NDEB Dental Public Health and Preventive Dentistry

Question 1

What is the optimal fluoride concentration in community water fluoridation recommended by the US Public Health Service?

Accepted Answer

0.7 mg/L

Answer

The US Public Health Service recommends 0.7 mg/L as the optimal fluoride concentration for community water fluoridation to prevent caries while minimizing fluorosis.

Question 2

Which index measures the prevalence and severity of dental fluorosis in a population?

Accepted Answer

Dean's Fluorosis Index

Answer

Dean's Fluorosis Index scores fluorosis severity from 0 (normal) to 4 (severe) and is used to determine community fluorosis prevalence.

Question 3

Which type of prevention focuses on restoring teeth already damaged by disease?

Accepted Answer

Tertiary prevention

Answer

Tertiary prevention aims to restore function and reduce complications from existing disease, such as placing restorations or prosthetics.

Question 4

What does the DMFT index measure?

Accepted Answer

Decayed, Missing, and Filled permanent Teeth

Answer

DMFT records the number of permanent teeth that are Decayed, Missing due to caries, or Filled to quantify caries experience in a population.

Question 5

Which bacteria is most associated with the initiation of dental caries?

Accepted Answer

Streptococcus mutans

Answer

Streptococcus mutans is the primary cariogenic bacterium, producing lactic acid and colonizing smooth tooth surfaces to initiate decay.

NDEB - National Dental Examining Board Practice Test

NDEB - National Dental Examining Board Practice Test

NDEB Dental Public Health and Preventive Dentistry