Endodontics · single question
In an endodontically treated tooth with a persistent periapical lesion, which bacterium is LEAST likely to be found?
Show answer and explanation
Correct answer: D. P. gingivalis
- A. Fusobacterium is commonly found in persistent endodontic infections.
- B. Prevotella is commonly found in persistent endodontic infections.
- C. Actinomyces is a classic organism associated with persistent/refractory periapical infections (actinomycosis).
- D. Correct (least likely). P. gingivalis is mainly associated with periodontal disease rather than persistent endodontic (periapical) infections.
Note: P. gingivalis is mainly associated with periodontal disease, not persistent endodontic infections.