DENTAL HYGIENIST LICENSING EXAMINATION
(NEW YORK) ACTUAL EXAM 2026/2027 COMPLETE
ACCURATE EXAM REAL QUESTIONS WITH WELL
ELABORATED ANSWERS. (100% CORRECT VERIFIED
SOLUTIONS)
1. Which of the following is the primary role of a dental hygienist in preventive oral care?
a. Performing root canal therapy
b. Removing plaque and calculus from teeth
c. Extracting teeth
d. Placing dental crowns
Answer: b. Removing plaque and calculus from teeth
Rationale: Dental hygienists primarily focus on preventive oral care including scaling,
polishing, and patient education to remove plaque and calculus.
2. Dental plaque is best described as:
a. Hardened mineral deposits on teeth
b. A sticky biofilm of bacteria on tooth surfaces
c. A type of dental filling material
d. Dead tissue around teeth
Answer: b. A sticky biofilm of bacteria on tooth surfaces
Rationale: Plaque is a soft, sticky film composed of bacteria that forms continuously on
teeth and contributes to dental disease.
3. Which instrument is most commonly used for supragingival calculus removal?
a. Sickle scaler
b. Elevator
c. Forceps
d. Amalgam carrier
Answer: a. Sickle scaler
,Rationale: Sickle scalers are designed with pointed tips to effectively remove supragingival
calculus deposits.
4. Which condition is the earliest stage of periodontal disease?
a. Gingivitis
b. Periodontitis
c. Periapical abscess
d. Osteomyelitis
Answer: a. Gingivitis
Rationale: Gingivitis is the inflammation of the gums caused by plaque accumulation and is
reversible with proper oral hygiene.
5. Which mineral in toothpaste helps prevent dental caries?
a. Fluoride
b. Calcium
c. Iron
d. Zinc
Answer: a. Fluoride
Rationale: Fluoride strengthens enamel and helps remineralize early carious lesions.
6. Which index measures oral hygiene by evaluating plaque on teeth?
a. Plaque index
b. DMFT index
c. Gingival index
d. Periodontal index
Answer: a. Plaque index
Rationale: The plaque index measures the thickness of plaque deposits on teeth.
7. Which type of radiograph shows the crowns of upper and lower teeth simultaneously?
a. Bitewing radiograph
b. Periapical radiograph
c. Panoramic radiograph
d. Occlusal radiograph
Answer: a. Bitewing radiograph
, Rationale: Bitewing radiographs are used to detect interproximal caries and bone levels.
8. Which bacteria are primarily responsible for dental caries?
a. Streptococcus mutans
b. Staphylococcus aureus
c. Escherichia coli
d. Bacillus subtilis
Answer: a. Streptococcus mutans
Rationale: Streptococcus mutans metabolizes sugars into acids that demineralize enamel.
9. The process of removing plaque and calculus from teeth is called:
a. Scaling
b. Extraction
c. Implantation
d. Endodontics
Answer: a. Scaling
Rationale: Scaling involves removing plaque and hardened deposits from tooth surfaces.
10. Which structure surrounds and supports the teeth?
a. Periodontium
b. Enamel
c. Pulp
d. Dentin
Answer: a. Periodontium
Rationale: The periodontium includes the gingiva, periodontal ligament, cementum, and
alveolar bone supporting the teeth.
11. The instrument used to examine tooth surfaces for caries is the:
a. Explorer
b. Curette
c. Elevator
d. Forceps
Answer: a. Explorer
Rationale: Dental explorers detect irregularities and carious lesions on tooth surfaces.
(NEW YORK) ACTUAL EXAM 2026/2027 COMPLETE
ACCURATE EXAM REAL QUESTIONS WITH WELL
ELABORATED ANSWERS. (100% CORRECT VERIFIED
SOLUTIONS)
1. Which of the following is the primary role of a dental hygienist in preventive oral care?
a. Performing root canal therapy
b. Removing plaque and calculus from teeth
c. Extracting teeth
d. Placing dental crowns
Answer: b. Removing plaque and calculus from teeth
Rationale: Dental hygienists primarily focus on preventive oral care including scaling,
polishing, and patient education to remove plaque and calculus.
2. Dental plaque is best described as:
a. Hardened mineral deposits on teeth
b. A sticky biofilm of bacteria on tooth surfaces
c. A type of dental filling material
d. Dead tissue around teeth
Answer: b. A sticky biofilm of bacteria on tooth surfaces
Rationale: Plaque is a soft, sticky film composed of bacteria that forms continuously on
teeth and contributes to dental disease.
3. Which instrument is most commonly used for supragingival calculus removal?
a. Sickle scaler
b. Elevator
c. Forceps
d. Amalgam carrier
Answer: a. Sickle scaler
,Rationale: Sickle scalers are designed with pointed tips to effectively remove supragingival
calculus deposits.
4. Which condition is the earliest stage of periodontal disease?
a. Gingivitis
b. Periodontitis
c. Periapical abscess
d. Osteomyelitis
Answer: a. Gingivitis
Rationale: Gingivitis is the inflammation of the gums caused by plaque accumulation and is
reversible with proper oral hygiene.
5. Which mineral in toothpaste helps prevent dental caries?
a. Fluoride
b. Calcium
c. Iron
d. Zinc
Answer: a. Fluoride
Rationale: Fluoride strengthens enamel and helps remineralize early carious lesions.
6. Which index measures oral hygiene by evaluating plaque on teeth?
a. Plaque index
b. DMFT index
c. Gingival index
d. Periodontal index
Answer: a. Plaque index
Rationale: The plaque index measures the thickness of plaque deposits on teeth.
7. Which type of radiograph shows the crowns of upper and lower teeth simultaneously?
a. Bitewing radiograph
b. Periapical radiograph
c. Panoramic radiograph
d. Occlusal radiograph
Answer: a. Bitewing radiograph
, Rationale: Bitewing radiographs are used to detect interproximal caries and bone levels.
8. Which bacteria are primarily responsible for dental caries?
a. Streptococcus mutans
b. Staphylococcus aureus
c. Escherichia coli
d. Bacillus subtilis
Answer: a. Streptococcus mutans
Rationale: Streptococcus mutans metabolizes sugars into acids that demineralize enamel.
9. The process of removing plaque and calculus from teeth is called:
a. Scaling
b. Extraction
c. Implantation
d. Endodontics
Answer: a. Scaling
Rationale: Scaling involves removing plaque and hardened deposits from tooth surfaces.
10. Which structure surrounds and supports the teeth?
a. Periodontium
b. Enamel
c. Pulp
d. Dentin
Answer: a. Periodontium
Rationale: The periodontium includes the gingiva, periodontal ligament, cementum, and
alveolar bone supporting the teeth.
11. The instrument used to examine tooth surfaces for caries is the:
a. Explorer
b. Curette
c. Elevator
d. Forceps
Answer: a. Explorer
Rationale: Dental explorers detect irregularities and carious lesions on tooth surfaces.
