Question 218 · LDEK · Periapical diseases
Which of the following concerning diagnostic procedure in the case of a fistula in the oral cavity is true?
- A. fistula should be always pressed to evacuate the pus.
- B. it is necessary to take the X-ray with a paper point to drain off the pus, which could blur the contrast of tissues.
- C. if the diagnosis is uncertain the X-ray should be taken with a gutta-percha point inserted in the fistula canal.
- D. in every case the X-ray should be taken with an endodontic file inserted in the root canal and the fistula.
- E. to ensure the drainage the procedure of fenestration is performed to secure a permanent outflow of the pus.
Hint
The opening of a sinus tract may lie away from the causative tooth — think about how to trace its source radiographically.
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