Question 74 · LDEK · Introduction

For dental caries the epidemiologic triad needs to be supplemented with fourth factor, which is:

  1. A. microorganism.
  2. B. host.
  3. C. environment.
  4. D. time.
  5. E. food.
Hint

Newbrun added a fourth circle to Keyes's three because acids must act long and often enough to cause damage.

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