NDEAB PRACTICE EXAM DA COMPLETE
STUDY GUIDE 2026 | DENTAL ASSISTANT
MOCK QUESTIONS, RATIONALES & CHEAT
SHEET
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales Included
,A patient presents to the dental office with concerns Exposed dentinal tubules
about sensitivity on a lower canine tooth. The dentist
performs an examination and diagnoses gingival
recession and abrasion on the facial root surface of tooth
33. The patient has 100% dental insurance
coverage for diagnostic, preventive and restorative
services.
What is the etiology of the sensitivity?
A 24-year-old patient presents for an emergency exam. Debridement, careful brushing at home, warm water rinses
During the interview it is noted that he is a heavy smoker
and has been under a
great deal of emotional stress. The clinical examination
findings are: a biofilm index of 3 with some ulceration of
interdental papillae.
What
is the recommended treatment for this patient?
A 75-year-old patient presents at the dental office with a Rolling stroke.
fractured tooth 46. While reviewing the medical history,
the dental assistant notes that the patient has rheumatoid
arthritis and type II diabetes. The clinical examination also
reveals generalized gingival recession, cervical tooth
abrasion and several root caries.
Which one of the following tooth brushing techniques
should be recommended for this
patient?
A patient presents for a bridge preparation. The dentist As a matrix for the provisional
administers the local anesthetic then the dental assistant
takes an alginate impression of the lower left quadrant.
Teeth 36 and 37 are missing and tooth 38 has drifted into
the 37 position. The bridge will go from tooth 35 to tooth
38.
The insurance plan provides 80% reimbursement for this
type of treatment.
What will the alginate impression be used for?
A patient presents for an emergency examination of 26
tooth 16. The tooth has been sensitive to pressure for
several weeks and the patient indicates that it is getting
worse. The dentist does an intra-oral examination and
prescribes a direct digital periapical radiograph of the
area. The dental assistant is directed to assemble
equipment and supplies for pulp vitality testing.
Which one of the following teeth would be best as the
control tooth for the pulp
vitality test?
, A patient presents for an emergency examination of Irreversible pulpitis.
tooth 16. The tooth has been sensitive to pressure for
several weeks and the patient indicates that it is getting
worse. The dentist does an intra-oral examination and
prescribes a direct digital periapical radiograph of the
area. The dental assistant is directed to assemble
equipment and supplies for pulp vitality testing.
The cold test for the tooth causes an intense pain that
does not resolve for a few minutes. What diagnosis is
most probable?
A dental assistant must be able to self-correct errors Arch is punched too flat.
made during dental dam punching and placement. From
the list of errors below, choose the one that best matches
the scenario given in the item.
Bunching and stretching on lingual of dam when placed
A mother of a 5-month-old infant ask the dental assistant 2. Her bottom two teeth, the central incisors
which of her daughter's teeth will fall out first. What is the
most accurate response?
1. Her upper two teeth, the frontal incisors
2. Her bottom two teeth, the central incisors
3. Her two canine teeth will fall out first
4. Her primary molars
Which of the following produces about 60% of the total 3. Submandibular glands
amount of saliva?
1. Sublingual gland
2. Parotid gland
3. Submandibular glands
4. None of the options
Which of the following muscles of the mouth floor raises 2. Stylohyoid
the hyoid bone to assist in swallowing?
1. Digastric
2. Stylohyoid
3. Geniohyoid
4. Mylohyoid
STUDY GUIDE 2026 | DENTAL ASSISTANT
MOCK QUESTIONS, RATIONALES & CHEAT
SHEET
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales Included
,A patient presents to the dental office with concerns Exposed dentinal tubules
about sensitivity on a lower canine tooth. The dentist
performs an examination and diagnoses gingival
recession and abrasion on the facial root surface of tooth
33. The patient has 100% dental insurance
coverage for diagnostic, preventive and restorative
services.
What is the etiology of the sensitivity?
A 24-year-old patient presents for an emergency exam. Debridement, careful brushing at home, warm water rinses
During the interview it is noted that he is a heavy smoker
and has been under a
great deal of emotional stress. The clinical examination
findings are: a biofilm index of 3 with some ulceration of
interdental papillae.
What
is the recommended treatment for this patient?
A 75-year-old patient presents at the dental office with a Rolling stroke.
fractured tooth 46. While reviewing the medical history,
the dental assistant notes that the patient has rheumatoid
arthritis and type II diabetes. The clinical examination also
reveals generalized gingival recession, cervical tooth
abrasion and several root caries.
Which one of the following tooth brushing techniques
should be recommended for this
patient?
A patient presents for a bridge preparation. The dentist As a matrix for the provisional
administers the local anesthetic then the dental assistant
takes an alginate impression of the lower left quadrant.
Teeth 36 and 37 are missing and tooth 38 has drifted into
the 37 position. The bridge will go from tooth 35 to tooth
38.
The insurance plan provides 80% reimbursement for this
type of treatment.
What will the alginate impression be used for?
A patient presents for an emergency examination of 26
tooth 16. The tooth has been sensitive to pressure for
several weeks and the patient indicates that it is getting
worse. The dentist does an intra-oral examination and
prescribes a direct digital periapical radiograph of the
area. The dental assistant is directed to assemble
equipment and supplies for pulp vitality testing.
Which one of the following teeth would be best as the
control tooth for the pulp
vitality test?
, A patient presents for an emergency examination of Irreversible pulpitis.
tooth 16. The tooth has been sensitive to pressure for
several weeks and the patient indicates that it is getting
worse. The dentist does an intra-oral examination and
prescribes a direct digital periapical radiograph of the
area. The dental assistant is directed to assemble
equipment and supplies for pulp vitality testing.
The cold test for the tooth causes an intense pain that
does not resolve for a few minutes. What diagnosis is
most probable?
A dental assistant must be able to self-correct errors Arch is punched too flat.
made during dental dam punching and placement. From
the list of errors below, choose the one that best matches
the scenario given in the item.
Bunching and stretching on lingual of dam when placed
A mother of a 5-month-old infant ask the dental assistant 2. Her bottom two teeth, the central incisors
which of her daughter's teeth will fall out first. What is the
most accurate response?
1. Her upper two teeth, the frontal incisors
2. Her bottom two teeth, the central incisors
3. Her two canine teeth will fall out first
4. Her primary molars
Which of the following produces about 60% of the total 3. Submandibular glands
amount of saliva?
1. Sublingual gland
2. Parotid gland
3. Submandibular glands
4. None of the options
Which of the following muscles of the mouth floor raises 2. Stylohyoid
the hyoid bone to assist in swallowing?
1. Digastric
2. Stylohyoid
3. Geniohyoid
4. Mylohyoid
