst early and improve day by day; severe or worsening pain two to four days after an extraction, often with a foul taste or odor, is the classic dry-socket picture and a red flag. The assistant's job on every red flag is the same — recognize it and route the patient to the dentist for evaluation, not reassure and not treat. **Common trap:** Option B is tempting precisely because the presentation is textbook, but stating what the patient has is diagnosis and belongs to the dentist. Option A dismisses a red flag as normal healing, and option D both doses a medication and instructs the vigorous rinsing that dislodges the clot. Source: [California Business & Professions Code §1750.1 — basic supportive dental procedures delegable to unlicensed dental assistants (general- versus…](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=1750.1.&lawCode=BPC) ## Next step [Take the free 15-question practice test](https://dentovio.com/rda/free-practice-test) Official reference: [Dental Board of California RDA Combined Written and Law and Ethics Examination Outline](https://www.dbc.ca.gov/formspubs/rda_exam_outline.pdf). Original exam-style questions written for study, never recalled exam content. Independent educational preparation, not legal or clinical advice, and not affiliated with or endorsed by the Dental Board of California or PSI. Confirm current requirements with the Dental Board of California.