What does the term “physiological mesial drift”mean?
  1. The tendency of posterior permanent teeth to move anteriorly
  2. The tendency of posterior permanent teeth to move posteriorly
  3. The tendency of anterior deciduous teeth to move mesially
  4. The tendency of posterior deciduous teeth to move mesially
Explanation
Answer: A - The term “physiological mesial drift” refers to the tendency of posterior permanent teeth to move anteriorly.
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