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The most important diagnostic test to differentiate between an acute periapical abscess and a phoenix abscess is: PGCEE MDS 2022

 # The most important diagnostic test to differentiate between an acute periapical abscess and a phoenix abscess is: 
a) Pulp testing
b) Radiographs
c) History
d) Percussion




The correct answer is B. Radiographs.

Phoenix abscess is an acute inflammatory reaction superimposed on an existing chronic lesion, such as a cyst or granuloma. The exacerbation of a chronic lesion is most commonly associated with the initiation of root canal therapy in a completely asymptomatic tooth. In such a tooth, radiographs show well-defined periradicular lesions.


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