DANB CDA Certification Exam 2026: Comprehensive Certified Dental
Assistant Practice Test — Infection Control, Chairside Assisting,
Dental Radiography, Patient Care & Safety, Dental Materials &
Office Management — 190 Multiple-Choice Questions with Answers
& Detailed Rationales
SECTION 1: GENERAL CHAIRSIDE ASSISTING (Questions 1–95)
Domain 1: Collection and Recording of Clinical Data
Question 1
A patient presents for a comprehensive examination and reports a history of rheumatic fever
as a child. Which clinical consideration is MOST important for the dental team to address
before treatment?
A. The patient may require antibiotic premedication based on current AHA guidelines.
B. The patient should receive only local anesthesia without vasoconstrictor.
C. Treatment should be deferred until cardiac clearance is obtained.
D. The patient's blood pressure must be monitored continuously during treatment.
Correct Answer: A
Explanation: Current AHA guidelines determine premedication eligibility; rheumatic fever
history alone may warrant prophylaxis depending on cardiac damage status. Clinical pearl:
verify cardiac history specifics, not just the diagnosis.
Question 2
During patient assessment, the dental assistant records a blood pressure reading of 148/92
mmHg. This reading is classified as:
,A. Normal
B. Elevated
C. Stage 1 hypertension
D. Stage 2 hypertension
Correct Answer: C
Explanation: According to ACC/AHA guidelines, systolic 130–139 or diastolic 80–89 is Stage 1;
140+ or 90+ is Stage 2. This reading requires documentation and dentist notification.
Question 3
When documenting a patient's chief complaint, which approach provides the MOST clinically
useful information?
A. Recording the patient's exact words in quotation marks.
B. Summarizing the complaint in clinical terminology.
C. Omitting emotional descriptors to maintain objectivity.
D. Recording only the duration and location of symptoms.
Correct Answer: A
Explanation: Quoting the patient verbatim preserves subjective experience and emotional
context, which aids diagnosis and rapport. Clinical pearl: "I feel like my tooth is throbbing"
conveys more than "patient reports pain."
Question 4
,A dental assistant is updating a patient's medical history and notes the patient now takes
metformin. The patient most likely has which condition?
A. Hypertension
B. Type 2 diabetes mellitus
C. Hyperthyroidism
D. Osteoporosis
Correct Answer: B
Explanation: Metformin is a first-line oral antidiabetic medication. Clinical pearl: diabetic
patients may require morning appointments and glucose monitoring before invasive
procedures.
Question 5
Which component of a patient's medical history would MOST likely require modification of
dental treatment?
A. Seasonal allergies
B. History of mitral valve prolapse
C. Corrected vision with contacts
D. Childhood asthma resolved
Correct Answer: B
Explanation: Mitral valve prolapse may require antibiotic prophylaxis per current guidelines
if certain conditions coexist. Clinical pearl: verify with the patient's cardiologist when cardiac
history is reported.
, Question 6
The dental assistant notes a patient has a "latex allergy" documented. Which item in the
operatory presents the GREATEST immediate risk?
A. Cotton rolls
B. Prophy paste
C. Exam gloves
D. Fluoride varnish
Correct Answer: C
Explanation: Latex gloves are a primary exposure source; non-latex alternatives must be
used. Clinical pearl: check all items containing natural rubber latex, including blood pressure
cuffs and bite blocks.
Question 7
When taking a patient's pulse, the dental assistant should record the rate and also note:
A. The patient's respiratory rate simultaneously.
B. The rhythm and strength of the pulse.
C. The time of day the reading was taken.
D. The patient's last meal time.
Correct Answer: B
Assistant Practice Test — Infection Control, Chairside Assisting,
Dental Radiography, Patient Care & Safety, Dental Materials &
Office Management — 190 Multiple-Choice Questions with Answers
& Detailed Rationales
SECTION 1: GENERAL CHAIRSIDE ASSISTING (Questions 1–95)
Domain 1: Collection and Recording of Clinical Data
Question 1
A patient presents for a comprehensive examination and reports a history of rheumatic fever
as a child. Which clinical consideration is MOST important for the dental team to address
before treatment?
A. The patient may require antibiotic premedication based on current AHA guidelines.
B. The patient should receive only local anesthesia without vasoconstrictor.
C. Treatment should be deferred until cardiac clearance is obtained.
D. The patient's blood pressure must be monitored continuously during treatment.
Correct Answer: A
Explanation: Current AHA guidelines determine premedication eligibility; rheumatic fever
history alone may warrant prophylaxis depending on cardiac damage status. Clinical pearl:
verify cardiac history specifics, not just the diagnosis.
Question 2
During patient assessment, the dental assistant records a blood pressure reading of 148/92
mmHg. This reading is classified as:
,A. Normal
B. Elevated
C. Stage 1 hypertension
D. Stage 2 hypertension
Correct Answer: C
Explanation: According to ACC/AHA guidelines, systolic 130–139 or diastolic 80–89 is Stage 1;
140+ or 90+ is Stage 2. This reading requires documentation and dentist notification.
Question 3
When documenting a patient's chief complaint, which approach provides the MOST clinically
useful information?
A. Recording the patient's exact words in quotation marks.
B. Summarizing the complaint in clinical terminology.
C. Omitting emotional descriptors to maintain objectivity.
D. Recording only the duration and location of symptoms.
Correct Answer: A
Explanation: Quoting the patient verbatim preserves subjective experience and emotional
context, which aids diagnosis and rapport. Clinical pearl: "I feel like my tooth is throbbing"
conveys more than "patient reports pain."
Question 4
,A dental assistant is updating a patient's medical history and notes the patient now takes
metformin. The patient most likely has which condition?
A. Hypertension
B. Type 2 diabetes mellitus
C. Hyperthyroidism
D. Osteoporosis
Correct Answer: B
Explanation: Metformin is a first-line oral antidiabetic medication. Clinical pearl: diabetic
patients may require morning appointments and glucose monitoring before invasive
procedures.
Question 5
Which component of a patient's medical history would MOST likely require modification of
dental treatment?
A. Seasonal allergies
B. History of mitral valve prolapse
C. Corrected vision with contacts
D. Childhood asthma resolved
Correct Answer: B
Explanation: Mitral valve prolapse may require antibiotic prophylaxis per current guidelines
if certain conditions coexist. Clinical pearl: verify with the patient's cardiologist when cardiac
history is reported.
, Question 6
The dental assistant notes a patient has a "latex allergy" documented. Which item in the
operatory presents the GREATEST immediate risk?
A. Cotton rolls
B. Prophy paste
C. Exam gloves
D. Fluoride varnish
Correct Answer: C
Explanation: Latex gloves are a primary exposure source; non-latex alternatives must be
used. Clinical pearl: check all items containing natural rubber latex, including blood pressure
cuffs and bite blocks.
Question 7
When taking a patient's pulse, the dental assistant should record the rate and also note:
A. The patient's respiratory rate simultaneously.
B. The rhythm and strength of the pulse.
C. The time of day the reading was taken.
D. The patient's last meal time.
Correct Answer: B
