Illinois Dentistry Licensing Exam With
Actual Questions & Verified
Answers,Plus Rationales/Expert
Verified For Guaranteed Pass Graded
A+/2026 /Latest Update/Instant
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1. Which cranial nerve is primarily responsible for sensation in the face?
A) Facial (VII)
B) Trigeminal (V)
C) Glossopharyngeal (IX)
D) Vagus (X)
B) Trigeminal (V)
The trigeminal nerve provides sensory innervation to the face and motor
innervation to the muscles of mastication.
2. The most common site for oral squamous cell carcinoma is:
A) Buccal mucosa
B) Tongue lateral borders
C) Hard palate
D) Gingiva
B) Tongue lateral borders
Lateral borders of the tongue are most commonly affected by oral squamous
cell carcinoma due to high exposure to carcinogens.
3. In endodontics, the working length of a root canal is typically measured:
A) To the apical foramen
B) 1 mm short of the apical foramen
, C) 2 mm beyond the apex
D) At the cemento-enamel junction
B) 1 mm short of the apical foramen
Maintaining 1 mm short of the apical foramen helps prevent over-
instrumentation and periapical damage.
4. Which of the following is most effective for preventing dental caries?
A) Chlorhexidine rinse
B) Fluoride varnish
C) Xylitol gum
D) Saltwater rinse
B) Fluoride varnish
Fluoride enhances remineralization and inhibits demineralization of enamel,
making it highly effective for caries prevention.
5. The primary etiology of periodontitis is:
A) Viral infection
B) Bacterial plaque
C) Genetic mutation
D) Hormonal changes
B) Bacterial plaque
Bacterial biofilm accumulation triggers an inflammatory response that leads
to periodontal destruction.
6. Which local anesthetic has the longest duration of action?
A) Lidocaine
B) Articaine
C) Bupivacaine
D) Mepivacaine
C) Bupivacaine
Bupivacaine is long-acting and can provide anesthesia for up to 8 hours,
useful for postoperative pain control.
7. The recommended dose of epinephrine for a cardiac patient in dental
procedures is:
A) 0.04 mg
, B) 0.2 mg
C) 0.04 µg
D) 0.2 µg
A) 0.04 mg
Limiting epinephrine to 0.04 mg reduces cardiovascular risks in patients with
heart conditions.
8. A patient presents with a rapidly expanding facial swelling and trismus.
The most likely diagnosis is:
A) Periapical abscess
B) Pericoronitis
C) Ludwig’s angina
D) Osteomyelitis
C) Ludwig’s angina
Ludwig’s angina is a life-threatening cellulitis involving the submandibular
space that can compromise the airway.
9. Which radiographic technique provides the most accurate measurement
of bone height for implant placement?
A) Panoramic radiograph
B) Periapical radiograph
C) Cone-beam CT
D) Bitewing radiograph
C) Cone-beam CT
Cone-beam CT provides 3D imaging, allowing precise evaluation of bone
height and quality.
10.The most common cause of pulpal necrosis is:
A) Trauma
B) Caries
C) Periodontal disease
D) Malocclusion
B) Caries
Untreated dental caries allow bacterial invasion of the pulp, leading to
necrosis.
Actual Questions & Verified
Answers,Plus Rationales/Expert
Verified For Guaranteed Pass Graded
A+/2026 /Latest Update/Instant
Download Pdf
1. Which cranial nerve is primarily responsible for sensation in the face?
A) Facial (VII)
B) Trigeminal (V)
C) Glossopharyngeal (IX)
D) Vagus (X)
B) Trigeminal (V)
The trigeminal nerve provides sensory innervation to the face and motor
innervation to the muscles of mastication.
2. The most common site for oral squamous cell carcinoma is:
A) Buccal mucosa
B) Tongue lateral borders
C) Hard palate
D) Gingiva
B) Tongue lateral borders
Lateral borders of the tongue are most commonly affected by oral squamous
cell carcinoma due to high exposure to carcinogens.
3. In endodontics, the working length of a root canal is typically measured:
A) To the apical foramen
B) 1 mm short of the apical foramen
, C) 2 mm beyond the apex
D) At the cemento-enamel junction
B) 1 mm short of the apical foramen
Maintaining 1 mm short of the apical foramen helps prevent over-
instrumentation and periapical damage.
4. Which of the following is most effective for preventing dental caries?
A) Chlorhexidine rinse
B) Fluoride varnish
C) Xylitol gum
D) Saltwater rinse
B) Fluoride varnish
Fluoride enhances remineralization and inhibits demineralization of enamel,
making it highly effective for caries prevention.
5. The primary etiology of periodontitis is:
A) Viral infection
B) Bacterial plaque
C) Genetic mutation
D) Hormonal changes
B) Bacterial plaque
Bacterial biofilm accumulation triggers an inflammatory response that leads
to periodontal destruction.
6. Which local anesthetic has the longest duration of action?
A) Lidocaine
B) Articaine
C) Bupivacaine
D) Mepivacaine
C) Bupivacaine
Bupivacaine is long-acting and can provide anesthesia for up to 8 hours,
useful for postoperative pain control.
7. The recommended dose of epinephrine for a cardiac patient in dental
procedures is:
A) 0.04 mg
, B) 0.2 mg
C) 0.04 µg
D) 0.2 µg
A) 0.04 mg
Limiting epinephrine to 0.04 mg reduces cardiovascular risks in patients with
heart conditions.
8. A patient presents with a rapidly expanding facial swelling and trismus.
The most likely diagnosis is:
A) Periapical abscess
B) Pericoronitis
C) Ludwig’s angina
D) Osteomyelitis
C) Ludwig’s angina
Ludwig’s angina is a life-threatening cellulitis involving the submandibular
space that can compromise the airway.
9. Which radiographic technique provides the most accurate measurement
of bone height for implant placement?
A) Panoramic radiograph
B) Periapical radiograph
C) Cone-beam CT
D) Bitewing radiograph
C) Cone-beam CT
Cone-beam CT provides 3D imaging, allowing precise evaluation of bone
height and quality.
10.The most common cause of pulpal necrosis is:
A) Trauma
B) Caries
C) Periodontal disease
D) Malocclusion
B) Caries
Untreated dental caries allow bacterial invasion of the pulp, leading to
necrosis.
