Where It Lives
Root canal systems, deep dentin layers of teeth, areas of previously treated teeth, occasionally in periodontal pockets
What It Does in the Mouth
Enterococcus faecalis is often found in persistent root canal infections. It is highly resistant and can survive harsh conditions inside treated teeth, making it a common cause of failed root canal therapy and chronic dental infections.
Why It Matters for Whole-Body Health
Chronic dental infections involving E. faecalis can contribute to ongoing inflammation in the body. In rare cases, this bacterium has been associated with bloodstream infections and endocarditis in medically vulnerable individuals.
Associated Oral Conditions
Persistent root canal infections
Failed endodontic treatment
Chronic dental abscess
Jawbone infections
Endocarditis (rare, high-risk individuals)
How It Spreads
- Can remain inside previously infected teeth
- May survive dental procedures if infection is not fully eliminated
- Opportunistically colonizes weakened oral sites
Risk Factors That Increase It
- Untreated tooth decay
- Failed or incomplete root canal treatment
- Cracked or fractured teeth
- Compromised immune function
- Poor oral hygiene
Life Stage Relevance