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Question 1

What is panoramic radiography used for and disadvantage?

Answer 1

•see large and remote abnormalities
•assess presence/absence of developing teeth for orthodontic treatment
•dis= very sensitive to positioning, leads to incorrect horizontal magnification

Question 2

What are signs of developing dentition using radiography?

Answer 2

•calcification appears at tips of cups or Invisalign edges
•’open apex’ of developing tooth root
•initial sign of a tooth is radiolucent crypt