PERIODONTOLOGY EXAM 2 | DENTAL
HYGIENIST | LATEST 2025-2026 QUESTION AND
CORRECT ANSWER WITH EXPLANATION
WEST COAST UNIVERSITY
1. A patient presents with interdental CAL of 3–4 mm, radiographic bone
loss up to the coronal third, and no tooth loss. What is the MOST
appropriate stage?
A. Stage I
B. Stage II
C. Stage III
D. Stage IV
Correct Answer: B
Rationale: CAL 3–4 mm with coronal third bone loss = Stage II.
2. A patient with Stage II periodontitis is a smoker (>10 cigarettes/day).
What is the MOST appropriate grade?
A. Grade A
B. Grade B
C. Grade C
D. Cannot be determined
Correct Answer: C
Rationale: Heavy smoking automatically increases grade to C.
3. A patient has 6 mm pockets, vertical bone loss, and furcation
involvement. What is the MOST likely stage?
A. Stage I
B. Stage II
C. Stage III
D. Stage IV
Correct Answer: C
Rationale: Deep pockets with complexity factors indicate Stage III.
,4. Which factor MOST directly influences periodontal grading?
A. Tooth color
B. Rate of disease progression
C. Pocket depth only
D. Gingival color
Correct Answer: B
Rationale: Grading reflects progression risk and speed.
5. A diabetic patient with HbA1c of 9% presents with moderate
periodontitis. What is the MOST appropriate grade?
A. Grade A
B. Grade B
C. Grade C
D. Grade cannot be assigned
Correct Answer: C
Rationale: Poor glycemic control elevates grading to C.
6. Which radiographic finding is MOST indicative of active periodontitis?
A. Uniform bone height
B. Vertical bone defects
C. Enamel thickness
D. Calculus only
Correct Answer: B
Rationale: Vertical defects suggest active disease progression.
7. A patient presents with generalized 5 mm pockets and bone loss to the
middle third. What is the MOST appropriate stage?
A. Stage I
B. Stage II
, C. Stage III
D. Stage IV
Correct Answer: C
Rationale: Bone loss to middle third indicates Stage III.
8. What is the PRIMARY difference between Stage III and Stage IV
periodontitis?
A. Presence of gingivitis
B. Functional impairment and tooth loss
C. Plaque levels
D. Bleeding
Correct Answer: B
Rationale: Stage IV includes functional problems and tooth loss.
9. Which condition is MOST associated with rapid periodontal
destruction?
A. Chronic gingivitis
B. Aggressive periodontitis
C. Fluorosis
D. Calculus
Correct Answer: B
Rationale: Aggressive forms show rapid progression.
10. A patient presents with minimal plaque but severe bone loss. What
does this MOST suggest?
A. Poor hygiene
B. Host susceptibility or systemic factor
C. Fluoride toxicity
D. Saliva deficiency
Correct Answer: B
Rationale: Disproportionate destruction suggests systemic or genetic
influence.
HYGIENIST | LATEST 2025-2026 QUESTION AND
CORRECT ANSWER WITH EXPLANATION
WEST COAST UNIVERSITY
1. A patient presents with interdental CAL of 3–4 mm, radiographic bone
loss up to the coronal third, and no tooth loss. What is the MOST
appropriate stage?
A. Stage I
B. Stage II
C. Stage III
D. Stage IV
Correct Answer: B
Rationale: CAL 3–4 mm with coronal third bone loss = Stage II.
2. A patient with Stage II periodontitis is a smoker (>10 cigarettes/day).
What is the MOST appropriate grade?
A. Grade A
B. Grade B
C. Grade C
D. Cannot be determined
Correct Answer: C
Rationale: Heavy smoking automatically increases grade to C.
3. A patient has 6 mm pockets, vertical bone loss, and furcation
involvement. What is the MOST likely stage?
A. Stage I
B. Stage II
C. Stage III
D. Stage IV
Correct Answer: C
Rationale: Deep pockets with complexity factors indicate Stage III.
,4. Which factor MOST directly influences periodontal grading?
A. Tooth color
B. Rate of disease progression
C. Pocket depth only
D. Gingival color
Correct Answer: B
Rationale: Grading reflects progression risk and speed.
5. A diabetic patient with HbA1c of 9% presents with moderate
periodontitis. What is the MOST appropriate grade?
A. Grade A
B. Grade B
C. Grade C
D. Grade cannot be assigned
Correct Answer: C
Rationale: Poor glycemic control elevates grading to C.
6. Which radiographic finding is MOST indicative of active periodontitis?
A. Uniform bone height
B. Vertical bone defects
C. Enamel thickness
D. Calculus only
Correct Answer: B
Rationale: Vertical defects suggest active disease progression.
7. A patient presents with generalized 5 mm pockets and bone loss to the
middle third. What is the MOST appropriate stage?
A. Stage I
B. Stage II
, C. Stage III
D. Stage IV
Correct Answer: C
Rationale: Bone loss to middle third indicates Stage III.
8. What is the PRIMARY difference between Stage III and Stage IV
periodontitis?
A. Presence of gingivitis
B. Functional impairment and tooth loss
C. Plaque levels
D. Bleeding
Correct Answer: B
Rationale: Stage IV includes functional problems and tooth loss.
9. Which condition is MOST associated with rapid periodontal
destruction?
A. Chronic gingivitis
B. Aggressive periodontitis
C. Fluorosis
D. Calculus
Correct Answer: B
Rationale: Aggressive forms show rapid progression.
10. A patient presents with minimal plaque but severe bone loss. What
does this MOST suggest?
A. Poor hygiene
B. Host susceptibility or systemic factor
C. Fluoride toxicity
D. Saliva deficiency
Correct Answer: B
Rationale: Disproportionate destruction suggests systemic or genetic
influence.
