Periodontics NBDE Part II Multiple Choice Question Papers

Periodontics NBDE Part II Multiple Choice Question Papers

Periodontics form a significant part of the dental education, it deals with diagnosis and treatment of various conditions/diseases which can affect the surrounding and be supporting structures of tooth mainly gingiva and periodontal ligament. Following various Periodontics NBDE Part 2 MCQ’s asked in the recent NBDE exam.

Question 1: What is the percentage of inorganic components in the dental calculus?

A. 10 – 30 %

B. 25 – 50 %

C. 45 – 70 %

D. 70 – 90 %

Answer & Explanation

Answer: [D]


Question 2: Which of the following statement is/are CORRECT regarding the crystalline form of the dental calculus

1 Subgingival calculus contains more amount of magnesium white lockite and less amount of brushite and octacalcium phosphate as compared to supragingival calculus.

2 Hydroxyapatite crystals forms the major component in both supra and Subgingival Calculus


A. Both statements are correct

B. Both statements are incorrect

C. First statement is correct while second statement is incorrect

D. First statement is incorrect while second statement is correct

Answer & Explanation

Answer: [A]


Question 3: Which of the following bacteria is considered responsible for causing black pigmentation and is also more commonly found in Down’s syndrome?

A. Bacteroides intermedius

B. Bacteroides gingivalis

C. Bacteroides melanogenicus

D. Wolinella recta

Answer & Explanation

Answer: [C]


Question 4: What is the ideal degree of angulation while performing scaling and root planing?

A. Zero degree

B. 45 – 90 degree

C. More than 120 degree

D. 100 – 110 degree

Answer & Explanation

Answer: [B]


Question 5: What is the calcium to phosphate ratio in hydroxyapatite alloplastic graft material?

A. 1

B. 1.5

C. 1.67

D. 2

Answer & Explanation

Answer: [C]

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