Disease Description (Causes and Symptoms)
- Definition: A condition in which an abscess (suppurative inflammation) develops around the tip of the tooth root (apex), and in some cases a fistula (odontogenic fistula, sinus) forms in the gums.
- Causes and pathophysiology: Most cases occur when dental caries progress, infecting and necrosing the dental pulp (nerve), allowing bacteria and inflammation to spread to the root tip. It may also develop due to root fracture or treatment failure after previous root canal treatment; when it becomes chronic, a draining fistula or cyst (sac) may form.
- Main symptoms: Severe pain (especially during chewing), swelling/tenderness around the root tip, a sensation that the tooth is raised or loose (discomfort when chewing), temperature sensitivity (pain from cold or hot substances), fever and headache (systemic symptoms); in chronic cases, there may be little pain, but a draining fistula may be observed in the gums.
- Tests useful for diagnosis: Oral (clinical) examination, periapical radiograph, CBCT if necessary, pulp sensibility tests (electrical and cold), and, when a fistula is present, tracing with gutta-percha to identify the site of origin.
Treatment Methods
- Primary treatment (attempt to preserve the tooth): Root canal treatment (removal of infection inside the root canal → disinfection → filling with medication). If root canal treatment is successful, the abscess improves.
- Surgical treatment: If the lesion persists even after root canal treatment, the lesion is removed through apicoectomy (root-end resection).
- Extraction: Extraction if the tooth is severely destroyed and cannot be preserved.
- If the abscess is localized and has severe tenderness and swelling, incision and drainage are performed.
- Antibiotics: For localized and limited infections, root canal treatment takes priority, and antibiotics are prescribed as an adjunct. Antibiotic administration is recommended in patients with systemic symptoms (high fever, lymphadenitis), spread into soft tissue (facial swelling, cellulitis), or immunosuppression.
- Pain control and conservative treatment: Analgesics such as NSAIDs (e.g., ibuprofen), and temporary dietary adjustment (avoid chewing with the treated area).
- Follow-up observation: Follow-up is necessary until radiographic findings and clinical symptoms improve. If there is a chronic cyst or bone destruction, additional surgical treatment is necessary.
- Precautions (including self-care): Do not chew hard foods with the treated area until treatment is complete, do not squeeze out pus or manipulate the fistula yourself, and take prescribed antibiotics and painkillers as directed.
- Emergency signs (immediate medical attention required): Difficulty breathing, difficulty swallowing, rapidly progressing facial swelling, high fever, and generalized weakness may indicate the spread of infection and require emergency treatment.
Outpatient Visit Checklist (Including Example Questions)
- Items/information to bring:
- A list of medications currently being taken (including anticoagulants and immunosuppressants) and allergies (especially to penicillin, etc.)
- History of previous dental treatment and root canal treatment, and recent images (radiographs) or medical certificates
- When symptoms began and their progression (changes in pain intensity, presence of fever, and development of swelling)
- Whether antibiotics were taken recently and their effects
- Presence or absence of chronic diseases (diabetes, heart disease, immunosuppression, etc.)
- Examples of questions that may be asked during the outpatient visit (it is helpful for patients to prepare in advance):
- When did the pain start? In what situations does it worsen (chewing, temperature, etc.)?
- Have you had swelling or fever? Have the symptoms been gradually worsening?
- Have you previously received root canal treatment on this tooth? Have you taken any medication?
- Does the tooth feel loose or raised when eating?
Examples of General Questions to Ask the Doctor
- What are the side effects of this medication (the prescribed antibiotic/painkiller), and how long should I take it?
- Can this tooth be preserved, or does it need to be extracted?
- What is the success rate of treatment and the likelihood of recurrence after root canal treatment?
- How long will treatment take, and what is the expected recovery time?
Examples of Condition-Specific Questions
- Is there a possibility that the abscess can be completely resolved with conservative root canal treatment alone, or should surgical resection (apicoectomy) be considered from the outset?
- There is a fistula (sinus tract) in my gums; when will the fistula disappear if it remains, and how should the fistula itself be managed?